CN111536205A

CN111536205A - Low return clearance planetary reducer for numerical control machine tool

Info

Publication number: CN111536205A
Application number: CN202010433962.1A
Authority: CN
Inventors: 王诗豪
Original assignee: Anhui Jinye Cnc Technology Co ltd
Current assignee: Anhui Jinye Cnc Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-14
Anticipated expiration: 2040-05-21
Also published as: CN111536205B

Abstract

The invention relates to the technical field of numerical control machine tools and discloses a low return clearance planetary reducer for a numerical control machine tool. This digit control machine tool is with low return clearance planetary reducer, the degree of depth through the ring gear of parcel planet wheel is by the even increase design in the left-right side, when there is friction loss in the gear between sun gear and planet wheel, by steel spring's elastic force effect, three planet wheel on the planet carrier moves right at the leftmost end of ring gear, continue to keep the state of stable low return clearance meshing, thereby the effectual long-term effectual transmission that keeps high accuracy of planetary reducer of having ensured, thereby ensured the long-term high efficiency transmission of planetary reducer.

Description

Low return clearance planetary reducer for numerical control machine tool

Technical Field

The invention relates to the field of numerical control machine tools, in particular to a low return clearance planetary reducer for a numerical control machine tool.

Background

The planetary reducer is a reduction transmission device widely applied, the transmission precision of the planetary gear depends on the matching between gears, the clearance refers to the clearance between the gears and is generally called return clearance, the larger the return clearance is, the poorer the precision is, otherwise, the higher the precision is, the precision requirement of the return clearance is high in the application of the planetary reducer to a numerical control machine tool, so that the transmission precision and the efficiency of the numerical control machine tool are ensured to be high, and the precision of machined parts is kept to be higher.

However, since the planetary reducer works through gear transmission, the return clearance of the planetary reducer needs to be controlled, so that friction loss exists between the gears, and along with the increase of the friction loss, the return clearance between the gears is increased, which causes the transmission precision and efficiency of the planetary reducer to be continuously reduced after long-term work, and affects the machining precision of the numerical control machine tool.

Disclosure of Invention

Aiming at the defects of the background technology, the invention provides the low-return-clearance planetary reducer for the numerical control machine tool, which has the advantage of effectively keeping high-precision transmission for a long time and solves the problems in the background technology.

The invention provides the following technical scheme: a low return clearance planetary reducer for a numerical control machine tool comprises a speed reducer case, wherein power input shafts and power output shafts are movably sleeved on two sides of the speed reducer case respectively, one ends of the power input shafts and the power output shafts are provided with planetary wheels and sun wheels which are positioned in an inner cavity of the speed reducer case respectively, the sun wheels at one ends of the power output shafts are meshed between three planetary wheels, a gear ring is arranged inside the speed reducer case, inner teeth of the gear ring are meshed with outer edges of the three planetary wheels, the width values of the three planetary wheels are twice of the sun wheels, the width values of the inner teeth of the gear ring are three times of that of the planetary wheels, the depth of the inner teeth of the gear ring is uniformly increased from left to right, the three planetary wheels are initially meshed with the leftmost ends of the inner teeth of the gear ring, the three planetary wheels can move to the right, the middle parts of the three planetary wheels are provided with planetary connecting shafts in a bearing, the three planet connecting shafts can move towards the axis of the planet carrier, one planet carrier is in transmission connection with the power output shaft, an end face bearing is arranged on the side face of the planet carrier, and a steel spring is arranged between the end face bearing and the inner cavity of the speed reducer case.

Preferably, the side of the reduction gearbox is fixedly sleeved with a limit sleeve positioned on the outer side of the power output shaft, the middle part of the limit sleeve is in threaded sleeve connection with an adjusting solenoid, and the two sides of the adjusting solenoid are respectively and fixedly sleeved with a baffle positioned on the outer side and the inner side of the reduction gearbox, wherein the baffle positioned on the inner side of the reduction gearbox is fixedly connected with one end of a steel spring, and a sliding bearing is arranged between the inner ring of the adjusting solenoid and the power output shaft.

Preferably, the input connecting shaft located in the inner cavity of the speed reducer case is movably sleeved at one end of the power input shaft, the top of the input connecting shaft is fixedly connected with a limiting strip, the input connecting shaft is movably sleeved at one end, far away from the power input shaft, of the input connecting shaft, the input connecting pipe is fixedly sleeved with the sun wheel, and the input connecting pipe is in bearing sleeve joint with two planet carriers.

Preferably, one end of the power output shaft is movably sleeved with an output connecting shaft located in an inner cavity of the speed reducer case, the top of the output connecting shaft is fixedly connected with a limiting strip, an output linkage pipe is movably sleeved at one end of the output connecting shaft, which is far away from the power output shaft, one end of the output linkage pipe is fixedly connected with the side face of the planet carrier, and the output linkage pipe is located inside the end face bearing and is not in contact with an inner ring of the end face bearing.

Preferably, set up the logical groove of three axle center symmetry on the planet carrier, and three logical groove cup joints in the one end activity of three planet even axle respectively, and three logical groove all sets up the interior spout that is located on the planet carrier by the outer edge of planet carrier towards the axle center, every on two lateral walls that lead to the groove, the planet is the fixture block of fixedly connected with and interior spout joint respectively in the both sides of axle one end.

The invention has the following beneficial effects:

according to the low-return-clearance planetary reducer for the numerical control machine tool, the depth of a gear ring wrapping a planetary gear is uniformly increased from left to right, when friction loss exists between a sun gear and the planetary gear, under the elastic action of a steel spring, three planetary gears on a planet carrier move rightwards at the leftmost end of the gear ring, and a stable low-return-clearance meshing state is continuously kept, so that the planetary reducer is effectively kept in high-precision transmission for a long time, the long-term high-efficiency transmission of the planetary reducer is guaranteed, and meanwhile, the service life of the low-return-clearance planetary reducer required by the numerical control machine tool is prolonged compared with that of the conventional planetary reducer; and, along with planetary reducer's continuous work, the contact site temperature between planet wheel, sun gear and the ring gear risees, and elastic expansion deformation that arouses under high temperature environment can make planet wheel, sun gear and planet carrier wholly overcome the elasticity of steel spring, moves to the left relative ring gear, under the transmission that keeps the high accuracy, has reduced the friction loss between planet wheel, sun gear and the ring gear, has further ensured planetary reducer long-term effectual high accuracy transmission that keeps.

Drawings

FIG. 1 is a schematic sectional view of a planetary reduction gear of the present invention;

FIG. 2 is a structural side view of the ring gear of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic structural view of the planet carrier of FIG. 1 according to the present invention;

FIG. 4 is a cutaway schematic view of the planet carrier of FIG. 1 in accordance with the present invention;

fig. 5 is a side view of the power input shaft of fig. 1 in accordance with the present invention.

In the figure: 1. a reduction case; 101. a limiting sleeve; 102. adjusting a solenoid; 103. a sliding bearing; 2. a power input shaft; 201. an input connecting shaft; 202. an input linkage pipe; 3. a power take-off shaft; 301. an output connecting shaft; 302. an output linkage pipe; 4. a planet wheel; 5. a sun gear; 6. a ring gear; 7. a planet carrier; 701. an end face bearing; 702. a through groove; 703. an inner chute; 8. a planet connecting shaft; 801. a clamping block; 9. a steel spring.

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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a low return clearance planetary reducer for a numerical control machine tool comprises a reducer case 1, a power input shaft 2 and a power output shaft 3 are respectively movably sleeved on two sides of the reducer case 1, the power input shaft 2 is connected with a driving motor of the numerical control machine tool and provides driving rotation power by the numerical control machine tool, the power output shaft 3 is connected with a workpiece of the numerical control machine tool, one end of the power input shaft 2 and one end of the power output shaft 3 are respectively provided with a planetary gear 4 and a sun gear 5 which are positioned in an inner cavity of the reducer case 1, the sun gear 5 at one end of the power output shaft 3 is meshed among three planetary gears 4, a gear ring 6 is arranged inside the reducer case 1, inner teeth of the gear ring 6 are meshed with outer edges of the three planetary gears 4, the width values of the three planetary gears 4 are two times that of the sun gear 5, the width value of the inner teeth of the gear ring 6, three planet wheels 4 are initially meshed with the leftmost end of the internal teeth of the gear ring 6, the three planet wheels 4 can move to the right, the middle parts of the three planet wheels 4 are respectively sleeved with a planet connecting shaft 8, two ends of the three planet connecting shafts 8 are respectively sleeved with a planet carrier 7 positioned on two sides of the planet wheels 4, the three planet connecting shafts 8 can move towards the axes of the planet carriers 7, one planet carrier 7 is in transmission connection with the power output shaft 3, the side surface of the planet carrier 7 is provided with an end surface bearing 701, a steel spring 9 is arranged between the end surface bearing 701 and the inner cavity of the speed reducer case 1, the power input shaft 2 is driven to rotate by a driving motor, the sun wheel 5 is driven to rotate at the same speed by the input connecting shaft 201 and the input connecting pipe 202, the speed is reduced by the transmission of the planet wheels 4, the planet carrier 7, the output connecting pipe 302, the output connecting shaft 301 and the power, the friction loss of the gears between the sun gear 5 and the planet gears 4 is increased along with the increase of the return clearance between the sun gear 5 and the planet gears 4 and the return clearance between the planet gears 4 and the gear ring 6, the three planet gears 4 on the planet carrier 7 move rightwards at the leftmost end of the gear ring 6 under the elastic action of the steel spring 9, and the meshing state of the stable low return clearance is continuously kept, so that the long-term effective high-precision transmission of the planetary reducer is effectively ensured, the long-term high-efficiency transmission of the planetary reducer is ensured, meanwhile, the service life of the low return clearance planetary reducer required by a numerical control machine tool is prolonged compared with that of the existing planetary reducer, and along with the continuous work of the planetary reducer, the temperature of the contact parts among the planet gears 4, the sun gear 5 and the gear ring 6 is increased, and the elastic deformation is caused under the high-temperature, the elasticity of the steel spring 9 can be overcome by the whole of the planet wheel 4, the sun wheel 5 and the planet carrier 7, the relative gear ring 6 moves leftwards, the high-precision transmission is kept, the friction loss among the planet wheel 4, the sun wheel 5 and the gear ring 6 is reduced, and the long-term effective high-precision transmission of the planetary reducer is further guaranteed.

Wherein, the fixed cover in side of speed reducer case 1 is equipped with stop collar 101 that is located the power output shaft 3 outside, the middle part screw thread of stop collar 101 cup joints by adjusting solenoid 102, and the fixed cover respectively is equipped with the baffle that is located the speed reducer case 1 outside and inboard in the both sides of adjusting solenoid 102, wherein the baffle that is located speed reducer case 1 inboard is connected with the one end fixed connection of steel spring 9, be equipped with slide bearing 103 between the inner circle of adjusting solenoid 102 and power output shaft 3, through the baffle in the rotatory speed reducer case 1 outside, make and adjust solenoid 102 rotatory, and then control the compression degree of steel spring 9, and then ensure that the lateral thrust to planet carrier 7 is enough, ensure the stable meshing between planet wheel 4, sun gear 5 and the ring gear 6, ensure that planet gear keeps stable when working.

Wherein, the one end activity of power input shaft 2 is cup jointed and is located the even axle 201 of input of 1 inner chamber of reduction case, and the top fixedly connected with spacing of the even axle 201 of input, the one end activity that keeps away from power input shaft 2 of even axle 201 of input has cup jointed input linkage pipe 202, the one end and the sun gear 5 fixed cup joint of input linkage pipe 202, and input linkage pipe 202 and two planet carrier 7 equal bearing cup joints, make input linkage pipe 202 along with power input shaft 2 when rotatory at the same speed, can input linkage pipe 202 relatively remove, thereby under steel spring 9's spring action, provide planet wheel 4, when the compensation of wearing and tearing between sun gear 5 and the ring gear 6, do not influence the rotation to power input shaft 2 and slow down.

Wherein, the one end movable sleeve of power output shaft 3 is equipped with the output link 301 that is located the reduction gear 1 inner chamber, and the top fixedly connected with spacing of output link 301, output link 301's the one end activity of keeping away from power output shaft 3 has cup jointed output linkage pipe 302, the one end of output linkage pipe 302 and the side fixed connection of planet carrier 7, output linkage pipe 302 is located the inside of face bearing 701, and not contact with the inner circle of face bearing 701, make output linkage pipe 302 along with power output shaft 3 is rotatory with the same speed, can output linkage pipe 302 relatively and remove, thereby under the spring action of steel spring 9, provide planet wheel 4, when the compensation of wearing and tearing between sun gear 5 and the ring gear 6, do not influence the rotation drive to power output shaft 3.

Wherein, the planet carrier 7 is provided with three through grooves 702 with symmetrical axes, the three through grooves 702 are respectively movably sleeved at one end of the three planet connecting shafts 8, the three through grooves 702 are all towards the axes by the outer edge of the planet carrier 7, the two side walls of each through groove 702 are respectively provided with the inner chutes 703 positioned on the planet carrier 7, two sides of one end of each planet connecting shaft 8 are respectively and fixedly connected with the fixture blocks 801 clamped with the inner chutes 703, when the planet wheel 4, the sun wheel 5 and the gear ring 6 are worn, the planet wheel 4, the sun wheel 5 and the planet carrier 7 integrally move to the right under the elastic force of the steel spring 9, at the moment, the three planet connecting shafts 8 between the two planet carriers 7 move towards the axes of the planet carrier 7 in the through grooves 702, so that the three planet wheels 4 move towards the sun wheel 5 at the center, and further the friction loss between the planet wheel 4, the sun wheel 5 and the, The meshing between the sun gear 5 and the gear ring 6 still keeps low return clearance, and therefore the planetary reducer is guaranteed to keep efficient transmission for a long time.

During operation, the drive device on the digit control machine tool drives power input shaft 2 to rotate, through input even axle 201, input linkage pipe 202, sun gear 5, planet wheel 4, planet even axle 8, planet carrier 7, output linkage pipe 302, output even axle 301, power output shaft 3's transmission slows down, make the processing part of digit control machine tool carry out the processing work, at planet wheel 4, when meshing between sun gear 5 and the ring gear 6 is because of the friction loss, steel spring 9's elasticity makes planet wheel 4, sun gear 5 moves to the right relative ring gear 6, make planet wheel 4, continue to keep low return stroke clearance state between sun gear 5 and the ring gear 6, can.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a digit control machine tool is with low return clearance planetary reducer, including reduction gear case (1), the both sides of reduction gear case (1) are movable sleeve respectively and are equipped with power input shaft (2) and power output shaft (3), the one end of power input shaft (2) and power output shaft (3) is equipped with planet wheel (4) and sun gear (5) that are located reduction gear case (1) inner chamber respectively, and sun gear (5) the meshing of power output shaft (3) one end is between three planet wheel (4), its characterized in that: the inside of speed reduction machine case (1) is equipped with ring gear (6), and the outer meshing of following of the internal tooth of ring gear (6) and three planet wheel (4), three the width value of planet wheel (4) is sun gear (5) twice, and power input shaft (2), the internal tooth width value of ring gear (6) is the triple of planet wheel (4), and the degree of depth of the internal tooth of ring gear (6) is from left to right even increase, three planet wheel (4) initial meshing is at the leftmost end of ring gear (6) internal tooth, and three planet wheel (4) can move to the right, three the equal bearing housing in middle part of planet wheel (4) is equipped with planet even axle (8), and the both ends of three planet even axle (8) are equipped with planet carrier (7) that are located planet wheel (4) both sides, three planet even axle center motion to planet carrier (7), one planet carrier (7) are connected with power output shaft (3) transmission, and the side of the planet carrier (7) is provided with an end face bearing (701), and a steel spring (9) is arranged between the end face bearing (701) and the inner cavity of the speed reducer case (1).

2. The planetary reducer with low return clearance for the numerical control machine tool according to claim 1, characterized in that: the side of reduction case (1) is fixed the cover and is equipped with stop collar (101) that are located the power take off (3) outside, the middle part screw thread of stop collar (101) cup joints by adjusting solenoid (102), and adjusts the both sides of solenoid (102) and fix the cover respectively and be equipped with the baffle that is located the reduction case (1) outside and inboard, wherein be located the one end fixed connection of baffle and steel spring (9) of reduction case (1) inboard, be equipped with slide bearing (103) between the inner circle of adjusting solenoid (102) and power take off (3).

3. The planetary reducer with low return clearance for the numerical control machine tool according to claim 1, characterized in that: the input that is located reduction gear box (1) inner chamber is cup jointed in the one end activity of power input shaft (2) even axle (201), and the top fixedly connected with spacing of input even axle (201), the one end activity of keeping away from power input shaft (2) of input even axle (201) has cup jointed input linkage pipe (202), the one end and the sun gear (5) fixed socket joint of input linkage pipe (202), and input linkage pipe (202) and two planet carrier (7) equal bearing cup joints.

4. The planetary reducer with low return clearance for the numerical control machine tool according to claim 1, characterized in that: the one end movable sleeve of power output shaft (3) is equipped with output even axle (301) that is located reduction gear box (1) inner chamber, and the top fixedly connected with spacing of output even axle (301), the one end activity of keeping away from power output shaft (3) of output even axle (301) has cup jointed output linkage pipe (302), the one end of output linkage pipe (302) and the side fixed connection of planet carrier (7), output linkage pipe (302) are located the inside of end face bearing (701), and do not contact with the inner circle of end face bearing (701).

5. The planetary reducer with low return clearance for the numerical control machine tool according to claim 1, characterized in that: set up logical groove (702) of three axle center symmetry on planet carrier (7), and three logical groove (702) cup joint in the one end activity of three planet even axle (8) respectively, three logical groove (702) are by the outer edge of planet carrier (7) towards the axle center, every all set up interior spout (703) that are located on planet carrier (7) on two lateral walls that lead to groove (702), and the planet is connected fixture block (801) of fixedly connected with and interior spout (703) joint respectively in the both sides of axle (8) one end.