CN210548651U - Bevel gear internal gear electrolytic machining movement device with small reference circle diameter - Google Patents
Bevel gear internal gear electrolytic machining movement device with small reference circle diameter Download PDFInfo
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Abstract
The utility model provides a little reference circle diameter's skewed tooth internal gear electrolytic machining telecontrol equipment, belong to the accurate reduction gear of robot and prepare technical field, structurally constitute by linear motion mechanism and rotary motion mechanism, wherein rotary motion mechanism is two-stage planet speed reduction motion, accomplish through the servo motor drive, linear motion mechanism is hydraulic motion mechanism, realize through business turn over hydraulic oil, novel structure of the device, realize processing through given linear feed speed and rotatory angular velocity, wherein linear feed speed is adjustable at 0.5mm/min ~ 5mm/min within range, circumference rotation angle: the angle of rotation is adjustable within the range of 0-45 degrees, the angular velocity of rotation can be adjusted within the range of 0-0.0011 radian/second-0.00022 radians/second, the machining precision is high, the generated vibration is small, the additional dynamic load is reduced, the bearing capacity is high, the reliability is increased, the service life is prolonged, the requirement of precise transmission can be met, and particularly the precision cutting machining of the helical gear with the small pitch circle diameter can be realized.
Description
Technical Field
The utility model belongs to the technical field of the accurate reduction gear of robot preparation, a device of accurate gear machining is related to, specific saying so relates to a device that is used for the small pitch circle diameter skewed tooth internal gear electrolytic machining motion of structure miniaturization or robot joint reduction gear.
Background
The intelligent manufacturing is an important direction for the development of equipment manufacturing industry in China, and a large amount of high-end intelligent manufacturing equipment represented by industrial robots is needed in the development process. There are many components constituting an industrial robot, and among them, a precision reducer is a core component in an industrial robot and is also a relatively high-cost component.
The precision reducer is a key part of an industrial robot, accounts for more than 30% of the cost, and is mainly divided into a harmonic gear reducer, an RV reducer, a cycloidal pin gear planetary reducer, a precision planetary reducer and the like. The precision planetary reducer mainly consists of a planetary gear, a sun gear and an outer gear ring, and has higher rigidity and precision, high transmission efficiency and high torque. Wherein harmonic reducers and RV reducers are the mainstream products. According to calculation 2020, the demand of the robot speed reducer is about 115 thousands of units in China, and the market scale is about 42 million yuan. From the competitive format, the global precision speed reducer is monopolized by the Japanese enterprises for a long time, and the domestic brands are put into mass production and sold in a small range at present. Due to the limitation of factors such as materials, technology, precision machining capability and the like, most of precision reducers in China are imported, so that the development of industrial robots in China is greatly limited.
At present, three major core part controllers, servo motors and speed reducers of industrial robots in China are major bottlenecks restricting the industry of the robots in China, and account for 70% of the cost of the robots. Among the three, the speed reducer is highly monopolized by foreign manufacturers, and the domestic speed reducer which is still in the popularization stage at present cannot be comprehensively imported and replaced. The bottleneck problems to be solved urgently in the field of domestic robot precision reducers are mainly as follows: firstly, batch manufacturing and detection technologies need to be improved, and the method comprises an efficient and high-precision manufacturing process and equipment, and batch high-precision quick detection of parts and the whole machine; the precision life is to be verified, and the precision life comprises failure mechanism and rule, high-performance material optimization and the like; thirdly, a series optimization design system is to be perfected, and the series optimization design system, the cycloidal gear shape modification optimization and the like are included; and fourthly, the feedback and optimization of the engineering application data are lacked, and the feedback and optimization of the construction and performance tracking of the engineering application database and the like are included.
Chinese patent application No. CN2017114827687 utility model discloses a method for processing internal gear teeth, this processing method uses generating method gear grinding processing technique with higher processing precision to manufacture internal gear teeth, but fails to be successfully implemented in internal gear teeth processing, and in the prior art, internal gear processing usually adopts forming method processing methods such as gear shaping, tooth pulling, forming milling, but the manufacturing precision of the internal gear teeth processed by the above methods is lower, generally not more than 7 grades, resulting in the gear generating vibration, noise, additional dynamic load in the internal gearing, reducing the bearing capacity, life and reliability of the gear, and failing to meet the requirement of medium and high-end equipment for accurate transmission.
The utility model discloses a chinese patent application No. CN2012103815240 utility model discloses an electrolytic machining method and device of difficult-to-cut material, little modulus internal gear, the most important advantage of this patent is that the straight toothed spur gear that has solved the hardening internal surface and can't adopt conventional means to process through means such as broaching, milling has improved to adopt the electrolytic machining means, nevertheless does not obtain solving to the processing problem of skewed tooth spur gear.
With the development of the technology, the whole trend of miniaturization of the industrial robot is inevitable, the manufacturing process and equipment with high efficiency and high precision are in the forefront, and the processing of the internal helical gear with small reference circle diameter is the key problem of the precision planetary gear reducer. At present, the traditional methods of rolling, inserting, grinding, shaving, planing and the like are adopted for manufacturing the helical internal cylindrical gear, but for processing the internal helical cylindrical gear with small pitch circle diameter, a high-precision cutting method is still lacked at present, and the manufacturing is difficult. The traditional machining method has the defects of low precision, vibration generation in transmission, increased additional dynamic load, low bearing capacity, short service life and poor reliability, and cannot meet the requirement of precise transmission, so that the bevel gear internal gear electrochemical machining moving device with small reference circle diameter is needed to be designed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a skewed tooth internal gear electrolytic machining telecontrol equipment of little reference circle diameter to the processing method precision of present little reference circle diameter's interior skewed tooth roller gear lower, produce vibration in the transmission, additional dynamic load increases, bearing capacity is low, the life-span is low, the reliability is poor, can not satisfy not enough such as accurate transmission requirement, can realize carrying out the precision cutting to little reference circle diameter interior skewed tooth roller gear through the device.
The technical scheme of the utility model is that: the utility model provides a skewed tooth internal gear electrolytic machining telecontrol equipment of little reference circle diameter, includes servo motor, its characterized in that: the processing motion device consists of a rotary motion device and a linear motion device;
the rotary motion device is composed of a primary planetary gear reducer and a secondary planetary gear reducer;
the primary planetary gear reducer is formed by connecting an upper shell, a bridge, a secondary planetary gear, a needle bearing, a gear carrier, a hollow gear shaft, a few-tooth shaft, an upper end cover, a primary planetary gear, a primary duplicate gear and an intermediate connecting shell; the upper end cover is arranged at the top of the upper shell, the top end of the small-tooth-number shaft is connected with a rotating shaft of the servo motor through a flat key, the small-tooth-number shaft is arranged inside the upper shell, inner teeth are arranged at the upper end and the lower end of the inner wall of the upper shell, a plurality of first-stage planetary gears are respectively meshed with the outer teeth of the small-tooth-number shaft and the inner teeth at the upper end of the inner wall of the upper shell, the gear carrier is arranged outside the end surface of the first-stage planetary gears, each first-stage planetary gear is axially fixedly connected with the gear carrier through a hollow gear shaft, the upper coupling gear of the first-stage planetary gears is meshed with the lower coupling gear of the first-stage planetary gears and the inner teeth below the inner wall of the upper shell, a plurality of second-stage planetary gears are respectively meshed with the lower coupling gear of the first-stage planetary gears and the inner, the center of each second-stage planetary gear is provided with a shaft sleeve, the bridge is in axial fixed connection with each second-stage planetary gear through the shaft sleeves, the bottom of the bridge is rotatably connected to the center of the middle connecting shell, the upper end of the shaft with the small number of teeth is connected and arranged in a central hole of the end cover, and the lower end of the shaft with the small number of teeth is connected and arranged in a central hole above the bridge;
the second-stage planetary gear reducer is formed by connecting a middle shell, a planetary carrier output shaft, a planetary carrier, a third-stage gear shaft, a cylindrical positioning pin, a second-stage duplicate gear and a middle connecting shell; the middle shell is connected and arranged below the middle connecting shell, an inner gear is arranged on the inner wall of the middle connecting shell, the inner gear is fixedly connected with the middle connecting shell through a cylindrical positioning pin, the planet carrier output shaft is arranged at the center of the middle shell, the third gear shaft is rotatably arranged between the center of the upper end of the planet carrier output shaft and the center of the lower end of the middle connecting shell, the upper end of the third gear shaft is connected with the lower end of the bridge in a clamping manner, the upper coupling gear of the second stage duplicate gear is respectively connected with the third gear shaft and the inner gear in a meshing manner, a planet carrier is arranged on the outer side of the end surface of the second stage duplicate gear, a gear shaft is arranged at the center of the second stage duplicate gear, the gear shaft is fixedly connected with the second stage duplicate gear through the cylindrical positioning pin, and inner teeth, the lower coupling gear of the second-stage dual gear is meshed with the internal teeth at the top of the planet carrier, and the output shaft of the planet carrier completes the rotary motion with high reduction ratio under the driving of the second-stage dual gear;
the linear motion device is formed by connecting an electrolysis motion driving shaft, a guide cover, a lower end cover, a thrust ball bearing, a positioning cylindrical pin, a sealing ring, a guide sleeve, a guide locking nut, a guide return spring, an intermediate shell and a planet carrier output shaft;
the planet carrier output shaft is rotationally arranged inside the middle shell, a guide sleeve is arranged between the outer wall of the planet carrier output shaft and the inner wall of the middle shell, a guide cover is arranged at the bottom of the guide sleeve, the guide cover is fixedly connected with the guide sleeve through a bolt, the guide sleeve is fixedly connected with the planet carrier output shaft through a guide locking nut, a lower end cover is arranged at the periphery of the guide cover, the lower end cover is fixedly connected with the bottom surface of the middle shell through a bolt, a cavity is arranged inside the planet carrier output shaft, a pressure inlet and outlet oil port is arranged on the wall of the cavity, the electrolysis motion driving shaft is arranged in the cavity in the planet carrier output shaft in a sliding manner, a sealing ring and a guide reset spring are arranged between the electrolysis motion driving shaft and the planet carrier output shaft, and during oil feeding, the oil pressure overcomes the pressure of, and during oil discharge, the electrolysis motion driving shaft moves upwards under the action of the guide return spring, an electrolysis cutter is connected and mounted on the bottom shaft head of the electrolysis motion driving shaft, and the electrochemical machining of the helical gear with the small pitch circle diameter is completed through the combined action of linear motion and rotary motion.
The inner hole at the lower end of the planet carrier output shaft and the inner hole of the electrolysis motion driving shaft form a hydraulic cylinder, a sealing ring positioning ring is arranged on the inner hole wall of the planet carrier output shaft, an O-shaped sealing ring is arranged in the sealing ring positioning ring, the shifting-out section of the electrolysis motion driving shaft is in a waist drum shape, a guide hole in the guide cover is also a waist drum-shaped hole matched with the electrolysis motion driving shaft, and the electrolysis motion driving shaft and the guide hole form sliding clearance fit.
The center hole of the upper end cover and the center hole of the bridge are coaxially arranged, angular contact ball bearings are arranged in the center hole of the upper end cover and the center hole of the bridge, and the few-tooth shaft forms supporting positioning through the angular contact ball bearings and rotates between the upper end cover and the bridge.
The number of the first-stage planetary gears and the number of the second-stage planetary gears are 3-4.
The hollow gear shaft penetrates through holes of the first-stage planetary gear and the gear carrier, a needle bearing is arranged between the hollow gear shaft and the first-stage planetary gear, and the upper end of the hollow gear shaft is axially positioned through a shaft position gasket and a shaft clamping ring.
The joint of the bridge and the third-stage gear shaft is in clamping fit with the convex block and the groove.
The second-stage planetary gear is sleeved on the shaft sleeve in an empty mode, and the shaft sleeve is installed on the bridge frame through bolts and then locked through a flat washer, a light spring washer and a nut.
The second-stage duplicate gear is arranged on the gear shaft, and the gear shaft and the second-stage duplicate gear have a common angular velocity through the cylindrical positioning pin; the gear shaft is supported on the planet carrier through 2 angular contact ball bearings, and the axial position of the gear shaft is limited by the shaft clamping rings at the two ends of the gear shaft.
The hole of going up the casing has 2 internal gear cylindrical gear pairs, and the addendum circle diameter of internal gear is big end to end setting, and intermediate junction casing passes through the tang location with last casing, guarantees to be concentric, through cylinder locating pin restriction angular rotation, goes up the casing and passes through the tang location with the upper end cover, guarantees to be concentric, through cylinder locating pin restriction angular rotation, through screw, plain washer, light-duty spring washer with last casing and upper end cover fastening.
On one hand, the middle connecting shell is connected with the middle shell through a spigot, and the middle connecting shell and the middle shell cannot rotate through a positioning pin; the middle connecting shell and the inner gear are matched through the shaft hole to ensure that the middle connecting shell and the inner gear are concentric, and the angular rotation is limited through the cylindrical positioning pin; the middle connecting shell is also a mounting positioning piece of a pair of thrust ball bearings mounted back to back; the middle connecting shell and the upper shell are positioned through the seam allowance, concentricity is guaranteed, and angular rotation is limited through the cylindrical positioning pin.
The utility model has the advantages that: the utility model provides a pair of skewed tooth internal gear electrolytic machining telecontrol equipment of little reference circle diameter, structural by linear motion mechanism and rotary motion mechanism constitute, wherein rotary motion mechanism is two-stage planet speed reduction motion, accomplish through the servo motor drive, linear motion mechanism is hydraulic motion mechanism, realize through business turn over hydraulic oil, the device is novel structure, realize processing through given linear feed speed and rotatory angular velocity, wherein linear feed speed is adjustable at 0.5mm/min ~ 5mm/min within range, circumference rotation angle: the angle of rotation is adjustable within the range of 0-45 degrees, the angular velocity of rotation can be adjusted within the range of 0-0.0011 radian/second-0.00022 radians/second, the machining precision is high, the generated vibration is small, the additional dynamic load is reduced, the bearing capacity is high, the reliability is increased, the service life is prolonged, the requirement of precise transmission can be met, and particularly the precision cutting machining of the helical gear with the small pitch circle diameter can be realized.
Drawings
Fig. 1 is a schematic view of the overall assembly structure of the present invention.
Fig. 2 is an enlarged schematic view of P in fig. 1.
3 fig. 33 3 is 3 a 3 schematic 3 view 3 of 3 the 3 cross 3- 3 sectional 3 structure 3 in 3 the 3 direction 3 of 3 a 3- 3 a 3 in 3 fig. 32 3. 3
Fig. 4 is a schematic view of the cross-sectional structure in the direction B-B in fig. 1.
In the figure: electrolytic motion drive shaft 1, guide cover 2, bolt 3, light spring washer 4, flat washer 5, lower end cover 6, first thrust ball bearing 7, positioning cylindrical pin 8, seal ring 9, seal ring 10, seal ring positioning ring 11, O-shaped seal ring 12, guide sleeve 13, guide lock nut 14, guide return spring 15, seal ring 16, intermediate housing 17, planet carrier output shaft 18, second thrust ball bearing 19, planet carrier 20, positioning pin 21, first cylindrical positioning pin 22, internal gear 23, bearing 24, second cylindrical positioning pin 25, upper housing 26, bridge 27, second stage planetary gear 28, gasket 29, shaft sleeve 30, bolt 31, first flat washer 32, first light spring washer 33, first stage planetary gear 34, needle roller bearing 35, gear carrier 36, hollow gear shaft 37, shaft position washer 38, shaft washer 39, first angular contact ball bearing 40, second angular contact ball bearing 40, and third angular contact ball bearing, The small tooth number shaft 41, the flat key 42, the O-shaped sealing ring 43, the surrounding gasket 44, the upper end cover 45, the screw 46, the second flat gasket 47, the second light spring gasket 48, the screw 49, the flat gasket 50, the light spring gasket 51, the third gear shaft 52, the gear shaft 53, the third cylindrical positioning pin 54, the shaft collar 55, the screw 56, the flat gasket 57, the light spring gasket 58, the second-stage duplicate gear 59, the second angular contact ball bearing 60, the angular contact ball bearing 61, the spacer ring 62, the shaft surrounding ring 63, the pressure oil inlet and outlet 64, the pressure oil inlet and outlet sealing gasket 65, the radial positioning pin 66, the screw 67, the flat gasket 68, the light spring gasket 69, the electrolytic machining insulating head 70, the gasket 71, the first-stage central duplicate gear 72, the nut 73, the middle connecting shell 74 and the fourth cylindrical positioning pin 75.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in figure 1, the small pitch circle diameter helical gear electrochemical machining moving device consists of a rotary moving device and a linear moving device; the rotary motion device is composed of a primary planetary gear reducer and a secondary planetary gear reducer; the primary planetary gear reducer is formed by connecting an upper shell 26, a bridge 27, a secondary planetary gear 28, a needle bearing 35, a gear carrier 36, a hollow gear shaft 37, a few-tooth-number shaft 41, an upper end cover 45, a primary planetary gear 34, a primary duplicate gear 72 and an intermediate connecting shell 74; an upper end cover 45 is arranged at the top of the upper shell 26, the top end of a small-tooth-number shaft 41 is connected with a rotating shaft of a servo motor through a flat key 42, the small-tooth-number shaft 41 is arranged inside the upper shell 26, inner teeth are arranged at the upper end and the lower end of the inner wall of the upper shell 26, a plurality of first-stage planetary gears 34 are respectively meshed and connected with the outer teeth of the small-tooth-number shaft 41 and the inner teeth at the upper end of the inner wall of the upper shell 26, a gear frame 36 is arranged outside the end surface of the first-stage planetary gears 34, each first-stage planetary gear 34 is axially fixedly connected with the gear frame 36 through a hollow gear shaft 37, an upper coupling gear of a first-stage double gear 72 is meshed and connected with the lower portion of the gear frame 36, a plurality of second-stage planetary gears 28 are respectively meshed and connected with a lower coupling gear of the first-stage double gear 72 and the inner teeth below the inner wall of the upper shell, the bridge frame 27 is in axial fixed connection with each second-stage planetary gear 28 through a shaft sleeve 30, the bottom of the bridge frame 27 is rotatably connected to the center of the middle connecting shell 74, the upper end of the shaft 41 with a small number of teeth is connected and arranged in the central hole of the upper end cover 45, and the lower end of the shaft 41 with a small number of teeth is connected and arranged in the central hole above the bridge frame 27; the secondary planetary gear reducer is formed by connecting a middle shell 17, a planet carrier output shaft 18, a planet carrier 20, a third-stage gear shaft 52, a gear shaft 53, a third cylindrical positioning pin 54, a second-stage duplicate gear 59 and a middle connecting shell 74; the middle shell 17 is connected and arranged below the middle connecting shell 74, the inner wall of the middle connecting shell 74 is provided with an inner gear 23, the inner gear 23 is fixedly connected with the middle connecting shell 74 through a first cylindrical positioning pin 22, the planet carrier output shaft 18 is arranged at the center of the middle shell 17, the third stage gear shaft 52 is rotatably arranged between the upper end center of the planet carrier output shaft 18 and the lower end center of the middle connecting shell 74, the upper end of the third stage gear shaft 52 is connected with the lower end of the bridge 27 in a clamping way, the upper coupling gear of the second stage dual gear 59 is respectively connected with the third stage gear shaft 52 and the inner gear 23 in a meshing way, the outer side of the end surface of the second stage dual gear 59 is provided with the planet carrier 20, the center of the second stage dual gear 59 is provided with a gear shaft 53, the gear shaft 53 is fixedly connected with the second stage dual, the lower coupling gear of the second-stage dual gear 59 is meshed with the internal teeth at the top of the planet carrier output shaft 18, and the planet carrier output shaft 18 completes the rotary motion with high reduction ratio under the drive of the second-stage dual gear 59; the linear motion device is formed by connecting an electrolysis motion driving shaft 1, a guide cover 2, a lower end cover 6, a first thrust ball bearing 7, a positioning cylindrical pin 8, a sealing ring 9, a sealing ring 10, a guide sleeve 13, a guide locking nut 14, a guide return spring 15, a middle shell 17 and a planet carrier output shaft 18; the planet carrier output shaft 18 is rotatably arranged inside the middle shell 17, a guide sleeve 13 is arranged between the outer wall of the planet carrier output shaft 18 and the inner wall of the middle shell 17, a guide cover 2 is arranged at the bottom of the guide sleeve 13, the guide cover 2 is fixedly connected with the guide sleeve 13 through a bolt, the guide sleeve 13 is fixedly connected with the planet carrier output shaft 18 through a guide lock nut 14, a lower end cover 6 is arranged at the periphery of the guide cover 2, the lower end cover 6 is fixedly connected with the bottom surface of the middle shell 17 through a bolt, a cavity is arranged inside the planet carrier output shaft 18, a pressure inlet and outlet oil port 64 is arranged on the wall of the cavity, the electrolysis motion drive shaft 1 is arranged in the cavity in the planet carrier output shaft 18 in a sliding mode, a sealing ring 9, a sealing ring 10 and a guide return spring 15 are arranged between the electrolysis motion drive shaft 1 and the planet carrier output shaft 18, the oil, during oil discharge, the electrolysis motion driving shaft 1 moves upwards under the action of the guide return spring 15, an electrolysis cutter is connected and mounted on a bottom shaft head of the electrolysis motion driving shaft 1, and the electrochemical machining of the helical gear with the small pitch circle diameter is completed through the combined action of linear motion and rotary motion.
As shown in fig. 1-3, in an embodiment of an internal gear electrochemical machining moving device with helical teeth and small pitch circle diameter, an inner hole at the lower end of a planet carrier output shaft 18 and an inner hole of an electrolytic movement driving shaft 1 form a hydraulic cylinder, a sealing ring positioning ring 11 is arranged on the inner hole wall of the planet carrier output shaft 18, an O-shaped sealing ring 12 is arranged in the sealing ring positioning ring 11, the shifting-out section of the electrolytic movement driving shaft 1 is in a waist drum shape, a guide hole on a guide cover 2 is also in a waist drum-shaped hole matched with the electrolytic movement driving shaft 1, and the electrolytic movement driving shaft 1 and the guide hole form; the central hole of the upper end cover 45 and the central hole of the bridge frame 27 are coaxially arranged, the first angular contact ball bearing 40 is arranged in the central hole of the upper end cover and the central hole of the bridge frame, and the few-tooth shaft 41 forms supporting positioning through the first angular contact ball bearing 40 and rotates between the upper end cover 45 and the bridge frame 27; the number of the first-stage planetary gears 34 and the second-stage planetary gears 28 is 4; the hollow gear shaft 37 is arranged in holes of the first-stage planetary gear 34 and the gear carrier 36 in a penetrating mode, a needle bearing 35 is arranged between the hollow gear shaft 37 and the first-stage planetary gear 34, and the upper end of the hollow gear shaft 37 is axially positioned through a shaft position gasket 38 and a shaft retainer ring 39; the joint of the bridge 27 and the third-stage gear shaft 52 is in clamping fit with the convex block and the groove; the second-stage planetary gear 28 is sleeved on a shaft sleeve 30 in an empty way, and the shaft sleeve 30 is installed on the bridge 27 through a bolt 31 and then locked by a first flat washer 32, a first light spring washer 33 and a nut 73; the second-stage duplicate gear 59 is mounted on the gear shaft 53, and the gear shaft 53 and the second-stage duplicate gear 59 have a common angular velocity through the third cylindrical positioning pin 54; the gear shaft 53 is supported on the carrier 20 by 2 second angular contact ball bearings 60, and is restricted in axial position by shaft collars 55 at both ends thereof; the inner hole of the upper shell 26 is provided with 2 internal gear cylindrical gear pairs, the diameter of the addendum circle of the internal gear is arranged in a small-end-up manner, the middle connecting shell 74 and the upper shell 26 are positioned through a seam allowance to ensure concentricity, the angular rotation is limited through the second cylindrical positioning pin 25, the upper shell 26 and the upper end cover 45 are positioned through a seam allowance to ensure concentricity, the angular rotation is limited through the fourth cylindrical positioning pin 75, and the upper shell 26 and the upper end cover 45 are fastened through the screw 46, the second flat gasket 47 and the second light spring gasket 48; the intermediate connecting housing 74 is connected to the intermediate housing 17 by a spigot, and the intermediate connecting housing 74 and the intermediate housing 17 cannot rotate by the positioning pin 21; the middle connecting shell 74 and the internal gear 23 are matched through shaft holes to ensure that the middle connecting shell 74 and the internal gear 23 are concentric, and the angular rotation is limited by the first cylindrical positioning pin 22; the intermediate connecting housing 74 is also a mounting and positioning member for the pair of second thrust ball bearings 19 mounted back-to-back; the intermediate connecting shell 74 is positioned concentrically with the upper shell 26 by means of a spigot, the angular rotation being limited by the second cylindrical positioning pin 25.
As shown in fig. 1 to 3, the working principle of the helical gear electrochemical machining moving device with small pitch circle diameter is as follows:
(1) the working process of the linear motion is as follows: an enclosed space, namely a hydraulic cavity, is formed between the inner hole at the lower end of the planet carrier output shaft 18 and the upper end face and the inner hole of the electrolysis movement driving shaft 1, when oil is fed from the inlet and outlet pressure oil port end 64, the upper end face and the inner hole of the electrolysis movement driving shaft 1 generate downward thrust, the upward elasticity of the guide return spring 15 is overcome, under the guide and sealing of the sealing ring positioning ring 11, the sealing ring 10 and the sealing ring 9, the electrolysis movement driving shaft 1 drives the electrolysis processing insulating clamping head 70 to move downwards slowly and linearly, when the inlet and outlet pressure oil port end 64 is accessed to the atmosphere (namely, in the oil discharge process), under the upward elasticity of the guide return spring 15, the electrolysis movement driving shaft 1 moves upwards under the guide and sealing of the sealing ring positioning ring 11, the sealing ring 10 and the sealing ring 9, and the electrolysis movement driving shaft 1 drives, the electrolysis motion driving shaft 1 can only do linear motion and can not rotate around the axis of the electrolysis motion driving shaft (because the relation between H and phi d in a B-B picture, the matching of the electrolysis motion driving shaft 1, the guide cover 2 and the guide sleeve 13 depends on two planes to limit the rotation freedom degree, and the up-and-down linear motion is realized by the cylindrical matching).
(2) The working process of the rotary motion is as follows: the servo motor drives the shaft 41 with less teeth number through the flat key 42 and rotates around the axial lead thereof at a certain rotating speed under the supporting and positioning of 2 first angular contact ball bearings 40, the planet gear 34 is installed on the 36 gear carrier through the hollow gear shaft 37, the shaft position gasket 38 and the shaft clamping ring 39, the upper shell 26 is fixed, and the planet gear 34 is driven to do relevant rotation along with the rotation of the gear 41 with less teeth number through the internal gear inside, so as to drive the 36 gear carrier to rotate around the axial lead with less teeth number of 41; the gear rack 36 is sleeved on the shaft 41 with the small number of teeth in a hollow manner, and the gear rack 36 rotates around the axial lead of the shaft 41 with the small number of teeth, and simultaneously drives the central duplicate gear 72 to rotate around the axial lead of the shaft 41 with the small number of teeth through the internal gear of the gear rack 36; the 4 pairs of planet gears 28 meshing with the central duplicate gear 72 and the annulus (lower portion) of the upper housing 26 meshing with the planet gears 28 together form a gear kinematic pair. The planetary gear 28 is sleeved on a shaft sleeve 30 in an empty way, and the shaft sleeve 30 is installed on the bridge 27 through a bolt 31 and then locked by a first flat washer 32, a first light spring washer 33 and a nut 73; the planetary gears 28 meshed with the central duplicate gear 72 and the internal gear (lower part) of the upper shell 26 meshed with the planetary gears 28 jointly form a gear motion pair, so that the bridge 27 rotates around the axis of the few-tooth-number shaft 41 to form an output motion and torque increasing mechanism of the gear pair, and the rotating motion and the torque are transmitted to the third-stage gear shaft 52 from the chamfered edge of the bridge 27. The output end (journal portion) of the third stage gear shaft 52 is supported to the common center of rotation of the upper case 26, the carrier 20 through a pair of bearings 24 mounted back to back and the first angular contact ball bearing 40. The third gear shaft 52 is supported by the bearing 24 and the second thrust ball bearing 19 at the common center of rotation of the intermediate connection housing 74 and the carrier 20, and is engaged with the upper gear teeth of the double gear 59 and the internal gear 23 mounted on the intermediate connection housing 74 through the first cylindrical positioning pin 22. The duplicate gear 59 is mounted on the gear shaft 53, and the gear shaft 53 and the duplicate gear 59 have a common angular velocity through the third cylindrical positioning pin 54; the gear shaft 53 is supported on the carrier 20 by 2 second angular ball bearings 60, and is restricted in axial position by shaft collars 55 at both ends thereof. The gear at the lower part of the duplicate gear 59 and the gear at the upper part thereof have equal angular velocity, and the gear at the lower part of the duplicate gear 59 is meshed with the internal gear of the planet carrier output shaft 18 to drive the planet carrier output shaft 18 to rotate around the common rotation center formed by the third stage gear shaft 52 and the planet carrier output shaft 18. The motion of the servo motor is realized to output rotary motion to the output shaft 18 of the planet carrier through the shaft 41 with less teeth number. The few-tooth shaft 41 is the head end part for the input of the rotary motion, and the planet carrier output shaft 18 is the tail end part for the output of the rotary motion. The reducer realizes the speed reduction movement with the speed reduction ratio of 6000-12000, and meets the requirement of processing the helical angle of the helical gear of 0-45 degrees.
As shown in figure 1, the utility model uses the processing modulus mn=2mm, number of teeth 28, pitch angleβ n=20.3 °, coefficient of variation XnAn internal-tooth helical cylindrical gear with the thickness of 30mm and the value of =0.315 is taken as an example to illustrate the implementation process of relevant parameters:
(1) parameters associated with a primary planetary gear reducer
(1-1) the first stage planetary gear reducer is composed of a shaft 6-tooth gear with 41 small teeth, a planetary gear 34, a gear 36 and a gear 26 with 15 teeth on the upper part of the upper shell.
(1-2) the second stage planetary gear reducer is composed of a 72 first stage central duplicate gear 7-tooth gear, a 26 upper shell lower part 37-tooth gear and a planetary gear 15-tooth gear.
The transmission ratio of the primary planetary gear reducer is 81.51.
(2) Parameters relating to two-stage planetary gear speed reducer
(2-1) the first stage planetary gear reducer is formed into a planetary mechanism by the displacement of a third stage gear shaft 19 gear 52, a duplicate gear 59, an upper 38 gear and a 23 internal gear 92 gear.
(2-2) the second stage planetary gear reducer is formed into a planetary mechanism by shifting a 59 duplex gear lower-link 33-tooth gear and an 18 planet carrier output shaft 92-tooth gear.
The gear ratio of the secondary planetary gear reduction is 122.667.
The overall gear ratio of the primary planetary gear reducer to the secondary planetary gear reducer is 9999, thereby achieving 0.028055556 degrees per second of rotational motion.
(3) The hydraulic pressure of the linear motion speed realizes the linear motion speed: the linear motion speed of the electrolysis motion driving shaft is controlled to be 2.5mm/min by the hydraulic element 1.
In the rotating motion with the linear motion speed of the electrolysis motion driving shaft of 2.5mm/min and 0.028055556 degrees/second, a modulus m can be completed within 12 minutesn=2mm, number of teeth 28, pitch angleβ n=20.3 °, coefficient of variation XnAnd (4) machining the internal-tooth helical cylindrical gear with the thickness of 30mm and the thickness of 0.315.
Claims (10)
1. The utility model provides a skewed tooth internal gear electrolytic machining telecontrol equipment of little reference circle diameter, includes servo motor, its characterized in that: the processing motion device consists of a rotary motion device and a linear motion device;
the rotary motion device is composed of a primary planetary gear reducer and a secondary planetary gear reducer;
the primary planetary gear reducer is formed by connecting an upper shell (26), a bridge (27), a secondary planetary gear (28), a needle bearing (35), a gear carrier (36), a hollow gear shaft (37), a few-tooth-number shaft (41), an upper end cover (45), a primary planetary gear (34), a primary duplicate gear (72) and a middle connecting shell (74); upper end cover (45) set up go up the top of casing (26), and the top of few number of teeth axle (41) is connected with servo motor's pivot through parallel key (42), few number of teeth axle (41) set up go up the inside of casing (26), the upper end and the lower extreme of going up casing (26) inner wall all are equipped with the internal tooth, and are a plurality of first order planetary gear (34) respectively with the external tooth of few number of teeth axle (41) and the internal tooth meshing of last casing (26) inner wall upper end are connected, carrier (36) set up the terminal surface outside of first order planetary gear (34), every first order planetary gear (34) all form axial fixed connection through hollow gear axle (37) and carrier (36), the upper portion of first order duplicate gear (72) with the below meshing of carrier (36) is connected, and a plurality of second level planetary gear (28) respectively with the lower duplicate gear of first order duplicate gear (72), The inner teeth below the inner wall of the upper shell (26) are meshed and connected, a bridge (27) is arranged outside the end face of each second-stage planetary gear (28), a shaft sleeve (30) is arranged at the center of each second-stage planetary gear (28), the bridge (27) is axially fixedly connected with each second-stage planetary gear (28) through the shaft sleeves (30), the bottom of the bridge (27) is rotatably connected to the center of the middle connecting shell (74), the upper end of the less-tooth-number shaft (41) is connected and arranged in a central hole of the upper end cover (45), and the lower end of the less-tooth-number shaft (41) is connected and arranged in a central hole above the bridge (27);
the secondary planetary gear reducer is formed by connecting a middle shell (17), a planet carrier output shaft (18), a planet carrier (20), a third gear shaft (52), a gear shaft (53), a third cylindrical positioning pin (54), a second-stage duplicate gear (59) and a middle connecting shell (74); the middle shell (17) is connected and arranged below the middle connecting shell (74), an inner gear (23) is arranged on the inner wall of the middle connecting shell (74), the inner gear (23) is fixedly connected with the middle connecting shell (74) through a first cylindrical positioning pin (22), the planet carrier output shaft (18) is arranged at the center of the middle shell (17), the third gear shaft (52) is rotatably arranged between the center of the upper end of the planet carrier output shaft (18) and the center of the lower end of the middle connecting shell (74), the upper end of the third gear shaft (52) is connected with the lower end of the bridge (27) in a clamping manner, an upper coupling gear of the second-stage duplicate gear (59) is respectively connected with the third gear shaft (52) and the inner gear (23) in a meshing manner, and a planet carrier (20) is arranged on the outer side of the end face of the second-stage duplicate gear (59), a gear shaft (53) is arranged in the center of the second-stage duplicate gear (59), the gear shaft (53) is fixedly connected with the second-stage duplicate gear (59) through a cylindrical positioning pin, inner teeth are arranged on the inner side of the top of the planet carrier output shaft (18), a lower-link gear of the second-stage duplicate gear (59) is meshed with the inner teeth on the top of the planet carrier output shaft (18), and the planet carrier output shaft (18) is driven by the second-stage duplicate gear (59) to complete high-reduction-ratio rotary motion;
the linear motion device is formed by connecting an electrolysis motion driving shaft (1), a guide cover (2), a lower end cover (6), a first thrust ball bearing (7), a positioning cylindrical pin (8), a sealing ring (9), a sealing ring (10), a guide sleeve (13), a guide locking nut (14), a guide return spring (15), a middle shell (17) and a planet carrier output shaft (18);
the electrolytic cell comprises a middle shell (17), a planet carrier output shaft (18) and a guide sleeve (13) are arranged in the middle shell (17) in a rotating mode, the guide sleeve (13) is arranged between the outer wall of the planet carrier output shaft (18) and the inner wall of the middle shell (17), a guide cover (2) is arranged at the bottom of the guide sleeve (13), the guide cover (2) is fixedly connected with the guide sleeve (13) through bolts, the guide sleeve (13) is fixedly connected with the planet carrier output shaft (18) through a guide locking nut (14), a lower end cover (6) is arranged on the periphery of the guide cover (2), the lower end cover (6) is fixedly connected with the bottom surface of the middle shell (17) through bolts, a cavity is arranged in the planet carrier output shaft (18), an inlet pressure oil port (64) and an outlet pressure oil port (64) are formed in the wall of the cavity, and an, be equipped with sealing ring (9), sealing washer (10) and direction reset spring (15) between electrolysis motion drive shaft (1) and planet carrier output shaft (18), oil pressure overcomes direction reset spring (15) pressure and makes electrolysis motion drive shaft (1) downstream under the direction of direction lid (2) during the oil feed, makes electrolysis motion drive shaft (1) upstream under the effect of direction reset spring (15) during the oil extraction, connect the installation electrolysis cutter on the bottom spindle nose of electrolysis motion drive shaft (1), accomplish the electrolytic machining of little pitch circle diameter skewed tooth internal gear through linear motion and rotary motion's combined action.
2. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the inner hole at the lower end of the planet carrier output shaft (18) and the inner hole of the electrolysis motion driving shaft (1) form a hydraulic cylinder, a sealing ring positioning ring (11) is arranged on the inner hole wall of the planet carrier output shaft (18), an O-shaped sealing ring (12) is arranged in the sealing ring positioning ring (11), the shifting-out section of the electrolysis motion driving shaft (1) is in a waist drum shape, a guide hole in the guide cover (2) is also in a waist drum-shaped hole matched with the electrolysis motion driving shaft (1), and the electrolysis motion driving shaft (1) and the guide hole form sliding clearance fit.
3. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the center hole of the upper end cover (45) and the center hole of the bridge frame (27) are coaxially arranged, first angular contact ball bearings (40) are arranged in the center hole of the upper end cover and the center hole of the bridge frame, and a few-tooth shaft (41) forms supporting positioning through the first angular contact ball bearings (40) and rotates between the upper end cover (45) and the bridge frame (27).
4. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the number of the first-stage planetary gears (34) and the number of the second-stage planetary gears (28) are 3-4.
5. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the hollow gear shaft (37) penetrates through holes of the first-stage planetary gear (34) and the gear carrier (36), a needle bearing (35) is arranged between the hollow gear shaft (37) and the first-stage planetary gear (34), and the upper end of the hollow gear shaft (37) is axially positioned through a shaft position gasket (38) and a shaft clamping ring (39).
6. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the joint of the bridge (27) and the third-stage gear shaft (52) is in clamping fit with the convex block and the groove.
7. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the second-stage planetary gear (28) is sleeved on the shaft sleeve (30) in an empty mode, and the shaft sleeve (30) is installed on the bridge (27) through the bolt (31) and then locked through the first flat washer (32), the first light spring washer (33) and the nut (73).
8. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the second-stage duplicate gear (59) is arranged on the gear shaft (53), and the gear shaft (53) and the second-stage duplicate gear (59) have a common angular speed through a third cylindrical positioning pin (54); the gear shaft (53) is supported on the planetary carrier (20) by 2 second angular contact ball bearings (60), and the axial position is restricted by shaft collars (55) at both ends thereof.
9. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: go up the hole of casing (26) and have 2 internal gear cylindrical gear pairs, the addendum circle diameter of internal gear is big-end-up's setting, intermediate junction casing (74) and last casing (26) are through the tang location, guarantee to be concentric, through second cylinder locating pin (25) restriction angular rotation, go up casing (26) and upper end cover (45) and pass through the tang location, guarantee to be concentric, through fourth cylinder locating pin (75) restriction angular rotation, through screw (46), the flat packing ring of second (47), the fastening of casing (26) and upper end cover (45) will be gone up in second light spring packing ring (48).
10. The small pitch diameter helical gear electrochemical machining motion device of claim 1, wherein: the intermediate connecting shell (74) is connected with the intermediate shell (17) through a spigot, and the intermediate connecting shell (74) and the intermediate shell (17) cannot rotate through the positioning pin (21); the middle connecting shell (74) is matched with the internal gear (23) through a shaft hole to ensure that the middle connecting shell (74) and the internal gear (23) are concentric, and the angular rotation is limited through the first cylindrical positioning pin (22); the intermediate connecting shell (74) is also a mounting positioning piece of a pair of second thrust ball bearings (19) which are arranged back to back; the middle connecting shell (74) and the upper shell (26) are positioned through the seam allowance, concentricity is guaranteed, and angular rotation is limited through the second cylindrical positioning pin (25).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921367047.6U CN210548651U (en) | 2019-08-21 | 2019-08-21 | Bevel gear internal gear electrolytic machining movement device with small reference circle diameter |
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| CN201921367047.6U CN210548651U (en) | 2019-08-21 | 2019-08-21 | Bevel gear internal gear electrolytic machining movement device with small reference circle diameter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449674A (en) * | 2019-08-21 | 2019-11-15 | 扬州工业职业技术学院 | A kind of helical teeth internal gear Electrolyzed Processing telecontrol equipment of small reference diameter |
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2019
- 2019-08-21 CN CN201921367047.6U patent/CN210548651U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449674A (en) * | 2019-08-21 | 2019-11-15 | 扬州工业职业技术学院 | A kind of helical teeth internal gear Electrolyzed Processing telecontrol equipment of small reference diameter |
| CN110449674B (en) * | 2019-08-21 | 2024-07-26 | 扬州工业职业技术学院 | Bevel gear electrolytic machining movement device with small reference circle diameter |
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