CN215720614U

CN215720614U - Special gear motor structure for servo press

Info

Publication number: CN215720614U
Application number: CN202122127873.7U
Authority: CN
Inventors: 何彦忠
Original assignee: Suzhou Best Intelligent Technology Co ltd
Current assignee: Suzhou Best Intelligent Technology Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-02-01
Anticipated expiration: 2031-09-03

Abstract

The utility model provides a special speed reducing motor structure for a servo press, which comprises a machine body, a crankshaft, a large gear box body, a gear shaft, a planetary gear box and a servo motor, wherein the crankshaft is arranged in the machine body, one end of the crankshaft is connected with the large gear arranged in the large gear box body, the planetary gear box and the servo motor are integrated together and share a supporting bearing, oil immersion is arranged in the large gear box body, and the gear box can be cooled through a large gear oil tank without an independent cooling system; one end of the gear shaft is in transmission connection with the planetary gear box, and the other end of the gear shaft is meshed with the large gear. The planetary gear box and the low-speed high-torque servo motor are integrated and designed, and share the main transmission bearing, so that the cost is reduced, the structural size is reduced, and the processing and assembling difficulty of an equipment manufacturer is greatly reduced; the gear box is embedded in the large gear box body, and the installation gear is shortened, so that the structural arrangement and the coordination of the whole machine tool are not influenced.

Description

Special gear motor structure for servo press

Technical Field

The utility model relates to the technical field of presses, in particular to a speed reduction motor structure special for a servo press.

Background

The main trend of future development of the metal plastic forming industry is light weight, energy saving, high stability and high productivity, the matched stamping equipment is also developed towards the trends of precision, high speed, systematization, various small-amount flexible production, rapid die change, material saving, easy maintenance and energy saving, and medium-high grade mechanical presses represented by intelligent numerical control and servo drive presses are met with unprecedented development opportunities. According to the data of the forging and pressing association, the proportion of the current domestic servo mechanical press in the whole mechanical press is approximately within 3 percent, the servo trend is obvious, and the market space is huge. According to the data prediction of the industry association, the domestic sales income of the mechanical press in China reaches 750 hundred million by 2025, at the moment, the conservative estimation of the servo mechanical press accounts for 30 percent of the proportion, and the market scale of the servo press is expected to reach nearly 300 million. Therefore, more and more manufacturers adopt a self-adaptive control technology, utilize a servo motor to drive a crank sliding block mechanism, and control the rotating speed of the servo motor through a computer, so that the position of a sliding block relative to the rotating angle of the motor can be accurately controlled, the position and the speed of a press punch hammer are further accurately controlled, and the requirement of a production and processing technology on the speed characteristic of the punch hammer is met. The servo press machine can obtain great social benefit and economic benefit in actual production, and fully embodies advanced ideas of energy conservation and noise reduction in green manufacturing. In the main transmission structure of the servo press, the large gear and the gear shaft are lubricated by oil immersion, and the gear shaft is arranged in the gear oil tank, so the connecting part of the gear shaft and the servo motor is required to be a sealing structure, the servo motor is required to be reliably and gaplessly connected in the installation process, the disassembly process is convenient, and the follow-up maintenance and repair are convenient, so the reasonable installation structure of the servo motor is very critical. In addition, in order to increase the output force of the press machine under the condition that the torque of the motor is not changed, the gear transmission ratio needs to be increased, the motion mode of the servo press machine is a motion mode of frequently switching forward and reverse rotation and acceleration and deceleration, so that the gear transmission needs higher precision to meet the dynamic response precision, and the design of the added gear box is very important.

The defects and shortcomings of the prior art are as follows:

in the prior art, in order to increase the output force of the press, the following four solutions are provided, but all have the defects and shortcomings, and the following solutions are analyzed one by one.

1. In the first existing scheme, in order to increase the output force of the press machine, the simplest mode is to increase the output torque of a servo motor. The disadvantages are that: on one hand, the increase of the torque of the servo motor can increase the size of the servo motor, which may cause the problem of unmatching with the installation size of the machine tool, on the other hand, the cost of the servo motor is almost in direct proportion to the output torque, so that the manufacturing cost of the pressure machine tool is undoubtedly increased, and the pressure machine tool does not have good economy and market popularization;

2. in the second existing scheme, two or more small-torque servo motors are used for driving the same set of transmission mechanism in order to increase the output force of the press machine. The disadvantages are that: two or more sets of driving systems and synchronous control systems are needed, the difficulty of the control systems is increased, the motion precision and noise of the whole machine tool can be influenced by the synchronous control precision of the motors and the consistency precision of the transmission gaps of two or more pairs of gears, and the transmission precision and reliability are reduced. A group of transmission systems are added, the consistency precision needs to be ensured, the manufacturing difficulty of the machine tool is increased, and the machine tool is difficult to popularize on machine tools produced in batches;

3. in the third existing scheme, for increasing the output force of the press, the total transmission ratio is increased by increasing the transmission of a one-level common straight gear, and the final torque output is improved to improve the force output of the press. The disadvantages are that: due to the added common straight gear transmission, the transmission precision is low, and the high dynamic response precision cannot be met. The straight gear transmission meshing degree is low, and the linear speed allowable value is low, so that the input rotating speed of the motor is limited and cannot be too high, and the production efficiency of the whole machine is low.

4. According to the fourth existing scheme, for increasing the output force of the press machine, the total transmission ratio is increased by adding the first-stage planetary gear box, and the final torque output is improved to improve the force output of the press machine. The disadvantages are that: due to the fact that the planetary gear box is added, a machine tool transmission system is lengthened, the size of the pressure machine tool in the front-back direction is enlarged, structural arrangement and whole machine harmony of the machine tool are affected, in addition, the thermal power of the gear box is limited, an independent cooling system is needed, and the cost is increased.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: in order to overcome the defects in the prior art, the utility model provides a special speed reducing motor structure for a servo press.

The technical scheme adopted for solving the technical problems is as follows: a special speed reducing motor structure for a servo press comprises a machine body, a crankshaft, a large gear box body, a gear shaft, a planetary gear box and a servo motor, wherein the crankshaft is arranged in the machine body, one end of the crankshaft is connected with the large gear arranged in the large gear box body, the planetary gear box and the servo motor are integrated together and share a main transmission bearing as a support, and the structural size is shortened; and the immersion oil is arranged in the big gear box body, one end of the gear shaft is in transmission connection with the planetary gear box, and the other end of the gear shaft is meshed with the big gear.

Further, servo motor includes motor casing to and motor stator, electric motor rotor, motor bearing frame, motor bearing and the motor shaft of setting in motor casing, electric motor rotor sets up in the outside of motor shaft, and motor stator sets up in the electric motor rotor outside, motor shaft one end is extended motor casing and tip and is installed encoder and stopper, and the motor shaft other end is the output, the motor bearing sets up on the output of motor shaft, and the motor bearing passes through the motor bearing frame and is connected with motor casing, the motor output is extended and is equipped with the external splines of being connected with planetary gear's sun gear on the tip of motor bearing.

Furthermore, the planetary gear box comprises a gear box bearing seat, an outer gear ring, a planetary gear, a gear box bearing, a planetary gear support and a sun gear, wherein the sun gear is positioned on one side of the motor bearing, which is far away from the motor rotor, the sun gear is provided with an inner spline, the sun gear is fixedly arranged on a motor shaft through the inner spline and the outer spline, the outer gear ring is fixedly arranged on the motor bearing seat through positioning, the planetary gear is arranged on the planetary gear support, the outer side of the planetary gear is meshed with the outer gear ring, and the inner side of the planetary gear is meshed with the sun gear; a gear box bearing is arranged at one end of the planet wheel support far away from the planet wheel, the gear box bearing is connected with the outer gear ring through a gear box bearing seat, and the gear box bearing seat and the outer gear ring are installed in a positioning mode; the planet wheel support is provided with a locking sleeve at one end extending out of the gear box bearing, and the gear shaft penetrates through a center hole of the planet wheel support and is tightly held and fixed on the gear shaft through the locking sleeve.

Specifically, because the gear shaft and the planet wheel support are locked through the locking sleeve, the gear shaft is in interference connection with the center hole of the planet wheel support, and therefore transmission stability and transmission precision are guaranteed.

Specifically, the motor bearing is a main transmission bearing.

Because integrated planetary gear case and servo motor together are integral erection in the gear box body, in order to guarantee the leakproofness, avoid the oil leakage of each other between planetary gear case and servo motor and the gear box body, further, be equipped with first sealing washer between the connection terminal surface of gear box bearing frame and outer ring gear, be equipped with the second sealing washer between the connection terminal surface of outer ring gear and motor bearing frame, all be equipped with the third sealing washer between the connection terminal surface of motor bearing frame and motor casing.

Further, the outer fringe of motor bearing frame is equipped with mounting flange, be equipped with the fourth sealing washer between mounting flange and the organism, prevent the oil leak.

Furthermore, in order to avoid the mutual cluster of oil between gear wheel box and the planetary gear case, the both sides face of gear case bearing all is equipped with first bearing end cover, be equipped with between the face of being connected of first bearing end cover and planet wheel support and keep off the oil groove.

Furthermore, two side faces of the motor bearing are respectively provided with a second bearing end cover, a fifth sealing ring is arranged between the motor bearing and the connecting face of the second bearing end cover close to one side of the servo motor, a framework sliding sealing ring is arranged between the second bearing end cover close to one side of the servo motor and the connecting face of the motor shaft and the motor bearing, and an oil blocking groove is arranged between the second bearing end cover outside the framework sliding sealing ring and the connecting face of the motor shaft; an oil retaining groove is arranged between the second bearing end cover close to one side of the planetary gear box and the connecting surface of the motor shaft.

The transmission principle is as follows: the end part of the servo motor shaft is provided with an external spline, the sun gear of the planetary gear box is provided with an internal spline, the sun gear is arranged on the motor shaft through the internal spline and the external spline, and the internal spline and the external spline are connected in a conventional connection mode; the design of motor shaft output end has the motor bearing to support, and the motor bearing passes through motor bearing frame fixed mounting on the stator shell of motor, the outer ring gear of planetary gear box passes through the location installation to be fixed on the motor bearing frame, the planet wheel passes through the support and fixes, the planet wheel support is provided with the gear box bearing, gear box bearing frame and outer ring gear location installation, be provided with the lock sleeve on the planet wheel support, the gear shaft passes planet wheel support centre bore, it is fixed tightly to hold tightly through the lock sleeve, the gear shaft just is connected with the transmission of planet wheel and just fixed like this, the gear shaft drives the gear wheel, the gear wheel drives the bent axle rotation, accomplish the transmission process of whole power.

The utility model has the beneficial effects that: according to the speed reducing motor structure special for the servo press, the planetary gear box and the low-speed large-torque servo motor are integrated and designed, the main transmission bearing is shared, the cost is reduced, the structural size is reduced, the standard servo motor used by the existing small-tonnage press can be directly installed on the large-tonnage press, and the output requirement of the press is met. In addition, the gear box and the servo motor are integrated, so that the processing and assembling difficulty of an equipment manufacturing factory is greatly reduced, the gear box is suitable for batch production, the gear box is installed in the conventional large gear box body and is installed in an oil immersion manner, the gear box can be cooled through a large gear oil tank, and an independent cooling system is not needed. The gear box is embedded in the large gear box body, so that the installation gear is shortened, and the structural arrangement and the coordination of the whole machine tool are not influenced. Because the gear shaft and the planet wheel support are in interference connection, no gap exists, the dynamic response precision after connection is not influenced, and the control precision of positive and negative rotation and acceleration and deceleration of the servo motor is high; the gear shaft can be detached and maintained respectively or the brake and the servo motor can be replaced and maintained respectively and repeatedly in the follow-up process, and convenience and feasible solutions are provided for follow-up maintenance.

Drawings

The utility model is further illustrated by the following figures and examples.

Fig. 1 is a schematic structural diagram of a speed reduction motor structure special for a servo press.

Fig. 2 is an enlarged schematic view of the planetary gear box and the servo motor in fig. 1.

Fig. 3 is a schematic diagram of the position of the seal ring.

Fig. 4 is an enlarged schematic view of a structure at a in fig. 2.

Fig. 5 is an enlarged schematic view of B in fig. 2.

In the figure: 1. the engine body, 2, a crankshaft, 3, a gearwheel, 4, a planetary gear box, 401, a gear box bearing seat, 402, an outer gear ring, 403, a planetary gear, 404, a gear box bearing, 405, a planetary gear support, 406, a sun gear, 407, a first bearing end cover, 5, a servo motor, 501, a motor stator, 502, a motor rotor, 503, a motor bearing seat, 504, a motor bearing, 505, a motor shaft, 506, a motor shell, 507, a second bearing end cover, 6, an encoder, 7, a brake, 8, a locking sleeve, 9, a gear shaft, 10, a gearwheel box body, 11, a first sealing ring, 12, a second sealing ring, 13, a third sealing ring, 14, a fourth sealing ring, 15, a mounting flange, 16, a fifth sealing ring, 17, a framework sliding sealing ring, 18 and an oil blocking groove.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1 and 2, the speed reduction motor structure special for the servo press comprises a machine body 1, a crankshaft 2, a gearwheel 3, a gearwheel box 10, a gear shaft 9, a planetary gear box 4 and a servo motor 5, wherein the crankshaft 2 is arranged inside the machine body 1, one end of the crankshaft 2 is connected with the gearwheel 3 arranged in the gearwheel box 10, the planetary gear box 4 and the servo motor 5 are integrated together and share a main transmission bearing as a support, and the structure size is shortened; and the immersion oil is installed in a bull gear box body 10, one end of a gear shaft 9 is in transmission connection with a planetary gear box 4, the other end of the gear shaft is meshed with a bull gear 3, the bull gear box body 10 is arranged on one side of the machine body 1, and the bull gear 3, the planetary gear box 4 and a servo motor 5 are all arranged inside the bull gear box body 10.

The servo motor 5 comprises a motor housing 506, and a motor stator 501, a motor rotor 502, a motor bearing seat 503, a motor bearing 504 and a motor shaft 505 which are arranged in the motor housing 506, wherein the motor rotor 502 is arranged on the outer side of the motor shaft 505, the motor stator 501 is arranged on the outer side of the motor rotor 502, and the servo motor 5 is an inner rotor motor; one end of the motor shaft 505 extends out of the motor housing 506, the end of the motor shaft is provided with the encoder 6 and the brake 7, the other end of the motor shaft 505 is an output end, the motor bearing 504 is arranged at the output end of the motor shaft 505, the motor bearing 504 is connected with the motor housing 506 through the motor bearing seat 503, and the end of the motor output end extending out of the motor bearing 504 is provided with an external spline connected with the sun gear 406 of the planetary gear box 4.

The planetary gearbox 4 comprises a gearbox bearing seat 401, an outer gear ring 402, planet wheels 403, a gearbox bearing 404, a planet wheel support 405 and a sun wheel 406, wherein the sun wheel 406 is positioned on one side of a motor bearing 504 away from a motor rotor 502, the sun wheel 406 is provided with an internal spline, the sun wheel 406 is fixedly arranged on a motor shaft 505 through the internal spline and the external spline, the outer gear ring 402 is fixedly arranged on a motor bearing seat 503 through positioning, the planet wheels 403 are arranged on the planet wheel support 405, the outer sides of the planet wheels 403 are meshed with the outer gear ring 402, and the inner sides of the planet wheels 403 are meshed with the sun wheel 406; a gearbox bearing 404 is arranged at one end of the planet wheel bracket 405 far away from the planet wheel 403, the gearbox bearing 404 is connected with the outer gear ring 402 through a gearbox bearing seat 401, and the gearbox bearing seat 401 and the outer gear ring 402 are positioned and installed; one end that planet wheel support 405 extends gearbox bearing 404 is equipped with lock sleeve 8, gear shaft 9 passes planet wheel support 405 centre bore, holds tightly through lock sleeve 8 and fixes on gear shaft 9, realizes gear shaft 9 and planet wheel support 405 centre bore interference fit and is connected to driven stability has been guaranteed to and transmission precision.

As shown in fig. 3, the planetary gear box 4 and the servo motor 5 integrated together are integrally installed in the gear box body 10, in order to ensure the sealing performance and prevent the oil between the planetary gear box 4 and the servo motor 5 and the gear box body 10 from being mixed with each other, a first sealing ring 11 is arranged between the connection end surfaces of the gear box bearing seat 401 and the outer gear ring 402, a second sealing ring 12 is arranged between the connection end surfaces of the outer gear ring 402 and the motor bearing seat 503, and third sealing rings 13 are arranged between the connection end surfaces of the motor bearing seat 503 and the motor housing 506. The outer fringe of motor bearing frame 503 is equipped with mounting flange 15, be equipped with fourth sealing washer 14 between mounting flange 15 and the organism 1, prevent the oil leak.

In order to prevent oil mixing, except that the sealing ring is arranged between the connecting end faces, oil blocking grooves are arranged at the contact positions of the rest bearing pressing covers and the shaft, and the oil blocking grooves are specifically as follows:

as shown in fig. 4, both side surfaces of the gear box bearing 404 are provided with first bearing end caps 407, and an oil retaining groove 18 is provided between the connection surfaces of the first bearing end caps 407 and the planet carrier 405.

As shown in fig. 5, two side surfaces of the motor bearing 504 are both provided with a second bearing end cover 507, a fifth sealing ring 16 is arranged between the motor bearing 504 and the connecting surface of the second bearing end cover 507 near one side of the servo motor 5, a skeleton sliding sealing ring 17 is arranged between the second bearing end cover 507 near one side of the servo motor 5 and the connecting surface of the motor shaft 505 and the motor bearing 504, and an oil blocking groove 18 is arranged between the second bearing end cover 507 outside the skeleton sliding sealing ring 17 and the connecting surface of the motor shaft 505; an oil baffle groove 18 is arranged between the connecting surface of the second bearing end cover 507 and the motor shaft 505 at one side close to the planetary gear box 4.

In light of the foregoing description of preferred embodiments in accordance with the utility model, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a special gear motor structure of servo press which characterized in that: including organism, bent axle, gear wheel, big gear box body, gear shaft, planetary gear case and servo motor, wherein, the bent axle sets up inside the organism, and bent axle one end and the gear wheel connection of setting in the big gear box body, planetary gear case and servo motor are integrated together and share support bearing, and the immersion oil installs in the big gear box body, gear shaft one end is connected with the planetary gear case transmission, the other end and gear engagement.

2. The structure of the special gear motor for the servo press as claimed in claim 1, wherein: the servo motor comprises a motor shell, a motor stator, a motor rotor, a motor bearing seat, a motor bearing and a motor shaft, wherein the motor stator, the motor rotor, the motor bearing seat, the motor bearing and the motor shaft are arranged in the motor shell, the motor rotor is arranged on the outer side of the motor shaft, the motor stator is arranged on the outer side of the motor rotor, one end of the motor shaft extends out of the motor shell and the end of the motor shaft is provided with an encoder and a brake, the other end of the motor shaft is an output end, the motor bearing is arranged at the output end of the motor shaft, the motor bearing is connected with the motor shell through the motor bearing seat, and the end of the motor output end, which extends out of the motor bearing, is provided with an external spline connected with a sun gear of the planetary gear box.

3. The structure of the special gear motor for the servo press as claimed in claim 2, wherein: the planetary gear box comprises a gear box bearing seat, an outer gear ring, a planetary gear, a gear box bearing, a planetary gear support and a sun gear, wherein the sun gear is provided with an inner spline, the sun gear is fixedly arranged on a motor shaft through the inner spline and the outer spline, the outer gear ring is fixedly arranged on the motor bearing seat through positioning, the planetary gear is arranged on the planetary gear support, the outer side of the planetary gear is meshed with the outer gear ring, and the inner side of the planetary gear is meshed with the sun gear; a gear box bearing is arranged at one end of the planet wheel support far away from the planet wheel, the gear box bearing is connected with the outer gear ring through a gear box bearing seat, and the gear box bearing seat and the outer gear ring are installed in a positioning mode; the planet wheel support is provided with a locking sleeve at one end extending out of the gear box bearing, and the gear shaft penetrates through a center hole of the planet wheel support and is tightly held and fixed on the gear shaft through the locking sleeve.

4. The structure of the special gear motor for the servo press as claimed in claim 3, wherein: the gear shaft is in interference connection with a central hole of the planet wheel support.

5. The structure of the special gear motor for the servo press as claimed in claim 4, wherein: the motor bearing is a main transmission bearing.

6. The structure of the special gear motor for the servo press as claimed in claim 3, wherein: the gear box is characterized in that a first sealing ring is arranged between the connecting end faces of the gear box bearing seat and the outer gear ring, a second sealing ring is arranged between the connecting end faces of the outer gear ring and the motor bearing seat, and third sealing rings are arranged between the connecting end faces of the motor bearing seat and the motor shell.

7. The structure of the special gear motor for the servo press as claimed in claim 3, wherein: the outer edge of the motor bearing seat is provided with a mounting flange, and a fourth sealing ring is arranged between the mounting flange and the machine body.

8. The structure of the special gear motor for the servo press as claimed in claim 3, wherein: and two side surfaces of the gear box bearing are respectively provided with a first bearing end cover, and an oil blocking groove is arranged between the first bearing end cover and the connecting surface of the planet wheel support.

9. The structure of the special gear motor for the servo press as claimed in claim 3, wherein: two side faces of the motor bearing are respectively provided with a second bearing end cover, a fifth sealing ring is arranged between the motor bearing and the connecting face of the second bearing end cover close to one side of the servo motor, a skeleton sliding sealing ring is arranged between the second bearing end cover close to one side of the servo motor and the connecting face of the motor shaft and the motor bearing, and an oil blocking groove is arranged between the second bearing end cover outside the skeleton sliding sealing ring and the connecting face of the motor shaft; an oil retaining groove is arranged between the second bearing end cover close to one side of the planetary gear box and the connecting surface of the motor shaft.