CN111570572A - Transmission structure and all-electric servo direct-drive bending machine comprising same - Google Patents
Transmission structure and all-electric servo direct-drive bending machine comprising same Download PDFInfo
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- CN111570572A CN111570572A CN202010545162.9A CN202010545162A CN111570572A CN 111570572 A CN111570572 A CN 111570572A CN 202010545162 A CN202010545162 A CN 202010545162A CN 111570572 A CN111570572 A CN 111570572A
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- crank
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- transmission structure
- fixedly connected
- wheel
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 238000005452 bending Methods 0.000 title claims abstract description 25
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 230000002146 bilateral effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
- B21D5/0209—Tools therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/26—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by cams, eccentrics, or cranks
- B30B1/266—Drive systems for the cam, eccentric or crank axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The invention discloses a transmission structure and a full-electric servo direct-drive bending machine comprising the same. The transmission structure comprises a crankshaft, a crank and a connecting rod assembly, wherein the crank is sleeved on the crankshaft and is connected with the crankshaft in a sliding manner; the crankshaft comprises a central wheel and eccentric shafts arranged on two sides of the central wheel, the central axes of the two eccentric shafts are overlapped, and the central axes of the two eccentric shafts are parallel to the central axis of the central wheel; the crank comprises a wheel sleeve and a crank connecting part fixedly arranged on the outer wall of the wheel sleeve, and the crank connecting part is movably connected with the connecting rod assembly. The full-electric servo direct-drive bending machine comprises the transmission structure, and further comprises a speed reducer and a servo motor, wherein the speed reducer and the servo motor are used for driving the structure to rotate, one end of the speed reducer is fixedly connected with the eccentric shaft, and the other end of the speed reducer is fixedly connected with a driving shaft of the servo motor. The invention adopts a crankshaft crank transmission structure and is directly driven by the servo motor, thereby reducing transmission conversion links, reducing the noise generated in the working process of the bending machine and simultaneously improving the production efficiency.
Description
Technical Field
The invention relates to the technical field of bending machines, in particular to a transmission structure and a full-electric servo direct-drive bending machine comprising the same.
Background
The bending machine is a machine tool capable of bending and forming metal plates made of different materials, and with continuous development and innovation of technology, a main shaft driving mode of the bending machine is also subjected to hydraulic torsion shaft synchronization, electro-hydraulic servo valve control and servo pump control until the driving modes of full-electric servo heavy-load screw driving and the like in recent years.
Present full electric servo screw driven bender structure is all very similar, relies on servo motor and hold-in range drive ball screw, drives workstation up-and-down motion on the bender, because of the required output bending pressure of lead screw, its motor torque power is the inverse ratio with the rate of motion, and speed is slower more promptly, and the moment of torsion and the power of motor are big more, consequently will reduce the rate of bending when selecting suitable motor, and ball screw and hold-in range noise when the operation is very big.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a transmission structure and a full-electric servo direct-drive bending machine comprising the same, and the technical scheme of the invention is as follows: a transmission structure comprises a crankshaft, a crank and a connecting rod assembly, wherein the crank is sleeved on the crankshaft and is connected with the crankshaft in a sliding manner; the crankshaft comprises a central wheel and eccentric shafts arranged on two sides of the central wheel, the central axes of the two eccentric shafts are overlapped, and the central axes of the two eccentric shafts are parallel to the central axis of the central wheel; the crank comprises a wheel sleeve and a crank connecting part fixedly arranged on the outer wall of the wheel sleeve, and the crank connecting part is movably connected with the connecting rod assembly.
Preferably, a needle bearing is arranged between the central wheel and the wheel sleeve, an inner ring of the needle bearing is fixedly connected with the outer wall of the central wheel, and an outer ring of the needle bearing is fixedly connected with the inner wall of the wheel sleeve.
Preferably, the connecting rod assembly comprises a cylindrical connecting rod body, and one end of the connecting rod body is provided with a connecting end; the crank connecting portion middle part is equipped with the mounting groove, the mounting groove bilateral symmetry is equipped with two engaging lugs, the link inserts in the mounting groove and with two engaging lug swing joint.
Preferably, the connecting ends are provided with radial through holes, the two connecting lugs are provided with positioning holes, and the radial through holes of the connecting ends are movably connected with the positioning holes of the connecting lugs through pins.
Preferably, the two eccentric shafts are respectively sleeved with a transmission bearing and a bearing seat, and the eccentric shafts are connected with the bearing seats in a sliding manner through the transmission bearings.
Preferably, the inner ring of the transmission bearing is fixedly connected with the eccentric shaft, and the outer ring of the transmission bearing is fixedly connected with the bearing seat; the transmission bearing comprises a deep groove ball bearing and a tapered roller bearing which are sequentially arranged from the central wheel to the directions of two ends.
Preferably, the transmission structure further comprises a crank case, the crank case comprises a case shell, the front surface and the rear surface of the case shell are respectively provided with a mounting hole, the two eccentric shafts respectively penetrate through the mounting holes and are in sliding connection with the case shell through bearing seats, and the bearing seats are fixedly connected with the case shell; the lower surface of the box shell is provided with a through hole, a guide sleeve is fixedly arranged on the through hole, and the connecting rod body penetrates through the guide sleeve and is in clearance fit with the guide sleeve.
A full-electric servo direct-drive bending machine comprises the transmission structure, a machine base, an upper workbench and a lower workbench, wherein the position of the lower workbench corresponds to that of the upper workbench; the transmission structure is arranged on the base, and the base is also provided with a driving mechanism for driving the crankshaft to rotate.
Preferably, the driving mechanism comprises a servo motor and a speed reducer, one end of the speed reducer is fixedly connected with one of the eccentric shafts, and the other end of the speed reducer is fixedly connected with a driving shaft of the servo motor.
Preferably, the driving mechanism comprises a torque motor, and a driving shaft of the torque motor is fixedly connected with one end of one of the eccentric shafts.
During working, the upper workbench and the lower workbench are both provided with dies, and workpieces to be processed are arranged on the dies of the lower workbench. Starting the bending machine, operating the driving mechanism to drive the transmission structure to rotate, driving the upper workbench to move downwards by the transmission structure, and performing bending operation on the workpiece to be processed; when the upper workbench moves downwards to a preset position, the bending action is finished, then the driving mechanism runs reversely to drive the transmission structure to rotate reversely, the transmission structure drives the upper workbench to move upwards, the driving mechanism stops rotating after the upper workbench moves to the preset position, and the bent workpiece is taken out.
The full-electric servo crankshaft crank type direct-drive bending machine adopts a crankshaft crank transmission structure and is directly driven by a servo motor or a torque motor, so that the transmission conversion link is reduced, and the production efficiency of equipment is improved; compared with the traditional hydraulic and full-electric servo lead screw driven bending machine, the invention can effectively reduce the noise generated in the working process of the bending machine.
Drawings
FIG. 1 is an exploded view of the transmission of the present invention;
FIG. 2 is an enlarged view of the crank;
FIG. 3 is a schematic view of a crankcase housing construction;
FIG. 4 is a schematic structural view of the all-electric servo direct-drive bending machine of the present invention;
fig. 5 is a rear view of the upper table.
Reference numerals: 1. a crankshaft; 11. a center wheel; 12. an eccentric shaft; 2. a crank; 21. a wheel sleeve; 22. a crank connecting portion; 23. mounting grooves; 24. connecting lugs; 25. positioning holes; 3. a needle bearing; 4. a connecting rod body; 41. a connecting end; 42. a radial through hole; 43. a pin; 44. a guide sleeve; 5. a deep groove ball bearing; 6. a tapered roller bearing; 7. a bearing seat; 8. a seal ring; 9. a bearing seal cover; 10. a case body shell; 101. a cover plate; 13. a machine base; 131. a guide plate; 14. a speed reducer; 15. a servo motor; 16. a lower working table; 17. an upper working table; 171. a guide wheel.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following describes a preferred embodiment of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. 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.
As shown in fig. 1-3, a transmission structure comprises a crankshaft 1, a crank 2, a connecting rod assembly and a crank box, wherein the crankshaft 1 comprises a central wheel 11 and eccentric shafts 12 arranged at two sides of the central wheel 11, the central axes of the two eccentric shafts 12 are overlapped, and the central axes of the eccentric shafts 12 are parallel to the central axis of the central wheel 11; the crank 2 comprises a wheel sleeve 21 and a crank connecting part 22 fixedly arranged on the outer wall of the wheel sleeve 21, and the crank connecting part 22 is movably connected with the connecting rod assembly. The central wheel 11 is connected with the wheel sleeve 21 in a sliding mode through the needle bearing 3, the inner ring of the needle bearing 3 is fixedly connected with the outer wall of the central wheel 11, and the outer ring of the needle bearing 3 is fixedly connected with the inner wall of the wheel sleeve 21. The connecting rod assembly comprises a cylindrical connecting rod body 4, one end of the connecting rod body 4 is provided with a connecting end 41, and the connecting end 41 is provided with a radial through hole 42; the middle part of the crank connecting part 22 is provided with a mounting groove 23, two connecting lugs 24 with positioning holes 25 are symmetrically arranged at two sides of the mounting groove 23, the connecting end 41 is inserted into the mounting groove 23, and a pin 43 is inserted into the positioning holes 25 of the connecting lugs 24 and passes through a radial through hole 42 of the connecting end 41, so that the connecting rod assembly is movably connected with the crank 2. The two eccentric shafts 12 are sequentially sleeved with the deep groove ball bearings 5 and the tapered roller bearings 6 along the central wheel 11 towards the two ends, the inner rings of the deep groove ball bearings 5 and the tapered roller bearings 6 are fixedly connected with the outer walls of the eccentric shafts 12, and the outer rings of the deep groove ball bearings 5 and the tapered roller bearings 6 are fixedly connected with the bearing seats 7.
The crankcase comprises a casing 10, mounting holes are respectively arranged on the front surface and the rear surface of the casing 10, two eccentric shafts 12 respectively penetrate through the mounting holes and are slidably connected with the casing 10 through bearing seats 7, and the bearing seats 7 are fixedly arranged on the casing 10. In the assembling process, after the two eccentric shafts 12 respectively penetrate through the mounting holes of the box body shell 10, the bearing seat 7 is sleeved on the outer rings of the deep groove ball bearing 5 and the tapered roller bearing 6 and then is fixed on the mounting holes of the box body shell 10; secondly, the sealing ring 8 and the bearing sealing cover 9 are sequentially sleeved on the two eccentric shafts 12 and fixedly connected with the bearing seat 7, through holes are formed in the sealing ring 8 and the bearing sealing ring 9, and the diameter of each through hole is slightly larger than the outer diameter of each of the two eccentric shafts 12. The lower surface of box shell 10 is equipped with the through-hole, fixedly on the through-hole being equipped with uide bushing 44, connecting rod body 4 pass uide bushing 44 and with uide bushing 44 clearance fit, the front surface of box shell 10 and pin 43 relevant position department are equipped with the dismouting access hole, fixed mounting has apron 101 on the dismouting access hole.
As shown in fig. 4-5, the all-electric servo direct-drive bending machine with the transmission structure further comprises a base 13, a reducer 14 and a servo motor 15. The machine base 13 is fixedly provided with a lower workbench 16, and an upper workbench 17 is arranged at the position corresponding to the lower workbench 16. The back of the upper workbench 17 is fixedly provided with 4 guide wheels 171, the corresponding positions of the 4 guide wheels 171 on the base 13 are fixedly provided with 4 guide plates 131, the upper workbench 17 is connected with the guide plates 131 on the base 13 in a sliding manner through the guide wheels 171, and the upper workbench 17 is fixedly connected with the connecting rod assembly. The box body shell 10 is fixedly arranged on the base 13, one end of the speed reducer 14 is fixedly connected with one of the eccentric shafts 12, and the other end of the speed reducer is fixedly connected with a driving shaft of the servo motor 15.
In another embodiment, the reducer 14 and the servo motor 15 are replaced by a torque motor with a driving shaft directly and fixedly connected with one end of the eccentric shaft 12 under the condition that other structures are not changed.
It should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", etc. herein indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements.
Claims (10)
1. A transmission structure comprises a crankshaft, a crank and a connecting rod assembly, and is characterized in that the crank is sleeved on the crankshaft and is connected with the crankshaft in a sliding manner;
the crankshaft comprises a central wheel and eccentric shafts arranged on two sides of the central wheel, the central axes of the two eccentric shafts are overlapped, and the central axes of the two eccentric shafts are parallel to the central axis of the central wheel;
the crank comprises a wheel sleeve and a crank connecting part fixedly arranged on the outer wall of the wheel sleeve, and the crank connecting part is movably connected with the connecting rod assembly.
2. The transmission structure according to claim 1, wherein a needle bearing is arranged between the center wheel and the wheel sleeve, an inner ring of the needle bearing is fixedly connected with an outer wall of the center wheel, and an outer ring of the needle bearing is fixedly connected with an inner wall of the wheel sleeve.
3. The transmission structure according to claim 2, wherein the link assembly includes a cylindrical link body having a connecting end at one end;
the crank connecting portion middle part is equipped with the mounting groove, the mounting groove bilateral symmetry is equipped with two engaging lugs, the link insert in the mounting groove and with two engaging lug swing joint.
4. The transmission structure according to claim 3, wherein the connecting end is provided with a radial through hole, two connecting lugs are provided with positioning holes, and the radial through hole is movably connected with the positioning holes through pins.
5. The transmission structure according to any one of claims 1 to 4, wherein a transmission bearing and a bearing housing are respectively sleeved on the two eccentric shafts, and the eccentric shafts and the bearing housings are slidably connected through the transmission bearings.
6. The transmission structure according to claim 5, wherein the inner race of the transmission bearing is fixedly connected to the eccentric shaft, and the outer race of the transmission bearing is fixedly connected to the bearing housing;
the transmission bearing comprises a deep groove ball bearing and a tapered roller bearing which are sequentially arranged from the central wheel to the directions of two ends.
7. The transmission structure according to claim 6, further comprising a crank case, wherein the crank case comprises a case housing, the front and rear surfaces of the case housing are respectively provided with mounting holes, the two eccentric shafts respectively penetrate through the mounting holes and are slidably connected with the case housing through the bearing seats, and the bearing seats are fixedly connected with the case housing;
the lower surface of the box shell is provided with a through hole, a guide sleeve is fixedly arranged on the through hole, and the connecting rod body penetrates through the guide sleeve and is in clearance fit with the guide sleeve.
8. An all-electric servo direct-drive bending machine comprising the transmission structure as claimed in any one of claims 1 to 7, further comprising a base, an upper workbench and a lower workbench arranged corresponding to the upper workbench, wherein the lower workbench is fixedly arranged on the base, and the upper workbench is fixedly connected with the connecting rod assembly;
the transmission mechanism is arranged on the base, and the base is also provided with a driving mechanism for driving the crankshaft to rotate.
9. The all-electric servo direct-drive bending machine according to claim 8, wherein the driving mechanism comprises a servo motor and a reducer, one end of the reducer is fixedly connected with one of the eccentric shafts, and the other end of the reducer is fixedly connected with a driving shaft of the servo motor.
10. The full electric servo direct drive bending machine according to claim 8, wherein the driving mechanism comprises a torque motor, and a driving shaft of the torque motor is fixedly connected with one end of one of the eccentric shafts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545162.9A CN111570572A (en) | 2020-06-16 | 2020-06-16 | Transmission structure and all-electric servo direct-drive bending machine comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010545162.9A CN111570572A (en) | 2020-06-16 | 2020-06-16 | Transmission structure and all-electric servo direct-drive bending machine comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111570572A true CN111570572A (en) | 2020-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010545162.9A Pending CN111570572A (en) | 2020-06-16 | 2020-06-16 | Transmission structure and all-electric servo direct-drive bending machine comprising same |
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| CN (1) | CN111570572A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877994A (en) * | 2021-09-22 | 2022-01-04 | 深圳市合信自动化技术有限公司 | Fully-electrically-driven bending machine |
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|---|---|---|---|---|
| CN201505944U (en) * | 2009-09-10 | 2010-06-16 | 陈一峰 | Linkage line longitudinal-cutting knife driving mechanism |
| CN102423919A (en) * | 2011-11-25 | 2012-04-25 | 江苏金方圆数控机床有限公司 | Small eccentric crank connecting rod transmission mechanism with length-variable connecting rod |
| CN102950784A (en) * | 2012-11-26 | 2013-03-06 | 广东锻压机床厂有限公司 | Small eccentric crank connecting-rod transmission mechanism with variable length of punching head |
| CN103057143A (en) * | 2013-01-10 | 2013-04-24 | 江苏省徐州锻压机床厂集团有限公司 | Double-point servo press transmission mechanism |
| CN111167903A (en) * | 2020-02-03 | 2020-05-19 | 江苏扬力数控机床有限公司 | Energy-saving full-electric servo bending machine |
| CN212760465U (en) * | 2020-06-16 | 2021-03-23 | 冠壹机械设备（深圳）有限公司 | Transmission structure and all-electric servo direct-drive bending machine comprising same |
-
2020
- 2020-06-16 CN CN202010545162.9A patent/CN111570572A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201505944U (en) * | 2009-09-10 | 2010-06-16 | 陈一峰 | Linkage line longitudinal-cutting knife driving mechanism |
| CN102423919A (en) * | 2011-11-25 | 2012-04-25 | 江苏金方圆数控机床有限公司 | Small eccentric crank connecting rod transmission mechanism with length-variable connecting rod |
| CN102950784A (en) * | 2012-11-26 | 2013-03-06 | 广东锻压机床厂有限公司 | Small eccentric crank connecting-rod transmission mechanism with variable length of punching head |
| CN103057143A (en) * | 2013-01-10 | 2013-04-24 | 江苏省徐州锻压机床厂集团有限公司 | Double-point servo press transmission mechanism |
| CN111167903A (en) * | 2020-02-03 | 2020-05-19 | 江苏扬力数控机床有限公司 | Energy-saving full-electric servo bending machine |
| CN212760465U (en) * | 2020-06-16 | 2021-03-23 | 冠壹机械设备（深圳）有限公司 | Transmission structure and all-electric servo direct-drive bending machine comprising same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113877994A (en) * | 2021-09-22 | 2022-01-04 | 深圳市合信自动化技术有限公司 | Fully-electrically-driven bending machine |
| CN113877994B (en) * | 2021-09-22 | 2024-01-16 | 深圳市合信自动化技术有限公司 | All-electric-drive bending machine |
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