CN219667550U - Heavy-load electric servo power driving module and numerical control bending machine - Google Patents

Abstract

The utility model discloses a heavy-duty electric servo power driving module and a numerical control bending machine, which comprise an electric servo power input device, a connecting seat, a planetary gear transmission mechanism and a spiral transmission mechanism; the connecting seat is used for detachably positioning and mounting the heavy-load electric servo power driving module; the planetary gear transmission mechanism is arranged in the mounting seat; the electric servo power input device is arranged at the top of the connecting seat, and the output shaft of the electric servo power input device is coaxially arranged with the sun gear; the screw transmission mechanism comprises a rotating component and a lifting component which are matched with each other through a screw pair; the top of the rotating component is connected with the axle center of the planet carrier; the bottom of the lifting component is connected with lifting equipment to be driven. The heavy-load electric servo power driving module is used as an independent standard module for research, development and manufacturing, is beneficial to cost control and quality control, and is suitable for mass production. Meanwhile, the maintenance and the exchange are convenient. After the transmission part is assembled as a whole, the transmission part is directly arranged on a machine tool, so that the processing and manufacturing efficiency is greatly improved.

Description

Heavy-load electric servo power driving module and numerical control bending machine

Technical Field

The utility model relates to the field of numerical control bending, in particular to a heavy-load electric servo power driving module and a numerical control bending machine.

Background

In the field of sheet metal manufacturing, numerical control bending machines are the most important processing equipment. The bending process is the most important and complex process in the metal plate manufacturing process, and the precision, efficiency and automation degree of the bending process are all bottlenecks in the process of metal plate manufacturing.

In recent years, the requirements for energy conservation and environmental protection are increasing. The traditional hydraulic transmission bending machine obviously does not meet the requirements, and at present, the driving device of numerical control bending equipment with the weight of more than 80 tons is mainly driven by hydraulic pressure in domestic and foreign markets. The need for a mechanical all-electric servo drive is urgent. However, in the existing mechanical full-electric servo, mainly in small tonnage bending machines (30-40 tons in main stream), generally not more than 50 tons, a driving mode of driving a ball screw after a servo motor is decelerated by a synchronous belt is mostly adopted. The driving mode has the advantages that: simple structure, high mechanical transmission efficiency, high speed and high precision. However, there are also disadvantages in terms of:

1. the synchronous belt has poor bearing capacity, is not suitable for large tonnage, has the problem of elongation after long-term use, and influences the use precision.

2. The transmission part cannot realize modularization, the transmission part needs to be completed in the assembly process of the whole machine, and the transmission part has high cost and great processing and manufacturing difficulty.

3. The driving wheel and the driven wheel of the synchronous belt transmission are arranged in parallel, the shaft end of the screw rod bears larger radial force, and the bearing is easy to damage in the actual use process, so that the screw rod is damaged. And radial load is easy for the high-speed screw rod to generate resonance and abnormal sound.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide the heavy-load electric servo power driving module and the numerical control bending machine aiming at the defects of the prior art, and the heavy-load electric servo power driving module and the numerical control bending machine are researched, developed and manufactured as an independent standard module, are beneficial to cost control and quality control, and are suitable for mass production. Meanwhile, the maintenance and the exchange are convenient. After the transmission part is assembled as a whole, the transmission part is directly arranged on a machine tool, so that the processing and manufacturing efficiency is greatly improved.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a heavy-duty electric servo power driving module comprises an electric servo power input device, a connecting seat, a planetary gear transmission mechanism and a screw transmission mechanism.

The connecting seat is used for positioning and mounting the heavy-load electric servo power driving module.

The planetary gear transmission mechanism is arranged in the mounting seat and comprises a sun gear and a plurality of planetary gears arranged on the planetary carrier along the circumferential direction.

The electric servo power input device is arranged at the top of the connecting seat, and an output shaft of the electric servo power input device is coaxially arranged with the sun gear.

The screw transmission mechanism comprises a rotating component and a lifting component which are matched with each other through a screw pair; wherein the top of the rotating part is connected with the axle center of the planet carrier; the bottom of the lifting component is connected with lifting equipment to be driven.

The electric servo power input device is a servo motor or a servo motor with a speed reducing mechanism or a servo motor with a bevel gear transmission device.

The output shaft of the electric servo power input device and the sun gear are coaxially and integrally arranged.

The planetary gear transmission mechanism also comprises an outer gear ring, and each planetary gear can be meshed with the solar energy and the outer gear ring; the outer gear ring and the inner wall surface of the connecting seat are integrally arranged or separately arranged.

The spiral driving machine is a trapezoidal screw or a ball screw or a planetary roller screw; the spiral driving machine comprises a rotating part and a lifting part; when the rotating part is a nut, the lifting part is a screw rod; when the rotating member is a screw, the rotating member is a nut.

The top of the rotating component is connected with the axle center of the planet carrier through a flat key, a spline or a molded surface.

The top of the rotating component is coaxially or integrally provided with a spline shaft sleeve, and a plurality of bosses are uniformly distributed on the outer wall surface of the spline shaft sleeve along the circumferential direction; the axis of the planet carrier is provided with grooves with the number corresponding to that of the bosses; the boss is inserted in the corresponding groove, and a movable block is embedded in each groove.

The device also comprises a guide mechanism; the guide mechanism comprises a sliding block and a sliding rail; the sliding block and the lifting part of the spiral transmission mechanism are integrally designed or detachably connected; the sliding block is matched with the sliding rail through a sliding pair.

A numerical control bending machine comprises a frame, a sliding block, a bending die and two groups of heavy-load electric servo power driving modules.

The rack comprises a base and two side plates which are arranged on two sides of the base in parallel; the top of the front side of each side plate is integrally provided with a mounting connecting plate; each mounting connecting plate is provided with a limiting bearing structure.

The sliding block is in sliding connection with the front sides of the two side plates.

The bending die comprises an upper die and a lower die; the upper die is arranged at the bottom of the sliding block, and the lower die is arranged at the top of the base of the frame.

The two groups of heavy-load electric servo power driving modules are symmetrically arranged on two sides of the top of the sliding block.

Each group of heavy-load electric servo power driving modules is vertically distributed.

The connecting seats of each group of heavy-load electric servo power driving modules are all arranged on the corresponding mounting connecting plates, and the limiting bearing structure can limit the mounting seats and share bending loads; the bottom of the lifting part is connected with the sliding block.

The central axis of each group of heavy-load electric servo power driving modules coincides with the intersecting line of the plane of the corresponding side plate and the plane of the sliding block.

The limit bearing structure is a locating step surface or a locating key or at least two locating pins or flange plates positioned on two sides of the installation connecting plate.

The top of the slide block corresponding to each group of heavy-load electric servo power driving modules is integrally provided with a slide block mounting seat with a top mounting plane; an arc-shaped block is arranged right below the lifting component, and the bottom surface of the arc-shaped block is matched with the top mounting plane of the sliding block mounting seat; the top surface of the arc-shaped block is matched with the cambered surface or the spherical surface of the bottom surface of the lifting part; the right lower part of the lifting part and the arc-shaped block are connected with the sliding block mounting seat through a plurality of bolts.

The utility model has the following beneficial effects:

1. the utility model has strong bearing capacity, can realize 80 tons and more than 100 tons of full electric servo transmission, effectively controls the cost, and can realize batch production, wherein the machine tool with 80 tons to 100 tons accounts for about 50 percent of the market proportion of the numerical control bending machine.

2. Low noise and meets the requirements of energy conservation and environmental protection.

3. The load is strong, and a large load force can be generated by decelerating the planetary mechanism.

4. The heavy-load electric servo power driving module is used as an independent standard module for research and development and manufacture, is beneficial to cost control and quality control, and is suitable for mass production. Meanwhile, the maintenance and the exchange are convenient. After the transmission part is assembled as a whole, the transmission part is directly arranged on a machine tool, so that the processing and manufacturing efficiency is greatly improved. In addition, the heavy-duty electric servo power driving module is used as a standard module and can be used in the fields such as powder metallurgy equipment, servo presses, injection molding machines and the like.

5. The spiral transmission part can be directly a ball screw, so that the structure is compact, the manufacturing cost is low, the service life is long, the requirement on the use environment is low, the adaptability is stronger, and the clamping and the damage caused by the factors such as dust, thermal deformation and the like in the use environment are avoided.

6. The heavy-load electric servo power driving module can be movably connected with the sliding block, the sliding block can incline, unbalanced load is caused, and the left and right are asynchronous, so that the screw rod is not damaged.

Drawings

Fig. 1 shows a schematic structure of a heavy-duty electric servo power driving module according to the present utility model.

Fig. 2 shows a schematic structural view of a first reduction mechanism in the present utility model.

Fig. 3 shows a schematic structural view of a second reduction mechanism in the present utility model.

Fig. 4 shows a schematic structural view of a third reduction mechanism in the present utility model.

Fig. 5 shows a schematic structural view of embodiment 3 of the electric servo power input device in the present utility model.

Fig. 6 shows an enlarged schematic view of the planetary gear transmission mechanism of fig. 1.

Fig. 7 shows a schematic diagram of the movable connection structure of the rotating member and the planet carrier in the present utility model.

Fig. 8 shows a schematic structure of the carrier using the carrier bearing in the present utility model.

FIG. 9 is a schematic diagram of a screw drive mechanism according to the present utility model; wherein, the rotating component in (a) is a screw rod, and the lifting component is a nut; the rotating component in (b) is a nut, and the lifting component is a screw rod.

Fig. 10 shows a schematic structural view of a first embodiment of the guide mechanism in the present utility model.

Fig. 11 shows a schematic structural view of a second embodiment of the guide mechanism in the present utility model.

Fig. 12 shows a perspective view of a numerical control bending machine according to the present utility model.

FIG. 13 is a block diagram of five embodiments of a spacing load bearing structure of the present utility model; wherein (a) is a structural diagram of the first embodiment; (b) is a structural view of the second embodiment; (c) is an internal structural view of the third embodiment; (d) is a side view of the third embodiment; (e) is a structural diagram of a fourth embodiment; (f) is an installation schematic of the fourth embodiment; (g) is a structural view of a fifth embodiment; (h) is an installation schematic of the fifth embodiment;

fig. 14 shows an enlarged schematic view of the present utility model mounted by the cooperation of the arcuate blocks and the slider.

Fig. 15 shows a cross-sectional view of fig. 14.

FIG. 16 is a diagram showing two examples of the cooperation of an arcuate block with a slider mount; wherein, (a) is cambered surface matching; (b) spherical fitting.

The method comprises the following steps:

10. a frame; 11. a base; 12. a side plate; 13. installing a connecting plate; (see no 13)

14. A limit bearing structure; 14-1, positioning a step surface; 14-2, positioning keys; 14-3, locating pins; 14-4, a flange plate;

20. a slide block;

31. an upper die; 32. a lower die;

40. the heavy-load electric servo power driving module;

41. an electric power input device; 411. a servo motor; 412. a gear A;413. a gear B;414. an output shaft III; 415. a transition gear; 416. a belt wheel I; 417. a synchronous belt; 418. a belt wheel II; 419. an output shaft IV;

42. a connecting seat;

43. a planetary gear transmission mechanism;

431. an outer ring gear; 432. a sun gear; 433. a planet wheel; 434. a planet carrier; 435. a planet carrier bearing;

44. a movable block;

50. a screw drive mechanism; 51. a rotating member; 511. a flower-shaped shaft sleeve; 52. a lifting member; 53. a sliding block; 54. a slide rail;

55. an arc-shaped block; 551. a cambered surface; 552. a spherical surface;

56. a bolt; 561. a spring; 562. and (5) locking the nut.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

In the description of the present utility model, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present utility model. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present utility model.

As shown in fig. 1, the heavy-duty electric servo power drive module includes an electric servo power input device 41, a connection base 42, a planetary gear transmission mechanism 43, a screw transmission mechanism 50, and a guide mechanism.

The connecting seat comprises a mounting surface, and the mounting surface is preferably provided with a plurality of threaded holes and the like for detachable positioning and mounting of the heavy-load electric servo power driving module. Alternatively, the connection base may be integrally formed with an external device (e.g., a side plate of the frame).

The connecting seat can also be a split bolt installation mode such as a transition plate or a transition block and the like, and is connected into a detachable whole.

The electric servo power input device is arranged at the top of the connecting seat, and an output shaft of the electric servo power input device is coaxially arranged with the sun gear.

The electric servo power input device is a servo motor or a servo motor with a speed reducing mechanism or a servo motor with a bevel gear transmission device, etc.; in this embodiment, the following several embodiments are preferable.

Example 1

As shown in fig. 1, the electric servo power input device is a servo motor, and the output shaft of the electric servo power input device is directly coaxially arranged with a sun gear in the planetary gear transmission mechanism.

Example 2

The electric servo power input device is a servo motor with a speed reducing mechanism. Among them, the reduction mechanism preferably has the following three embodiments.

First embodiment

As shown in fig. 2, the reduction mechanism is a parallel axis gear reducer including a servo motor 411, a gear a 412, and a gear B413.

The servo motor is fixedly arranged, the output shaft end of the servo motor is connected with a gear A, a gear B is hinged with a mounting seat of the connecting seat, and the gear B is connected with the sun gear through an output shaft III 414; the gear A is meshed with the gear B through a gear pair. The parallel shaft gear transmission has the advantages of small manufacturing and processing difficulty and low cost.

Second embodiment

As shown in fig. 3, the reduction mechanism is a parallel axis gear reducer with a transition gear 415. The transition gear 415 is disposed between and meshed with gear a and gear B, respectively.

Third embodiment

As shown in fig. 4, the speed reducing mechanism is a synchronous belt speed reducer, and includes a servomotor 411, a pulley one 416, a synchronous belt 417, a pulley two 418 and an output shaft four 419.

The servo motor is fixedly arranged, the output end of the servo motor is connected with a belt wheel I, a belt wheel II is hinged with the mounting seat of the connecting seat, the belt wheel II is connected with the sun wheel through an output shaft IV, and the belt wheel I, the belt wheel II and the synchronous belt form a synchronous belt transmission mechanism.

Example 3

As shown in fig. 5, the electric servo power input device is a servo motor with a bevel gear transmission device, the servo motor is fixedly arranged on a connecting seat (also can be a transition plate, a transition block and other split bolt mounting modes are connected into a detachable whole), the output shaft end of the electric servo power input device is connected with a bevel gear I451, a bevel gear II 452 is hinged with the connecting seat, and the bevel gear II is connected with a sun gear through an output shaft II 453 (also can be integrally arranged). The first bevel gear is meshed with the second bevel gear through a gear pair. The conical gear transmission device is compact in structure, the height of the driving module is reduced, the height of the whole machine tool is reduced, and the machine tool is convenient to transport. In the utility model, the connecting seat is processed in a split mode, and then is regarded as being identical through bolts; the bevel gear and the shaft end of the driving motor are designed integrally to be identical; the second bevel gear, the second output shaft and the sun gear are integrally designed, or are assembled to be equivalent after split processing; to increase the support stiffness and stability, the addition of a hinge (e.g., bearing support) to the bevel gear and the connection base is considered equivalent.

As shown in fig. 6, the planetary gear transmission includes an outer ring gear 421, a sun gear 432, planet gears 433, and a carrier 434.

The outer gear ring is integrally or separately arranged on the connecting seat, and is preferably integrally arranged in the embodiment; the sun gear and the outer gear ring are coaxially arranged, the planet carrier is provided with a plurality of planet gears along the circumferential direction, and the axle center of the planet carrier is connected with the top of a rotating part in the spiral transmission mechanism. The sun gear, the planet gear and the outer gear ring are meshed through the gear pair in sequence.

The utility model adopts the planet carrier, the planet wheel and the sun wheel, and has the effects of reducing speed and increasing force, so that the same bending force output can be realized, a high-rotation-speed low-torque driving motor can be adopted, and the motor cost is lower. Compared with the synchronous belt for speed reduction, the noise is lower, and the transmission precision is higher, because the synchronous belt has elastic deformation; the transmission precision of the scheme can reach 0.02mm, and the transmission precision of the synchronous belt is 0.3-0.5 mm. In addition, the synchronous belt has weaker bearing, and is generally suitable for machine types below 40 tons, and the utility model is suitable for machine types above 80-100 tons.

The axis of the planet carrier and the top of the rotating part in the spiral transmission mechanism can be connected with the axis of the planet carrier through a conventional flat key, a spline or a molded surface and the like. In addition, the axle center of the planet carrier and the top of the rotating component in the spiral transmission mechanism can also be movably connected as shown in fig. 7, wherein the top of the rotating component is coaxially or integrally sleeved with a spline shaft sleeve, and a plurality of bosses are uniformly distributed on the outer wall surface of the spline shaft sleeve along the circumferential direction; the axis of the planet carrier is provided with grooves with the number corresponding to that of the bosses; the boss is inserted in the corresponding groove, and a movable block is embedded in each groove.

The movable block is preferably a flexible block, but may be a movable rigid block or the like. In this way, fatigue failure of the structure due to the coaxiality error caused by the machining and manufacturing deviation can be prevented.

Further, as shown in fig. 8, the connecting seat is preferably in a split arrangement, the output shaft of the servo motor and the sun gear are coaxially and integrally arranged, the processing and manufacturing cost is low, and the rigidity and the strength of the connection are better. Meanwhile, the outer periphery of the planet carrier is preferably connected with the inner wall of the mounting seat of the connecting seat through a planet carrier bearing 435. The planet carrier bearing is arranged, so that the support rigidity is good and the stability is good.

As shown in fig. 9, the screw transmission mechanism includes a rotating member 51 and a lifting member 52 which are engaged with each other by screw pairs; wherein the top of the rotating part is connected with the axle center of the planet carrier; the bottom of the lifting component is connected with external lifting equipment.

The screw transmission mechanism is preferably a trapezoidal screw or a ball screw or a planetary roller screw; in the utility model, the rotating component is a nut or a screw rod; the lifting component is a screw rod or a nut. The method comprises the following steps:

as shown in fig. 9 (a), the rotating member is a screw, and the lifting member is a nut.

As shown in fig. 9 (b), the rotating member is a nut, and the lifting member is a screw. The nut is hinged with the connecting seat, and the screw rod is connected with the sliding block. Preferably, but not limited to, the shaft of the servo motor and the sun gear may be hollow, so as to allow the screw rod to pass through the corresponding hollow structure during lifting. But it is also possible if the shaft of the servomotor is not hollow, as is considered equivalent.

The nut is rotated, and the advantage of lifting of the screw rod is that the structure is more compact, so that the resonance problem of the screw rod is avoided.

The guide mechanism can increase the stability of transmission, and preferably comprises the following two embodiments.

Example 1

As shown in fig. 10, the guide mechanism is preferably a straight sliding fit, including a slider 53 and a slide rail 54; the sliding block and the lifting part of the spiral transmission mechanism are integrally designed or detachably connected; the sliding block is matched with the sliding rail through a sliding pair. In this embodiment, the sliding rail is preferably a linear sliding rail, and the structure is compact.

Example 2

As shown in fig. 11, the guide mechanism is preferably cylindrical surface guide: the sliding rail is a cylindrical sleeve, and is preferably connected with the connecting seat through bolts to form a whole; the sliding block can be integrally designed as a screw transmission part and also can be connected through bolts, and is matched with the cylindrical sleeve, so that the processing and the assembly are easy.

Further, the guiding mechanism is not limited to the specific shape provided in the present case, and the known prior art such as a linear guide rail, a cylindrical guide rail, a dovetail groove guide rail, etc. are all within the scope of protection of the claims, and are regarded as equivalent replacement.

As shown in fig. 12, a numerical control bending machine includes a frame 10, a slider 20, a bending die, and two sets of heavy-duty electric servo power driving modules 40.

The frame comprises a base 11 and two side plates 12 which are arranged on two sides of the base in parallel.

The sliding block is in sliding connection with the front sides of the two side plates.

The bending die comprises an upper die 31 and a lower die 32; the upper die is arranged at the bottom of the sliding block, and the lower die is arranged at the top of the base of the frame.

The top of the front side of each side plate is integrally provided with a mounting connecting plate 13; each mounting connection plate is provided with a spacing bearing structure 14. The mounting connection plate is used for detachably mounting (preferably installing by bolts) the mounting seat of the heavy-load electric servo power driving module, and the limiting bearing structure can limit the mounting seat and share bending load.

In the present utility model, the above-mentioned limit bearing structure 14 preferably has the following five embodiments.

Example 1 locating step surface

As shown in fig. 13 (a), the mounting connection plates are vertical plates symmetrically and integrally arranged at the top of the front side of each side plate; a flange is provided on the top of the front side of each mounting web, and the bottom surface of the flange and the top surface of the below-described connection seat form a positioning step surface 14-1. When the positioning is performed, when the numerical control is bent, the positioning step surface between the top surface of the connecting seat and the bottom surface of the flange is tightly propped against and contacted, so that the bolt bearing force between the connecting seat and the mounting connecting plate can be shared.

Example 2 positioning key

As shown in fig. 13 (b), the mounting connection plates are vertical plates symmetrically and integrally arranged at the top of the front side of each side plate; u-shaped grooves with equal height and opposite openings are formed in the middle of each installation connecting plate and the middle of each connecting seat, and square or oval positioning key grooves are formed after the two U-shaped grooves are spliced, wherein the positioning key grooves are preferably but not limited to be parallel to the sliding blocks. The positioning key 14-2 is preferably inserted into the positioning key groove, and can share the bolt bearing force between the connecting seat and the mounting connecting plate while positioning.

Example 3 locating pin

As shown in fig. 13 (c) and (d), the mounting connection plates are vertical plates symmetrically integrally arranged on the top of the front side of each side plate; at least one locating pin 14-3 is uniformly and symmetrically distributed on two sides of each installation connecting plate, and each locating pin can be inserted into a corresponding locating hole in the installation seat. The arrangement of at least two locating pins can distribute the bolt bearing force between the connecting seat and the mounting connecting plate while locating, and the bearing capacity and the service life of the connection are increased.

Example 4 upper Ring flange

As shown in fig. 13 (e) and (f), the installation connection plate is a horizontal end plate, and is horizontally and symmetrically integrally arranged at the top of the front side of each side plate; a flange 14-4, also referred to as an upper flange, is mounted (or integrated) on top of the connector. The heavy-load electric servo power driving module passes through the mounting holes of the mounting connecting plate from top to bottom and is mounted on the mounting connecting plate through the upper flange plate.

Example 5 lower Ring flange

As shown in fig. 13 (g) and (h), the installation connection plate is a horizontal end plate, and is horizontally and symmetrically integrally arranged at the top of the front side of each side plate; a flange 14-4, also referred to as a lower flange, is mounted (or integrated) in the middle or lower portion of the connector. The heavy-load electric servo power driving module passes through the mounting hole of the mounting connecting plate from bottom to top and is mounted on the mounting connecting plate through the lower flange plate.

The two groups of heavy-load electric servo power driving modules are symmetrically arranged on two sides of the top of the sliding block.

Each group of heavy-duty electric servo power driving modules is vertically distributed, and the central axis of each group of heavy-duty electric servo power driving modules is preferably coincident with the intersection line of the plane of the corresponding side plate and the plane of the sliding block. The coincidence here allows the coincidence deviation to be controlled within a range of 50 mm.

The central axes are overlapped, so that structural plates are stressed symmetrically and cannot be distorted, and buckling instability of the stressed plates under the action of heavy load is avoided.

In addition, in the utility model, the whole rotating mechanism is coaxially arranged, and the screw rod does not bear radial force, so that the operation is stable, the noise is low, and resonance cannot occur.

Further, as shown in fig. 14 and 15, a slider mounting seat with a top mounting plane is respectively arranged at the top of the slider corresponding to each group of heavy-load electric servo power driving modules; an arc block 55 is sleeved on the periphery of the screw rod below the lifting component (such as a nut) in a sliding manner, and the bottom surface of the arc block is matched with the top mounting plane of the sliding block mounting seat; the top surface of the arc-shaped block is matched with the arc surface 551 or the spherical surface 552 of the bottom surface of the lifting part, as shown in fig. 16.

The lifting member and the arcuate block are preferably connected to the slider mount by a plurality of bolts 56 and are locked at the bottom by lock nuts 562; each bolt between the arc-shaped block and the locking nut is preferably sleeved with a spring 561, so that the buffer effect is achieved.

The following advantages are provided: the heavy-load electric servo power driving module can be movably connected with the sliding block, and the sliding block can incline, unbalanced load and asynchronous left and right, so that the screw rod is not damaged: the lower part of the lifting part (here, the nut) is provided with a circular arc-shaped surface which is matched with the circular arc-shaped surface at the upper part of the circular arc-shaped block, and the lower part of the circular arc-shaped block is matched with the mounting planes of the two shoulders of the sliding block. The bolts sequentially penetrate through the round holes of the shoulders of the sliding blocks, and the round holes of the arc-shaped blocks are fixedly connected with the lifting parts. The lower part of the bolt is sequentially connected with the spring through the lock nut from bottom to top to 'hoist' the sliding block and balance the gravity of the sliding block.

The preferred embodiments of the present utility model have been described in detail above, but the present utility model is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the equivalent changes belong to the protection scope of the present utility model.

Claims (12)

1. The utility model provides a heavy load electricity servo power drive module which characterized in that: comprises an electric servo power input device, a connecting seat, a planetary gear transmission mechanism and a spiral transmission mechanism;

the connecting seat is used for positioning and mounting the heavy-load electric servo power driving module;

the planetary gear transmission mechanism is arranged in the mounting seat and comprises a sun gear and a plurality of planetary gears which are circumferentially arranged on the planetary carrier; the electric servo power input device is arranged at the top of the connecting seat, and an output shaft of the electric servo power input device is coaxially arranged with the sun gear; the screw transmission mechanism comprises a rotating component and a lifting component which are matched with each other through a screw pair; wherein the top of the rotating part is connected with the axle center of the planet carrier; the bottom of the lifting component is connected with lifting equipment to be driven.

2. The heavy duty electric servo power drive module of claim 1 wherein: the electric servo power input device is a servo motor or a servo motor with a speed reducing mechanism or a servo motor with a bevel gear transmission device.

3. The heavy duty electric servo power drive module of claim 1 wherein: the output shaft of the electric servo power input device and the sun gear are coaxially and integrally arranged.

4. The heavy duty electric servo power drive module of claim 1 wherein: the planetary gear transmission mechanism also comprises an outer gear ring, and each planetary gear can be meshed with the solar energy and the outer gear ring; the outer gear ring and the inner wall surface of the connecting seat are integrally arranged or separately arranged.

5. The heavy duty electric servo power drive module of claim 1 wherein: the spiral driving machine is a trapezoidal screw or a ball screw or a planetary roller screw; the spiral driving machine comprises a rotating part and a lifting part; when the rotating part is a nut, the lifting part is a screw rod; when the rotating member is a screw, the rotating member is a nut.

6. The heavy duty electric servo power drive module of claim 1 wherein: the top of the rotating component is connected with the axle center of the planet carrier through a flat key, a spline or a molded surface.

7. The heavy duty electric servo power drive module of claim 1 wherein: the top of the rotating component is coaxially or integrally provided with a spline shaft sleeve, and a plurality of bosses are uniformly distributed on the outer wall surface of the spline shaft sleeve along the circumferential direction; the axis of the planet carrier is provided with grooves with the number corresponding to that of the bosses; the boss is inserted in the corresponding groove, and a movable block is embedded in each groove.

8. The heavy duty electric servo power drive module of claim 1 wherein: the device also comprises a guide mechanism; the guide mechanism comprises a sliding block and a sliding rail; the sliding block and the lifting part of the spiral transmission mechanism are integrally designed or detachably connected; the sliding block is matched with the sliding rail through a sliding pair.

9. A numerical control bender, characterized in that: comprising a frame, a slide block, a bending die and two groups of heavy-duty electric servo power driving modules according to any one of claims 1-8;

the rack comprises a base and two side plates which are arranged on two sides of the base in parallel; the top of the front side of each side plate is integrally provided with a mounting connecting plate; each mounting connecting plate is provided with a limiting bearing structure;

the sliding block is in sliding connection with the front sides of the two side plates;

the bending die comprises an upper die and a lower die; the upper die is arranged at the bottom of the sliding block, and the lower die is arranged at the top of the base of the frame; the two groups of heavy-load electric servo power driving modules are symmetrically arranged on two sides of the top of the sliding block;

the connecting seats of each group of heavy-load electric servo power driving modules are all arranged on the corresponding mounting connecting plates, and the limiting bearing structure can limit the mounting seats and share bending loads; the bottom of the lifting part is connected with the sliding block.

10. The numerically controlled bending machine according to claim 9, wherein: each group of heavy-load electric servo power driving modules is vertically distributed, and the central axis of each group of heavy-load electric servo power driving modules coincides with the intersecting line of the plane of the corresponding side plate and the plane of the sliding block.

11. The numerically controlled bending machine according to claim 9, wherein: the limit bearing structure is a locating step surface or a locating key or at least two locating pins or flange plates positioned on two sides of the installation connecting plate.

12. The numerically controlled bending machine according to claim 9, wherein: the top of the slide block corresponding to each group of heavy-load electric servo power driving modules is integrally provided with a slide block mounting seat with a top mounting plane; an arc-shaped block is arranged right below the lifting component, and the bottom surface of the arc-shaped block is matched with the top mounting plane of the sliding block mounting seat; the top surface of the arc-shaped block is matched with the cambered surface or the spherical surface of the bottom surface of the lifting part; the right lower part of the lifting part and the arc-shaped block are connected with the sliding block mounting seat through a plurality of bolts.