Direct drive flywheel assembly for an electric screw press

Abstract

The utility model discloses a kind of direct-drive flywheel assemblies of electric screw press, including direct-drive motor, pressure ring, flywheel hub, flywheel, main screw, first friction plate and self-lubricating copper bush, direct-drive motor includes stator and rotor, rotor fixedly connected pressure ring, pressure ring fixedly connected flywheel hub, main screw is installed on the body by bearing, main screw is fixedly connected with flywheel hub, flywheel hub is sleeved with self-lubricating copper bush, self-lubricating copper bush is sleeved flywheel, first annular limit slot is provided on flywheel hub or flywheel, first annular limit slot is provided with first friction plate, flywheel hub and flywheel cooperation clamping first friction plate, so that flywheel hub rotates by first friction plate and drives flywheel to rotate.The direct-drive flywheel assembly of the utility model is connected more directly and closely between the rotor of direct-drive motor and main screw by optimizing structure design, reduces the rotor deflection risk caused by intermediate component wear, thereby effectively avoid the problem of sweeping bore.

Description

Technical Field

[0001] This utility model belongs to the field of electric screw presses, and more specifically, relates to a direct drive flywheel assembly for an electric screw press. Background Technology

[0002] As the tonnage of domestically produced electric screw presses increases, in order to protect the equipment, the flywheel of the electric screw press has also transitioned from an integral structure to a modular structure. The modular structure of the flywheel is mainly divided into an inner ring assembly and an outer ring assembly. The inner ring assembly mainly includes the hub, main screw, main screw lock nut, etc., while the outer ring assembly mainly includes the flywheel, slipping lower ring, etc. Between the inner ring assembly and the outer ring assembly is an annular slipping copper sleeve. The slipping copper sleeve ensures that the inner ring assembly and the outer ring assembly of the flywheel modular structure can rotate relative to each other under specific conditions. Then, the friction plate and the tie rod bolt combine the inner ring assembly and the outer ring assembly into a whole.

[0003] Currently, the rotor of the direct-drive motor in an electric screw press is fixed to a flywheel. The flywheel's forward and reverse rotation drives the main screw, which in turn moves the slide block up and down. While this fixing method achieves a certain degree of direct connection between the motor and the flywheel, in actual operation, the complexity of the flywheel's structure and the suboptimal connection method with the main screw lead to problems in power transmission between the rotor and the main screw. Specifically, due to the numerous intermediate connecting components, these components are prone to wear and deformation during long-term operation. When these intermediate connecting components wear, the coaxiality between the rotor and the main screw changes, affecting the normal operation of the motor. When the coaxiality deviation is too large, the rotor, fixed to the flywheel of the outer ring assembly, will deflect, causing contact and friction between the rotor and stator, resulting in rotor rubbing. Once rotor and stator rubbing occurs, the electric screw press must be shut down for maintenance, affecting production progress. Utility Model Content

[0004] To address the aforementioned deficiencies or improvement needs of existing technologies, this utility model provides a direct-drive flywheel assembly for an electric screw press. The rotor of the direct-drive motor is connected to the main screw via a pressure ring and a flywheel hub, effectively solving the problem of rotor rubbing caused by wear of intermediate connecting parts due to excessive intermediate connecting parts between the rotor and the main screw.

[0005] To achieve the above objectives, according to one aspect of this utility model, a direct-drive flywheel assembly for an electric screw press is provided, comprising a direct-drive motor, a pressure ring, a flywheel hub, a flywheel, a main screw, a first friction plate, and a self-lubricating copper sleeve, wherein: The direct drive motor includes a stator and a rotor, with the stator fixedly mounted on the machine body; The rotor is fixedly connected to the pressure ring, the pressure ring is fixedly connected to the flywheel hub, and the flywheel hub is coaxially arranged with the rotor; The main screw is mounted on the machine body via bearings, and the main screw is fixedly connected to the flywheel hub and the main screw and the flywheel hub are arranged coaxially. A self-lubricating copper sleeve is fitted onto the flywheel hub, and the flywheel is fitted onto the self-lubricating copper sleeve. The flywheel hub or the flywheel is provided with a first annular limiting groove, and an annular first friction plate is provided in the first annular limiting groove. The first friction plate is coaxial with or parallel to the axis of the self-lubricating copper sleeve. The flywheel hub and the flywheel cooperate to clamp the first friction plate so that when the flywheel hub rotates, the flywheel is driven to rotate through the first friction plate.

[0006] Preferably, the pressure ring is fitted onto the flywheel hub, and multiple saddle pins are installed at the joint between the pressure ring and the flywheel hub.

[0007] Preferably, the flywheel is provided with a second annular limiting groove, and an annular second friction plate is provided in the second annular limiting groove. The second friction plate is parallel to the first friction plate, and the pressure ring cooperates with the flywheel to clamp the second friction plate.

[0008] Preferably, the pressure ring is fixedly connected to the flywheel hub by a plurality of disc spring assemblies, and these disc spring assemblies are evenly arranged along the circumference of the flywheel hub; Each of the disc spring assemblies includes a disc spring, a guide sleeve, and a bolt fastener. The disc spring is sleeved on the guide sleeve, and one end of the bolt fastener passes through the guide sleeve and the pressure ring in sequence and is threaded onto the flywheel hub. The bolt fastener fixes the disc spring and the guide sleeve on the pressure ring so that the disc spring applies elastic force to the pressure ring.

[0009] Preferably, each of the disc spring assemblies has two guide sleeves and multiple disc springs, with multiple disc springs respectively fitted onto each guide sleeve.

[0010] Preferably, the flywheel hub is sleeved on the main screw, and multiple saddle pins II are installed at the joint between the flywheel hub and the main screw.

[0011] Preferably, it also includes a flywheel cover, which is fixedly installed on the flywheel hub. The flywheel cover has an annular boss that presses against one end of the main screw to prevent the main screw from moving axially.

[0012] Preferably, it also includes a main screw locking nut, which is threadedly connected to the end of the main screw near the flywheel cover and presses the flywheel cover.

[0013] Preferably, the stator is fixedly mounted on the machine body by a mounting assembly, the mounting assembly including a mounting plate and a mounting base, the stator is fixedly mounted on the mounting plate by mounting screw I and locating pin I, the mounting plate is fixedly mounted on the mounting base by mounting screw II and locating pin II, and the mounting base is fixedly mounted on the machine body by mounting screw III and locating key I.

[0014] Preferably, the rotor is fixedly mounted on the pressure ring by mounting screws IV and locating key II.

[0015] In summary, compared with the prior art, the above-described technical solution conceived by this utility model can achieve the following beneficial effects: This invention relates to a direct-drive flywheel assembly for an electric screw press. The rotor of the direct-drive motor is directly connected to the flywheel hub via a pressure ring, and the flywheel hub is then fixedly connected to the main screw. This eliminates many intermediate transmission components, allowing power to be transmitted more directly and efficiently to the main screw, significantly improving transmission efficiency and reducing energy loss during transmission. This enables the electric screw press to respond more quickly during operation, increasing production efficiency. Furthermore, the optimized structural design of this direct-drive flywheel assembly makes the connection between the rotor of the direct-drive motor, the flywheel hub, and the main screw more direct and reliable, reducing the risk of rotor deflection due to wear of intermediate components and effectively avoiding rotor rubbing problems caused by the direct-drive motor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1. Stator; 2. Rotor; 3. Mounting plate; 4. Mounting base; 5. Frame; 6. Pressure ring; 7. Threaded fastener; 8. Guide sleeve; 9. Disc spring; 10. Main screw; 11. Seam pin II; 12. Main screw lock nut; 13. Flywheel cover; 14. Seam pin I; 15. Positioning key II; 16. Second friction plate; 17. Flywheel; 18. Self-lubricating copper sleeve; 19. Flywheel hub; 20. First friction plate; 21. Bearing. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] Reference Figure 1 A direct-drive flywheel assembly for an electric screw press includes a direct-drive motor, a pressure ring 6, a flywheel hub 19, a flywheel 17, a main screw 10, a first friction plate 20, and a self-lubricating copper sleeve 18.

[0019] The direct drive motor includes a stator 1 and a rotor 2, with the stator 1 fixedly mounted on the casing 5.

[0020] The rotor 2 is fixedly connected to the pressure ring 6, and the pressure ring 6 is fixedly connected to the flywheel hub 19. The flywheel hub 19 is arranged coaxially with the rotor 2.

[0021] The main screw 10 is mounted on the fuselage 5 via a bearing 21. The main screw 10 is fixedly connected to the flywheel hub 19 and the main screw 10 and the flywheel hub 19 are arranged coaxially.

[0022] A self-lubricating copper sleeve 18 is fitted onto the flywheel hub 19, and the flywheel 17 is fitted onto the self-lubricating copper sleeve 18.

[0023] The flywheel hub 19 or the flywheel 17 is provided with a first annular limiting groove, and an annular first friction plate 20 is provided in the first annular limiting groove. The first friction plate 20 is coaxial with or parallel to the axis of the self-lubricating copper sleeve 18. The flywheel hub 19 and the flywheel 17 cooperate to clamp the first friction plate 20 so that when the flywheel hub 19 rotates, it drives the flywheel 17 to rotate through the first friction plate 20.

[0024] This invention achieves a reasonable design and connection of components such as the rotor 2, pressure ring 6, flywheel hub 19, and main screw 10 of the direct drive motor. When the self-lubricating copper sleeve 18 wears, the flywheel 17 outside the flywheel hub 19 deflects, while the rotor 2 of the direct drive motor does not deflect. The rotor 2 can still remain stably in its original position, and the rotor 2 will not deflect and rub against the stator 1, effectively avoiding the problem of rotor rubbing.

[0025] Furthermore, the pressure ring 6 is fitted onto the flywheel hub 19, and multiple saddle pins I14 are installed at the joint between the pressure ring 6 and the flywheel hub 19. During the operation of the electric screw press, the high-speed rotation of the main screw 10 and the up-and-down movement of the slider generate significant vibration and impact forces. If these forces are transmitted to the connection between the pressure ring 6 and the flywheel hub 19, they can easily cause the connection to loosen, thus affecting the normal operation of the entire direct-drive flywheel 17 assembly. The use of saddle pins I14, through their tight fit with the pressure ring 6 and the flywheel hub 19, can firmly connect the two together, ensuring the stability of the connection under various complex working conditions and avoiding equipment failure due to loosening. Through the precise positioning and fixing effect of the saddle pins I14, the coaxiality and concentricity between the pressure ring 6 and the flywheel hub 19 can also be effectively guaranteed, thereby improving the operating accuracy and stability of the entire equipment.

[0026] Furthermore, the flywheel 17 is provided with a second annular limiting groove, within which an annular second friction plate 16 is disposed. The second friction plate 16 is parallel to the first friction plate 20, and the pressure ring 6 cooperates with the flywheel 17 to clamp the second friction plate 16. This design ensures that during power transmission, not only does the flywheel hub 19 drive the flywheel 17 to rotate via the first friction plate 20, but the flywheel 17 itself can also further enhance the power transmission effect through the friction between the second friction plate 16 and the pressure ring 6. This dual friction plate design makes power transmission more reliable, reduces the risk of power transmission interruption due to wear or slippage of a single friction plate, and ensures stable operation of the equipment under long-term, high-load operating conditions. By adding the second friction plate 16, the frictional force is distributed to two friction plates, reducing the force per unit area of ​​each friction plate, thereby slowing down the wear rate of the friction plates. This not only extends the service life of the friction plates but also reduces the risk of equipment failure due to friction plate wear, improving the overall durability and reliability of the equipment.

[0027] Furthermore, the pressure ring 6 is fixedly connected to the flywheel hub 19 by a plurality of disc spring 9 assemblies, and these disc spring 9 assemblies are evenly arranged along the circumference of the flywheel hub 19. Each of the disc spring 9 assemblies includes a disc spring 9, a guide sleeve 8, and a bolt fastener. The disc spring 9 is sleeved on the guide sleeve 8. One end of the bolt fastener passes through the guide sleeve 8 and the pressure ring 6 in sequence and is threaded onto the flywheel hub 19. The bolt fastener fixes the disc spring 9 and the guide sleeve 8 onto the pressure ring 6 so that the disc spring 9 applies elastic force to the pressure ring 6. The elastic force is then transmitted to the first friction plate 20 and the second friction plate 16 through the pressure ring 6. The pressure ring 6 can cooperate with the flywheel 17 to better clamp the second friction plate 16, and the flywheel hub 19 cooperates with the flywheel 17 to better clamp the first friction plate 20.

[0028] Furthermore, each of the disc spring 9 assemblies has two guide sleeves 8 and multiple disc springs 9, with multiple disc springs 9 respectively fitted onto each guide sleeve 8. The guide sleeves 8 ensure that the disc springs 9 deform in the correct direction when subjected to force, preventing the disc springs 9 from becoming skewed or damaged due to lateral forces. The multiple disc springs 9 distributed on the two guide sleeves 8 can distribute the force more evenly.

[0029] Furthermore, the flywheel hub 19 is sleeved on the main screw 10, and multiple seam pins II 11 are installed at the joint between the flywheel hub 19 and the main screw 10. The seam pins II 11 effectively prevent relative displacement or loosening between the flywheel hub 19 and the main screw 10 during operation due to external forces such as vibration and impact. Under the high-load, long-term operation conditions of the electric screw press, this connection between the flywheel hub 19 and the main screw 10 ensures a stable connection between them, reducing equipment failures caused by loose connections. The stable connection and good coaxiality between the main screw 10 and the flywheel hub 19 optimize the smoothness of power transmission. During the operation of the electric screw press, the rotation of the main screw 10 requires a smooth power input to ensure the accuracy of the slide block's up-and-down movement. The fixing effect of the saddle pin II11 ensures that the power is smoothly transmitted from the flywheel hub 19 to the main screw 10, reducing equipment vibration and workpiece machining errors caused by unstable power transmission.

[0030] Furthermore, a flywheel cover 13 is included, which is fixedly mounted on the flywheel hub 19. The flywheel cover 13 has an annular boss that presses against one end of the main screw 10 to prevent axial movement of the main screw 10. The use of the flywheel cover 13 can reduce the vibration and impact of the main screw 10 during operation. Since the axial movement of the main screw 10 is effectively limited, the vibration and impact forces generated during equipment operation are reduced. During the operation of the electric screw press, the rotation of the main screw 10 requires a smooth power input to ensure the accuracy of the slide block's up and down movement. The flywheel cover 13 can reduce the unstable power transmission caused by the axial movement of the main screw 10, thereby improving the operating accuracy and processing quality of the equipment.

[0031] Furthermore, it also includes a main screw locking nut 12, which is threadedly connected to the end of the main screw 10 near the flywheel cover 13 and presses the flywheel cover 13 against it. This design further enhances the fixing effect of the main screw 10, ensuring that the main screw 10 will not move axially during operation. In addition, the main screw locking nut 12, by pressing the flywheel cover 13, ensures the stability of the flywheel cover 13 during operation. The flywheel cover 13 prevents axial movement of the main screw 10, while the main screw locking nut further reinforces the fixing effect of the flywheel cover 13.

[0032] Furthermore, the stator 1 is fixedly mounted on the housing 5 via a mounting assembly, which includes a mounting plate 3 and a mounting base 4. The stator 1 is fixedly mounted on the mounting plate 3 by mounting screws I and locating pins I. The mounting plate 3 is fixedly mounted on the mounting base 4 by mounting screws II and locating pins II. The mounting base 4 is fixedly mounted on the housing 5 by mounting screws III and locating keys I. Through the cooperation of the mounting assembly, mounting screws, locating pins, and locating keys, the stator 1 can be precisely positioned on the housing 5, thereby ensuring the operating accuracy of the direct drive motor.

[0033] Furthermore, the rotor 2 is fixedly mounted on the pressure ring 6 using mounting screws IV and locating key II 15. The cooperation of mounting screws IV and locating key II 15 ensures precise positioning of the rotor 2 on the pressure ring 6. This precise mounting method ensures the coaxiality and concentricity between the rotor 2 and the pressure ring 6, thereby guaranteeing the operating accuracy of the direct drive motor.

[0034] During operation, the direct drive motor drives the rotor 2 to rotate in both directions. The rotor 2 drives the pressure ring 6 to rotate in both directions, and the pressure ring 6 drives the flywheel hub 19 to rotate in both directions. The flywheel hub 19 drives the flywheel 17 and the main screw 10 to rotate in both directions through the friction provided by the first friction plate 20 and the second friction plate 16. One rotation in both directions represents the back and forth operation of the equipment. When the equipment is overloaded, the flywheel 17 can be slipped by the self-lubricating copper sleeve 18 to unload the excess impact force and protect the equipment.

[0035] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A direct-drive flywheel assembly for an electric screw press, characterized in that, Includes a direct drive motor, pressure ring, flywheel hub, flywheel, main screw, first friction plate, and self-lubricating copper bushing, wherein: The direct drive motor includes a stator and a rotor, with the stator fixedly mounted on the machine body; The rotor is fixedly connected to the pressure ring, the pressure ring is fixedly connected to the flywheel hub, and the flywheel hub is coaxially arranged with the rotor; The main screw is mounted on the machine body via bearings, and the main screw is fixedly connected to the flywheel hub and the main screw and the flywheel hub are arranged coaxially. A self-lubricating copper sleeve is fitted onto the flywheel hub, and the flywheel is fitted onto the self-lubricating copper sleeve. The flywheel hub or the flywheel is provided with a first annular limiting groove, and an annular first friction plate is provided in the first annular limiting groove. The first friction plate is coaxial with or parallel to the axis of the self-lubricating copper sleeve. The flywheel hub and the flywheel cooperate to clamp the first friction plate so that when the flywheel hub rotates, the flywheel is driven to rotate through the first friction plate.

2. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, The pressure ring is fitted onto the flywheel hub, and multiple saddle pins are installed at the joint between the pressure ring and the flywheel hub.

3. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, The flywheel is provided with a second annular limiting groove, and an annular second friction plate is provided in the second annular limiting groove. The second friction plate is parallel to the first friction plate, and the pressure ring cooperates with the flywheel to clamp the second friction plate.

4. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, The pressure ring is fixedly connected to the flywheel hub by multiple disc spring assemblies, and these disc spring assemblies are evenly arranged along the circumference of the flywheel hub. Each of the disc spring assemblies includes a disc spring, a guide sleeve, and a bolt fastener. The disc spring is sleeved on the guide sleeve, and one end of the bolt fastener passes through the guide sleeve and the pressure ring in sequence and is threaded onto the flywheel hub. The bolt fastener fixes the disc spring and the guide sleeve on the pressure ring so that the disc spring applies elastic force to the pressure ring.

5. The direct-drive flywheel assembly of an electric screw press according to claim 4, characterized in that, Each of the disc spring assemblies has two guide sleeves and multiple disc springs, with multiple disc springs respectively fitted onto each of the guide sleeves.

6. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, The flywheel hub is fitted onto the main screw, and multiple saddle pins II are installed at the joint between the flywheel hub and the main screw.

7. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, It also includes a flywheel cover, which is fixedly installed on the flywheel hub. The flywheel cover has an annular boss that presses against one end of the main screw to prevent the main screw from moving axially.

8. The direct-drive flywheel assembly of an electric screw press according to claim 7, characterized in that, It also includes a main screw locking nut, which is threadedly connected to the end of the main screw near the flywheel cover and presses the flywheel cover.

9. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, The stator is fixedly mounted on the machine body by a mounting assembly, which includes a mounting plate and a mounting base. The stator is fixedly mounted on the mounting plate by mounting screw I and locating pin I. The mounting plate is fixedly mounted on the mounting base by mounting screw II and locating pin II. The mounting base is fixedly mounted on the machine body by mounting screw III and locating key I.

10. The direct-drive flywheel assembly of an electric screw press according to claim 1, characterized in that, The rotor is fixedly mounted on the pressure ring by mounting screws IV and locating key II.

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