High-speed dynamic and static piezoelectric spindle

Abstract

The utility model provides a high-speed dynamic and static piezoelectric main shaft which comprises an outer shell, a front bearing, a front check ring, a motor stator, a motor rotor, a main shaft, a rear bearing, a rear check ring, an airtight sealing ring, a motor shell and a rear end cover. The front bearing is embedded into the outer shell, the front check ring is correspondingly connected with the front bearing, the motor rotor is located in the motor stator, the main shaft penetrates through the front bearing and is matched with the rear bearing to form a double-supporting structure, and the rear check ring is embedded between the motor stator and the rear bearing. The airtight sealing ring is arranged between the front bearing and the front check ring, the motor shell is integrally and fixedly connected to the outer shell, and the rear end cover is arranged at the end, away from the outer shell, of the motor shell. According to the design, through the static pressure end face thrust technology, the rigidity and stability of the main shaft are remarkably improved, vibration and deviation during high-speed rotation are reduced, and the machining precision and the surface smoothness are improved.

Description

TECHNICAL FIELD

[0001] The utility model provides a kind of electric spindle belongs to numerical control machine tool technical field, in particular to a kind of high-speed dynamic static pressure electric spindle. BACKGROUND

[0002] Electric spindle is a kind of high-precision, high-speed, high-rigidity electromechanical integration assembly integrated motor and spindle function, it directly drives machine tool spindle by built-in motor, realizes the "zero transmission" of machine tool main drive system, with compact structure, fast response speed, stable operation, easy maintenance and other advantages, plays an important role in numerical control machine tool, machining, robot and other fields.

[0003] The prior art electric spindle has deficiencies in precision and stability, the traditional mechanical transmission system is prone to wear, resulting in precision decline and vibration problems of the spindle during high-speed operation, affecting the processing quality. In addition, the rigidity of the traditional spindle is low, and it is easy to deform under a large load, resulting in increased error during processing, affecting the consistency and reliability of the product. Since belts, gears and other transmission components are used, the structure of the existing electric spindle is relatively complex, increasing the difficulty of maintenance and replacement, and also increasing the dynamic load, shortening the service life of the spindle. In terms of response speed, the traditional electric spindle reacts slowly when starting and stopping and adjusting speed, and it is difficult to meet the demand of modern numerical control machine tools for high efficiency and high speed processing. In addition, the prior art often faces the problem of insufficient dynamic precision when achieving high speed, and cannot effectively support the requirements of high-speed cutting and precision machining, limiting its application in high-end manufacturing fields. SUMMARY

[0004] To make up for the deficiencies of the prior art, the present application provides a high-speed dynamic static pressure electric spindle, which solves the limitations of traditional electric spindles in high speed, high rigidity, high precision and high reliability.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a kind of high-speed dynamic static pressure electric spindle, including shell body, the inner side of one end of the shell body is equipped with front bearing, front baffle ring, the inside of the other end of shell body is equipped with motor stator, motor rotor;

[0006] The front bearing is embedded in the shell body, and the front baffle ring is arranged at the end of the front bearing away from the shell body and connected therewith.

[0007] The motor rotor is located in the interior of the motor stator.

[0008] Preferably, the shell body is provided with a main shaft penetrating through the front bearing, and the main shaft is provided with a rear bearing outside the end away from the front bearing.

[0009] Preferably, a rear baffle ring is embedded in the interior of the shell body between the motor stator and the rear bearing.

[0010] Preferably, a gas seal ring is arranged between the front bearing and the front retainer ring, and an outer shell body is integrally connected with a motor housing arranged outside the motor stator and the motor rotor at one end close to the motor stator.

[0011] Preferably, the motor housing is provided with a rear end cover at one end away from the outer shell body.

[0012] Preferably, the front bearing and the rear bearing form a static pressure end face thrust.

[0013] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] The utility model discloses a kind of high-speed dynamic and static pressure motor spindles, comprising outer shell body, front bearing, front retainer ring, motor stator, motor rotor, main shaft, rear bearing and rear retainer ring, wherein, outer shell body is integrally connected with motor housing arranged outside motor stator and motor rotor at one end, and motor housing is provided with rear end cover at one end away from outer shell body.

[0015] Other advantages, objects and features of the present utility model will be described in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the present utility model. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a sectional view of the high-speed dynamic and static pressure motor spindle of the present utility model.

[0017] As shown in the figure:

[0018] 1, outer shell body; 2, front bearing; 3, front retainer ring; 4, motor stator; 5, motor rotor; 6, main shaft; 7, rear bearing; 8, rear retainer ring; 9, gas seal ring; 10, motor housing; 11, rear end cover. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present utility model.

[0020] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figure 1 As shown, a high-speed dynamic-static piezoelectric spindle includes a housing 1, characterized in that: a front bearing 2 and a front retaining ring 3 are provided on the inner side of one end of the housing 1, and a motor stator 4 and a motor rotor 5 are provided inside the other end of the housing 1. The front bearing 2 is embedded in the housing 1, and the front retaining ring 3 is placed at the end of the front bearing 2 away from the housing 1 and correspondingly connected to it; the motor rotor 5 is located inside the motor stator 4. A spindle 6 is provided inside the housing 1, passing through the front bearing 2, and a rear bearing 7 is sleeved on the outer side of the end of the spindle 6 away from the front bearing 2. A rear retaining ring 8 is provided between the motor stator 4 and the rear bearing 7, embedded inside the housing 1.

[0023] In this implementation scheme, the compact and efficient design achieves high-speed operation and high-precision control of the spindle. The dual-support structure of the front bearing 2 and the rear bearing 7, combined with the hydrostatic thrust design, significantly improves the rigidity and stability of the spindle, reducing vibration and deviation caused by high-speed rotation, thereby improving machining accuracy and surface finish. Simultaneously, the direct engagement between the motor rotor 5 and the motor stator 4 enables the electric spindle to respond quickly, allowing for rapid start-up, shutdown, and speed adjustment, meeting the demands of modern CNC machine tools for fast and precise machining. Furthermore, the rear retaining ring 8 further enhances structural stability, ensuring the reliability of the motor assembly during high-speed operation. Overall, this design not only improves the performance of the electric spindle but also simplifies maintenance procedures, reduces operating costs, and provides a more advanced and reliable solution for the precision machining field.

[0024] like Figure 1 As shown, an airtight ring 9 is provided between the front bearing 2 and the front retaining ring 3. A motor housing 10, which is sleeved on the outside of the motor stator 4 and the motor rotor 5, is integrally fixedly connected to the outer end of the outer housing 1 near the motor stator 4. A rear end cover 11 is provided at the end of the motor housing 10 away from the outer housing 1. The front bearing 2 and the rear bearing 7 form a hydrostatic thrust face, ensuring the high-speed stability and accuracy of the spindle.

[0025] In this embodiment, the air-tight sealing ring 9 effectively prevents dust and impurities from entering the interior of the main shaft, protecting the front bearing 2 and the motor assembly, prolonging the service life of the device and improving reliability. The integrated fixed connection of the motor body shell 10 and the outer shell 1 enhances the rigidity of the overall structure, while simplifying the assembly process and improving production efficiency. The design of the rear end cover 11 not only protects the motor body shell 10 away from the end of the outer shell 1, but also helps to maintain the sealing of the motor assembly, preventing lubricating grease leakage, ensuring the stability and accuracy of the main shaft during high-speed operation. Through these designs, the high-speed dynamic and static pressure motorized spindle of the utility model not only improves machining efficiency and accuracy, but also reduces maintenance costs and failure rates, meeting the strict requirements of modern manufacturing for high-performance motorized spindles.

[0026] In use, first involves installing the main shaft 6 inside the outer shell 1, ensuring that the front bearing 2 is embedded in the outer shell 1 and positioned correctly, then installing the front retainer ring 3 and connecting it with the front bearing 2, then installing the motor stator 4 and motor rotor 5, ensuring that the motor rotor 5 is inside the motor stator 4, then installing the air-tight sealing ring 9 between the front bearing 2 and the front retainer ring 3 to prevent dust and impurities from entering, then integrally fixing the motor body shell 10 to the end of the outer shell 1 near the motor stator 4, and ensuring that the motor body shell 10 is set outside the motor stator 4 and the motor rotor 5, then installing the rear end cover 11 to protect the end of the motor body shell 10 away from the outer shell 1, and maintaining the sealing of the motor assembly, finally installing the rear bearing 7 and the rear retainer ring 8 to form a static pressure end face thrust structure, ensuring the high-speed stability and accuracy of the main shaft, after completing the installation of all components, system testing is performed to check the connection and alignment of each part, and after confirming that there is no error, the motorized spindle is started, and speed and load testing is performed to verify the performance and stability of the main shaft, ensuring that it meets the requirements of high-speed precision machining.

[0027] Although the utility model has been disclosed as above with preferred embodiments, it is not intended to limit the utility model, and anyone familiar with the technology can make various modifications and modifications without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model should be limited by the claims.

Claims

1. A high speed hydrostatic electric spindle comprising an outer housing (1), characterized in that: One end of the outer shell (1) is provided with a front bearing (2) and a front retainer ring (3), and the other end of the outer shell (1) is provided with a motor stator (4) and a motor rotor (5) inside. The front bearing (2) is embedded in the outer shell (1), and the front retainer ring (3) is arranged at the end of the front bearing (2) away from the outer shell (1) and is connected with the corresponding end. The motor rotor (5) is located inside the motor stator (4).

2. A high-speed hydrostatic electric spindle according to claim 1, characterized in that: The outer shell (1) is provided with a main shaft (6) penetrating through the front bearing (2), and the end of the main shaft (6) away from the front bearing (2) is externally provided with a rear bearing (7).

3. A high-speed hydrostatic electric spindle according to claim 2, characterized in that: The motor stator (4) and the rear bearing (7) are provided with a rear retainer ring (8) embedded in the inner part of the outer shell (1).

4. The high-speed hydrostatic electric spindle of claim 1, wherein: The front bearing (2) and the front retainer ring (3) are provided with an air-tight seal ring (9), and the end of the outer shell (1) close to the motor stator (4) is integrally fixedly connected with a motor shell (10) externally sleeved on the motor stator (4) and the motor rotor (5).

5. A high-speed hydrostatic electric spindle according to claim 4, characterized in that: The motor shell (10) is provided with a rear end cover (11) at the end away from the outer shell (1).

6. A high-speed hydrostatic electric spindle according to claim 2, characterized in that: The front bearing (2) and the rear bearing (7) form a static pressure end face thrust.

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