阅读说明：本技术 一种动平衡转子结构 (Dynamic balance rotor structure ) 是由 黄佳南 于 2020-05-22 设计创作，主要内容包括：本发明揭示一种动平衡转子结构,其包括主轴转子、防尘盘及轴承座；防尘盘与轴承座均套设于主轴转子,轴承座连接防尘盘；其中,主轴转子的侧壁设有多个螺纹孔；防尘盘具有第一通孔,第一通孔间断性连通螺纹孔；轴承座具有第二通孔,第二通孔连通第一通孔。本发明的动平衡转子结构可以在无需拆卸主轴的情况下,进行主轴内部转子动平衡的调节,不仅解决了主轴装配完成后,若不进行拆卸就无法调节主轴转子内部动平衡的问题,而且有效地提高了调节精度,降低主轴转子高速运转的挠度。(The invention discloses a dynamic balance rotor structure, which comprises a main shaft rotor, a dustproof disc and a bearing seat; the dustproof disc and the bearing seat are sleeved on the main shaft rotor, and the bearing seat is connected with the dustproof disc; the side wall of the spindle rotor is provided with a plurality of threaded holes; the dustproof disc is provided with a first through hole which is discontinuously communicated with the threaded hole; the bearing seat is provided with a second through hole which is communicated with the first through hole. The dynamic balance rotor structure can adjust the dynamic balance of the rotor in the main shaft under the condition of not dismounting the main shaft, not only solves the problem that the dynamic balance in the main shaft rotor can not be adjusted without dismounting after the main shaft is assembled, but also effectively improves the adjustment precision and reduces the deflection of the main shaft rotor in high-speed operation.)

1. A dynamically balanced rotor structure, comprising: the main shaft rotor, the dustproof disc and the bearing seat; the dustproof disc and the bearing seat are sleeved on the main shaft rotor, and the bearing seat is connected with the dustproof disc;

the side wall of the spindle rotor is provided with a plurality of threaded holes; the dustproof disc is provided with a first through hole, and the first through hole is discontinuously communicated with the threaded hole; the bearing seat is provided with a second through hole which is communicated with the first through hole.

2. The dynamic balance rotor structure of claim 1, wherein the first through hole and the second through hole each have a larger aperture than the threaded hole.

3. The dynamically balanced rotor structure of claim 1, wherein the plurality of threaded holes are evenly distributed along a circumference of the main shaft rotor.

4. The dynamically balanced rotor structure of claim 1, wherein an end of the second through-hole distal from the first through-hole is internally threaded.

5. The dynamically balanced rotor structure of claim 4, further comprising a dust shield; the dustproof part screw is arranged in the internal thread on the bearing seat.

6. The dynamic balance rotor structure of claim 1, wherein the dust-proof disk is provided with a connecting through hole, and a connecting member passes through the connecting through hole to fix the dust-proof disk to the bearing seat.

7. The dynamically balanced rotor structure of claim 1, wherein the main shaft rotor sleeve is provided with a bearing; and the outer ring of the bearing is abutted against the bearing seat.

8. A dynamically balanced rotor structure according to claim 7, characterized in that the bearings are provided with a preload element on one side.

Technical Field

The invention relates to the technical field of electric spindles, in particular to a dynamic balance rotor structure.

Background

With the development of the machine tool industry towards high speed and high precision, the requirement of the main shaft rotation precision is further improved. However, as a factor for restricting the improvement of the spindle rotation accuracy, the spindle system is unbalanced, and a dynamic load is applied to the support, which not only causes vibration of the entire spindle rotating member to generate noise, but also accelerates the wear of the bearing. Therefore, the accuracy of adjusting the dynamic balance of the spindle system must be improved by improving the spindle rotation accuracy. The traditional electric spindle is mainly divided into three stages for adjusting the dynamic balance precision. Firstly, before assembling the electric spindle, performing single-piece dynamic balance adjustment on a spindle rotor component, wherein the dynamic balance precision is mainly adjusted by a front dynamic balance ring and a rear dynamic balance ring on the spindle rotor component; secondly, before the electric spindle is assembled, the overall dynamic balance of the spindle is adjusted, and the dynamic balance precision of the electric spindle is adjusted mainly through dynamic balance threaded holes formed in front and rear locking nuts of the electric spindle at the stage; finally, after the electric spindle is assembled, high-speed dynamic balance adjustment is carried out, the adjustment precision at this stage is improved, the deflection of the spindle rotor in high-speed operation can be effectively reduced, the service life of the electric spindle is prolonged, however, after the electric spindle is assembled, under the limitation of factors such as spatial position and the like, if the spindle is not disassembled, dynamic balance adjustment cannot be carried out on the inner rotor, at present, adjustment can only be carried out through dynamic balance threaded holes in the front locking nut, but the adjustment through the dynamic balance threaded holes in the front locking nut greatly limits the high-speed dynamic balance adjustment precision.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention discloses a dynamic balance rotor structure, which comprises: the main shaft rotor, the dustproof disc and the bearing seat; the dustproof disc and the bearing seat are sleeved on the main shaft rotor, and the bearing seat is connected with the dustproof disc;

the side wall of the spindle rotor is provided with a plurality of threaded holes; the dustproof disc is provided with a first through hole which is discontinuously communicated with the threaded hole; the bearing seat is provided with a second through hole which is communicated with the first through hole.

According to an embodiment of the present invention, the first through hole and the second through hole have a larger diameter than the threaded hole.

According to an embodiment of the present invention, the plurality of threaded holes are uniformly distributed along a circumference of the spindle rotor.

According to an embodiment of the present invention, an end of the second through hole away from the first through hole has an internal thread.

According to an embodiment of the present invention, the dynamic balance rotor structure further includes a dust-proof member; the dustproof part screw is arranged in the internal thread on the bearing seat.

According to an embodiment of the present invention, the dust-proof disc is provided with a connecting through hole, and the connecting member passes through the connecting through hole to fix the dust-proof disc to the bearing seat.

According to an embodiment of the present invention, the spindle rotor sleeve is provided with a bearing; the outer ring of the bearing is abutted against the bearing seat.

According to an embodiment of the invention, a preload member is provided on one side of the bearing.

The invention has the beneficial effects that: the dynamic balance rotor structure can adjust the dynamic balance of the rotor in the main shaft under the condition of not dismounting the main shaft, not only solves the problem that the dynamic balance in the main shaft rotor can not be adjusted without dismounting after the main shaft is assembled, but also effectively improves the adjustment precision and reduces the deflection of the main shaft rotor in high-speed operation.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a sectional view of a dynamic balance rotor structure in an embodiment of the present invention.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

For a further understanding of the contents, features and effects of the present invention, the following examples are illustrated in the accompanying drawings and described in the following detailed description:

referring to fig. 1, fig. 1 is a cross-sectional view of a dynamic balance rotor structure according to an embodiment of the present invention. As shown in the drawings, the dynamic balance rotor structure of the present application includes a main shaft rotor 11, a dust-proof disk 12, and a bearing housing 13. The main shaft rotor 11 is sleeved with the dustproof disc 12 and the bearing seat 13, and the bearing seat 13 is connected with the dustproof disc 12. The side wall of the main shaft rotor 11 is provided with a plurality of threaded holes 111, and the plurality of threaded holes 111 are uniformly distributed along the circumference of the main shaft rotor 11, that is, the axes of the plurality of threaded holes 111 are in the same plane. The dustproof disk 12 is provided with a first through hole 121, and the first through hole 121 is intermittently communicated with the threaded hole 111. The bearing housing 13 has a second through hole 131, and the second through hole 131 communicates with the first through hole 121. During specific application, the aperture of the first through hole 121 is the same as that of the second through hole 131 and is larger than that of the threaded hole 111, the electric spindle is mounted on a dynamic balance testing device in a high-speed dynamic balance adjusting stage of the electric spindle, the spindle rotor 11 is rotated to an angle at which a counterweight needs to be adjusted according to the unbalance amount measured by the dynamic balance testing device, at the moment, the first through hole 121 is communicated with one threaded hole 111 of the plurality of threaded holes 111, a counterweight screw (not shown in the figure) sequentially penetrates through the second through hole 131 and the first through hole 121 and is screwed on the threaded hole 111 through a tool, the counterweight screw has certain weight, dynamic balance adjustment of the spindle rotor 11 is achieved, adjustment accuracy is effectively improved, and deflection of the spindle rotor 11 during high-speed operation is reduced.

Preferably, the dynamic balancing rotor structure further comprises a dust guard 14. One end of the second through hole 131, which is far away from the first through hole 121, is provided with an internal thread, the dustproof part screw 14 is arranged in the internal thread on the bearing seat 13, when the high-speed dynamic balance adjustment of the electric spindle is needed, the dustproof part 14 is taken down, and after the adjustment is completed, the dustproof part 14 is screwed in the internal thread, so that dust can be effectively prevented from entering the interior of the spindle rotor 11 and affecting the interior of the electric spindle. In this embodiment, the dust-proof member 14 is a flat-end set screw, and the flat-end set screw is selected for convenient installation and disassembly.

During the concrete application, connect through hole 122 has been seted up to dustproof dish 12, and connecting piece 1221 passes connect through hole 122 and connects dustproof dish 12 on bearing frame 13, and connecting piece 1221 is fastening screw, is fixed in bearing frame 13 with dustproof dish 12 through connecting piece 1221, and firm in connection also is difficult not hard up for long-time use, can effectively guarantee the normal operating of electric main shaft to do benefit to later maintenance and dismantlement.

Preferably, the spindle rotor 11 is sleeved with a bearing 15, an outer ring of the bearing 15 abuts against the bearing seat 13, the spindle rotor 11 is supported by the bearing 15, the friction coefficient of the spindle rotor 11 in the motion process is effectively reduced, and the rotation precision of the spindle rotor 11 is ensured.

Preferably, a preload piece 16 is provided at one side of the bearing 15. The preload piece 16 is a spring, and the spring provides preload for the bearing 15, so that the reliability and tightness of connection are ensured, the axial clearance of the bearing 15 is eliminated, and the rotation precision of the spindle rotor 11 is improved.

In summary, in one or more embodiments of the present invention, the dynamic balance rotor structure of the present invention can adjust the dynamic balance of the rotor inside the main shaft without disassembling the main shaft, which not only solves the problem that the dynamic balance inside the main shaft rotor cannot be adjusted without disassembling the main shaft after the main shaft is assembled, but also effectively improves the adjustment accuracy and reduces the deflection of the main shaft rotor during high-speed operation.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.