CN222359285U - A spindle box hole system structure capable of axially positioning a bearing - Google Patents
A spindle box hole system structure capable of axially positioning a bearing Download PDFInfo
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- CN222359285U CN222359285U CN202421160394.2U CN202421160394U CN222359285U CN 222359285 U CN222359285 U CN 222359285U CN 202421160394 U CN202421160394 U CN 202421160394U CN 222359285 U CN222359285 U CN 222359285U
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Abstract
本实用新型提供一种可对轴承轴向定位的主轴箱孔系结构。所述可对轴承轴向定位的主轴箱孔系结构包括：轴箱，所述轴箱上开设有装配孔系，所述装配孔系内设置有主轴本体；用于传动的皮带轮，皮带轮设置在所述主轴本体的一端上；用于支撑所述主轴本体旋转的第一轴承、第二轴承和第三轴承，所述第一轴承、第二轴承和第三轴承均固定套设在所述主轴本体上；用于遮盖所述装配孔系的后端盖和前端盖。本实用新型提供的可对轴承轴向定位的主轴箱孔系结构，通过在孔系中加工出沟槽，安装前轴承轴向定位环和后轴承轴向定位环来实现必需的轴承轴向定位；这种设计简化了装配过程，提高了轴承的安装精度和整个主轴单元的稳定性。
The utility model provides a spindle box hole system structure that can axially position the bearing. The spindle box hole system structure that can axially position the bearing includes: an axle box, the axle box is provided with an assembly hole system, and a spindle body is arranged in the assembly hole system; a pulley for transmission, the pulley is arranged on one end of the spindle body; a first bearing, a second bearing and a third bearing for supporting the rotation of the spindle body, the first bearing, the second bearing and the third bearing are all fixedly sleeved on the spindle body; a rear end cover and a front end cover for covering the assembly hole system. The spindle box hole system structure that can axially position the bearing provided by the utility model realizes the necessary axial positioning of the bearing by machining a groove in the hole system and installing a front bearing axial positioning ring and a rear bearing axial positioning ring; this design simplifies the assembly process and improves the installation accuracy of the bearing and the stability of the entire spindle unit.
Description
Technical Field
The utility model relates to the technical field of numerical control machine tools, in particular to a spindle box hole system structure capable of positioning a bearing in the axial direction.
Background
In the design of a numerical control lathe spindle unit, the supporting and rotating precision and the stability of the spindle are critical to the performance of the whole spindle unit, and particularly, the numerical control lathe spindle unit meets the national mandatory standards of high precision, low temperature rise, long service life and the like, and has extremely high requirements on the precision and the installation precision of the spindle and a supporting bearing thereof.
In the traditional main shaft box body hole system structure, the axial positioning of a main shaft mainly depends on the hole shoulder and the end cover, and the structure has some problems in the processing process, firstly, the hole system processing can only adopt a horizontal installation mode due to the existence of the hole shoulder, so that the process of secondary clamping or turning around a rotary table for boring is necessary, errors can be introduced in the process, and secondly, the boring cutter is easy to fall down due to the weight of the boring cutter in the processing process due to the horizontal state of the hole system, so that the coaxiality accuracy of the hole system is further influenced.
However, due to the fact that the coaxiality precision of the spindle hole system is difficult to ensure in batch processing and the surface roughness of the hole is difficult to meet the quality requirement, problems such as abnormal temperature rise, too short bearing life, too poor spindle assembly precision and the like of the assembled spindle unit can occur, the forced requirements of the national standard cannot be met, although researchers propose some improvements, the problems are generally limited to adjusting the process flow or using more precise processing equipment without innovation from the fundamental structural design, and therefore, how to design a novel spindle box hole system structure can guarantee high precision and adapt to the requirement of mass production is a problem to be solved.
Disclosure of utility model
The utility model provides a spindle box hole system structure capable of positioning a bearing in the axial direction, which aims to solve the processing precision problem brought by the spindle axial positioning mode in the traditional spindle box hole system structure provided in the background art and the technical problem that the spindle box hole system structure cannot be suitable for mass production.
The spindle box hole system structure capable of positioning the bearing in the axial direction comprises an axle box, a belt pulley, a first bearing, a second bearing and a third bearing, wherein an assembly hole system is formed in the axle box, a spindle body is arranged in the assembly hole system, the belt pulley is used for driving, the belt pulley is arranged at one end of the spindle body, the first bearing, the second bearing and the third bearing are used for supporting the spindle body to rotate, the first bearing, the second bearing and the third bearing are fixedly sleeved on the spindle body, and a rear end cover and a front end cover are used for covering the assembly hole system and are respectively arranged at two ends of the assembly hole system.
Preferably, positioning grooves matched with the first bearing, the second bearing and the third bearing are formed in the assembly hole system.
Preferably, the rear end cover and the front end cover are provided with through holes, and the through holes are matched with the main shaft body.
Preferably, the rear end cover and the front end cover are provided with a plurality of mounting holes, and locking screws used for limiting the rear end cover and the front end cover are arranged in the mounting holes and are in threaded connection with the axle boxes.
Preferably, a sealing ring is arranged in the through hole, and the sealing ring is an annular ring made of elastic materials.
Preferably, the belt pulley is provided with a pin member for limiting, and the main shaft body is provided with a groove matched with the pin member.
Preferably, a sensor for detecting the rotation state of the main shaft body is arranged in the assembly hole system.
Compared with the related art, the headstock hole system structure capable of positioning the bearing in the axial direction has the following beneficial effects:
the utility model provides a main shaft box hole system structure capable of positioning a bearing in the axial direction, which comprises the following steps:
The axial positioning device has the advantages that the whole hole system is designed into a through hole by eliminating a hole shoulder for axial positioning of a bearing in the traditional design, the design allows a more efficient vertical mill machining process to be adopted, various problems possibly occurring in horizontal machining are avoided, when the vertical mill is used for machining, a main shaft hole system is in the vertical direction, deformation caused by dead weight of a cutter can be avoided, errors caused by secondary clamping or turning of a turntable are eliminated in the upper and lower machining of the whole length, meanwhile, the necessary axial positioning of the bearing is realized by machining grooves in the hole system and installing a front bearing axial positioning ring and a rear bearing axial positioning ring, the design simplifies the assembly process, and the installation accuracy of the bearing and the stability of the whole main shaft unit are improved.
Drawings
FIG. 1 is a schematic cross-sectional front view of a preferred embodiment of a headstock bore tie structure for axial positioning of bearings according to the present utility model;
FIG. 2 is an assembly view of a spindle and axle housing in accordance with the present utility model;
FIG. 3 is a schematic cross-sectional view of a conventional axle housing;
fig. 4 is an assembly diagram of a conventional spindle body and an axle housing.
The figure comprises a main shaft body, a pulley, a first bearing, a rear end cover, a second bearing, a third bearing, a front end cover, a first positioning shoulder hole, a second positioning shoulder hole and an axial positioning step, wherein the reference numerals in the figure comprise 1, an axle box, 2, a main shaft body, 3, a pulley, 4, a first bearing, 5, a rear end cover, 6, a second bearing, 7, a third bearing, 8, a front end cover, 9, a first positioning shoulder hole, 10 and a second positioning shoulder hole.
Detailed Description
The utility model will be further described with reference to the drawings and embodiments.
Referring to fig. 1-4 in combination, fig. 1 is a schematic cross-sectional front view of a preferred embodiment of a headstock hole structure capable of positioning a bearing in an axial direction according to the present utility model, fig. 2 is an assembled view of a main shaft and an axle box according to the present utility model, fig. 3 is a schematic cross-sectional view of a conventional axle box, and fig. 4 is an assembled view of a main shaft body and an axle box according to the present utility model.
The spindle box hole system structure capable of positioning the bearing in the axial direction comprises an axle box 1, a belt pulley 3, a first bearing 4, a second bearing 6 and a third bearing 7, wherein an assembly hole system is formed in the axle box 1, a spindle body 2 is arranged in the assembly hole system, the belt pulley 3 is used for transmission, the belt pulley 3 is arranged on one end of the spindle body 2, the first bearing 4, the second bearing 6 and the third bearing 7 are used for supporting the spindle body 2 to rotate, the first bearing 4, the second bearing 6 and the third bearing 7 are fixedly sleeved on the spindle body 2, a rear end cover 5 and a front end cover 8 are used for covering the assembly hole system, and the rear end cover 5 and the front end cover 8 are respectively arranged at two ends of the assembly hole system.
And positioning grooves matched with the first bearing 4, the second bearing 6 and the third bearing 7 are formed in the assembly hole system.
The rear end cover 5 and the front end cover 8 are respectively provided with a through hole, and the through holes are matched with the main shaft body 2.
The rear end cover 5 and the front end cover 8 are respectively provided with a plurality of mounting holes, and locking screws used for limiting the rear end cover 5 and the front end cover 8 are arranged in the mounting holes and are respectively in threaded connection with the axle box 1.
A sealing ring is arranged in the through hole, and the sealing ring is an annular ring made of elastic materials.
The belt pulley 3 is provided with a pin member for limiting, and the main shaft body 2 is provided with a groove matched with the pin member.
A sensor for detecting the rotation state of the main shaft body 2 is arranged in the assembly hole system.
It is worth to say that the structure shown in fig. 3 is a common way of designing a spindle unit of a numerically controlled lathe, the spindle body 1 is supported and assembled into a spindle hole system (hole system diagram 1) of the spindle box 1 through three sets of bearings, the spindle body 1 rotates under the transmission of a belt pulley, according to the national standard, when a spindle inner cone is assembled into a standard gauge spindle to detect a core rod, the circumferential runout of the spindle near the spindle end is not more than 0.008mm, the circumferential runout of the far end (300 mm) is not more than 0.012mm, in addition, the stable temperature rise of the spindle is not more than 20 degrees at room temperature, and the stable temperature is not more than 60 degrees, in order to achieve the forced standard, besides the high precision of the spindle, the bearing precision of the supporting spindle and the mounting precision of the bearing are also critical, because the bearing belongs to the standard part, the mounting precision of the bearing is also required by the national forced standard, namely, the spindle hole system for mounting the bearing on the spindle box is required to ensure high enough precision, and the dimensional precision, the dimensional tolerance and the surface roughness requirements of the spindle hole system shown in fig. 4 are very high, and the proper hole system and proper machining process and proper machining quality requirements are required.
The assembly diagram of fig. 3 and the hole diagram of the main shaft box main shaft can show that in the structure, the axial positioning of the bearing for supporting the main shaft is realized by adopting a hole shoulder mode, the hole processing mode can only be realized by adopting horizontal installation and boring by using a secondary clamping or rotating table through a turning boring process, errors are generated in the secondary clamping or rotating table through the common mechanical knowledge, and the boring cutter can only be processed in a horizontal mode due to the fact that the hole system is in a horizontal state (see fig. 4), the cutter is heavy, so that in actual batch processing, the coaxiality precision of the main shaft hole system is difficult to ensure, the surface roughness of the hole is difficult to meet the quality requirement due to the fact that the boring mode is adopted, the problems of abnormal temperature rise, too short bearing life, ultra-poor main shaft assembly precision and the like can be caused in the assembled main shaft unit, and the national standard requirements can not be met.
In order to solve the problems, the structure of the main shaft box body is improved by eliminating a bearing axial positioning hole shoulder 1 and a hole shoulder 2 in a main shaft hole system shown in fig. 3, enabling the main shaft hole system to be a through hole, processing grooves in the hole system for axial positioning of a bearing, and installing a front bearing axial positioning ring and a rear bearing axial positioning ring to realize necessary axial positioning of the bearing (the specific structure is shown in fig. 1 and 2), wherein the improvement aims to change the processing mode of the main shaft hole system into vertical grinding processing, and the main shaft hole system is vertical in processing, and the main shaft of the vertical grinding can be processed in an up-down full length dimension without secondary clamping or changing the processing direction because the hole system is a through hole. In addition, the vertical grinding spindle has no influence on machining precision, and the grinding process is adopted in the machining process, so that the surface roughness of the spindle hole system can be well ensured.
The improvement is practically applied to the main shaft unit of the NC-CT 63100 oblique lathe body numerical control lathe of the company, and satisfactory effects are obtained.
The working principle of the spindle box hole system structure capable of positioning the bearing in the axial direction is as follows:
The device designs the whole hole system as a through hole by eliminating a hole shoulder for axial positioning of a bearing in the traditional design, adopts a vertical mill processing technology when processing, avoids deformation of a main shaft hole system caused by dead weight of a cutter, eliminates errors caused by secondary clamping or turning of a rotary table during full-length up and down processing, improves the processing precision and the surface roughness of the main shaft hole system, and simultaneously realizes necessary axial positioning of the bearing by processing a positioning groove in the hole system and installing a front bearing axial positioning ring and a rear bearing axial positioning ring, simplifies the assembly process and improves the installation precision of the bearing and the stability of the whole main shaft unit.
Compared with the related art, the headstock hole system structure capable of positioning the bearing in the axial direction has the following beneficial effects:
The utility model provides a spindle box hole system structure capable of axially positioning a bearing, which is characterized in that a hole shoulder for axially positioning the bearing in the traditional design is omitted, the whole hole system is designed to be a through hole, a more efficient vertical mill machining process is allowed to be adopted, various problems possibly occurring in horizontal machining are avoided, the spindle hole system is in a vertical direction during vertical mill machining, deformation caused by the dead weight of a cutter can be avoided, errors caused by secondary clamping or turning of a turntable are eliminated during full-length up and down machining, meanwhile, the necessary axial positioning of the bearing is realized by machining grooves in the hole system, and a front bearing axial positioning ring and a rear bearing axial positioning ring are installed.
The device structure and the drawings of the present utility model mainly describe the principle of the present utility model, and in terms of the technology of the design principle, the arrangement of the power mechanism, the power supply system, the control system, etc. of the device is not completely described, but the specific details of the power mechanism, the power supply system, and the control system thereof can be clearly known on the premise that those skilled in the art understand the principle of the present utility model.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (7)
1. A headstock hole system structure capable of positioning a bearing in the axial direction, comprising:
the axle box is provided with an assembly hole system, and a main shaft body is arranged in the assembly hole system;
the belt pulley is used for transmission and is arranged at one end of the main shaft body;
The first bearing, the second bearing and the third bearing are used for supporting the main shaft body to rotate, and are fixedly sleeved on the main shaft body;
the rear end cover and the front end cover are used for covering the assembly hole system, and the rear end cover and the front end cover are respectively arranged at two ends of the assembly hole system.
2. The headstock hole system structure capable of positioning a bearing in the axial direction according to claim 1, wherein positioning grooves adapted to the first bearing, the second bearing and the third bearing are provided in the fitting hole system.
3. The headstock hole system structure capable of positioning a bearing in the axial direction according to claim 1, wherein the rear end cover and the front end cover are provided with through holes, and the through holes are matched with the main shaft body.
4. The headstock hole system structure capable of positioning a bearing in the axial direction according to claim 1, wherein a plurality of mounting holes are formed in the rear end cover and the front end cover, locking screws used for limiting the rear end cover and the front end cover are arranged in the mounting holes, and a plurality of locking screws are in threaded connection with the axle box.
5. A headstock hole system structure capable of positioning a bearing in an axial direction according to claim 3, wherein a seal ring is provided in the through hole, and the seal ring is an annular ring made of an elastic material.
6. The headstock hole system structure capable of positioning a bearing in the axial direction according to claim 1, wherein a pin for limiting is arranged on the belt pulley, and a groove matched with the pin is formed in the main shaft body.
7. The headstock hole system structure capable of positioning a bearing in the axial direction according to claim 1, wherein a sensor for detecting a rotation state of a main shaft body is provided in the fitting hole system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421160394.2U CN222359285U (en) | 2024-05-27 | 2024-05-27 | A spindle box hole system structure capable of axially positioning a bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421160394.2U CN222359285U (en) | 2024-05-27 | 2024-05-27 | A spindle box hole system structure capable of axially positioning a bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222359285U true CN222359285U (en) | 2025-01-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421160394.2U Active CN222359285U (en) | 2024-05-27 | 2024-05-27 | A spindle box hole system structure capable of axially positioning a bearing |
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| Country | Link |
|---|---|
| CN (1) | CN222359285U (en) |
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- 2024-05-27 CN CN202421160394.2U patent/CN222359285U/en active Active
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