CN216801703U - Heavy load main shaft structure - Google Patents

Abstract

The utility model discloses a heavy load main shaft structure which comprises a turbine, bearings II, bearing sleeves, bearing positioning sleeves, flanges and a main shaft, wherein the flanges are arranged at the right end of the main shaft; the utility model meets the requirement of high-speed heavy-load cutting of the numerical control machine tool, improves the reliability of equipment, reduces the failure rate, reduces the axial play amount of the main shaft, improves the axial rigidity of the main shaft and reduces the processing cost compared with the traditional main shaft while simplifying the structure.

Description

Heavy load main shaft structure

Technical Field

The utility model relates to the technical field of heavy load main shafts of numerical control machines, in particular to a heavy load main shaft structure.

Background

The numerical control machine tool has wide processing technology performance, can process complex workpieces such as straight-line cylinders, oblique-line cylinders, circular arcs, various threads, grooves, worms and the like, has various compensation functions of straight-line interpolation and circular-arc interpolation, and plays a good economic effect in the batch production of complex parts.

The high-speed heavy-load cutting of the numerical control machine tool is the future development direction, and the main shaft unit is the most important part of the high-speed heavy-load cutting machine tool. The traditional machine tool main shaft is divided into three types: 1. high precision and high rotation speed. The front and rear supports of the main shaft generally adopt paired angular contact ball bearings as supports, the axial precision and the radial precision can be very high, but the support mode has low rigidity and cannot be used for heavy load cutting; 2. high rigidity, low rotation speed. The front and rear supports of the main shaft generally adopt tapered roller bearings as supports, and the axial rigidity and the radial rigidity can be very high, but the supporting mode has low precision and low rotating speed and cannot be used for high-precision machine tools; 3. in order to obtain high precision, high rigidity and high rotating speed, a novel main shaft is generally adopted by the existing numerical control machine tool, the front support of the main shaft adopts an inner taper hole double-row cylindrical roller bearing, the middle part of the main shaft adopts a pair of angular contact ball bearings, and the rear support adopts an inner taper hole double-row cylindrical roller bearing; the spindle well solves the defects of the first two spindles, but the spindle has high cost and is vibrated during high-speed and heavy-load cutting. The three types of main shafts have corresponding defects and cannot meet the requirements in practical use, so that an improved technology is urgently needed in the market to solve the problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the existing defects, provides a heavy-load main shaft structure, meets the requirements of high-speed heavy-load cutting of a numerical control machine tool, improves the reliability of equipment, reduces the failure rate, reduces the axial play of the main shaft, improves the axial rigidity of the main shaft while simplifying the structure, reduces the processing cost compared with the traditional main shaft, and can effectively solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a heavy load main shaft structure, includes turbine, bearing II, bearing housing, bearing position sleeve, flange and main shaft, the flange sets up the right-hand member at the main shaft, be provided with the bearing position sleeve on the main shaft, the bearing housing sets up in the outside of bearing position sleeve, and the bearing housing passes through bolt fixed connection with the flange, bearing II sets up to two, one of them bearing II sets up in the left side of bearing housing, another one bearing II sets up between bearing housing and bearing position sleeve, and bearing position sleeve right side is provided with bearing III, and bearing III's right side is provided with set nut, the turbine is installed on the main shaft, and the left side of turbine is provided with bearing I.

Furthermore, the left and right sides of turbine respectively is provided with a lock nut I, and lock nut I is used for fixed to the turbine, fixes the turbine through lock nut I for it is convenient to fix, guarantees the firm of structure.

Furthermore, what bearing I adopted is deep groove ball bearing, radially guarantees the gyration precision through bearing I, and the axial is free, has avoided the main shaft to generate heat the back influence precision of temperature rise, carries out reliable support to the main shaft rear end, and the installation is simple under the prerequisite that satisfies the operation requirement, and deep groove ball bearing cost reduces a lot than using interior taper hole biserial cylindrical roller bearing, and the price/performance ratio just can show the improvement.

Further, what bearing II adopted is thrust ball bearing, is provided with lock nut II on the bearing position sleeve, and lock nut II is used for locking left bearing II, and the right-hand member of bearing position sleeve is provided with spacing arch, and spacing arch is right bearing II between bearing housing (6) and bearing position sleeve (7) is spacing, has improved high speed stability through bearing II greatly, and the main shaft is when bearing the alternating load, and anti-seismic performance also has very big improvement, prevents main shaft axial float, and thrust ball bearing simple structure has reduced the processing cost relative traditional main shaft.

Furthermore, be provided with lock nut III on the left main shaft of bearing position sleeve, lock nut III is used for locking bearing position sleeve, makes the lock bearing position sleeve convenient, convenient assembling through lock nut III.

Furthermore, the bearing III is an inner taper hole double-row cylindrical roller bearing, and bears radial force through the bearing III, so that the radial rigidity and the rotation precision of the main shaft are improved, and the front end of the main shaft is reliably supported.

Compared with the prior art, the utility model has the beneficial effects that:

1. the deep groove ball bearing is simple to install on the premise of meeting use requirements, the cost of the deep groove ball bearing is greatly reduced compared with that of an inner taper hole double-row cylindrical roller bearing, the cost performance can be obviously improved, and the bearing positioning sleeve is convenient to lock and convenient to assemble through the locking nut III.

2. The locking nut I is arranged on the thrust ball bearing, the turbine is fixed through the locking nut I, so that the fixing is convenient, the structural firmness is guaranteed, the high-speed stability is greatly improved through the bearing II, the anti-seismic performance is greatly improved when the main shaft bears alternating load, the axial movement of the main shaft is prevented, the thrust ball bearing is simple in structure, and the machining cost is reduced compared with the traditional main shaft.

3. The bearing III is arranged on the numerical control machine tool, and the radial force is borne by the bearing III, so that the radial rigidity and the rotation precision of the main shaft are improved, and the front end of the main shaft is reliably supported.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a right view of the structure of the present invention.

In the figure: 1 bearing I, 2 lock nut I, 3 turbines, 4 lock nut II, 5 bearing II, 6 bearing housing, 7 bearing position sleeve, 8 bearing III, 9 flange, 10 positioning nut, 11 main shafts, 12 lock nut III.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

Referring to fig. 1-3, the present invention provides a technical solution: a heavy load main shaft structure comprises a turbine 3, a bearing II 5, a bearing sleeve 6, a bearing locating sleeve 7, a flange 9 and a main shaft 11, wherein the flange 9 is arranged at the right end of the main shaft 11, the bearing locating sleeve 7 is arranged on the main shaft 11, a locking nut III 12 is arranged on the main shaft 11 on the left side of the bearing locating sleeve 7, the locking nut III 12 is used for locking the bearing locating sleeve 7, the bearing locating sleeve 7 is convenient to lock and assemble through the locking nut III 12, the bearing sleeve 6 is arranged on the outer side of the bearing locating sleeve 7, the bearing sleeve 6 is fixedly connected with the flange 9 through bolts, the number of the bearings II 5 is two, one bearing II 5 is arranged on the left side of the bearing sleeve 6, the other bearing II 5 is arranged between the bearing sleeve 6 and the bearing locating sleeve 7, the bearing locating sleeve 7 does not influence the bearing sleeve 6 when rotating, the bearing sleeve 6 is of a fixed structure, and the bearing II 5 adopts a thrust ball bearing, the bearing positioning sleeve 7 is provided with a locking nut II 4, the locking nut II 4 is used for locking a left bearing II 5, the right end of the bearing positioning sleeve 7 is provided with a limiting bulge, the limiting bulge limits the bearing II 5 between the bearing sleeve 6 and the bearing positioning sleeve 7, the high-speed stability is greatly improved through the bearing II 5, when the main shaft 11 bears alternating load, the anti-seismic performance is also greatly improved, the axial movement of the main shaft 11 is prevented, the thrust ball bearing is simple in structure, the processing cost is reduced compared with the traditional main shaft, the bearing III 8 is arranged on the right side of the bearing positioning sleeve 7, the bearing III 8 is an inner taper hole double-row cylindrical roller bearing, the radial force is borne through the bearing III 8, the radial rigidity of the main shaft 11 and the rotation precision of the main shaft 11 are improved, the front end of the main shaft is reliably supported, the positioning nut 10 is arranged on the right side of the bearing III 8, the turbine 3 is installed on the main shaft 11, the left side and the right side of the turbine 3 are respectively provided with a locking nut I2, the locking nuts I2 are used for fixing the turbine 3, the turbine 3 is fixed through the locking nuts I2, the fixing is convenient, the structural firmness is ensured, the left side of the turbine 3 is provided with a bearing I1, the bearing I1 adopts a deep groove ball bearing, the rotary precision is radially ensured through the bearing I1, the axial freedom is realized, the influence on the precision after the main shaft 11 is heated and raised is avoided, the rear end of the main shaft 11 is reliably supported, the installation is simple on the premise of meeting the use requirement, the cost of the deep groove ball bearing is greatly reduced compared with the cost of the deep groove ball bearing when an inner taper hole double-row cylindrical roller bearing is used, the cost performance can be obviously improved, the high-speed heavy-load cutting requirement of a numerical control machine tool is met, the reliability of the device is improved while the structure is simplified, the failure rate is reduced, the axial displacement of the main shaft is reduced, and the axial rigidity of the main shaft 11 is improved, the machining cost is reduced compared with the conventional main shaft 11.

When in use: the bearing I1 radially guarantees the gyration precision, the axial is free, influence the precision after having avoided main shaft 11 to generate heat the temperature rise, reliably support 11 rear ends of main shaft, it is simple to satisfy installation under the prerequisite of operation requirement, deep groove ball bearing cost is reduced a lot than using interior taper hole biserial cylindrical roller bearing, the price/performance ratio just can show and improve, bearing II 5 has improved high-speed stability greatly, main shaft 11 is when bearing the alternating load, anti-seismic performance also improves greatly, prevent 11 axial float of main shaft, thrust ball bearing simple structure, the processing cost has been reduced compared with traditional main shaft, bearing III 8 bears the radial force, improve the radial rigidity and the 11 gyration precisions of main shaft 11 of main shaft, reliably support the main shaft front end.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a heavy load main shaft structure, includes turbine (3), bearing II (5), bearing housing (6), bearing position sleeve (7), flange (9) and main shaft (11), its characterized in that: the flange (9) is arranged at the right end of the main shaft (11), the main shaft (11) is provided with the bearing positioning sleeve (7), the bearing sleeve (6) is arranged on the outer side of the bearing positioning sleeve (7), the bearing sleeve (6) is fixedly connected with the flange (9) through bolts, the bearings II (5) are arranged into two bearings, one of the two bearings is arranged on the left side of the bearing sleeve (6), the other bearing II (5) is arranged between the bearing sleeve (6) and the bearing positioning sleeve (7), the bearing III (8) is arranged on the right side of the bearing positioning sleeve (7), the positioning nut (10) is arranged on the right side of the bearing III (8), the turbine (3) is arranged on the main shaft (11), and the bearing I (1) is arranged on the left side of the turbine (3).

2. A heavy duty main shaft structure as recited in claim 1, wherein: the left side and the right side of turbine (3) respectively are provided with a lock nut I (2), and lock nut I (2) are used for fixing turbine (3).

3. A heavy duty main shaft structure as recited in claim 1, wherein: a deep groove ball bearing is adopted by the bearing I (1).

4. A heavy duty main shaft structure as recited in claim 1, wherein: the bearing II (5) adopts a thrust ball bearing, the bearing locating sleeve (7) is provided with a locking nut II (4), the locking nut II (4) is used for locking the bearing II (5) on the left side, the right end of the bearing locating sleeve (7) is provided with a limiting bulge, and the limiting bulge is right for limiting the bearing II (5) between the bearing sleeve (6) and the bearing locating sleeve (7).

5. A heavy duty main shaft structure as defined in claim 4, wherein: and a locking nut III (12) is arranged on the main shaft (11) on the left side of the bearing positioning sleeve (7), and the locking nut III (12) is used for locking the bearing positioning sleeve (7).

6. A heavy duty main shaft structure as recited in claim 1, wherein: the bearing III (8) is an inner taper hole double-row cylindrical roller bearing.

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