CN210265486U

CN210265486U - Special main shaft high-precision bearing of CNC

Info

Publication number: CN210265486U
Application number: CN201920635339.7U
Authority: CN
Inventors: 雷周亮; 王新军; 潘加杰; 方洁平
Original assignee: Jiaxing Leite Precision Bearing Co ltd
Current assignee: Jiaxing Leite Precision Bearing Co ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-04-07
Anticipated expiration: 2029-05-06

Abstract

The utility model discloses a special main shaft high-precision bearing of CNC, including the outer lane, outer wall bonding outer heat dissipation layer internal face of outer lane, outer heat dissipation hole has been inlayed at outer lane right side middle part, the louvre left end accesss to outer heat dissipation layer right side middle part, the louvre right-hand member accesss to outer heat dissipation layer internal face, inner louvre has been inlayed to outer lane right side lower part, inner louvre left end accesss to inner heat dissipation layer outer wall, outer lane inner wall face side fixed connection draw-in groove outer wall, draw-in groove upper portion internal face fixed connection limit buckle outer wall, the utility model discloses through add inside and outside louvre and inside heat dissipation layer can strengthen the radiating effect and increase decontamination groove cleaning impurity, impurity can not accumulate, lubricating oil gets into the outer lane inside from the oil filler point, the steel ball can obtain the lubrication difficult wearing to and plated, the bearing can work efficiently, the wear resistance is improved, and the service life is prolonged.

Description

Special main shaft high-precision bearing of CNC

Technical Field

The utility model relates to a bearing, in particular to special main shaft high-precision bearing of CNC.

Background

At present, the structural design and the original retainer structure of the universal bidirectional thrust angular contact ball bearing can not meet the use requirements of a numerical control machine spindle, and the bearing produced in China does not pass the test in a bench test, so that the market urgently needs the structural design and the bearing retainer of the precision numerical control machine spindle bearing, which can meet the use requirements of the numerical control machine spindle.

The numerical control machine tool main shaft bearing of prior art can produce very big heat after long-time work, can't effectually get rid of it, make the bearing produce the thermal stress deformation and damage or warp, influence the wearability of bearing, and current numerical control machine tool main shaft bearing in use lubricating property is not good, the inconvenient clearance of impurity that inside steel ball produced in rolling, pile up inside the bearing easily, reduce bearing wearability, the heat that can't in time give off and the impurity that does not clear up lead to wearing and tearing each other to accelerate and the wearability reduces in bearing operation process, bearing life shortens, for this, we propose the special main shaft high-precision bearing of CNC.

SUMMERY OF THE UTILITY MODEL

A main object of the utility model is to provide a special main shaft high-precision bearing of CNC, through adding establish inside and outside louvre and inside and outside heat dissipation layer can strengthen the radiating effect and increase the clean impurity in decontamination groove, impurity can not store up, inside lubricating oil got into the outer lane from the oil filler point, the steel ball can obtain lubricated difficult wearing and tearing noise reduction, and plated the wearing layer between the locating hole of steel ball and steel ball, the bearing can high-efficient work, improve the wearability and strengthen rotatory flexibility, prolong bearing fatigue life, and simultaneously, can effectively solve the problem in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a special main shaft high-precision bearing of CNC, includes the outer lane, outer wall bonding outer heat dissipation layer internal face of outer lane, outer heat dissipation hole has been inlayed at outer lane right side middle part, the louvre left end accesss to outer wall middle part, the louvre right-hand member accesss to outer heat dissipation layer internal face, outer lane right side lower part inlays and is equipped with interior louvre, interior louvre left end accesss to inner heat dissipation layer outer wall, outer lane inner wall face fixed connection draw-in groove outer wall face, draw-in groove upper portion internal face fixed connection spacing knot outer wall face, it has the wearing layer locating hole of plating to inlay on the spacing knot internal face, the outer lane left side is the steel ball, the steel ball passes through the holder and inlays between outer lane and inner circle, outer lane and inner circle matched stack duplicate ball bearing and contact angle are, the bearing is installed on the main shaft of the precision numerical control machine tool.

Furthermore, the outer ring is provided with a lubricating hole in the upper side, the middle of the lubricating hole is transversely connected with the left end of the oil filling hole, the oil hole is located on the right side of the outer ring, and the middle of the right side of the outer ring is transversely embedded with a decontamination groove.

Furthermore, steel balls are placed in the wear-resistant layer plated positioning holes, and a plurality of steel balls are connected between the outer ring and the inner ring through the wear-resistant layer plated positioning holes.

Further, a plurality of decontamination grooves are formed in the outer ring close to the two sides of the clamping groove, and a plurality of lubricating holes are uniformly formed in the outer ring.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model relates to a through outer wall bonding outer heat dissipation layer internal face of outer lane, outer heat dissipation hole has been inlayed at outer lane right side middle part, the louvre left end leads to outer lane right side wall middle part, the louvre right-hand member leads to outer heat dissipation layer internal face, outer lane right side lower part inlays and is equipped with interior louvre, interior louvre left end leads to interior heat dissipation layer outer wall, the heat that steel ball rolling friction produced can in time transmit the heat to interior heat dissipation layer through interior louvre inside and outside, thereby play the heat dissipation effect through interior heat dissipation layer, through in time dispelling the heat, wherein the steel ball passes through the holder and inlays between outer lane and inner circle, the built-up duplex angular contact ball bearing, the contact angle is 40 degrees, the inner and outer lane ditch curvature value is different with general angular contact, the ditch limit has the broad groove, the holder structure can be both self-locking ball and can be, the left front end is provided with a double-row cylindrical roller bearing NN3020KTN1, and the right rear end is provided with a double-row cylindrical roller bearing NNU4924K/W33, so that the main shaft can bear axial force and also can bear great radial force, and the main shaft bearing of the precision numerical control machine tool is long in fatigue life.

2. The utility model has the advantages that the lubricating holes are arranged on the outer ring in a through way, the plurality of lubricating holes are arranged in the outer ring, the middle part of the lubricating hole is transversely connected with the left end of the lubricating hole, the oil hole is positioned on the right side of the outer ring, so that lubricating oil enters the inner part of the outer ring from the lubricating hole during work and can be uniformly distributed between the outer ring and the inner ring through the dispersion of the lubricating holes, the middle part of the right side of the outer ring is transversely embedded with a decontamination groove, impurities can be timely cleaned out without deposition, and then the effects of fully lubricating the steel ball and reducing the abrasion can be directly realized, the noise of the bearing is reduced, the rotation flexibility of the bearing is improved, the effects of increasing the abrasion resistance of the bearing and prolonging the service life can be indirectly realized, wherein the axial positioning can be realized on the main shaft in two directions by the contact angle of 30 degrees and, moreover, the tolerance of the race enables the race to have enough radial clearance with the bearing seat hole to ensure that the thrust bearing only bears axial load, and the machining of the bearing seat hole is simplified.

3. The utility model discloses a plating the wearing layer and directly having improved the wearability of bearing between the locating hole of steel ball and steel ball, change to short with axial dimension, the many new structure of holder of rolling element is in order to increase rated load, and use the nylon holder of moulding plastics in order to improve bearing limit speed, be difficult to the design for improving because of axial dimension overlength holder structure axial dimension simultaneously, the lasso grooving that causes provides the space for the holder structure, can reach the imported bearing level through the bench test and the experimental each item index of installation, the difficult problem of this model bearing localization has been solved.

Drawings

Fig. 1 is the utility model relates to a CNC special main shaft high-precision bearing's overall structure schematic diagram.

Fig. 2 is the schematic diagram of the front structure of the steel ball part of the spindle high-precision bearing for CNC machine.

Fig. 3 is the utility model relates to a CNC special main shaft high-precision bearing's positive structure schematic diagram of outer lane.

Fig. 4 is the utility model relates to a special main shaft high-precision bearing's of CNC outer lane cross-sectional structure sketch map.

Fig. 5 is the utility model relates to a special main shaft high-precision bearing of CNC overlook cross-sectional structure sketch map.

In the figure: 1. an outer heat-dissipating layer; 2. an outer ring; 3. a steel ball; 4. an inner ring; 5. an inner heat dissipation layer; 6. a bearing body; 7. an oil filler hole; 8. a lubrication hole; 9. a card slot; 10. a limit buckle; 11. a decontamination tank; 12. plating a positioning hole of the wear-resistant layer; 13. external heat dissipation control; 14. internal heat dissipation holes; 15. a cage.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-5, a spindle high precision bearing special for CNC comprises an outer ring 2, the outer wall surface of the outer ring 2 is bonded with the inner wall surface of an outer heat dissipation layer 1, the middle part of the right side of the outer ring 2 is embedded with an outer heat dissipation hole 13, the left end of the heat dissipation hole 13 is led to the middle part of the right wall surface of the outer ring 2, the right end of the heat dissipation hole 13 is led to the inner wall surface of the outer heat dissipation layer 1, the lower part of the right side of the outer ring 2 is embedded with an inner heat dissipation hole 14, the left end of the inner heat dissipation hole 14 is led to the outer wall surface of an inner heat dissipation layer 5, the inner wall surface side of the outer ring 2 is fixedly connected with the outer wall surface of a clamping groove 9, the inner wall surface of the upper part of the clamping groove 9 is fixedly connected with the outer wall surface of a limit buckle 10, the inner wall surface of the limit buckle 10 is, the groove edges of the outer ring 2 and the inner ring 4 are provided with wide frame grooves, and the bearing is arranged on a main shaft of the precision numerical control machine tool.

2 upside openings in outer lane are equipped with lubrication hole 8, 8 middle part transverse connection oil filler point 7 left ends in lubrication hole, oilhole 7 is located 2 right sides in outer lane, 2 right sides middle parts in outer lane transversely inlay and be equipped with decontamination groove 11.

The steel balls 3 are placed in the wear-resistant layer plated positioning holes 12, and the steel balls 3 are connected between the outer ring 2 and the inner ring 4 through the wear-resistant layer plated positioning holes 12.

The inner portion of the outer ring 2 is close to the two sides of the clamping groove 9 and is provided with a plurality of decontamination grooves 11, and the inner portion of the outer ring 2 is evenly provided with a plurality of lubricating holes 8.

It should be noted that the utility model relates to a CNC special main shaft high precision bearing, the working principle is as follows, firstly, the outer wall surface of the outer ring 2 is bonded with the inner wall surface of the outer heat dissipation layer 1, the middle part of the right side of the outer ring 2 is embedded with the outer heat dissipation hole 13, the steel ball 3 is embedded between the outer ring 2 and the inner ring 4 through the retainer 15, and the left end of the heat dissipation hole 13 is led to the middle part of the right wall surface of the outer ring 2, the right end of the heat dissipation hole 13 is led to the inner wall surface of the outer heat dissipation layer 1, the lower part of the right side of the outer ring 4 is embedded with the inner heat dissipation hole 14, the left end of the inner heat dissipation hole 14 is led to the outer wall surface of the inner heat dissipation layer 5, the heat generated by the rolling friction of the steel ball 3 can be transmitted to the inner and outer heat dissipation layers through, the inner wall surface of a limit buckle 10 is embedded with a wear-resistant layer-plated locating hole 12, the wear resistance of the steel ball 3 is increased when the steel ball and the wear-resistant layer-plated locating hole 12 are in sliding friction, the upper side of an outer ring 2 is provided with a lubrication hole 8, the middle part of the lubrication hole 8 is transversely connected with the left end of an oil filling hole 7, the oil hole 7 is positioned on the right side of the outer ring 2, the middle part of the right side of the outer ring 2 is transversely embedded with a decontamination groove 11, when the steel ball has dirt, the lubricating oil can enter between the outer ring 2 and an inner ring 4 through the oil hole 7 and the lubrication hole 8, a duplex ball bearing is assembled again, the contact angle is 40 degrees, the groove curvature values of the inner ring 4 and the outer ring 2 are different in that the groove edge is provided with a wide frame groove, the novel and special frame structure is maintained, the steel ball can be used, the main shaft can bear axial force and also can bear large radial force.

The structure of the bearing comprises an outer heat dissipation layer 1, an outer ring 2, a steel ball 3, an inner ring 4, an inner heat dissipation layer 5, a bearing body 6, an oil filling hole 7, a lubricating hole 8, a clamping groove 9, a limiting buckle 10, a decontamination groove 11, a wear-resistant layer plating positioning hole 12, an outer heat dissipation control 13, an inner heat dissipation hole 14 and a retainer 15, wherein the components are all universal standard components or components known by technicians in the field, and the structure and the principle of the bearing can be known by the technicians or conventional experimental methods.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a special main shaft high-precision bearing of CNC, includes outer lane (2), its characterized in that: the outer heat dissipation layer (1) inner wall surface is bonded to the outer wall surface of the outer ring (2), an outer heat dissipation hole (13) is embedded in the middle of the right side of the outer ring (2), the left end of the heat dissipation hole (13) is led to the middle of the right wall surface of the outer ring (2), the right end of the heat dissipation hole (13) is led to the inner wall surface of the outer heat dissipation layer (1), an inner heat dissipation hole (14) is embedded in the lower portion of the right side of the outer ring (2), the left end of the inner heat dissipation hole (14) is led to the outer wall surface of the inner heat dissipation layer (5), the inner wall surface side of the outer ring (2) is fixedly connected with the outer wall surface of the clamping groove (9), the inner wall surface of the upper portion of the clamping groove (9) is fixedly connected with a limit buckle (10) outer wall surface, a wear-resistant layer plating positioning hole (12) is embedded in the inner wall surface of, the double-joint angular contact ball bearing is characterized in that the outer ring (2) and the inner ring (4) are assembled into a double-joint angular contact ball bearing, a contact angle is 30-40 degrees, groove edges of the outer ring (2) and the inner ring (4) are provided with wide frame grooves, and the bearing is installed on a main shaft of a precision numerical control machine.

2. The CNC-specific spindle high-precision bearing according to claim 1, characterized in that: the side-through of outer lane (2) upside is equipped with lubricated hole (8), lubricated hole (8) middle part transverse connection oil filler point (7) left end, oilhole (7) are located outer lane (2) right side, outer lane (2) right side middle part transversely inlays and is equipped with decontamination groove (11).

3. The CNC-specific spindle high-precision bearing according to claim 1, characterized in that: the steel balls (3) are placed in the wear-resistant layer plated positioning holes (12), and a plurality of steel balls (3) are connected between the outer ring (2) and the inner ring (4) through the wear-resistant layer plated positioning holes (12).

4. The CNC-specific spindle high-precision bearing according to claim 1, characterized in that: the inner portion of the outer ring (2) is close to the two sides of the clamping groove (9) and is provided with a plurality of decontamination grooves (11), and a plurality of lubricating holes (8) are evenly formed in the inner portion of the outer ring (2).