Main shaft tapered roller bearing for machine tool

Abstract

A spindle tapered roller bearing for a machine tool relates to the technical field of tapered roller bearings and comprises an outer ring and an inner ring, and a plurality of rollers are arranged between the outer ring and the inner ring. The retainer is arranged between the outer ring and the inner ring; a flow guide structure is arranged on the inner ring and is used for guiding airflow to flow; in order to solve the problems that in the prior art, when a common tapered roller bearing is used on a machine tool spindle, heat is generated by friction and heat dissipation is insufficient due to high-speed rotation, the air inducing module is designed, and centrifugal airflow can be automatically formed during rotation through the arrangement of the air inducing module; therefore, external cold air can be automatically sucked in, the effect of exhausting internal hot air is achieved, then the temperature during high-speed rotation is greatly reduced, and the problems of clearance change caused by material thermal expansion and fatigue failure accelerated by long-term high temperature are effectively solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of tapered roller bearings, in particular to a main shaft tapered roller bearing for machine tools. BACKGROUND

[0002] Traditional tapered roller bearings are widely used in the field of machine tool spindle support due to their high load-carrying capacity and axial positioning accuracy.

[0003] In the prior art, a machine tool main shaft tapered roller bearing is usually composed of an outer ring, an inner ring, tapered rollers and a retainer, and relies on grease lubrication to reduce the friction between the raceway and the rollers.

[0004] However, with the rapid development of numerical control machine tools towards high speed and high efficiency, the frictional heat of the contact area between the rollers and the raceway will continue to accumulate during long-term high-speed rotation, causing the temperature inside the bearing to rise sharply. The thermal expansion of the metal material causes the bearing clearance to decrease or even disappear, causing the pre-tightening force to abnormally increase, aggravating wear and causing vibration, which seriously affects the machining accuracy. At the same time, the high-temperature environment accelerates the oxidation failure of the lubricating grease, and the rupture of the oil film causes dry friction, further increasing the temperature and forming a vicious cycle.

[0005] That is, the prior art has the following technical problems: ordinary tapered roller bearings applied to high-speed spindles are prone to friction overheating. Therefore, a main shaft tapered roller bearing for machine tools is proposed to solve the above problems. SUMMARY

[0006] In this embodiment, a main shaft tapered roller bearing for machine tools is provided to solve the problem that ordinary tapered roller bearings applied to high-speed spindles are prone to friction overheating in the prior art.

[0007] According to one aspect of the application, a main shaft tapered roller bearing for machine tools is provided, comprising:

[0008] An outer ring and an inner ring, a plurality of rollers being arranged between the outer ring and the inner ring;

[0009] A retainer arranged between the outer ring and the inner ring;

[0010] A flow guide structure arranged on the inner ring, the flow guide structure being used to guide the flow of air flow;

[0011] An air induction module fixedly arranged at a side edge position of the inner ring, the air induction module being used to automatically induce air when rotating.

[0012] The main shaft tapered roller bearing for machine tools, the plurality of rollers are arranged in a tapered structure.

[0013] The machine tool main shaft tapered roller bearing, the retainer is provided with a plurality of limiting grooves for limiting the rollers, and the rollers are arranged in the limiting grooves.

[0014] The machine tool main shaft tapered roller bearing, the outer ring and the inner ring are filled with lubricating grease.

[0015] The machine tool main shaft tapered roller bearing, one side of the inner ring extends a large flange, and the other side of the inner ring extends a small flange.

[0016] The machine tool main shaft tapered roller bearing, the air guide module comprises a fixed ring frame and a spiral blade, and the fixed ring frame is fixedly arranged at the side wall of the inner ring.

[0017] The machine tool main shaft tapered roller bearing, the fixed ring frame is coaxial with the inner ring.

[0018] The machine tool main shaft tapered roller bearing, the side wall of the fixed ring frame is fixedly connected with the spiral blade.

[0019] The machine tool main shaft tapered roller bearing, a plurality of spiral blades are arranged, and the plurality of spiral blades are equidistantly fixed at the side wall of the fixed ring frame.

[0020] The machine tool main shaft tapered roller bearing, the flow guide structure comprises flow guide holes and spiral flow guide blades, a plurality of flow guide holes are arranged on the inner ring, the plurality of flow guide holes are arranged in an annular array, and a plurality of spiral flow guide blades are fixedly connected to the side wall of the inner ring, and the plurality of spiral flow guide blades are arranged in an annular array.

[0021] Through the above-mentioned embodiments of the present application, in order to solve the problem of insufficient heat dissipation caused by friction due to high-speed rotation when the ordinary tapered roller bearing is used on the machine tool spindle in the prior art, the air guide module is designed, and through the arrangement of the air guide module, centrifugal airflow can be automatically formed during rotation, so that external cold air can be automatically sucked in, the internal hot air can be discharged, the temperature during high-speed rotation can be greatly reduced, and the problems of change of clearance caused by thermal expansion of materials and accelerated fatigue failure caused by long-term high temperature can be effectively alleviated. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0023] Figure 1The whole structure schematic diagram of the utility model is shown in the figure.

[0024] Figure 2 The structure schematic diagram of the outer ring and the inner ring of the utility model is shown in the figure.

[0025] Figure 3 The section schematic diagram of the outer ring and the inner ring of the utility model is shown in the figure.

[0026] Figure 4 The structure schematic diagram of the roller of the utility model is shown in the figure.

[0027] Figure 5 The whole section structure schematic diagram of the utility model is shown in the figure.

[0028] Figure 6 The schematic diagram of the flow guide structure of the utility model is shown in the figure.

[0029] In the figure,

[0030] 1, outer ring, 2, inner ring, 201, large baffle, 202, small baffle, 203, flow guide hole, 204, spiral flow guide piece, 3, roller, 4, retainer, 5, air guide module, 501, fixed ring frame, 502, spiral blade. DETAILED DESCRIPTION

[0031] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0032] Please refer to Figures 1-6 The machine tool main shaft tapered roller bearing, comprising:

[0033] The outer ring 1 and the inner ring 2, a plurality of rollers 3 are arranged between the outer ring 1 and the inner ring 2;

[0034] The retainer 4 is arranged between the outer ring 1 and the inner ring 2;

[0035] The inner ring 2 is provided with a flow guide structure, and the flow guide structure is used for guiding the flow of air flow;

[0036] The air guide module 5 is fixedly arranged at the side edge position of the inner ring 2, and the air guide module 5 is used for automatic air guide when rotating.

[0037] In order to solve the phenomenon of insufficient heat dissipation caused by frictional heat due to high-speed rotation when the ordinary tapered roller bearing is used on the main shaft of the machine tool in the prior art, the air guide module 5 is designed, which can automatically form a centrifugal airflow during rotation, so that the external cold air is automatically sucked in, the internal hot air is discharged, the temperature during high-speed rotation is greatly reduced, and the problems of change of clearance caused by thermal expansion of materials and accelerated fatigue failure caused by long-term high temperature are effectively alleviated.

[0038] The rollers 3 are provided in plurality, and the plurality of rollers 3 are in conical structure;

[0039] The retainer 4 is provided with a plurality of limiting grooves for limiting the rollers 3, and the rollers 3 are arranged in the limiting grooves;

[0040] The outer ring 1 and the inner ring 2 are filled with lubricating grease, and through the arrangement of the lubricating grease, the lubricating function during rolling can be achieved;

[0041] The inner ring 2 extends a large flange 201 on one side, and a small flange 202 on the other side, and through the arrangement of the large flange 201 and the small flange 202, the function of limiting the rollers 3 can be achieved;

[0042] The air guide module 5 includes a fixed ring frame 501 and a spiral blade 502, and the fixed ring frame 501 is fixedly arranged at the side wall position of the inner ring 2;

[0043] The fixed ring frame 501 and the inner ring 2 are coaxially arranged;

[0044] The side wall of the fixed ring frame 501 is fixedly connected with the spiral blade 502;

[0045] The spiral blade 502 is provided in plurality, and the plurality of spiral blades 502 are fixedly arranged at the side wall of the fixed ring frame 501 at equal intervals, and through the technical scheme, when the inner ring 2 rotates at high speed, the fixed ring frame 501 can be automatically driven to rotate coaxially, so that the spiral blade 502 rotates, and a centrifugal airflow is formed by the rotation of the spiral blade 502, so that the external cold air is sucked into the inner ring 2 and the inner ring 2, the airflow is circulated, and the internal hot air is discharged, and the function of automatic heat dissipation and cooling is achieved;

[0046] The flow guide structure comprises flow guide holes 203 and spiral flow guide fins 204, a plurality of flow guide holes 203 are arranged on the inner ring 2 in an annular array, and a plurality of spiral flow guide fins 204 are fixedly connected to the side wall of the inner ring 2 in an annular array, when the inner ring 2 rotates at high speed, the spiral flow guide fins 204 can also rotate, so that the spiral flow guide fins 204 further guide the wind, the air flows through the flow guide holes 203, the inner ring 2 can be cooled, the high temperature caused by the continuous high-speed rotation of the inner ring 2 is relieved, and the inner ring 2 is particularly suitable for use in a machine tool spindle.

[0047] The circuit and electronic components and modules are all prior art, and those skilled in the art can realize them without further description, and the content protected by the application does not involve improvement of software and methods.

[0048] The above only describes preferred embodiments of the application and is not used to limit the application, and those skilled in the art can make various changes and modifications to the application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A main shaft tapered roller bearing for machine tools, characterized by, Include: The outer ring (1) and the inner ring (2), a plurality of rollers (3) are arranged between the outer ring (1) and the inner ring (2); The cage (4) is arranged between the outer ring (1) and the inner ring (2); The inner ring (2) is provided with a flow guide structure for guiding airflow; Air guide module (5), the air guide module (5) is fixedly arranged at the side of the inner ring (2), and the air guide module (5) is used for automatic air guide when rotating.

2. Machine tool spindle tapered roller bearing according to claim 1, characterized in that The roller (3) is provided with a plurality of rollers (3), and the plurality of rollers (3) are in conical structure.

3. The machine tool spindle tapered roller bearing of claim 1, wherein: The cage (4) is provided with a plurality of limiting grooves for limiting the roller (3), and the roller (3) is arranged in the limiting groove.

4. The machine tool spindle tapered roller bearing of claim 1, wherein: The outer ring (1) and the inner ring (2) are filled with lubricating grease.

5. The machine tool spindle tapered roller bearing of claim 1, wherein: The inner ring (2) extends out a large baffle (201) at one side, and a small baffle (202) at the other side.

6. The machine tool spindle tapered roller bearing of claim 1, wherein: The air guide module (5) includes a fixed ring frame (501) and a spiral blade (502), and the fixed ring frame (501) is fixedly arranged at the side wall position of the inner ring (2).

7. A machine tool spindle tapered roller bearing according to claim 6, characterised in that: The fixed ring frame (501) and the inner ring (2) are coaxially arranged.

8. A machine tool spindle tapered roller bearing according to claim 6, characterised in that: The side wall of the fixed ring frame (501) is fixedly connected with the spiral blade (502).

9. A machine tool spindle tapered roller bearing according to claim 8, characterised in that: The spiral blade (502) is provided with a plurality of spiral blades (502), and the plurality of spiral blades (502) are equidistantly fixed at the side wall of the fixed ring frame (501).

10. The machine tool spindle tapered roller bearing of claim 1, wherein: The flow guide structure includes flow guide hole (203) and spiral flow guide piece (204), a plurality of flow guide holes (203) are formed in the inner ring (2), a plurality of flow guide holes (203) are arranged in annular array, and a plurality of spiral flow guide pieces (204) are fixedly connected with the side wall of the inner ring (2), a plurality of spiral flow guide pieces (204) are arranged in annular array.

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