CN118548294A - Rolling bearing for machine tool spindle - Google Patents

Abstract

The present application provides a rolling bearing for a machine tool spindle, which relates to a rolling bearing, including an outer ring assembly, an inner ring assembly installed inside the outer ring assembly, a sealing mechanism installed on both sides of the outer ring assembly, an adding mechanism installed inside the outer ring assembly, and the adding mechanism including a placement groove opened inside the outer ring assembly. The present application realizes the fitting rotation of the rolling body and the elastic sponge pad through the provided adding mechanism and other structures, so that the elastic sponge pad sucks out the lubricating oil inside the placement groove, and the lubricating oil fits on the rolling body, and the lubricating oil lubricates the inner ring assembly through the fitting of the rolling body and the inner ring assembly, thereby reducing the friction of the rolling bearing for the machine tool spindle during use, and detecting the flow of the lubricating oil through the provision of a fluid sensor, so that the staff can add the lubricating oil in time, avoiding the inability to lubricate the inner ring assembly and the rolling body due to the reduction of the lubricating oil.

Description

A rolling bearing for machine tool spindle

Technical Field

The invention relates to the field of rolling bearings, and in particular to a rolling bearing for a machine tool spindle.

Background Art

The machine tool spindle refers to the axis on the machine tool that drives the workpiece or tool to rotate. It is mainly used to support transmission parts such as gears and pulleys in the machine, and transmit motion and torque, such as the machine tool spindle; some are used to clamp workpieces, such as the mandrel. The machine tool spindle refers to the axis on the machine tool that drives the workpiece or tool to rotate. It is usually composed of a spindle, bearings and transmission parts (gears or pulleys). Most machine tools have spindle components, except for planers, broaching machines and other machine tools whose main motion is linear motion. The motion accuracy and structural rigidity of the spindle components are important factors that determine the processing quality and cutting efficiency.

Rolling bearings are precision mechanical components that convert the sliding friction between the rotating shaft and the shaft seat into rolling friction, thereby reducing friction losses. Rolling bearings are generally composed of four parts: inner ring, outer ring, rolling element and cage. The function of the inner ring is to cooperate with the shaft and rotate with the shaft; the function of the outer ring is to cooperate with the bearing seat and play a supporting role.

In order to reduce the friction of the internal components of the rolling bearings and increase the service life of the rolling bearings for machine tool spindles, it is necessary to add lubricants to the inside of the rolling bearings.

After searching, Chinese patent number CN115899089A discloses a rolling bearing, including a first bearing ring and a second bearing ring and at least one row of rolling elements, wherein the bearing rings can rotate relative to each other around the rotation axis and include a raceway, the rolling elements roll on the raceway, the bearing rings also define the interior of the rolling bearing between them, the rolling elements are arranged in the interior of the rolling bearing, the rolling bearing is at least partially surrounded by a fluid, and a pumping device is also provided, at least one pumping device includes a plurality of pumping elements, wherein the plurality of pumping elements are arranged around at least one pumping device in a uniform or unevenly distributed manner. In particular, the distribution of the plurality of pumping elements can be selected so that excess lubricant is retained and/or pumped away.

However, the above prior art still has the following problems:

However, when adding lubricant to most of the existing rolling bearings for machine tool spindles, it is impossible to quickly add lubricant to the inside, and the rolling bearings need to be disassembled, which makes it inconvenient to add lubricant to the rolling bearings for machine tool spindles, affecting the use efficiency of the rolling bearings for machine tool spindles. Therefore, a rolling bearing for machine tool spindles is proposed.

Summary of the invention

The object of the present invention is to provide a rolling bearing for a machine tool spindle. By arranging structures such as an outer ring assembly, an inner ring assembly, a sealing mechanism and an adding mechanism, the rolling body and the inner ring assembly are fitted together so that the lubricating oil lubricates the inner ring assembly, thereby reducing the friction of the rolling bearing for the machine tool spindle during use. By arranging a sealing bolt, it is more convenient to add the lubricating oil inside the placement groove, thereby solving the problem that when adding lubricant to the rolling bearing for the machine tool spindle, the inside of the lubricating oil cannot be quickly added and the rolling bearing needs to be disassembled, which makes it inconvenient to add the lubricating oil to the rolling bearing for the machine tool spindle, thereby affecting the use efficiency of the rolling bearing for the machine tool spindle.

In order to achieve the above-mentioned invention object, the present invention provides the following technical solution: a rolling bearing for a machine tool spindle, comprising an outer ring assembly, an inner ring assembly is installed inside the outer ring assembly, sealing mechanisms are installed on both sides of the outer ring assembly, and an adding mechanism is installed inside the outer ring assembly;

The adding mechanism includes a placement groove opened inside the outer ring component, lubricating oil is placed inside the placement groove, and the inner bottom wall of the placement groove is provided with a plurality of corresponding connecting grooves in a ring array, and elastic sponge pads are fixedly connected inside the plurality of connecting grooves, and mounting grooves are opened on both sides of the placement groove, and a fluid sensor is installed inside the placement groove, and a mounting bolt is slidably clamped on the surface of the fluid sensor, and one end of the mounting bolt is threadedly connected to one of the elastic sponge pads.

As a preferred technical solution of the present application, the outer ring assembly includes an outer ring shell, the placement groove is opened inside the outer ring shell, the opposite sides of several elastic sponge pads are fitted with rolling bodies, the number of rolling bodies is several, the rolling bodies are rotatably connected to the inside of the outer ring shell, and the mounting bolts are threadedly connected to the outer ring shell.

As a preferred technical solution of the present application, the sealing mechanism includes threaded holes in a circular array on both sides of the outer ring shell, sealing rings are attached to both sides of the outer ring shell, and the surface of the sealing ring is threadedly connected with connecting bolts threadedly connected to the threaded holes.

As a preferred technical solution of the present application, the sealing ring is fixedly connected to the outer ring housing by connecting bolts, wherein one side of the sealing ring is fixedly connected with a sealing ring, and the sealing ring is fitted to the inner wall of the placement groove.

As a preferred technical solution of the present application, the sealing mechanism also includes a sealing plate adhered to the other side of the placement groove, the sealing plate is fixedly connected to the corresponding sealing ring, a feed groove is opened on the surface of the sealing plate, a sealing bolt slidably connected to the corresponding sealing ring is slidably inserted inside the feed groove, and the sealing plate is fixedly connected to the corresponding sealing ring by bolts.

As a preferred technical solution of the present application, the inner ring assembly includes an inner ring shell that is jointly bonded to opposite sides of several rolling elements, the inner ring shell is connected to the sealing ring and the outer ring shell, the outer arc surface of the inner ring shell is bonded to a retaining frame, several rolling elements are rotatably connected to the retaining frame, and the rolling elements are rotatably connected to the inner ring shell.

As a preferred technical solution of the present application, the inner ring housing is fixedly connected with pressure sensors in an annular array, several of the pressure sensors correspond to the inner wall of the outer ring housing, and the placement groove is sealed by a sealing ring, a sealing ring and a sealing plate.

As a preferred technical solution of the present application, the interior of the placement groove is fixedly connected with isolation blocks in a ring array, and several of the isolation blocks are connected to the placement groove, and the isolation blocks are in contact with the sealing ring.

Compared with the prior art, the present invention has the following beneficial effects:

In the scheme of this application:

1. Through the structures such as the outer ring assembly, the inner ring assembly, the sealing mechanism and the adding mechanism, when the rolling bearing for the machine tool spindle is used, the inner ring assembly is rotated, so that the rolling body rotates synchronously, so that the rolling body and the elastic sponge pad are fitted and rotated, so that the elastic sponge pad sucks out the lubricating oil in the placement groove, and the lubricating oil is fitted on the rolling body to lubricate the rolling body, and the rolling body is fitted with the inner ring assembly, so that the lubricating oil lubricates the inner ring assembly, so that the friction of the rolling bearing for the machine tool spindle is reduced when it is used, and the setting of the sealing bolt makes it more convenient to add the lubricating oil in the placement groove, and the setting of the fluid sensor detects the flow of the lubricating oil, so that the staff can add the lubricating oil in time, avoiding the reduction of the lubricating oil and causing the inner ring assembly and the rolling body to be unable to be lubricated, and solves the problem that the rolling bearing for the machine tool spindle in the prior art cannot quickly add lubricant to the inside when adding lubricant, and the rolling bearing needs to be disassembled, which makes it inconvenient to add lubricating oil to the rolling bearing for the machine tool spindle, affecting the use efficiency of the rolling bearing for the machine tool spindle;

2. Through the structures such as the outer ring assembly, the inner ring assembly, the sealing mechanism and the adding mechanism, when the rolling bearing for the machine tool spindle is in use, the outer ring assembly is sealed by the sealing ring, thereby preventing external debris from entering the interior of the rolling element and the inner ring assembly and affecting the use of the rolling bearing for the machine tool spindle. In addition, through the arrangement of the sealing ring and the sealing plate, the placement groove is sealed, thereby preventing the lubricating oil from leaking during use, which not only wastes the lubricating oil, but also affects the lubrication of the rolling bearing for the machine tool spindle during use. This solves the problem in the prior art that the friction between the inner ring assembly and the outer ring assembly is large, which affects the service life of the rolling bearing for the machine tool spindle, and the lubricating oil is more likely to leak, causing waste of the lubricating oil.

3. By setting up the outer ring assembly, inner ring assembly, sealing mechanism and adding mechanism and other structures, it is achieved that after the inner ring housing is used for a long time, the surface housing wears, causing the pressure sensor to leak, so that the pressure sensor fits with the rolling body, causing the rolling body to squeeze the pressure sensor, thereby reminding the staff, avoiding the untimely replacement of the inner ring housing, affecting the normal use of the rolling bearing for the machine tool spindle, and solving the problem in the prior art that the staff cannot timely detect the degree of wear of the inner ring housing, resulting in the failure to timely replace the inner ring housing, causing damage to the rolling bearing for the machine tool spindle, and affecting the normal use of the rolling bearing for the machine tool spindle.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a rolling bearing for a machine tool spindle provided by the present application;

FIG2 is a schematic diagram of the disassembled structure of a sealing mechanism and an outer ring assembly of a rolling bearing for a machine tool spindle provided by the present application;

FIG3 is a schematic diagram of the disassembled structure of a sealing ring and an outer ring housing of a rolling bearing for a machine tool spindle provided by the present application;

FIG4 is a schematic diagram of a partially disassembled structure of a rolling bearing for a machine tool spindle provided by the present application;

FIG5 is a schematic diagram of the disassembled structure of another sealing ring and outer ring assembly of a rolling bearing for a machine tool spindle provided by the present application;

FIG6 is a schematic structural diagram of the positional relationship between an isolation block and an outer ring assembly of a rolling bearing for a machine tool spindle provided by the present application;

FIG7 is a schematic diagram of the split structure of an outer ring assembly and an inner ring assembly of a rolling bearing for a machine tool spindle provided by the present application;

FIG8 is a schematic diagram of the disassembled structure of the outer ring housing and the adding mechanism of a rolling bearing for a machine tool spindle provided by the present application;

FIG9 is a schematic diagram of a disassembled structure of a placement groove and mounting bolts of a rolling bearing for a machine tool spindle provided by the present application;

FIG10 is an enlarged structural schematic diagram of point A in FIG2 of a rolling bearing for a machine tool spindle provided in the present application.

Indicated in the figure:

1. Outer ring assembly; 101. Outer ring housing;

2. Inner ring assembly; 201. Inner ring housing; 202. Cage; 203. Pressure sensor;

3. Sealing mechanism; 301. Threaded hole; 302. Sealing ring; 303. Connecting bolt; 304. Sealing ring; 305. Sealing plate; 306. Feeding trough; 307. Sealing bolt;

4. Adding mechanism; 401. Placement slot; 402. Connecting slot; 403. Elastic sponge pad; 404. Mounting slot; 405. Fluid sensor; 406. Mounting bolt; 407. Rolling element;

5. Isolation block.

DETAILED DESCRIPTION

To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

Please refer to Figures 1 to 10. The present invention provides a technical solution: a rolling bearing for a machine tool spindle, comprising an outer ring component 1, the outer ring component 1 comprising an outer ring housing 101, an inner ring component 2 is installed inside the outer ring component 1, and sealing mechanisms 3 are installed on both sides of the outer ring component 1. The sealing mechanisms 3 include threaded holes 301 in an annular array opened on both sides of the outer ring housing 101, and sealing rings 302 are attached to both sides of the outer ring housing 101. The surface of the sealing ring 302 is threadedly connected with a connecting bolt 303 threadedly connected to the threaded hole 301. The setting of the connecting bolt 303 makes it more convenient to disassemble the sealing ring 302. The connecting bolt 303 is used to connect the sealing ring 302 to the outer ring housing 101. The sealing ring 302 is fixedly connected to both sides of the outer ring housing 101 to protect the outer ring housing 101 and the rolling element 407, thereby preventing external debris from entering the interior of the outer ring housing 101 and affecting the lubrication of the rolling element 407 and the inner ring housing 201. The sealing ring 302 is fixedly connected to the outer ring housing 101 through a connecting bolt 303. A sealing ring 304 is fixedly connected to one side of one sealing ring 302. The sealing ring 304 is attached to the inner wall of the placement groove 401. The sealing mechanism 3 also includes a sealing plate 305 attached to the other side of the placement groove 401. The sealing ring 304 and the sealing plate 305 cooperate with each other to make the sealing ring 304 and the sealing plate 305 contact the placement groove 401. 01 is sealed, so that the lubricating liquid is more stable when used, the sealing plate 305 is fixedly connected to the corresponding sealing ring 302, and a feed groove 306 is provided on the surface of the sealing plate 305. A sealing plug 307 slidably connected to the corresponding sealing ring 302 is slidably inserted inside the feed groove 306. When the lubricating oil is used up, the sealing plug 307 is pulled out, so that the lubricating oil is injected into the placement groove 401 through the feed groove 306, so that it is more convenient for the staff to add lubricating liquid to the rolling bearing of the machine tool spindle. The sealing plate 305 is fixedly connected to the corresponding sealing ring 302 by bolts, and an adding mechanism 4 is installed inside the outer ring component 1. The adding mechanism 4 includes a 1, the placement groove 401 is fixedly connected with an isolation block 5 in an annular array inside the placement groove 401, and a plurality of isolation blocks 5 are connected to the placement groove 401. The isolation block 5 fits with the sealing ring 302. Through the setting of the isolation block 5, the interior of the placement groove 401 is divided into a plurality of empty grooves, so that the lubricating liquid can accurately replenish the elastic sponge pad 403, which facilitates the elastic sponge pad 403 to lubricate the rolling element 407 and the inner ring housing 201. The placement groove 401 is opened inside the outer ring housing 101, and lubricating oil is placed inside the placement groove 401. The inner bottom wall of the placement groove 401 is opened with a plurality of corresponding connecting grooves 402 in an annular array, and a plurality of connecting grooves 403 are connected to the inner bottom wall of the placement groove 401. 02 is fixedly connected with elastic sponge pads 403 inside, and rolling bodies 407 are attached to the opposite sides of several elastic sponge pads 403. When the rolling bearing is used for the machine tool spindle, the inner ring shell 201 is sleeved on the machine tool spindle, so that when the machine tool spindle is in use, the inner ring shell 201 rotates synchronously, so that the inner ring shell 201 drives the rolling bodies 407 to rotate synchronously, so that the rolling bodies 407 and the surfaces of the elastic sponge pads 403 rotate. The inner ring assembly 2 includes an inner ring shell 201 that is jointly attached to the opposite sides of several rolling bodies 407. The inner ring shell 201 is connected to the sealing ring 302 and the outer ring shell 101, and the outer arc surface of the inner ring shell 201 is attached with sealing rings 302 and 101. The holder 202 is provided so that the rolling element 407 is more stable when rotating, and the rolling element 407 is prevented from shaking. Several rolling elements 407 are rotatably connected with the holder 202, and the lubricating liquid in the placement groove 401 is sucked out through the elastic sponge pad 403, so that the lubricating liquid is attached to the rolling element 407 through the elastic sponge pad 403, so that the lubricating liquid is attached to the outer arc surface of the inner ring shell 201, so that the inner ring shell 201 and the rolling element 407 are lubricated synchronously, and the service life of the rolling bearing for the machine tool spindle is improved. The rolling element 407 is rotatably connected with the inner ring shell 201, and the interior of the inner ring shell 201 is fixedly connected with a ring array. The pressure sensor 203, several pressure sensors 203 correspond to the inner wall of the outer ring housing 101. Through the arrangement of the pressure sensor 203, when the inner ring housing 201 is used for a long time, the surface housing is worn, so that the pressure sensor 203 leaks out, so that the pressure sensor 203 fits with the rolling body 407, so that the rolling body 407 squeezes the pressure sensor 203, so as to remind the staff, avoid the inner ring housing 201 not being replaced in time, and affecting the normal use of the rolling bearing for the machine tool spindle. The placement groove 401 is sealed by the sealing ring 302, the sealing ring 304 and the sealing plate 305. The number of rolling bodies 407 is several, and the placement groove 401 Mounting grooves 404 are provided on both sides of the placement groove 401, and a fluid sensor 405 is installed inside the placement groove 401. Through the setting of the fluid sensor 405, the flow of the lubricating liquid inside the placement groove 401 is detected. The surface of the fluid sensor 405 is slidably clamped with a mounting bolt 406, and one end of the mounting bolt 406 is threadedly connected to one of the elastic sponge pads 403. When the fluid sensor 405 is used for a long time, the fluid sensor 405 is taken out of the placement groove 401 through the mounting bolt 406, which facilitates the replacement and disassembly of the fluid sensor 405. The rolling body 407 is rotatably connected to the inside of the outer ring housing 101, and the mounting bolt 406 is threadedly connected to the outer ring housing 101.

Specifically, when the rolling bearing for the machine tool spindle is working/in use: when the rolling bearing for the machine tool spindle is in use, the inner ring housing 201 is sleeved on the machine tool spindle, so that when the machine tool spindle is in use, the inner ring housing 201 rotates synchronously, thereby the inner ring housing 201 drives the rolling body 407 to rotate synchronously, so that the rolling body 407 and the surface of the elastic sponge pad 403 rotate, and the lubricating liquid inside the placement groove 401 is sucked out through the elastic sponge pad 403, so that the lubricating liquid is attached to the rolling body 407 through the elastic sponge pad 403, so that the lubricating liquid is attached to the outer arc surface of the inner ring housing 201, so that the inner ring housing 201 and the rolling body 407 are lubricated synchronously, thereby improving the service life of the rolling bearing for the machine tool spindle;

By setting the fluid sensor 405, the flow rate of the lubricating liquid inside the placement groove 401 is detected, so that when the lubricating oil is used up, the sealing plug 307 is pulled out, and the lubricating oil is injected into the inside of the placement groove 401 through the feed groove 306, which makes it more convenient for the staff to add lubricating liquid to the rolling bearing of the machine tool spindle, and by setting the isolation block 5, the inside of the placement groove 401 is divided into a plurality of empty grooves, so that the lubricating liquid can accurately replenish the elastic sponge pad 403, which facilitates the elastic sponge pad 403 to lubricate the rolling body 407 and the inner ring housing 201. When the fluid sensor 405 is used for a long time, the fluid sensor 405 is taken out of the placement groove 401 by the installation bolt 406, which facilitates the replacement and disassembly of the fluid sensor 405;

The sealing ring 302 is fixedly connected to both sides of the outer ring housing 101 by connecting bolts 303, so as to protect the outer ring housing 101 and the rolling element 407, and prevent external debris from entering the interior of the outer ring housing 101 and affecting the lubrication of the rolling element 407 and the inner ring housing 201. The sealing ring 304 and the sealing plate 305 cooperate with each other, so that the sealing ring 304 and the sealing plate 305 seal the placement groove 401, so that the lubricating fluid is more stable during use, and the setting of the connecting bolts 303 makes it more convenient to disassemble the sealing ring 302. At the same time, through the setting of the pressure sensor 203, when the inner ring housing 201 is used for a long time, the surface housing is worn, so that the pressure sensor 203 leaks out, so that the pressure sensor 203 fits with the rolling element 407, so that the rolling element 407 squeezes the pressure sensor 203, so as to remind the staff, and avoid the inner ring housing 201 being replaced in time, which affects the normal use of the rolling bearing for the machine tool spindle.

The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims (8)

1. The rolling bearing for the machine tool spindle is characterized by comprising an outer ring assembly (1), wherein an inner ring assembly (2) is arranged in the outer ring assembly (1), sealing mechanisms (3) are arranged on two sides of the outer ring assembly (1), and an adding mechanism (4) is arranged in the outer ring assembly (1);

The utility model provides an add mechanism (4) including offering inside standing groove (401) of outer lane subassembly (1), lubricating oil has been placed to the inside of standing groove (401), the interior bottom wall of standing groove (401) is annular array and has offered a plurality of corresponding intercommunication groove (402), a plurality of the inside equal fixedly connected with elastic foam-rubber cushion (403) of intercommunication groove (402), mounting groove (404) have all been offered to the both sides of standing groove (401), the internally mounted of standing groove (401) has fluid sensor (405), the surface sliding joint of fluid sensor (405) has mounting bolt (406), one end and one of them elastic foam-rubber cushion (403) threaded connection of mounting bolt (406).

2. The rolling bearing for a machine tool spindle according to claim 1, wherein the outer ring assembly (1) comprises an outer ring housing (101), the placement groove (401) is formed in the outer ring housing (101), rolling bodies (407) are attached to opposite sides of the plurality of elastic sponge pads (403), the number of the rolling bodies (407) is a plurality, the rolling bodies (407) are rotatably connected in the outer ring housing (101), and the mounting bolts (406) are in threaded connection with the outer ring housing (101).

3. The rolling bearing for a machine tool spindle according to claim 2, wherein the sealing mechanism (3) comprises threaded holes (301) formed in annular arrays on two sides of the outer ring housing (101), sealing rings (302) are attached to two sides of the outer ring housing (101), and connecting bolts (303) in threaded connection with the threaded holes (301) are connected to surfaces of the sealing rings (302) in a threaded manner.

4. A rolling bearing for a machine tool spindle according to claim 3, wherein the seal ring (302) is fixedly connected with the outer ring housing (101) by a connecting bolt (303), one side of one of the seal rings (302) is fixedly connected with a seal ring (304), and the seal ring (304) is attached to the inner wall of the placement groove (401).

5. The rolling bearing for a machine tool spindle according to claim 4, wherein the sealing mechanism (3) further comprises a sealing plate (305) attached to the other side of the placing groove (401), the sealing plate (305) is fixedly connected with the corresponding sealing ring (302), a feeding groove (306) is formed in the surface of the sealing plate (305), a sealing bolt (307) which is slidably connected with the corresponding sealing ring (302) is slidably inserted into the feeding groove (306), and the sealing plate (305) is fixedly connected with the corresponding sealing ring (302) through bolts.

6. The rolling bearing for a spindle of a machine tool according to claim 5, wherein the inner ring assembly (2) comprises an inner ring housing (201) which is jointly attached to opposite sides of a plurality of rolling elements (407), the inner ring housing (201) is communicated with the seal ring (302) and the outer ring housing (101), a retainer (202) is attached to an outer arc surface of the inner ring housing (201), the plurality of rolling elements (407) are rotatably connected with the retainer (202), and the rolling elements (407) are rotatably connected with the inner ring housing (201).

7. The rolling bearing for a machine tool spindle according to claim 6, wherein the inner part of the inner ring shell (201) is fixedly connected with pressure sensors (203) in an annular array, a plurality of the pressure sensors (203) correspond to the inner wall of the outer ring shell (101), and the placing groove (401) is sealed with the sealing plate (305) through a sealing ring (302) and a sealing ring (304).

8. A rolling bearing for a machine tool spindle according to claim 3, wherein the inside of the placement groove (401) is fixedly connected with isolation blocks (5) in a ring-shaped array, a plurality of the isolation blocks (5) are communicated with the placement groove (401), and the isolation blocks (5) are attached to the sealing ring (302).