Machine tool spindle bearing structure

Abstract

The present invention belongs to the technical field of machine tool accessories, and specifically is a machine tool spindle bearing structure, including a shaft body; a support seat is provided at the end of the shaft body, a bearing body is connected inside the support seat, the bearing body includes an outer ring and an inner ring, a retaining frame is provided between the outer ring and the inner ring, a rolling ball is provided on the side wall of the retaining frame, and an oil storage tank is installed on the top of the support seat; the present invention controls the shaft body to rotate at a high speed, when lubricating oil drips onto the side wall of the inner ring rotating at a high speed, the inner ring can quickly centrifuge the oil droplets, and the ejected oil droplets will collide with the inner wall of the outer ring, so that the oil droplets are dispersed into oil mist with smaller particles under the working action of the inner ring and the outer ring, and are evenly distributed in the chamber between the inner ring and the outer ring, so that the working parts of the inner ring, the retaining frame and the outer ring can be fully and evenly contact lubricated, thereby improving the lubrication quality and lubrication efficiency of the machine tool spindle bearing.

Description

Technical Field

[0001] The invention belongs to the technical field of machine tool accessories, in particular to a machine tool spindle bearing structure. Background Art

[0002] Machine tool spindle bearings are spindle bearings for precision machine tools and similar equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. For machine tool processing, the stability of the bearing rotation directly determines the accuracy of the machine tool; some existing bearings are equipped with a sealing structure, which makes it inconvenient to add lubricating oil and cannot effectively maintain the bearings. In addition, the bearings are very prone to overheating under harsh operating conditions, which reduces the accuracy of machine tool processing.

[0003] A Chinese patent with the publication number CN214404395U discloses a high-strength machine tool spindle bearing structure, including a machine tool spindle, a housing is sleeved on the machine tool spindle, two bearings are connected between the housing and the machine tool spindle, each of the bearings includes a retainer, a plurality of pockets are provided inside the retainer, grooves are provided on both sides of the retainer, a plurality of channels are provided inside the grooves, each of the channels is connected to the pockets, and the channels are connected to a material guide channel; the housing is connected to a feed block, a guide block is connected to the lower end of the housing, a flow tube is provided inside the feed block and the guide block, a plurality of guide cavities are provided on both sides of each bearing, each of the guide cavities is connected to a material pipe with the flow tube, a sealing groove is provided inside the feed block and the guide block, and the sealing groove is connected to a material stopper assembly. The above structure is convenient for adding lubricating oil, can effectively maintain the bearing, avoid overheating, and improve the accuracy of machine tool processing.

[0004] However, when the machine tool spindle bearing structure in the above technology is refueled and maintained, after the lubricating oil enters the material guide cavity through the material pipe, it is difficult for the lubricating oil to evenly and fully contact the working surface of the bearing, resulting in a reduction in the actual utilization rate of the lubricating oil. In addition, the lubricating oil can only be evenly applied after the bearing reciprocates, which reduces the lubrication and maintenance efficiency of the bearing.

[0005] Therefore, the present invention provides a machine tool spindle bearing structure. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the machine tool spindle bearing structure described in the present invention comprises a shaft body; a support seat is provided at the end of the shaft body, a bearing body is connected to the inside of the support seat, the bearing body comprises an outer ring connected to the support seat, an inner ring is rotatably connected to the inside of the outer ring, a retaining frame is provided between the outer ring and the inner ring, a group of rolling balls respectively matched with the inner ring and the outer ring are provided on the side wall of the retaining frame, an oil storage tank is installed at the top of the support seat, and the support seat and the outer ring side wall corresponding to one side of the oil storage tank are respectively provided with oil inlet grooves that are interconnected, an oil guide pipe is connected between the top of the oil inlet groove and the inside of the oil storage tank, and a control valve is installed on the oil guide pipe; when the machine tool spindle bearing structure in the prior art is refueled and maintained, it is difficult to evenly and fully mix with the bearing after the lubricating oil enters the guide cavity through the material pipe. The inner ring and the outer ring are in contact with each other, and the inner ring and the outer ring are in contact with each other, so that the ...

[0008] Preferably, an oil collecting ring of water-absorbing material is connected to the inner ring side wall of the outer ring, a magnetic block is provided on the side wall of the inner ring, a slide groove is provided at the inner ring side wall corresponding to the outer ring and the magnetic block, a pressure block attracted by the magnetic block is slidably connected inside the slide groove, an elastic member is connected between the pressure block and the inner end of the slide groove, and a pressure plate is connected to the inner wall of the support seat corresponding to one side of the slide groove; when a part of the mist-like lubricating oil falls to the bottom of the oil collecting ring (which can be a sponge material) under its own gravity, the oil collecting ring can transport the lubricating oil to the top position corresponding to the pressure block, when the magnetic block on the shaft body rotates to a position close to the pressure block, the pressure block slides toward one side of the pressure plate under the attraction of the magnetic block, and squeezes the oil collecting ring between the two, so that the lubricating oil inside the oil collecting ring is squeezed out and falls onto the rotating shaft again from both sides of the pressure plate, so that the lubricating oil can be thrown out and crushed again by using the high-speed rotating shaft, thereby increasing the amount of mist-like oil droplets inside the bearing, and enabling the lubricating oil to have a lasting and reciprocating lubrication effect on the bearing.

[0009] Preferably, the side wall of the support seat is in contact with the end face of the outer ring, the end of the shaft body extends to the outer end of the support seat and is connected to a rotating rod, and the other end of the rotating rod is provided with a fan blade; by arranging the side wall of the support seat to be in contact with the end face of the outer ring, the chamber between the outer ring and the inner ring can be effectively sealed, reducing the outflow of mist-like oil droplets or contamination by external impurities. At the same time, when the shaft body rotates, it can also drive the fan blades to rotate synchronously through the rotating rod, so that the fan blades can have the effect of cooling the bearing, reducing the situation where the internal heat of the bearing is difficult to dissipate due to sealing.

[0010] Preferably, a sleeve for covering the fan blades is connected to the side wall of the support seat, and heat dissipation grooves are respectively provided on the two side walls of the support seat close to and away from the fan blades, and an elastic paddle is connected to the side wall of the support seat corresponding to the side of the heat dissipation groove close to the fan blades; when the shaft drives the fan blades to rotate inside the copper sleeve, an airflow flowing toward the side away from the support seat will be formed in the sleeve. At this time, the negative pressure chamber in the sleeve can cause the previously closed paddle to open, so that the external airflow enters from the heat dissipation groove away from the sleeve, and after flowing through the inside of the support seat, it flows out from the heat dissipation groove close to the sleeve, thereby more efficiently bringing out the heat inside the support seat, and when the bearing is in a non-working state, the elastic paddle will automatically reset and close, thereby sealing the heat dissipation groove and reducing the external dust and impurities from flowing into the inside of the support seat and polluting the bearing.

[0011] Preferably, support rods are symmetrically connected to the inner wall of the sleeve, and the ends of the two support rods close to each other are commonly fixedly connected to a rotating sleeve, a rotating ring is rotatably connected inside the rotating sleeve, a gravity block is inlaid and installed on the inner bottom end of the rotating ring, the fan blade is fixedly connected to the end of the rotating ring, the free end of the rotating rod is located inside the rotating ring, and a sliding cavity is symmetrically opened on the inner ring side wall of the rotating ring, a clamping plate of magnetic material is slidably connected inside the sliding cavity, a spring is connected between the clamping plate and the inner end of the sliding cavity, and an electromagnet that can repel the clamping plate is installed on the support rod; when the bearing is in a relatively low speed operation and no heat dissipation treatment is required, the clamping plate is retracted inside the sliding cavity and there is a gap between it and the rotating rod, so that the rotating rod and the rotating ring are in a separated state. When the shaft rotates, it no longer drives the fan blades to rotate, thereby reducing the situation where the fan blades generate greater resistance to the shaft when rotating. When the bearing is in long-term high-speed operation and needs heat dissipation, the electromagnet works and repels the two clamping plates, so that the two clamping plates slide to one side of the rotating rod respectively and clamp the rotating rod. At this time, when the shaft rotates, it can drive the swivel in the swivel sleeve through the clamping plate, so that the heat dissipation work of the fan blades can be carried out smoothly. By arranging a gravity block inside the swivel, the swivel can adjust its own position under the action of the gravity block when it is stationary, until the two clamping plates on the swivel and the electromagnet are on the same vertical plane, so that the electromagnet can drive the clamping plates to work stably.

[0012] Preferably, the setting position of the heat dissipation groove corresponds to the position of the electromagnet, and the end of the paddle is connected to an adsorption block, and the electromagnet can attract the adsorption sheet when it is working; when the electromagnet is working, the electromagnet can synchronously attract the adsorption sheet at the end of the paddle, so that the paddle can be opened more effectively, thereby facilitating the flow of gas inside the support seat, further improving the heat dissipation effect of the support seat.

[0013] Preferably, the heat dissipation groove is arranged at the bottom end of the side wall of the support seat, and the end of the paddle away from the fan blades and located at the bottom end of the support seat is connected to a filter layer, and the other end of the filter layer is connected to the inner wall of the support seat; when the support seat dissipates heat and the paddle away from the fan blades is opened, the filter layer located at the end of the paddle can filter impurities in the flowing gas, thereby further reducing the contamination of the bearing by external impurities when dissipating heat.

[0014] Preferably, the free end of the paddle connected to the filter layer faces downward, the filter layer is composed of sponge material, and a wavy elastic strip is connected to the inside of the filter layer, a plurality of pores are provided on the side wall of the elastic strip, and an oil outlet groove is respectively provided on the outer ring corresponding to the bottom end of the filter layer and the support seat, and an electromagnetic valve is installed inside the oil outlet groove; when the bearing dissipates heat, the paddle can drive the elastic strip and the filter layer to open at the same time, and the bottom end of the filter layer can absorb the lubricating oil in the oil outlet groove; when the bearing dissipates heat, the paddle can drive the elastic strip to contract when it is reset, and use the contracted elastic strip to squeeze out the lubricating oil absorbed inside, and when the lubricating oil is squeezed out, the dust and impurities intercepted by the filter layer can be brought out, thereby achieving a "self-cleaning" effect on the filter layer, improving the continuous working ability of the filter layer, and at the same time, the waste oil and impurities in the oil outlet groove can be discharged together by controlling the opening of the electromagnetic valve, thereby conveniently maintaining the bearing.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The machine tool spindle bearing structure provided by the present invention controls the high-speed rotation of the shaft body. When the lubricating oil drips onto the side wall of the high-speed rotating inner ring, the inner ring can quickly and centrifugally throw out the oil droplets, and the thrown oil droplets will collide with the inner wall of the outer ring, so that the oil droplets are dispersed into oil mist with smaller particles under the working action of the inner ring and the outer ring, and are evenly distributed in the chamber between the inner ring and the outer ring, so that the working parts of the inner ring, the retaining frame and the outer ring can be fully and evenly contact lubricated, thereby improving the lubrication quality and lubrication efficiency of the machine tool spindle bearing.

[0017] 2. The machine tool spindle bearing structure provided by the present invention has a structure in which when a part of the mist-like lubricating oil falls to the bottom of the oil collecting ring under its own gravity, the oil collecting ring can transport the lubricating oil to the top position corresponding to the pressure block. When the magnetic block on the shaft body rotates to a position close to the pressure block, the pressure block slides toward one side of the pressure plate under the attraction of the magnetic block, and squeezes the oil collecting ring located between the two, so that the lubricating oil inside the oil collecting ring is squeezed out and falls onto the rotating shaft again from both sides of the pressure plate, so that the lubricating oil can be thrown out and crushed again by using the high-speed rotating shaft, thereby increasing the amount of mist-like oil droplets inside the bearing and enabling the lubricating oil to have a lasting and reciprocating lubrication effect on the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the present invention;

[0022] Figure 3 yes Figure 2 Sectional view at AA in the middle;

[0023] Figure 4 is a schematic diagram of the structure of the filter layer in the second embodiment;

[0024] In the figure: shaft 1, support seat 2, outer ring 3, inner ring 4, retaining frame 5, rolling ball 6, oil storage tank 7, oil inlet groove 8, oil guide pipe 9, control valve 10, oil collecting ring 11, magnetic block 12, pressure block 13, elastic member 14, pressure plate 15, rotating rod 16, fan blade 17, sleeve 18, heat dissipation groove 19, paddle 20, support rod 21, rotating sleeve 22, rotating ring 23, gravity block 24, clamping plate 25, electromagnet 26, adsorption block 27, filter layer 28, elastic strip 29, oil outlet groove 30, solenoid valve 31. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Embodiment 1:

[0027] See also Figure 1-Figure 3 As shown, the machine tool spindle bearing structure described in the embodiment of the present invention includes a shaft body 1; a support seat 2 is provided at the end of the shaft body 1, and a bearing body is connected to the inside of the support seat 2, and the bearing body includes an outer ring 3 connected to the support seat 2, and an inner ring 4 is rotatably connected inside the outer ring 3, and a retaining frame 5 is provided between the outer ring 3 and the inner ring 4, and a group of rolling balls 6 respectively matched with the inner ring 4 and the outer ring 3 are provided on the side wall of the retaining frame 5, and an oil storage tank 7 is installed on the top of the support seat 2, and the support seat 2 and the outer ring 3 side walls corresponding to one side of the oil storage tank 7 are respectively provided with mutually connected oil inlet grooves 8, and an oil guide pipe 9 is connected between the top of the oil inlet groove 8 and the inside of the oil storage tank 7, and a control valve 10 is installed on the oil guide pipe 9; when the machine tool spindle bearing structure in the prior art is refueled and maintained, after the lubricating oil enters the inside of the guide cavity through the material pipe, it is difficult to evenly and fully mix with the working of the bearing. The bearing body of the present invention is in contact with the surface, resulting in a decrease in the actual utilization rate of the lubricating oil, and the lubricating oil can only be evenly applied after the bearing reciprocates, which reduces the lubrication and repair efficiency of the bearing; when lubrication is needed, the bearing body of the present invention controls the shaft body 1 to rotate at a high speed, and at the same time the control valve 10 is opened, so that the lubricating oil in the oil storage tank 7 can flow from the oil guide pipe 9 and the oil inlet groove 8 between the inner ring 4 and the outer ring 3. When the lubricating oil drips onto the side wall of the high-speed rotating inner ring 4, the inner ring 4 can quickly throw out the oil droplets centrifugally, and the thrown oil droplets will collide with the inner wall of the outer ring 3, so that the oil droplets are dispersed into oil mist with smaller particles under the working action of the inner ring 4 and the outer ring 3, and are evenly distributed in the chamber between the inner ring 4 and the outer ring 3, so that the working parts of the inner ring 4, the retaining frame 5 and the outer ring 3 can be fully and evenly contact lubricated, thereby improving the lubrication quality and lubrication efficiency of the machine tool spindle bearing.

[0028] An oil collecting ring 11 made of a water-absorbing material is connected to the inner ring side wall of the outer ring 3, a magnetic block 12 is provided on the side wall of the inner ring 4, a slide groove is provided at the inner ring side wall of the outer ring 3 corresponding to the magnetic block 12, a pressure block 13 attracted to the magnetic block 12 is slidably connected inside the slide groove, an elastic member 14 is connected between the pressure block 13 and the inner end of the slide groove, and a pressure plate 15 is connected to the inner wall of the support seat 2 corresponding to one side of the slide groove; when a part of the mist-like lubricating oil falls to the bottom of the oil collecting ring 11 (which can be made of sponge) under its own gravity, the oil collecting ring 11 can The lubricating oil can be transported to the position corresponding to the pressure block 13 at the top. When the magnetic block 12 on the shaft body 1 rotates to a position close to the pressure block 13, the pressure block 13 slides toward the side of the pressure plate 15 under the attraction of the magnetic block 12, and squeezes the oil collecting ring 11 located between the two, so that the lubricating oil inside the oil collecting ring 11 is squeezed out and falls onto the rotating shaft again from both sides of the pressure plate 15, so that the lubricating oil can be thrown out and crushed again by the high-speed rotating shaft, thereby increasing the amount of mist oil droplets inside the bearing and enabling the lubricating oil to have a lasting and reciprocating lubrication effect on the bearing.

[0029] The side wall of the support seat 2 fits with the end face of the outer ring 3, and the end of the shaft body 1 extends to the outer end of the support seat 2 and is connected to a rotating rod 16, and the other end of the rotating rod 16 is provided with a fan blade 17; by arranging the side wall of the support seat 2 to fit with the end face of the outer ring 3, the chamber between the outer ring 3 and the inner ring 4 can be effectively sealed, reducing the outflow of mist-like oil droplets or contamination by external impurities. At the same time, when the shaft body 1 rotates, it can also drive the fan blade 17 to rotate synchronously through the rotating rod 16, so that the fan blade 17 can have a heat dissipation effect on the bearing, reducing the situation where the internal heat of the bearing is difficult to dissipate due to sealing.

[0030] A sleeve 18 for covering the fan blades 17 is connected to the side wall of the support seat 2, and heat dissipation grooves 19 are respectively opened on the two side walls of the support seat 2 close to and away from the fan blades 17. An elastic paddle 20 is connected to the side wall of the support seat 2 corresponding to the side of the heat dissipation groove 19 close to the fan blades 17; when the shaft body 1 drives the fan blades 17 to rotate inside the copper sleeve, an airflow flowing toward the side away from the support seat 2 is formed in the sleeve 18. At this time, the negative pressure chamber in the sleeve 18 can make the previously closed paddle 20 open, so that the external airflow enters from the heat dissipation groove 19 away from the sleeve 18, and after flowing through the inside of the support seat 2, it flows out from the heat dissipation groove 19 close to the sleeve 18, so that the heat inside the support seat 2 can be brought out more efficiently, and when the bearing is in a non-working state, the elastic paddle 20 will automatically reset and close, so as to block the heat dissipation groove 19 and reduce the external dust and impurities from flowing into the inside of the support seat 2 and polluting the bearing.

[0031] The inner wall of the sleeve 18 is symmetrically connected with support rods 21, and the ends of the two support rods 21 close to each other are fixedly connected with a rotating sleeve 22. A rotating ring 23 is rotatably connected inside the rotating sleeve 22. A gravity block 24 is embedded in the inner bottom end of the rotating ring 23. The fan blade 17 is fixedly connected to the end of the rotating ring 23. The free end of the rotating rod 16 is located inside the rotating ring 23. A sliding cavity is symmetrically opened on the inner ring side wall of the rotating ring 23. A clamping plate 25 made of magnetic material is slidably connected inside the sliding cavity. A spring is connected between the clamping plate 25 and the inner end of the sliding cavity. An electromagnet 26 that can repel the clamping plate 25 is installed on the support rod 21; when the bearing is in a relatively low speed operation and no heat dissipation treatment is required, the clamping plate 25 is retracted inside the sliding cavity and there is a gap between the clamping plate 25 and the rotating rod 16, so that the rotating rod 16 and the rotating ring 23 are separated. When the shaft body 1 rotates, it no longer drives the blades 17 to rotate, thereby reducing the situation where the blades 17 generate a large resistance to the shaft body 1 when rotating. When the bearing is in long-term high-speed operation and needs heat dissipation treatment, the electromagnet 26 works and repels the two clamping plates 25, so that the two clamping plates 25 slide to one side of the rotating rod 16 respectively and clamp the rotating rod 16. At this time, when the shaft body 1 rotates, it can drive the rotating ring 23 to rotate in the rotating sleeve 22 through the clamping plates 25, so that the heat dissipation work of the blades 17 can be carried out smoothly, and by arranging a gravity block 24 inside the rotating ring 23, the rotating ring 23 can adjust its own position under the action of the gravity block 24 in a stationary state until the two clamping plates 25 on the rotating ring 23 and the electromagnet 26 are on the same vertical plane, so that the electromagnet 26 can drive the clamping plates 25 to work stably.

[0032] The setting position of the heat dissipation groove 19 corresponds to the position of the electromagnet 26. The end of the paddle 20 is connected to an adsorption block 27, and the electromagnet 26 can attract the adsorption sheet when working; when the electromagnet 26 is working, the electromagnet 26 can simultaneously attract the adsorption sheet at the end of the paddle 20, so that the paddle 20 can be opened more effectively, thereby facilitating the flow of gas inside the support base 2, and further improving the heat dissipation effect of the support base 2.

[0033] Embodiment 2:

[0034] like Figure 4 As shown, compared with Example 1, another implementation of the present invention is: the heat dissipation groove 19 is arranged at the bottom end of the side wall of the support seat 2, and the end of the paddle 20 away from the fan blades 17 and located at the bottom end of the support seat 2 is connected with a filter layer 28, and the other end of the filter layer 28 is connected to the inner wall of the support seat 2; when the support seat 2 dissipates heat and the paddle 20 away from the fan blades 17 is opened, the filter layer 28 located at the end of the paddle 20 can filter impurities in the inflowing gas, thereby further reducing the contamination of the bearing by external impurities when dissipating heat.

[0035] The free end of the paddle 20 connected to the filter layer 28 faces downward, the filter layer 28 is made of sponge material, and a wavy elastic strip 29 is connected to the inside of the filter layer 28, and a plurality of air holes are opened on the side wall of the elastic strip 29. The outer ring 3 and the support seat 2 corresponding to the bottom end of the filter layer 28 are respectively provided with an oil outlet groove 30, and a solenoid valve 31 is installed inside the oil outlet groove 30; when the bearing is dissipating heat, the paddle 20 can drive the elastic strip 29 and the filter layer 28 to open at the same time, and the bottom end of the filter layer 28 can absorb the oil from the oil outlet groove 30. 0, when the bearing heat dissipation ends, the paddle 20 can drive the elastic strip 29 to contract when it is reset, and use the contracted elastic strip 29 to squeeze out the lubricating oil absorbed inside, and the lubricating oil can bring out the dust and impurities intercepted by the filter layer 28 when it is squeezed out, so as to achieve a "self-cleaning" effect on the filter layer 28, thereby improving the continuous working ability of the filter layer 28, and at the same time, the waste oil and impurities in the oil outlet groove 30 can be discharged together by controlling the opening of the solenoid valve 31, so as to conveniently maintain the bearing.

[0036] Working principle: When the bearing body of the present invention needs lubrication, the shaft body 1 is controlled to rotate at a high speed, and the control valve 10 is opened at the same time, so that the lubricating oil in the oil storage tank 7 can flow from the oil guide pipe 9 and the oil inlet groove 8 into the space between the inner ring 4 and the outer ring 3. When the lubricating oil drips onto the side wall of the inner ring 4 rotating at a high speed, the inner ring 4 can quickly throw out the oil droplets in a centrifugal manner, and the thrown oil droplets will collide with the inner wall of the outer ring 3, so that the oil droplets are dispersed into oil mist with smaller particles under the working action of the inner ring 4 and the outer ring 3, and are evenly distributed in the chamber between the inner ring 4 and the outer ring 3, so that the inner ring 4, the retaining frame 5 and the outer ring 3 can be lubricated. The working parts are fully and evenly contact lubricated, thereby improving the lubrication quality and efficiency of the machine tool spindle bearings; when a part of the mist-like lubricating oil falls to the bottom of the oil collecting ring 11 (which can be made of sponge) under its own gravity, the oil collecting ring 11 can transport the lubricating oil to the top corresponding to the position of the pressing block 13. When the magnetic block 12 on the shaft body 1 rotates to a position close to the pressing block 13, the pressing block 13 slides toward the side of the pressing plate 15 under the attraction of the magnetic block 12, and squeezes the oil collecting ring 11 located therebetween, so that the lubricating oil inside the oil collecting ring 11 is squeezed out and falls onto the rotating shaft again from both sides of the pressing plate 15. Therefore, the lubricating oil can be thrown out and crushed again by the high-speed rotating shaft, thereby increasing the amount of mist oil droplets inside the bearing and enabling the lubricating oil to have a lasting and reciprocating lubrication effect on the bearing; by arranging the side wall of the support seat 2 to fit the end face of the outer ring 3, the chamber between the outer ring 3 and the inner ring 4 can be effectively sealed, reducing the outflow of mist oil droplets or the contamination by external impurities. At the same time, when the shaft body 1 rotates, it can also drive the fan blades 17 to rotate synchronously through the rotating rod 16, so that the fan blades 17 can have a heat dissipation effect on the bearing, reducing the situation where the internal heat of the bearing is difficult to dissipate due to sealing; when the shaft body 1 drives the fan When the blade 17 rotates inside the copper sleeve, an airflow will be formed in the sleeve 18 to flow toward the side away from the support seat 2. At this time, the negative pressure chamber in the sleeve 18 can open the previously closed paddle 20, so that the external airflow enters from the heat dissipation slot 19 away from the sleeve 18, and after flowing through the inside of the support seat 2, it flows out from the heat dissipation slot 19 close to the sleeve 18, so that the heat inside the support seat 2 can be taken out more efficiently, and when the bearing is in a non-working state, the elastic paddle 20 will automatically reset and close, so that the heat dissipation slot 19 can be blocked, reducing the external dust and impurities from flowing into the inside of the support seat 2 and polluting the bearing;When the bearing is in low speed operation and does not need heat dissipation treatment, the clamping plate 25 is retracted in the sliding cavity and there is a gap between the rotating rod 16, so that the rotating rod 16 and the rotating ring 23 are separated, so that the shaft body 1 no longer drives the blades 17 to rotate when rotating, and reduces the situation where the blades 17 produce a large resistance to the shaft body 1 when rotating. When the bearing is in high speed operation for a long time and needs heat dissipation treatment, the electromagnet 26 works and repels the two clamping plates 25, so that the two clamping plates 25 slide to one side of the rotating rod 16 respectively, and the rotating rod 16 The shaft body 1 is clamped, and when the shaft body 1 rotates, the clamping plate 25 can drive the rotating ring 23 to rotate in the rotating sleeve 22, so that the heat dissipation work of the fan blade 17 can be carried out smoothly, and by arranging a gravity block 24 inside the rotating ring 23, the rotating ring 23 can adjust its position under the action of the gravity block 24 in a stationary state until the two clamping plates 25 on the rotating ring 23 and the electromagnet 26 are on the same vertical plane, so that the electromagnet 26 can drive the clamping plate 25 to work stably; when the electromagnet 26 is working, the electromagnet 26 can be synchronously The adsorption sheet at the end of the paddle 20 is attracted, so that the paddle 20 can be opened more effectively, thereby facilitating the flow of gas inside the support seat 2, and further improving the heat dissipation effect of the support seat 2; when the support seat 2 is dissipating heat and the paddle 20 away from the fan blade 17 is opened, the filter layer 28 located at the end of the paddle 20 can filter impurities in the inflowing gas, thereby further reducing the situation where the bearing is contaminated by external impurities when dissipating heat; when the bearing is dissipating heat, the paddle 20 can drive the elastic strip 29 and the filter layer 28 to open at the same time, and at the same time, the bottom of the filter layer 28 The end of the filter 28 can absorb the lubricating oil at the oil outlet groove 30. When the bearing heat dissipation is finished, the paddle 20 can drive the elastic strip 29 to contract when it is reset, and use the contracted elastic strip 29 to squeeze out the lubricating oil absorbed inside. When the lubricating oil is squeezed out, the dust and impurities intercepted by the filter layer 28 can be taken out, so that the filter layer 28 can have a "self-cleaning" effect, improving the continuous working ability of the filter layer 28. At the same time, the waste oil and impurities in the oil outlet groove 30 can be discharged together by controlling the opening of the solenoid valve 31, so that the bearing can be conveniently maintained. ;

[0037] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A machine tool spindle bearing structure, comprising a shaft body (1); characterized in that: A support seat (2) is provided at the end of the shaft body (1), a bearing body is connected inside the support seat (2), the bearing body comprises an outer ring (3) connected to the support seat (2), an inner ring (4) is rotatably connected inside the outer ring (3), a retaining frame (5) is provided between the outer ring (3) and the inner ring (4), a group of rolling balls (6) respectively matched with the inner ring (4) and the outer ring (3) are provided on the side wall of the retaining frame (5), an oil storage tank (7) is installed at the top end of the support seat (2), and the support seat (2) and the side wall of the outer ring (3) corresponding to one side of the oil storage tank (7) are respectively provided with oil inlet grooves (8) which are connected to each other, and the top end of the oil inlet groove (8) is connected to the inside of the oil storage tank (7). An oil guide pipe (9) is provided, a control valve (10) is installed on the oil guide pipe (9), an oil collecting ring (11) made of a water-absorbing material is connected to the inner ring side wall of the outer ring (3), a magnetic block (12) is provided on the side wall of the inner ring (4), a slide groove is provided at the inner ring side wall of the outer ring (3) corresponding to the magnetic block (12), a pressure block (13) attracted to the magnetic block (12) is slidably connected inside the slide groove, an elastic member (14) is connected between the pressure block (13) and the inner end of the slide groove, a pressure plate (15) is connected to the inner wall of the support seat (2) corresponding to one side of the slide groove, the side wall of the support seat (2) is fitted with the end face of the outer ring (3), and the end of the shaft body (1) extends out to the support seat (2) The outer end is connected to a rotating rod (16), and the other end of the rotating rod (16) is provided with a fan blade (17). The side wall of the support seat (2) is connected to a sleeve (18) for covering the fan blade (17). The side walls of the support seat (2) close to and away from the fan blade (17) are respectively provided with heat dissipation grooves (19). The side wall of the support seat (2) corresponding to the side of the heat dissipation groove (19) close to the fan blade (17) is connected to an elastic paddle (20). The inner wall of the sleeve (18) is symmetrically connected to support rods (21), and the ends of the two support rods (21) close to each other are commonly fixedly connected to a rotating sleeve (22), and a rotating ring (23) is rotatably connected inside the rotating sleeve (22), and the inner bottom of the rotating ring (23) is A gravity block (24) is embedded and installed at the end, the fan blade (17) is fixedly connected to the end of the rotating ring (23), the free end of the rotating rod (16) is located inside the rotating ring (23), and a sliding cavity is symmetrically opened on the inner ring side wall of the rotating ring (23). A clamping plate (25) made of magnetic material is slidably connected inside the sliding cavity, and a spring is connected between the clamping plate (25) and the inner end of the sliding cavity. An electromagnet (26) capable of repelling the clamping plate (25) is installed on the support rod (21), and the setting position of the heat dissipation groove (19) corresponds to the position of the electromagnet (26). The end of the paddle (20) is connected to an adsorption block (27), and the electromagnet (26) can attract the adsorption plate when working.

2. The machine tool spindle bearing structure according to claim 1, characterized in that: The heat dissipation groove (19) is arranged at the bottom end of the side wall of the support seat (2), and the end of the paddle (20) which is away from the fan blade (17) and located at the bottom end of the support seat (2) is connected to a filter layer (28), and the other end of the filter layer (28) is connected to the inner wall of the support seat (2).

3. The machine tool spindle bearing structure according to claim 2, characterized in that: The free end of the paddle (20) connected to the filter layer (28) faces downwards, the filter layer (28) is made of sponge material, and a wavy elastic strip (29) is connected inside the filter layer (28), a plurality of air holes are provided on the side wall of the elastic strip (29), and an oil outlet groove (30) is respectively provided on the outer ring (3) corresponding to the bottom end of the filter layer (28) and the support seat (2), and a solenoid valve (31) is installed inside the oil outlet groove (30).

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