Precise heavy-load angular contact ball bearing

Abstract

The utility model relates to the technical field of angular contact ball bearings, in particular to a precise heavy-load angular contact ball bearing, which is convenient for filling lubricating oil, reduces the abrasion of balls of the angular contact ball bearing during heavy load, improves the precision of the angular contact ball bearing and prolongs the service life of the balls. Comprising an outer ring, two inner rings, a plurality of bolts and a plurality of balls, the bearing further comprises a mounting sleeve, an upper cover, a plunger and a spring I. The middle of the outer ring is provided with a communicated mounting hole formed in the radial direction, the bottom of the mounting hole is provided with an oil filling hole formed in the axial direction, the two ends of the oil filling hole are communicated with the two ball grooves of the outer ring respectively, the mounting sleeve is mounted in the mounting hole of the outer ring, and the upper cover is mounted at the upper end of the mounting sleeve. An oil inlet hole is formed in the middle of the upper cover, the plunger is elastically installed in the installation sleeve in a lifting mode through the first spring, a gap is formed between the outer wall of the plunger and the inner wall of the installation sleeve, and the upper cover and the plunger are provided with opposite sealing contact faces.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of angular contact ball bearing, in particular to a precision heavy load angular contact ball bearing. BACKGROUND

[0002] Angular contact ball bearing is a bearing structure that can bear radial load and axial load at the same time, the greater the contact angle, the higher the axial load capacity, the contact angle here refers to the contact between the ball and the inner side of its raceway in the radial plane.

[0003] The prior art discloses a double-row angular contact ball bearing, which is provided with a detachable stamping retainer for mounting the ball, the inner raceway and the pressing strip are used to mount the ball between the inner ring and the outer ring to form a double-row angular contact ball bearing, so that the bearing can maintain complete function during use, and the internal dust can be cleaned by disassembling the structure, and the internal damaged ball can be replaced to reduce the friction damage of the ball to the stamping retainer, ensure the smooth use of the double-row angular contact ball bearing, and prolong the service life of the double-row angular contact ball bearing by replacing the worn ball, and reduce the loss of the part.

[0004] However, the above-mentioned angular contact ball bearing does not have a structure for adding lubricating oil, so that after the bearing generates heat under heavy load and the lubricating oil is consumed, it is not convenient to add and supplement the lubricating oil to the ball and the groove of the ball, which causes the ball of the angular contact ball bearing to wear, reduces the precision of the angular contact ball bearing and the service life of the ball. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a precision heavy load angular contact ball bearing which is convenient to add lubricating oil, reduces the wear of the ball of the angular contact ball bearing under heavy load, and improves the precision of the angular contact ball bearing and the service life of the ball.

[0006] The utility model discloses a kind of precision heavy-duty angular contact ball bearings, including outer ring, two inner rings, multiple bolts and multiple balls, the inner wall of outer ring is set ball groove to the front and rear two parts, two inner rings are oppositely arranged in the inside of outer ring, two inner rings are connected by multiple bolts, the outer wall of two inner rings is respectively set with the accommodating structure opposite to the two ball grooves of outer ring, multiple balls are arranged in the accommodating structure of two inner rings and the two ball grooves of outer ring and roll;It also includes mounting sleeve, upper cover, plug post and spring one, the middle part of outer ring is set with the mounting hole of radially arranged intercommunication, the bottom of mounting hole is set with the oil hole of axially arranged, the both ends of oil hole are respectively communicated with the two ball grooves of outer ring, mounting sleeve is installed in the mounting hole of outer ring, upper cover is installed in the upper end of mounting sleeve, the middle part of upper cover is set with oil inlet, plug post is elastically installed in the inside of mounting sleeve by spring one and can be lifted, the outer wall of plug post and the wall of inside of mounting sleeve are set with gap, upper cover and plug post are set with opposite sealing contact surface;Two inner rings are installed into integral structure by multiple bolts, rotating shaft is installed in two inner rings, when rotating shaft rotates, two inner rings drive multiple balls to roll along the two ball grooves of outer ring by accommodating structure, so as to rotate support to rotating shaft, when needing to inject lubricating oil into ball groove, the nozzle of oil gun is inserted into the oil inlet of upper cover, so that nozzle pushes plug post to the lower side of upper cover, so that the sealing contact surface between upper cover and plug post is separated, spring one is compressed, lubricating oil is output by using oil gun, so that lubricating oil is inserted into mounting sleeve through the gap between plug post and mounting sleeve, and is injected into the two ball grooves of outer ring by mounting sleeve and oil hole, after oiling, the nozzle of oil gun is taken out from the oil inlet of upper cover, the elastic force of spring one pushes plug post to upper cover, so that the sealing contact surface of plug post and upper cover is pressed tightly, avoid lubricating oil leakage, good practicability, reduce the ball wear of angular contact ball bearing when heavy load, improve the precision and service life of ball of angular contact ball bearing.

[0007] Preferably, the oil delivery pipe, the partition plate, the guide pipe seat, the piston pipe column and the spring two are further included, the oil delivery pipe is installed at the bottom of the plug column, the bottom of the oil delivery pipe is closed, vertical holes are arranged in the middle of the side wall of the oil delivery pipe, the partition plate is horizontally installed in the middle of the installation sleeve pipe, a sliding hole is arranged in the middle of the partition plate, the oil delivery pipe is slidingly inserted into the sliding hole of the partition plate, the outer wall of the oil delivery pipe is in sliding contact with the sliding hole of the partition plate, the lower end of the spring one is installed on the partition plate, the guide pipe seat is installed at the bottom of the installation sleeve pipe, the piston pipe column is slidingly installed at the lower part of the installation sleeve pipe, the upper end of the piston pipe column is provided with a piston, the piston is in sliding sealing contact with the inner wall of the installation sleeve pipe, the lower part of the piston pipe column is a vertical pipe, the vertical pipe is provided with an extrusion hole, the vertical pipe of the piston pipe column is slidingly inserted into the guide pipe seat, the lower end of the spring two is connected with the guide pipe seat, the upper end of the spring two is connected with the piston pipe column, and the spring two pushes the piston pipe column upward by the elastic force; when oiling, the nozzle of the oil gun pushes the plug column and the oil delivery pipe downward, so that the oil delivery pipe is inserted into the lower part of the partition plate, the lubricating oil enters the upper part of the installation sleeve pipe through the gap between the plug column and the installation sleeve pipe, and then is extruded into the space between the partition plate and the piston of the piston pipe column through the vertical hole of the oil delivery pipe, so that the lubricating oil fills the space between the partition plate and the piston of the piston pipe column, the piston pipe column is lowered to compress the spring two, and the lubricating oil between the partition plate and the piston pipe column is transported through the extrusion hole of the piston pipe column and the axial oiling hole of the outer ring; after the oil gun is taken out, the plug column and the oil delivery pipe are reset by the spring one, so that the lower end of the oil delivery pipe closes the sliding hole of the partition plate; when the lubricating oil in the ball groove of the outer ring is consumed, the piston pipe column is pushed upward by the elastic force of the spring two, so that the piston of the piston pipe column extrudes the lubricating oil to automatically supplement the lubricating oil into the ball groove of the outer ring, thereby improving the stability and reliability of the bearing.

[0008] Preferably, the limiting ring seat and the two limiting grooves are further included, the inner wall of the outer ring is provided with an inwardly protruding limiting ring seat in the middle, the outer wall of the opposite end of the two inner rings is provided with a limiting groove matched with the side wall of the limiting ring seat, and the two sides of the limiting ring seat axially limit the two limiting grooves; by arranging the limiting ring seat and the limiting groove, the inner contact angle of the plurality of balls and the ball groove of the outer ring is assisted, so that the two inner rings and the outer ring are further limited in the axial direction, and the axial stability and precision of the bearing as a whole are improved.

[0009] Preferably, the plurality of blades are further included, the plurality of blades are circumferentially and uniformly installed on the outer wall of the inner end of the inner ring, and the plurality of blades surround the outer side of the limiting ring seat; after the two inner rings are relatively installed through the plurality of bolts, an oil groove is formed between the two limiting grooves, the plurality of blades are located in the oil groove, the oil groove is communicated with the two ball grooves of the outer ring, and when the two inner rings rotate with the rotating shaft, the plurality of blades are driven to rotate, so that the plurality of blades stir the lubricating oil between the outer ring and the inner ring, the lubricating oil flows between the outer ring and the inner ring, the plurality of balls are uniformly lubricated, and the overall reliability of the bearing is improved.

[0010] Preferably, the surface oil groove, the plurality of circulating oil holes and the sealing plate are further included, the plurality of blades are arranged in an inclined manner, the surface oil groove is arranged on the middle outer wall of the outer ring, the outer ends of the plurality of circulating oil holes pass through the surface oil groove, the inner ends of the plurality of circulating oil holes are provided with openings on the inner wall of the limiting ring seat, and the sealing plate is sealingly installed on the outer end of the surface oil groove; when the plurality of blades rotate, the lubricating oil between the two limiting grooves is pushed to one side, so that the lubricating oil between the outer ring and the inner ring is transported to the surface oil groove through the plurality of circulating oil holes located behind the lubricating oil transport, the lubricating oil in the surface oil groove is cooled outward, the lubricating oil in the surface oil groove is transported to the two limiting grooves through the plurality of circulating oil holes located in front of the lubricating oil transport, the internal and external circulation of the lubricating oil is realized, the overall heat dissipation efficiency of the bearing is improved, and the stability and reliability of the bearing are improved.

[0011] Preferably, the containing structure of the two inner rings is a plurality of spherical grooves, the outer wall of the outer end of the two inner rings is provided with an outwardly protruding annular limiting seat, a plurality of spherical grooves are uniformly arranged on the circumferences of the two annular limiting seats, and the plurality of spherical grooves are used for rolling and containing a plurality of rolling balls; the plurality of spherical grooves respectively rolling contain a plurality of rolling balls, and the plurality of rolling balls are separated and limited, so that the traditional rolling ball frame is cancelled, and the heavy load effect is improved.

[0012] Preferably, the two sealing rings and the two dust covers are further included, the sealing rings are respectively and concentrically arranged on the outer end faces of the two inner rings, the dust covers are respectively installed on the two ends of the outer ring, and the inner walls of the dust covers are respectively provided with sealing surfaces matched with the sealing rings and wear-resistant sealing rings; after the dust covers are installed on the two ends of the outer ring, the sealing surfaces of the two dust covers are respectively in sliding sealing contact with the two sealing rings, and the sealing effect is improved through the wear-resistant sealing rings, so that the leakage of the lubricating oil between the outer ring and the inner ring is reduced.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the two inner rings are installed into an integral structure through a plurality of bolts, the rotating shaft is installed in the two inner rings, when the rotating shaft rotates, the two inner rings drive the plurality of rolling balls to roll along the two rolling ball grooves of the outer ring through the containing structure, so as to support the rotating shaft in rotation, when it is needed to add lubricating oil into the rolling ball grooves, the nozzle of the oil gun is inserted into the oil inlet hole of the upper cover, so that the nozzle pushes the plug column upwardly below the upper cover, so that the sealing contact surface between the upper cover and the plug column is separated, the spring is compressed, the oil gun outputs the lubricating oil, so that the lubricating oil enters into the installation sleeve through the gap between the plug column and the installation sleeve, and enters into the two rolling ball grooves of the outer ring through the installation sleeve and the oil inlet hole, after the oiling is completed, the nozzle of the oil gun is taken out of the oil inlet hole of the upper cover, the spring pushes the plug column upwardly to the upper cover, so that the sealing contact surface of the plug column and the upper cover is tightly sealed, the leakage of the lubricating oil is avoided, the practicability is good, the wear of the rolling balls of the angular contact ball bearing is reduced during heavy load, and the precision and service life of the angular contact ball bearing are improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural schematic diagram of the present utility model;

[0015] Figure 2 is a front sectional structural schematic diagram of the present utility model;

[0016] Figure 3 is a axonometric structural schematic diagram of the present utility model;

[0017] Figure 4 is a structural schematic diagram of the present utility model in the exploded state;

[0018] Figure 5 is a structural schematic diagram of the present utility model in the bolted combination state of the inner ring;

[0019] Figure 6 is a front sectional structural schematic diagram of the outer ring;

[0020] Figure 7 is a partial sectional structural schematic diagram of the structures of the mounting sleeve, upper cover, plug column, partition, guide pipe base, piston pipe column and spring two;

[0021] Figure 8 is a structural schematic diagram of the structures of the mounting sleeve, upper cover, plug column, partition, guide pipe base, piston pipe column and spring two in the exploded state.

[0022] Markings in the drawings: 1, outer ring; 2, inner ring; 3, bolt; 4, ball; 5, mounting sleeve; 6, upper cover; 7, plug column; 8, spring one; 9, oil delivery pipe; 10, partition; 11, guide pipe base; 12, piston pipe column; 13, spring two; 14, limiting ring seat; 15, limiting groove; 16, vane; 17, surface oil groove; 18, circulating oil hole; 19, sealing plate; 20, spherical groove; 21, sealing ring; 22, dust cover. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present utility model, the present utility model will be described more fully below with reference to the related drawings. The present utility model can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0024] Example 1

[0025] As Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, a kind of precision heavy-duty angular contact ball bearing, including outer ring 1, two inner rings 2, multiple bolts 3 and multiple balls 4, the inner wall of outer ring 1 is arranged with ball groove in front and back, two inner rings 2 are arranged in the inside of outer ring 1, two inner rings 2 are connected by multiple bolts 3, the outer wall of two inner rings 2 is respectively arranged with accommodating structure opposite to the two ball grooves of outer ring 1, multiple balls 4 are arranged in the two ball grooves of outer ring 1 and the accommodating structure of two inner rings 2 and roll;It also includes mounting sleeve 5, upper cover 6, plug column 7 and spring one 8, the middle part of outer ring 1 is provided with the radially arranged installation hole in communication, the bottom of installation hole is provided with the axially arranged oil hole, the two ends of oil hole are respectively communicated with the two ball grooves of outer ring 1, mounting sleeve 5 is installed in the installation hole of outer ring 1, upper cover 6 is installed in the upper end of mounting sleeve 5, the middle part of upper cover 6 is provided with oil inlet hole, plug column 7 is elastically installed in the inside of mounting sleeve 5 by spring one 8, the outer wall of plug column 7 and the wall of the inside of mounting sleeve 5 are provided with gap, upper cover 6 and plug column 7 are provided with opposite sealing contact surface;It also includes oil pipe 9, baffle 10, guide pipe base 11, piston pipe column 12 and spring two 13, oil pipe 9 is installed in the bottom of plug column 7, the bottom of oil pipe 9 is closed, the lateral wall of oil pipe 9 is provided with vertical hole in the middle part, baffle 10 is horizontally installed in the middle part of mounting sleeve 5, the middle part of baffle 10 is provided with sliding hole, oil pipe 9 is slidingly inserted in the sliding hole of baffle 10, the outer wall of oil pipe 9 and the sliding hole of baffle 10 slidingly contact, the lower end of spring one 8 is installed on baffle 10, guide pipe base 11 is installed in the bottom of mounting sleeve 5, piston pipe column 12 is slidingly installed in the lower part of mounting sleeve 5, the upper end of piston pipe column 12 is provided with piston, piston and the inner wall of mounting sleeve 5 slidingly seal contact, the lower part of piston pipe column 12 is vertical pipe, vertical pipe is provided with extrusion small hole, vertical pipe of piston pipe column 12 is slidingly inserted in guide pipe base 11, the lower end of spring two 13 is connected with guide pipe base 11, the upper end of spring two 13 is connected with piston pipe column 12, the elastic force of spring two 13 pushes piston pipe column 12 upwards.

[0026] Two inner rings 2 are installed as a whole structure by a plurality of bolts 3, a rotating shaft is installed in the two inner rings 2, when the rotating shaft rotates, the two inner rings 2 drive a plurality of balls 4 to roll along two ball grooves of the outer ring 1 through a containing structure, thereby supporting the rotating shaft to rotate, when it is necessary to add lubricating oil to the ball grooves, a nozzle of an oil gun is inserted into an oil inlet hole of the upper cover 6, so that the nozzle pushes the plug column 7 and the oil feeding pipe 9 downward, so that the oil feeding pipe 9 is inserted into the lower part of the partition plate 10, the lubricating oil enters the upper part of the mounting sleeve 5 through the gap between the plug column 7 and the mounting sleeve 5, and then is squeezed into the space between the partition plate 10 and the piston of the piston pipe column 12 through the vertical hole of the oil feeding pipe 9, so that the lubricating oil fills the space between the partition plate 10 and the piston of the piston pipe column 12, the piston pipe column 12 is lowered to compress the spring 13, and the lubricating oil between the partition plate 10 and the piston pipe column 12 is injected into the two ball grooves of the outer ring 1 through the extrusion hole of the piston pipe column 12 and the axial oil inlet hole of the outer ring 1, after the oiling is completed, the nozzle of the oil gun is taken out of the oil inlet hole of the upper cover 6, the elastic force of the spring 8 pushes the plug column 7 upward to the upper cover 6, so that the plug column 7 and the sealing surface of the upper cover 6 are tightly sealed to avoid leakage of the lubricating oil, so that the lower end of the oil feeding pipe 9 closes the sliding hole of the partition plate 10, when the lubricating oil in the ball grooves of the outer ring 1 is consumed, the elastic force of the spring 13 pushes the piston pipe column 12 upward, so that the piston of the piston pipe column 12 extrudes the lubricating oil to automatically supplement the lubricating oil to the ball grooves of the outer ring 1, thereby improving the stability and reliability of the bearing.

[0027] Embodiment 2

[0028] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 on the basis of embodiment 1, further comprising a limiting ring seat 14 and two limiting grooves 15, the inner wall of the outer ring 1 is provided with the limiting ring seat 14 protruding inward in the middle, the outer wall of the opposite end of the two inner rings 2 is provided with the limiting groove 15 matched with the side wall of the limiting ring seat 14, the two side walls of the limiting ring seat 14 axially limit the two limiting grooves 15; further comprising a plurality of blades 16, the inner end outer wall of the inner ring 2 is circumferentially and uniformly provided with a plurality of blades 16, the plurality of blades 16 surrounds the outside of the limiting ring seat 14; further comprising a surface oil groove 17, a plurality of circulating oil holes 18 and a sealing plate 19, the plurality of blades 16 are obliquely arranged, the middle outer wall of the outer ring 1 is provided with the surface oil groove 17, the outer end of the plurality of circulating oil holes 18 passes through the surface oil groove 17, the inner end of the plurality of circulating oil holes 18 is provided with an opening on the inner wall of the limiting ring seat 14, and the sealing plate 19 is sealingly installed on the outer end port of the surface oil groove 17.

[0029] By setting a limiting ring seat 14 and a limiting groove 15, the inner contact angle of the multiple balls 4 and the ball grooves of the outer ring 1 is assisted, so that the two inner rings 2 and the outer ring 1 are further limited in the axial direction, improving the overall axial stability and precision of the bearing. After the two inner rings 2 are installed relative to each other by multiple bolts 3, an oil groove is formed between the two limiting grooves 15. Multiple blades 16 are located in the oil groove, which is connected to the two ball grooves of the outer ring 1. When the two inner rings 2 rotate with the rotating shaft, they drive the multiple blades 16 to rotate, so that the multiple blades 16 agitate the lubricating oil between the outer ring 1 and the inner ring 2, so that the lubricating oil is in the outer ring 1. The flow between the inner ring 2 and the outer ring 2 ensures uniform lubrication of the multiple balls 4, improving the overall reliability of the bearing. At the same time, when the multiple blades 16 rotate, they push the lubricating oil between the two limiting grooves 15 to one side, so that the lubricating oil between the outer ring 1 and the inner ring 2 is delivered to the surface oil groove 17 through multiple circulating oil holes 18 located behind the lubricating oil delivery. The lubricating oil dissipates heat outward in the surface oil groove 17, and the lubricating oil in the surface oil groove 17 is delivered to the space between the two limiting grooves 15 through multiple circulating oil holes 18 located in front of the lubricating oil delivery, realizing the internal and external circulation of the lubricating oil, improving the overall heat dissipation efficiency of the bearing, and improving the stability and reliability of the bearing.

[0030] Example 3

[0031] like Figures 1 to 5 As shown, based on Embodiment 1, the receiving structure of the two inner rings 2 is a plurality of spherical grooves 20. An outwardly protruding annular limiting seat is provided on the outer wall of the outer end of the two inner rings 2. A plurality of spherical grooves 20 are evenly arranged on the circumference of the two annular limiting seats. The plurality of spherical grooves 20 are used to roll and accommodate a plurality of balls 4. It also includes two sealing rings 21 and two dust covers 22. The sealing rings 21 are concentrically arranged on the outer end face of the two inner rings 2 respectively. The two dust covers 22 are respectively installed on the two ends of the outer ring 1. The inner wall of the two dust covers 22 is provided with a sealing surface that matches the sealing rings 21 and a wear-resistant sealing ring.

[0032] Multiple spherical grooves 20 respectively accommodate multiple balls 4 and separate and limit the multiple balls 4, eliminating the traditional ball cage and improving the heavy load effect. After the two dust covers 22 are installed on both ends of the outer ring 1, the sealing surfaces of the two dust covers 22 respectively slide and seal with the two sealing rings 21, and the sealing effect is improved by the wear-resistant sealing ring, reducing the leakage of lubricating oil between the outer ring 1 and the inner ring 2.

[0033] like Figures 1 to 8As shown, the precise heavy load angular contact ball bearing of the utility model, when working, first two inner rings 2 are installed into integral structure through a plurality of bolts 3, the rotating shaft is installed in two inner rings 2, when the rotating shaft rotates, two inner rings 2 drive a plurality of balls 4 along the two ball grooves of outer ring 1 to roll through containing structure, thereby rotating support is carried out to the rotating shaft, then when needing to inject lubricating oil into the ball groove, the nozzle of oil gun is inserted into the oil inlet hole of upper cover 6, the nozzle of oil gun pushes down plug column 7 and oil delivery pipe 9, so that oil delivery pipe 9 is inserted into the lower part of partition plate 10, so that the sealing contact surface between upper cover 6 and plug column 7 is separated, spring one 8 is compressed, then the output lubricating oil of oil gun is used, so that the lubricating oil extends into the upper part of mounting sleeve pipe 5 through the gap between plug column 7 and mounting sleeve pipe 5, and then is extruded between partition plate 10 and piston of piston pipe column 12 through the vertical hole of oil delivery pipe 9, so that the lubricating oil fills the space between partition plate 10 and piston of piston pipe column 12, piston pipe column 12 is compressed by spring two 13, and the lubricating oil between partition plate 10 and piston pipe column 12 is transported through the extrusion small hole of piston pipe column 12 and the axial oil inlet hole of outer ring 1, finally, when oil injection is completed, the nozzle of oil gun is taken out from the oil inlet hole of upper cover 6, the spring force of spring one 8 pushes plug column 7 to upper cover 6, so that the sealing contact surface of plug column 7 and upper cover 6 is compressed and sealed, lubricating oil leakage is avoided, oil delivery pipe 9 is reset, so that the lower end of oil delivery pipe 9 closes the sliding hole of partition plate 10, when the lubricating oil in the ball groove of outer ring 1 is consumed, the spring force of spring two 13 pushes piston pipe column 12 upwards, so that the piston of piston pipe column 12 extrudes lubricating oil and thereby automatically supplements the lubricating oil in the ball groove of outer ring 1, and the lubricating effect of the bearing can be kept for a long time.

[0034] The utility model realizes the main function:

[0035] 1, it is convenient to inject lubricating oil, reduces the ball wear of angular contact ball bearing when heavy load, improves the precision and service life of ball of angular contact ball bearing;

[0036] 2, it has automatic oil supplement function, and the lubricating effect of bearing can be kept for a long time;

[0037] 3, through the internal and external circulation of lubricating oil, the heat dissipation effect of bearing is improved.

[0038] The installation mode, connection mode or setting mode of the precise heavy load angular contact ball bearing of the utility model are all common mechanical modes, as long as the beneficial effects can be achieved, implementation can be carried out;The outer ring 1, inner ring 2, bolt 3, ball 4, spring one 8, piston pipe column 12, spring two 13, guide pipe base 11, blade 16, sealing ring 21, dust cover 22 of the precise heavy load angular contact ball bearing of the utility model are purchased on the market, and the technical personnel in the industry only need to install and operate according to the attached instruction manual, without the creative labor of the technical personnel in the field.

[0039] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless specifically defined otherwise. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] The preferred embodiments of the present application have been described above with the aid of drawing only. It will be apparent, however, to those skilled in the art that modifications and improvements can be made without departing from the scope and spirit of the application.

Claims

1. A precision heavy-duty angular contact ball bearing, comprising an outer ring (1), two inner rings (2), a plurality of bolts (3) and a plurality of balls (4), the inner wall of the outer ring (1) is provided with ball grooves on the front and back parts, the two inner rings (2) are arranged oppositely inside the outer ring (1), the two inner rings (2) are connected by the plurality of bolts (3), the outer wall of the two inner rings (2) is respectively provided with accommodating structures opposite to the two ball grooves of the outer ring (1), and the plurality of balls (4) are arranged rolling in the two ball grooves of the outer ring (1) and the accommodating structures of the two inner rings (2); characterized in that, It also includes installation sleeve (5), upper cover (6), plug column (7) and spring (8), the middle part of outer ring (1) is provided with a communication radially arranged installation hole, the bottom of installation hole is provided with an axially arranged oil filling hole, both ends of oil filling hole are communicated with two ball grooves of outer ring (1) respectively, installation sleeve (5) is installed in installation hole of outer ring (1), upper cover (6) is installed in the upper end of installation sleeve (5), the middle part of upper cover (6) is provided with an oil inlet hole, plug column (7) is elastically installed in the inside of installation sleeve (5) through spring (8), the outer wall of plug column (7) is provided with a gap with the wall of installation sleeve (5), upper cover (6) and plug column (7) are provided with opposite sealing contact surface.

2. A precision heavy duty angular contact ball bearing as claimed in claim 1, wherein, It also includes oil feeding pipe (9), partition plate (10), guide pipe base (11), piston pipe column (12) and spring (13), oil feeding pipe (9) is installed at the bottom of plug column (7), the bottom of oil feeding pipe (9) is closed, the middle part of the side wall of oil feeding pipe (9) is provided with a vertical hole, partition plate (10) is horizontally installed in the middle part of installation sleeve (5), the middle part of partition plate (10) is provided with a sliding hole, oil feeding pipe (9) is slidingly inserted in the sliding hole of partition plate (10), the outer wall of oil feeding pipe (9) is in sliding contact with the sliding hole of partition plate (10), the lower end of spring (8) is installed on partition plate (10), guide pipe base (11) is installed at the bottom of installation sleeve (5), piston pipe column (12) is slidingly installed in the lower part of installation sleeve (5), the upper end of piston pipe column (12) is provided with a piston, the piston is in sliding sealing contact with the inner wall of installation sleeve (5), the lower part of piston pipe column (12) is a vertical pipe, the vertical pipe is provided with an extrusion hole, the vertical pipe of piston pipe column (12) is slidingly inserted in guide pipe base (11), the lower end of spring (13) is connected with guide pipe base (11), the upper end of spring (13) is connected with piston pipe column (12), the elastic force of spring (13) pushes piston pipe column (12) upward.

3. The precision heavy duty angular contact ball bearing of claim 1, wherein, It also includes limiting ring seat (14) and two limiting grooves (15), the inner wall of outer ring (1) is provided with inward protruding limiting ring seat (14) in the middle part, the outer wall of the opposite end of two inner rings (2) is provided with limiting groove (15) matched with the side wall of limiting ring seat (14), the two side walls of limiting ring seat (14) axially limit two limiting grooves (15).

4. A precision heavy duty angular contact ball bearing as claimed in claim 3, wherein, It also includes a plurality of blades (16), a plurality of blades (16) are circumferentially and uniformly installed on the outer wall of the inner end of inner ring (2), a plurality of blades (16) surround the outer side of limiting ring seat (14).

5. A precision heavy duty angular contact ball bearing as claimed in claim 4, wherein, It also includes surface oil groove (17), a plurality of circulating oil holes (18) and sealing plate (19), a plurality of blades (16) are obliquely arranged, the middle part of the outer wall of outer ring (1) is provided with surface oil groove (17), the outer end of a plurality of circulating oil holes (18) passes through surface oil groove (17), the inner end of a plurality of circulating oil holes (18) is provided with an opening on the inner wall of limiting ring seat (14), sealing plate (19) is sealingly installed on the outer port of surface oil groove (17).

6. A precision heavy duty angular contact ball bearing as claimed in claim 1, wherein, The containing structure of the two inner rings (2) is a plurality of spherical grooves (20), and an outwardly protruding annular limiting seat is arranged on the outer wall of the outer end of each of the two inner rings (2), a plurality of spherical grooves (20) are uniformly arranged on the circumference of the two annular limiting seats, and the plurality of spherical grooves (20) are used for rolling and containing a plurality of balls (4).

7. A precision heavy duty angular contact ball bearing as claimed in claim 6, wherein, Two sealing rings (21) and two dust covers (22) are further included, the sealing rings (21) are concentrically arranged on the outer end faces of the two inner rings (2) respectively, the two dust covers (22) are mounted on the two ends of the outer ring (1) respectively, and a sealing surface matched with the sealing ring (21) and a wear-resistant sealing ring are arranged on the inner wall of each of the two dust covers (22).

Images