CN212868174U

CN212868174U - Rolling bearing for oil-gas lubrication

Info

Publication number: CN212868174U
Application number: CN202021481641.0U
Authority: CN
Inventors: 蔡丰益
Original assignee: Longma Precision Technology Co ltd
Current assignee: Longma Precision Technology Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-04-02
Anticipated expiration: 2030-07-24

Abstract

A rolling bearing for oil-gas lubrication comprises an outer ring, an inner ring, a plurality of rolling bodies in rolling contact between the outer ring and the inner ring, and an oil supply ring, and the outer ring is extended integrally toward one axial side thereof with an outer ring extension part, and the outer peripheral surface of the outer ring extension part is provided with a supply hole penetrating to the inner peripheral surface thereof, the inner ring has an inner ring extension part corresponding to the outer ring extension part, so that an annular assembling space is formed between the outer ring extension part and the inner ring extension part, the oil supply ring is relatively accommodated in the assembling space and is fixedly connected with the extension part of the outer ring, a channel is formed inside the oil supply ring, one end of the channel is communicated with the supply hole, and the other end of the channel is communicated to the end face, facing the rolling body, of the oil supply ring, so that oil particles and high-pressure air supplied by the external oil circuit can sequentially pass through the supply hole and the channel to directly perform oil-gas lubrication on the rolling body.

Description

Rolling bearing for oil-gas lubrication

Technical Field

The present invention relates to a bearing device, and more particularly to a rolling bearing for oil-gas lubrication.

Background

Rolling bearings have been widely used in high-speed spindles of machine tools as important elements for supporting rotating shafts and bearing loads because of their high load, low running friction, small rotational runout, high rigidity, etc., but the running speed of rolling bearings depends on the material, precision and preload of bearings, and the use of proper lubrication is also critical to achieving high rotational speed of rolling bearings.

As shown in FIG. 5, a conventional oil-air lubrication arrangement for a rolling bearing is mainly to provide a nozzle opening 92 for supplying oil to the side of the rolling bearing 91, and to supply high-pressure air and fine oil particles to the inside of the rolling bearing 61 from the side of the rolling bearing through the nozzle opening 92, so as to achieve the oil-air lubrication effect. However, the oil-air lubrication arrangement of the conventional rolling bearing requires additional arrangement of the nozzle opening 92 and the corresponding spacer 93, which results in more parts on the main shaft, increased cost, complicated assembly and time consumption, and the excessive components to be assembled cause the assembly tolerance among the components to be overlapped, resulting in a great reduction of the overall precision. Moreover, for the rolling bearing 91 applied to the high-speed spindle, providing a proper bearing preload (or axial load) not only can eliminate the internal clearance of the bearing, increase the rigidity of the spindle, and reduce the vibration and noise during the operation of the spindle, but also will affect the original bearing preload amount because the conventional oil-gas lubrication arrangement of the rolling bearing requires additional nozzle ports 92 and corresponding spacer 93 members to be connected to the sides of the rolling bearing 91.

Therefore, it is the primary objective of the present invention to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The main object of the utility model is to provide a antifriction bearing for oil-gas lubrication, it has can effectively reduce the part, ensures the equipment precision and assembles more convenient efficiency fast to have simultaneously and can not influence the bearing pre-compaction volume, and can promote its lubricated and radiating effect's efficiency.

In order to achieve the above object, the present invention provides a rolling bearing for oil-gas lubrication, comprising:

an outer ring, which has an outer ring body part, wherein the inner peripheral surface of the outer ring body part is provided with an outer ring rail groove, the outer ring body part is integrally extended towards one axial side of the outer ring body part to form an outer ring extension part, and the outer peripheral surface of the outer ring extension part is radially provided with a supply hole which penetrates through the inner peripheral surface of the outer ring extension part;

an inner ring, which has an inner ring body part, wherein an inner ring rail groove is formed on the outer peripheral surface of the inner ring body part, and an inner ring extension part corresponding to the outer ring extension part is integrally extended from the inner ring body part, so that an annular assembling space is formed between the outer ring extension part and the inner ring extension part;

a plurality of rolling bodies arranged between the outer ring rail groove and the inner ring rail groove in rolling contact; and

and the oil supply ring is arranged in the assembling space and is fixedly connected with the extending part of the outer ring, a channel is formed in the oil supply ring, one end of the channel is communicated with the supply hole, and the other end of the channel penetrates through one end face, facing the inner ring rail groove, of the oil supply ring.

Preferably, the inner ring body is configured such that an outer circumferential surface of the inner ring body connected to the inner ring extension gradually expands toward the set of space to form an inclined surface.

Preferably, the outer ring extension is further concavely provided with a slot at an end angle position of the inner circumferential surface facing the assembly space, the oil supply ring is outwardly expanded at an outward end side to form a retaining edge, and the retaining edge of the oil supply ring is relatively retained by the slot when the oil supply ring is axially inserted into the assembly space, so as to position the assembly position of the oil supply ring. Furthermore, the outer ring and the inner ring have the same axial width, and the axial width of the clamping groove is larger than the axial width of the blocking edge, so that when the blocking edge of the oil supply ring is relatively abutted against the clamping groove, the outward end side of the oil supply ring can be relatively positioned in the group setting space.

Preferably, a ring-shaped retainer is further disposed between the outer ring body and the inner ring body, the retainer has a plurality of pockets for respectively receiving one rolling element, so that the rolling elements are respectively retained at intervals in the circumferential direction, and the oil supply ring is further retracted at a portion of the end surface facing the retainer to form a retracted surface, so that a proper distance can be maintained between the oil supply ring and the retainer.

The above objects and advantages of the present invention will be readily understood by the following detailed description of the selected embodiments and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an assembly diagram of the oil supply ring of the present invention.

Fig. 3 is a partially enlarged schematic view of the present invention.

Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

FIG. 5 is a schematic view of the oil-air lubrication arrangement of a conventional rolling bearing.

Detailed Description

In the following description of the embodiments, the term "axial direction" refers to the direction of the rotation axis of the rolling bearing of the present invention, and the term "radial direction" refers to the direction of the radius of the rolling bearing of the present invention.

First, please refer to fig. 1, which illustrates a rolling bearing for oil-gas lubrication according to the present invention, which mainly comprises an outer ring 11, an inner ring 21, a plurality of rolling elements 31 capable of rolling in contact with a specific contact angle between the outer ring 11 and the inner ring 21, and an oil supply ring 41, wherein:

the outer ring 11 is circular and has an outer ring body 12, the inner peripheral surface of the outer ring body 12 is circumferentially provided with an arc-shaped outer ring rail groove 121, the outer ring body 12 is extended outward to one axial side to form an outer ring extension 13, and the outer peripheral surface of the outer ring extension 13 is radially provided with a supply hole 131 penetrating the inner peripheral surface of the outer ring extension 13.

The inner ring 21 is disposed coaxially inside the outer ring 11, the inner ring 21 has an inner ring body 22, the inner ring body 22 is circumferentially provided with an arc inner ring rail groove 221, and the inner ring body 22 is extended outward to one axial side to form an inner ring extension 23 with a length equal to that of the outer ring extension 13, so that an annular assembling space 24 is formed between the outer ring extension 13 and the inner ring extension 23, and the outer peripheral surface of the inner ring body 22 connected to the inner ring extension 23 is gradually expanded toward the assembling space 24 to form an inclined surface 222.

The rolling elements 31 are spherical bodies in this embodiment, and the rolling elements 31 are disposed between the outer ring body 12 and the inner ring body 22 and are in rolling contact with the outer ring rail groove 121 and the inner ring rail groove 221 respectively at specific contact angles to form an oblique contact rolling bearing; further, a ring-shaped retainer 32 is disposed between the outer ring body 12 and the inner ring body 22, and the retainer 32 has a plurality of pockets 33 for respectively accommodating one rolling element 31, so that the rolling elements 31 are respectively retained in the circumferential direction thereof at intervals, and the rolling elements 31 are respectively ensured to be in rolling contact with the outer ring rail groove 121 and the inner ring rail groove 221 at specific contact angles.

The oil supply ring 41 is formed by an annular member, the oil supply ring 41 is relatively inserted into the set space 24 along the axial direction and is fixedly connected with the outer ring extension portion 13, a channel 42 is formed inside the oil supply ring 41, one end of the channel 42 is communicated with the supply hole 131, the other end of the channel 42 is bent to penetrate through an end surface 43 of the oil supply ring 41 facing the inner ring rail groove 221, the oil supply ring 41 can be tightly fitted on the inner circumferential surface of the outer ring extension portion 13 through a tight fit or gluing method of coating adhesive, so that the oil supply ring 41 and the outer ring extension portion 13 can be fixedly connected together, and a gap is reserved between the outer circumferential surfaces of the oil supply ring 41 and the inner ring extension portion 23 to ensure that the oil supply ring 41 does not obstruct the rotation of the inner ring 21.

And constitute through above-mentioned structure and can directly build in the inside of bearing with this oil feed ring 41 to constitute the utility model provides a antifriction bearing for oil-gas lubrication to and then make the oil grain and the highly-compressed air that outside oil circuit (not shown) supplied with can be according to the preface through this supply hole 131 and this passageway 42, and directly carry out oil-gas lubrication to the position of meeting of this inner ring rail groove 221 and rolling element 31 along this inclined plane 222.

Furthermore, in the present embodiment, the outer ring extension 13 is further concavely provided with a locking groove 132 at the inner circumferential end corner position facing the group of the installation spaces 24, the oil supply ring 41 is outwardly expanded to form a retaining edge 441 at the outward end side 44, and when the oil supply ring 41 is axially inserted into the group of the installation spaces 24, the retaining edge 441 of the oil supply ring 41 is relatively stopped by the locking groove 132 to position the group installation position of the oil supply ring 41, so that the passage 42 of the oil supply ring 41 can be positioned at the position mutually communicated with the supply hole 131, and the oil supply ring 41 is more easily and quickly assembled. And the oil supply ring 41 is further retracted to form an inwardly retracted surface 45 on a portion of the end surface facing the retainer 32, so that a proper distance can be maintained between the oil supply ring 41 and the retainer 32, thereby preventing the oil supply ring 41 and the retainer 32 from rubbing or colliding with each other during actual use. In addition, in the embodiment, the outer ring 11 and the inner ring 21 have the same axial width, and the axial width D1 of the locking groove 132 is greater than the axial width D2 of the blocking edge 441, so that when the oil supply ring 41 is abutted against the locking groove 132 with the blocking edge 441 thereof, the outward end side 44 of the oil supply ring 41 can be relatively located inside the group setting space 24, that is, after the oil supply ring 41 is relatively set in the group setting space 24, the outward end side 44 of the oil supply ring 41 does not protrude out of the group setting space 24.

And the utility model provides a antifriction bearing for oil-gas lubrication has following advantage:

1. the utility model provides a antifriction bearing for oil-gas lubrication utilizes and directly builds in the inside of bearing with this fuel feeding ring 41, consequently need not to dispose the component such as fuel feeding mouth and space ring again at the axial of its bearing distolaterally promptly, not only can effectively reduce the part, makes its oil-gas lubrication's structure become simple, and further through reducing its main epaxial component part, more can reduce the assembly tolerance between too much equipment component relatively to effectively promote its equipment precision.

2. The utility model provides a rolling bearing for oil-gas lubrication further utilizes the flange 441 of this oil feeding ring 41 and the matched stack position location relation between draw-in groove 132 of this outer loop extension 13, make its equipment work can be fairly easy, fast, and then can promote its packaging efficiency by a wide margin, and this oil feeding ring 41 is formed with this internal contraction face 45 in the partial terminal surface that should keep ware 32 in the orientation more internal contraction, make this oil feeding ring 41 and should keep keeping and keep keeping and keeping and keeping and keeping 32 looks mutual friction or collision more effectively.

3. The utility model provides a antifriction bearing for oil-gas lubrication utilizes and builds in the inside of bearing this oil feeding ring 41 is direct, consequently need not to dispose promptly at the axial of its bearing distolaterally and supply oil mouth and component such as space ring again, and can not influence original bearing pre-compaction volume to and can ensure that the dimension treats the main shaft rigidity, the production of vibration, noise when reducing the high-speed operation of main shaft.

4. The utility model provides a antifriction bearing for oil-gas lubrication, the utilization is with this oil feed ring 41 direct built-in the inside of bearing, the oil grain that makes the outside oil circuit supply with can be according to the preface through this supply hole 131 and this passageway 42, and directly carry out oil-gas lubrication to the position of meeting of this inner ring rail groove 221 and rolling element 31 along this inclined plane 222, and because the main shaft is rotatory with this inner ring 21 of synchronous drive during the operation, consequently can be to this inner ring 21 when rotatory with the rolling element 31 between the contact position directly lubricate and dispel the heat through aforementioned configuration, make its lubricated better with radiating effect.

5. The utility model provides a rolling bearing for oil-gas lubrication further has the outside extension setting of an organic whole respectively through this outer loop 11 and this inner ring 21, and can effectively increase its heat radiating area (the whole width widen of bearing promptly), it is better to make its radiating effect, and the outside extension that extends of this outer loop 11 and this inner ring 21 an organic whole, more can further reduce its outer loop 11 and inner ring 21 in the grinding volume of carrying out axial width man-hour, it can be more quick in making this outer loop 11 and this inner ring 21, and reduce the waste of material.

Next, please refer to fig. 4, which is a second embodiment of the present invention, and the difference between the second embodiment and the above embodiment is that the oil supply ring 41 of the second embodiment is fixedly connected to the outer ring 11 through a positioning member 51, wherein: at least one positioning hole 133 penetrating through the outer circumferential surface of the outer ring extension 13 in the radial direction is further formed on the outer circumferential surface of the outer ring extension 13, and a set of holes 46 capable of communicating with the positioning hole 133 correspondingly are formed on the oil supply ring 41, so that after the oil supply ring 41 is relatively inserted into the set of space 24 in the axial direction, the oil supply ring 41 and the outer ring extension 13 can be fixedly connected together only by inserting a positioning member 51 formed by a bolt into the positioning hole 133 and the set of holes 46 correspondingly, and the oil supply ring 41 can be directly built in the bearing. Of course, in other possible embodiments, the positioning member 51 may be formed by a bolt, and the inner edges of the set of holes 46 are provided with corresponding thread segments, so that the oil supply ring 41 and the outer ring extension 13 can be fixed together by screwing, and the oil supply ring 41 can also be directly built in the bearing.

The above description is the preferred embodiment of the present invention and the technical principle applied by the same, and for those skilled in the art, without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformation, simple replacement, etc. based on the technical solution of the present invention all belong to the protection scope of the present invention.

Claims

1. The utility model provides a antifriction bearing for oil-gas lubrication which characterized in that, it is including:

2. The rolling bearing for oil-gas lubrication according to claim 1, characterized in that: the inner ring body is used for gradually expanding the outer peripheral surface connected with the inner ring extension part towards the group of arrangement spaces to form an inclined surface.

3. The rolling bearing for oil-gas lubrication according to claim 1, characterized in that: the outer ring extension part is provided with a clamping groove at the end angle position of the inner circumferential surface facing the assembly space in a concave manner, the oil supply ring is provided with a blocking edge at the outward end side in an outward expanding manner, and when the oil supply ring is inserted into the assembly space along the axial direction, the blocking edge of the oil supply ring can be blocked by the clamping groove relatively so as to position the assembly position of the oil supply ring.

4. The rolling bearing for oil-gas lubrication according to claim 3, wherein: the outer ring and the inner ring have the same axial width, and the axial width of the clamping groove is larger than that of the blocking edge, so that when the blocking edge of the oil supply ring is relatively abutted against the clamping groove, the outward end side of the oil supply ring can be relatively positioned in the assembling space.

5. The rolling bearing for oil-gas lubrication according to claim 1, characterized in that: an annular retainer is arranged between the outer ring body part and the inner ring body part, a plurality of pockets capable of respectively containing a rolling body are arranged on the retainer, so that the rolling bodies can be respectively retained in the circumferential direction of the retainer at intervals, and an inward contraction surface is formed by inward contraction of part of the end surface of the oil supply ring facing the retainer, so that a proper distance can be kept between the oil supply ring and the retainer.

6. The rolling bearing for oil-gas lubrication according to claim 1, characterized in that: the oil supply ring is tightly fitted and embedded on the inner circumferential surface of the outer ring extension part, so that the oil supply ring and the outer ring extension part can be fixedly connected together.

7. The rolling bearing for oil-gas lubrication according to claim 1, characterized in that: the oil supply ring is closely connected with the inner circumferential surface of the outer ring extension part in a gluing mode, so that the oil supply ring and the outer ring extension part can be fixedly connected with each other.

8. The rolling bearing for oil-gas lubrication according to claim 1, characterized in that: the outer peripheral surface of the outer ring extension part is provided with at least one positioning hole which penetrates through the inner peripheral surface of the outer ring extension part along the radial direction, the oil supply ring is provided with a group setting hole which can be correspondingly communicated with the positioning hole, and after the oil supply ring is relatively inserted into the group setting space along the axial direction, a positioning piece is correspondingly inserted into the positioning hole and the group setting hole, so that the oil supply ring and the outer ring extension part are fixedly connected together.