CN210484431U - Oil pressure floating bearing assembly for electric spindle - Google Patents
Oil pressure floating bearing assembly for electric spindle Download PDFInfo
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- CN210484431U CN210484431U CN201921085056.6U CN201921085056U CN210484431U CN 210484431 U CN210484431 U CN 210484431U CN 201921085056 U CN201921085056 U CN 201921085056U CN 210484431 U CN210484431 U CN 210484431U
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- electric spindle
- oil pressure
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Abstract
The utility model discloses an oil pressure bearing assembly that floats for electricity main shaft, electricity main shaft is including the bearing frame, bearing and rotor, be equipped with the bearing room in the bearing frame, it is indoor that the bearing is located to the bearing, and the bearing housing is located on the rotor, be formed with first clearance between the outer wall of bearing room and the inner wall of bearing frame, the oil storage tank has been seted up to the outer wall of bearing room, be equipped with the oil inlet that is used for pouring into the coolant oil into on the bearing frame and the oil-out that is used for discharging the coolant oil, oil inlet and oil-out communicate respectively in the oil storage tank, the cover is equipped with two sealing washers on the bearing room, the sealing washer presss from both sides tightly between bearing room and bearing frame, and both sides around the oil storage tank are located to two sealing washer branches, when the rotor operates, borrow. The utility model discloses realize that rotor, bearing and bearing room are coaxial to adjusting well based on the suspension mode, cooling efficiency is high, reducible friction, stress reduction simultaneously, and then improves precision, increase of service life.
Description
Technical Field
The utility model relates to an electricity main shaft especially relates to a floating bearing assembly of oil pressure for electricity main shaft.
Background
The electric main shaft is a precise power device applied to a numerical control machine tool, and in order to ensure the stable rotation of a rotor of the electric main shaft, bearing seats are required to be arranged at two ends of the electric main shaft, bearings are installed in the bearing seats, and meanwhile, the bearings are sleeved on the rotor to bear the rotor running at a high speed by virtue of the bearings. However, in the electric spindle in the prior art, the bearing is generally directly installed and fixed in the bearing seat, and it is difficult to cool the bearing externally, because the bearing and the bearing seat are in rigid connection, and the coaxiality of the bearing, the bearing seat and the rotor is ensured, therefore, high requirements are put forward on the processing precision of the bearing seat, the processing cost of the bearing seat is increased, the yield is low, and simultaneously, in the actual manufacturing process, because the bearing seat can not reach the ideal precision, certain stress can be generated among the rotor, the bearing and the bearing seat, the precision and the service life of the electric spindle are seriously influenced, particularly, after the shaft is subjected to thermal expansion, the stress between the bearing and the bearing seat is further increased, the disadvantages are increased, therefore, the bearing assembly part of the existing electric spindle is difficult to meet the main technical requirements of high performance, high precision, long service life and the like.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's not enough, provide one kind based on the suspension mode realize rotor, bearing and bearing room are coaxial to adjusting well, cooling efficiency is high, reducible friction, stress reduction simultaneously, and then improve precision, increase of service life's the oil pressure bearing assembly that floats that is used for electric main shaft.
In order to solve the technical problem, the utility model adopts the following technical scheme.
An oil pressure floating bearing assembly for an electric spindle, the electric spindle comprises a bearing seat, a bearing and a rotor, a bearing chamber is arranged in the bearing seat, the bearing is arranged in the bearing chamber, and the bearing sleeve is arranged on the rotor, a first gap is formed between the outer wall of the bearing chamber and the inner wall of the bearing seat, an oil storage tank is arranged on the outer wall of the bearing chamber, an oil inlet used for injecting cooling oil and an oil outlet used for discharging the cooling oil are arranged on the bearing seat, the oil inlet and the oil outlet are respectively communicated with the oil storage tank, two sealing rings are sleeved on the bearing chamber, the sealing rings are clamped between the bearing chamber and the bearing seat, and the two sealing rings are respectively arranged at the front side and the rear side of the oil storage tank, when the rotor is in operation, the bearing chamber and the bearing are held at a position coaxial with the rotor by the oil pressure in the first gap.
Preferably, the oil reservoir extends in a circumferential direction of the bearing chamber.
Preferably, the oil inlet and the oil outlet are symmetrically arranged on the left side and the right side of the bearing seat.
Preferably, a second gap is formed between an outer wall of the bearing and an inner wall of the bearing chamber.
Preferably, a fixing plate is arranged on the rear end face of the bearing seat and abuts against the rear end of the bearing chamber.
Preferably, a fixing groove is formed in the rear end face of the bearing chamber, and the fixing piece is clamped in the fixing groove.
Preferably, two seal ring grooves are formed in the bearing chamber, and the two seal rings are respectively clamped in the two seal ring grooves.
Preferably, a transition plate is fixed at the rear end of the bearing seat, an inner ring of the transition plate extends towards the rotor, and the bearing chamber are both located in a space formed by the transition plate and the bearing seat.
Preferably, a bearing pressing ring is screwed at an opening at the rear end of the bearing chamber, the bearing pressing ring abuts against the rear end of the bearing, and a third gap is formed between the bearing pressing ring and the transition plate.
Preferably, a plurality of springs are embedded in the bearing seat and uniformly distributed along the circumferential direction of the bearing seat, and the springs elastically abut against the front end face of the bearing chamber.
The utility model discloses an among the oil pressure floating bearing subassembly for electricity main shaft, after the cooling oil was poured into the oil storage tank by the oil inlet, the accessible oil storage tank was filled the cooling oil in first clearance, fill promptly in the bearing room with between the bearing frame, help cooling the bearing, be in simultaneously the bearing room with set up two sealing washers between the bearing frame, work as when the high-speed operation of rotor, the bearing room is under the effect of cooling oil, cooperates the small deformation of sealing washer for bearing room and bearing are the suspended state, and keep with the position of the axle center of rotor. Compared with the prior art, the utility model discloses with the coaxial of suspension mode realization bearing, bearing room and rotor well, avoided producing rigid stress between bearing, bearing room and the rotor, the friction between the part that has significantly reduced has effectively improved the electricity main shaft precision, has prolonged the life of electricity main shaft, based on above-mentioned structure, has still reduced the machining precision requirement to the bearing housing to reduce the processing cost and improved the yield, from this it can be seen that the utility model discloses be fit for popularizing and applying in high accuracy power devices such as electricity main shaft, and have better application prospect.
Drawings
FIG. 1 is a cross-sectional view of the oil pressure floating bearing assembly of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a perspective view of the bearing housing;
fig. 4 is a cross-sectional view of another angle of the oil pressure floating bearing assembly of the present invention.
Detailed Description
The present invention will be described in more detail with reference to the accompanying drawings and examples.
The utility model discloses an oil pressure floating bearing assembly for an electric spindle, which is shown by combining figures 1 to 4, the electric spindle comprises a bearing seat 1, a bearing 2 and a rotor 3, a bearing chamber 4 is arranged in the bearing seat 1, the bearing 2 is arranged in the bearing chamber 4, the bearing 2 is sleeved on the rotor 3, a first gap 20 is formed between the outer wall of the bearing chamber 4 and the inner wall of the bearing seat 1, an oil storage tank 40 is arranged on the outer wall of the bearing chamber 4, an oil inlet 10 for injecting cooling oil and an oil outlet 11 for discharging the cooling oil are arranged on the bearing seat 1, the oil inlet 10 and the oil outlet 11 are respectively communicated with the oil storage tank 40, two sealing rings 41 are sleeved on the bearing chamber 4, the sealing rings 41 are clamped between the bearing chamber 4 and the bearing seat 1, and the two sealing rings 41 are respectively arranged on the front side and the back side of the oil storage tank 40, when the rotor 3 is in operation, the bearing chamber 4 and the bearing 2 are held at positions coaxial with the rotor 3 by the oil pressure in the first gap 20.
In the above structure, after the cooling oil is injected into the oil storage groove 40 from the oil inlet 10, the cooling oil can be filled in the first gap 20 through the oil storage groove 40, that is, the cooling oil is filled between the bearing chamber 4 and the bearing seat 1, which is helpful for cooling the bearing 2, and meanwhile, two sealing rings 41 are arranged between the bearing chamber 4 and the bearing seat 1, when the rotor 3 runs at a high speed, the bearing chamber 4 is matched with the small deformation of the sealing ring 41 under the effect of the cooling oil, so that the bearing chamber 4 and the bearing 2 are in a suspension state and are kept at the position coaxial with the rotor 3. Compared with the prior art, the utility model discloses realize the coaxial of bearing, bearing room and rotor with the suspension mode and adjust well, avoided producing rigid stress between bearing, bearing room and the rotor, the friction between the part that has significantly reduced has effectively improved the electricity main shaft precision, has prolonged the life of electricity main shaft, based on above-mentioned structure, has still reduced the machining precision requirement to bearing housing 1 to reduce the processing cost and improved the yield, from this it is visible, the utility model discloses be fit for popularizing and applying in high accuracy power devices such as electricity main shaft, and have better application prospect.
In order to guide the cooling oil, the oil reservoir 40 extends in the circumferential direction of the bearing chamber 4. The oil reservoir 40 may have various shapes such as a ring shape, an arc shape, and an S shape.
Further, the oil inlet 10 and the oil outlet 11 are symmetrically arranged on the left side and the right side of the bearing seat 1.
Preferably, a second gap 21 is formed between an outer wall of the bearing 2 and an inner wall of the bearing chamber 4. The second gap 21 has the effects that when the bearing 2 is heated and expanded, the second gap 21 can be filled with cooling oil, so that the bearing 2 and the bearing chamber 4 are in a temperature gradient from high to low, the bearing 2 and the bearing chamber 4 are tightly combined at the moment, the precision of the electric spindle is effectively improved, the internal and external heat transfer efficiency of the bearing 2 and the bearing chamber 4 is improved, and the cooling of the bearing 2 is facilitated.
In order to fix the bearing chamber 4, in this embodiment, the rear end surface of the bearing seat 1 is provided with a fixing plate 5, and the fixing plate 5 abuts against the rear end of the bearing chamber 4.
Furthermore, a fixing groove 42 is formed in a rear end surface of the bearing chamber 4, and the fixing piece 5 is engaged with the fixing groove 42.
In order to limit the sealing ring 41, in this embodiment, two sealing ring grooves 43 are formed in the bearing chamber 4, and the two sealing rings 41 are respectively clamped in the two sealing ring grooves 43.
Preferably, a transition plate 8 is fixed at the rear end of the bearing seat 1, an inner ring of the transition plate 8 extends towards the rotor 3, and the bearing 2 and the bearing chamber 4 are both located in a space formed by the transition plate 8 and the bearing seat 1.
In order to clamp the bearing 2, in the embodiment, a bearing press ring 7 is screwed to the opening at the rear end of the bearing chamber 4, the bearing press ring 7 abuts against the rear end of the bearing 2, and a third gap 22 is formed between the bearing press ring 7 and the transition plate 8.
Preferably, a plurality of springs 6 are embedded in the bearing seat 1, the plurality of springs 6 are uniformly distributed along the circumferential direction of the bearing seat 1, and the springs 6 elastically abut against the front end surface of the bearing chamber 4. Under the cooperation of the third gap 22 and the spring 6, the bearing chamber 4 has a certain elastic movement margin in the front-rear direction, and the floating performance of the bearing chamber 4 is further improved by the cooperation of the oil pressure of the bearing chamber 4.
The above is only the embodiment of the present invention, and is not intended to limit the present invention, and all modifications, equivalent replacements or improvements made within the technical scope of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. An oil pressure floating bearing assembly for an electric spindle, the electric spindle comprises a bearing seat, a bearing and a rotor, it is characterized in that a bearing chamber is arranged in the bearing seat, the bearing is arranged in the bearing chamber, and the bearing sleeve is arranged on the rotor, a first gap is formed between the outer wall of the bearing chamber and the inner wall of the bearing seat, an oil storage tank is arranged on the outer wall of the bearing chamber, an oil inlet used for injecting cooling oil and an oil outlet used for discharging the cooling oil are arranged on the bearing seat, the oil inlet and the oil outlet are respectively communicated with the oil storage tank, two sealing rings are sleeved on the bearing chamber, the sealing rings are clamped between the bearing chamber and the bearing seat, and the two sealing rings are respectively arranged at the front side and the rear side of the oil storage tank, when the rotor is in operation, the bearing chamber and the bearing are held at a position coaxial with the rotor by the oil pressure in the first gap.
2. The oil pressure floating bearing assembly for an electric spindle according to claim 1, wherein said oil reservoir extends in a circumferential direction of said bearing chamber.
3. The oil pressure floating bearing assembly for an electric spindle according to claim 1, wherein said oil inlet and outlet ports are symmetrically provided at left and right sides of said bearing housing.
4. The oil pressure floating bearing assembly for an electric spindle according to claim 1, wherein a second gap is formed between an outer wall of the bearing and an inner wall of the bearing chamber.
5. The oil pressure floating bearing assembly for an electric spindle according to claim 1, wherein a rear end surface of the bearing housing is provided with a fixing piece which abuts against a rear end of the bearing chamber.
6. The oil pressure floating bearing assembly for an electric spindle according to claim 5, wherein a fixing groove is formed at a rear end surface of the bearing chamber, and the fixing piece is engaged in the fixing groove.
7. The oil pressure floating bearing assembly for an electric spindle according to claim 1, wherein the bearing housing is formed with two seal grooves, and the two seals are respectively engaged with the two seal grooves.
8. The oil pressure floating bearing assembly for an electric spindle according to claim 1, wherein a transition plate is fixed to a rear end of the bearing housing, an inner race of the transition plate extends in the direction of the rotor, and the bearing chamber are located in a space formed by the transition plate and the bearing housing.
9. The oil pressure floating bearing assembly for an electric spindle according to claim 8, wherein a bearing pressing ring is screwed to an opening at a rear end of the bearing chamber, the bearing pressing ring abuts against a rear end of the bearing, and a third gap is formed between the bearing pressing ring and the transition plate.
10. The oil pressure floating bearing assembly for an electric spindle according to claim 9, wherein a plurality of springs are embedded in the bearing housing, the plurality of springs are uniformly distributed along a circumferential direction of the bearing housing, and the springs elastically abut against a front end surface of the bearing chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085056.6U CN210484431U (en) | 2019-07-11 | 2019-07-11 | Oil pressure floating bearing assembly for electric spindle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921085056.6U CN210484431U (en) | 2019-07-11 | 2019-07-11 | Oil pressure floating bearing assembly for electric spindle |
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| Publication Number | Publication Date |
|---|---|
| CN210484431U true CN210484431U (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921085056.6U Active CN210484431U (en) | 2019-07-11 | 2019-07-11 | Oil pressure floating bearing assembly for electric spindle |
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| CN (1) | CN210484431U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360230A (en) * | 2019-07-11 | 2019-10-22 | 深圳市爱贝科精密机械有限公司 | A kind of oil pressure floating bearing component for electro spindle |
-
2019
- 2019-07-11 CN CN201921085056.6U patent/CN210484431U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360230A (en) * | 2019-07-11 | 2019-10-22 | 深圳市爱贝科精密机械有限公司 | A kind of oil pressure floating bearing component for electro spindle |
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Address after: 518111 1st and 2nd floors, building A6, silicon valley power intelligent terminal Industrial Park, No.20, Dafu Industrial Zone, Aobei community, Guanlan street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen aibeike Precision Industry Co.,Ltd. Address before: 518111 2nd floor, building A6, silicon valley power intelligent terminal Industrial Park, 20 Dafu Industrial Zone, Aobei community, Guanlan street, Longhua New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN ABIG PRECISION MACHINERY Co.,Ltd. |