CN103231078A - Device suitable for pre-tightening main shaft bearing of precision machine tool - Google Patents
Device suitable for pre-tightening main shaft bearing of precision machine tool Download PDFInfo
- Publication number
- CN103231078A CN103231078A CN2013101168611A CN201310116861A CN103231078A CN 103231078 A CN103231078 A CN 103231078A CN 2013101168611 A CN2013101168611 A CN 2013101168611A CN 201310116861 A CN201310116861 A CN 201310116861A CN 103231078 A CN103231078 A CN 103231078A
- Authority
- CN
- China
- Prior art keywords
- bearing
- inlet passage
- oil cavity
- annular oil
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention discloses a device suitable for pre-tightening a main shaft bearing of a precision machine tool. The device comprises a main shaft, a lock nut, a gasket, a box body seat, an end cap, a clamp ring and an improved bearing pre-tightening device, wherein the improved bearing pre-tightening device adopts an annular oil cavity structure with a transformed single-side thin-wall end surface; the main shaft penetrates through the end cap, the clamp ring, a bearing B, a shaft sleeve, a bearing A, the gasket and the lock nut from one end to the other end sequentially; and the improved bearing pre-tightening device is mounted between the main shaft and the box body seat. According to the device, a conventional bearing pre-tightening device between the bearing A and the bearing B is improved, so that on one hand, the improved bearing pre-tightening device can be taken as a support of an annular oil cavity D and provides an oil inlet channel, and on the other hand, the device can be taken as a support of the bearing B, so that radial positioning of the bearing B and axial positioning of the main shaft can be achieved, and accordingly, the axial rigidity of the main shaft is improved.
Description
Technical field
The present invention relates to a kind of pre-tightening apparatus that is applicable to bearing, more particularly say, refer to a kind of device that is applicable to precision machine tool main shaft bearing pretension.
Background technology
For precision and the dynamic characteristic that improves the precision machine tool main shaft, need carry out pretension to bearing usually.The bearing pre-tightened device of bilateral thin-walled end face structure as shown in Figure 1, this device can reduce because the distortion of thin-walled oil pocket makes the main shaft axial rigidity.Main shaft 1 passes end cap 7, hold-down ring 9, B bearing 8, axle sleeve 5, A bearing 4, pad 2A and locking nut 2 in turn from an end to the other end; Between main shaft 1 and the housing seat 3 the bearing pre-tightened device is installed, described bearing pre-tightened device includes A annular oil cavity 11, B annular oil cavity 12, A bearing 4, B bearing 8, axle sleeve 5, packing ring 6.
In Fig. 1, Figure 1A, the main shaft 1 of high-accuracy lathe is carrying out running at a high speed, in order to guarantee the dynamic characteristic of main shaft 1, and can be to the A bearing 4 and the B bearing 8 supply pressure oil that are socketed on the main shaft 1.The pressure oil of introducing from the outside enters the oil-in chamber 11E of A annular oil cavity 11 and the oil-in chamber 12E of B annular oil cavity 12 along the first oil inlet passage 3A, the described first oil inlet passage 3A is arranged on the housing seat 3, the first oil inlet passage 3A and the second oil inlet passage 12D conducting, the second oil inlet passage 12D is arranged on the outer ring body 12C of B annular oil cavity 12.In order to realize the sealing between A annular oil cavity 11 and the B annular oil cavity 12, be socketed with sealing ring 13 in A annular oil cavity 11 and B annular oil cavity 12 contact positions.
The outer ring body 11C of A annular oil cavity 11 and the inwall interference fit of housing seat 3, an end interference fit of the inner ring body 11B of A annular oil cavity 11 and packing ring 6, the outer ring 4B interference fit of the base plate 11A of A annular oil cavity 11 and A bearing 4.
The outer ring body 12C of B annular oil cavity 12 and the inwall interference fit of housing seat 3, the inner ring body 12B of B annular oil cavity 12 and the other end interference fit of packing ring 6, the outer ring 8B interference fit of the base plate 12A of B annular oil cavity 12 and B bearing 8.
The base plate 11A of described A annular oil cavity 11 is thin-wall construction, under the active force of pressure oil, makes thin-walled (being base plate 11A) be out of shape, thereby forms B to axial force, and described B is applied to axial force on the outer ring 4B of A bearing 4, the final pretension of realizing A bearing 4;
The base plate 12A of described B annular oil cavity 12 is thin-wall construction, under the active force of pressure oil, makes thin-walled (being base plate 12A) be out of shape, thereby forms A to axial force, and described A is applied to axial force on the outer ring 8B of B bearing 8, the final pretension of realizing B bearing 8.
The bearing pre-tightened device of bilateral thin-walled end face structure as shown in Figure 1, be subjected at the same time A to axial force and B under the effect of axial force, the axial rigidity of the main shaft 1 that runs up is relatively low.
Summary of the invention
For the low defective of main shaft axial rigidity that the oil pocket that improves bilateral thin-walled end face structure causes, the present invention has designed a kind of device that is applicable to precision machine tool main shaft bearing pretension.This device adopts the oil pocket deformation of thin membrane to realize bearing pre-tightened, is the oil pocket structure with one-sided thin-walled face deformation, and it has simplified the oil pocket structure, is convenient to oil pocket processing, installs and sealing.Use D annular oil cavity bearing 22 and replace B annular oil cavity 12, and two end faces of D annular oil cavity bearing 22 directly contact with housing seat 3 with B bearing 8 respectively, when main shaft 1 was subjected to B to axial force, the axial rigidity of main shaft 1 can not weaken because of the distortion of C annular oil cavity 21.
A kind of device that is applicable to precision machine tool main shaft bearing pretension of the present invention, this device include main shaft (1), locking nut (2), pad (2A), housing seat (3), end cap (7), hold-down ring (9); It is characterized in that: also include improved bearing pre-tightened device;
Described improved bearing pre-tightened device includes C annular oil cavity (21), D annular oil cavity (22), A bearing (4), B bearing (8), axle sleeve (5), second packing ring (25);
C annular oil cavity (21) is provided with base plate (21A), inner ring body (21B), outer ring body (21C), oil-in chamber (21E) between inner ring body (21B) and the outer ring body (21C); This oil-in chamber (21E) is used for storage pressure oil;
The inwall of inner ring body (21B) cooperates with the outer wall of the column (25B) of second packing ring (25), and the outer wall of inner ring body (21B) cooperates with the first boss body (22A) of D annular oil cavity (22);
The outer wall of outer ring body (21C) cooperates with the inwall of housing seat (3), and the inwall of outer ring body (21C) cooperates with the first boss body (22A) of D annular oil cavity (22);
D annular oil cavity (22) is provided with the first boss body (22A), the second boss body (22B), the 3rd boss body (22C), linkage section (22D);
The first boss body (22A) is provided with groove, and this groove is used for placing second sealing ring (23); The first boss body (22A) is provided with the 3rd oil inlet passage (22F), the 3rd oil inlet passage (22F) and second oil inlet passage (22E) conducting; The first boss body (22A) is connected and sealed by second sealing ring (23) with the openend of C annular oil cavity (21);
The second boss body (22B) is provided with second oil inlet passage (22E), this second oil inlet passage (22E) and the 4th oil inlet passage (22G) and the 3rd oil inlet passage (22F) conducting; And the openend of second oil inlet passage (22E) and first oil inlet passage (3A) conducting; The second boss body (22B) is connected and sealed by the 3rd sealing ring (23) with first boss (31) of housing seat (3);
Linkage section (22D) is provided with the 4th oil inlet passage (22G), and the end of the 4th oil inlet passage (22G) is equipped with obstruction (24);
The joint of the second boss body (22B) and the 3rd boss body (22C) is combined with the base plate (25A) of second packing ring (25);
The joint of the 3rd boss body (22C) and linkage section (22D) is combined with the outer ring (8B) of B bearing (8);
The outer wall of linkage section (22D) cooperates with the inwall of housing seat (3);
Second packing ring (25) is provided with base plate (25A) and column (25B);
One end face of base plate (25A) cooperates with the outer ring (8B) of B bearing (8), and the other end of base plate (25A) cooperates with the longitudinal terminal surface of the second boss body (22B) of D annular oil cavity (22);
The outer wall leading portion of column (25B) cooperates with the outer wall of the inner ring body (21B) of C annular oil cavity (21), and the outer wall back segment of column (25B) cooperates with the transverse end surface of the second boss body (22B) of D annular oil cavity (22).
The advantage of the device of the main shaft bearing pretension with one-sided thin-walled oil pocket structure of the present invention is:
1. the D annular oil cavity bearing 22 of design is on the one hand as the bearing of C annular oil cavity 21 with the oil-feed oil circuit is provided; On the other hand as the bearing of B bearing 8, can realize B bearing 8 radially with main shaft 1 location in the axial direction.
2. existing circular radial cylinder cooperates again by hold-down ring 9 and compresses from end face D annular oil cavity bearing 22 and being connected of housing seat 3, has guaranteed connection reliability and main shaft axial location rigidity.
3. adopt the oil pocket structure of one-sided thin-walled face deformation, simplified the oil pocket structure, be convenient to oil pocket processing, install and sealing.This oil pocket structure makes the outer ring 8B end face of B bearing 8 directly contact with the end face of D annular oil cavity bearing 22, when main shaft be subjected to B to axial force the time, its axial rigidity can not weaken because of the distortion of C annular oil cavity 21.
Description of drawings
Fig. 1 is the bearing pre-tightened device of bilateral thin-walled end face structure.
Figure 1A is the enlarged drawing of the bearing pre-tightened device part among Fig. 1.
Fig. 2 is the device that is applicable to precision machine tool main shaft bearing pretension of the present invention.
Fig. 2 A is the enlarged drawing of the improved bearing pre-tightened device part among Fig. 2.
Fig. 3 is the structure chart of C annular oil cavity of the present invention.
Fig. 3 A is the sectional structure chart of C annular oil cavity of the present invention.
Fig. 4 is the structure chart of D annular oil cavity of the present invention.
Fig. 4 A is the sectional structure chart of D annular oil cavity of the present invention.
Fig. 5 is the structure chart of the present invention's second packing ring.
| 1. |
2. |
2A. |
| 3. |
3A. first oil inlet passage | 31. first boss |
| 4.A bearing | 4A. |
4B. |
| 5. |
6. |
7. end cap |
| 8.B bearing | 8A. |
8B. |
| 9. hold-down ring | 11.A |
11A. |
| 11B. |
11C. |
11E. oil-in chamber |
| 12.B |
12A. |
12B. |
| 12C. |
12D. second |
12E. oil-in chamber |
| 13. first sealing ring | 21.C |
21A. |
| 21B. |
21C. |
21E. oil-in chamber |
| 22.D |
22A. the |
22B. the |
| 22C. the |
22D. |
22E. second |
| 22F. the 3rd |
22G. the 4th |
23. the |
| 24. stop up | 25. |
25A. |
| 25B. |
26. second sealing ring | ? |
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
Shown in Fig. 2, Fig. 2 A, a kind of device that is applicable to precision machine tool main shaft bearing pretension of the present invention, this device include main shaft 1, locking nut 2, pad 2A, housing seat 3, end cap 7, hold-down ring 9 and improved bearing pre-tightened device;
Described improved bearing pre-tightened device includes C annular oil cavity 21, D annular oil cavity 22, A bearing 4, B bearing 8, axle sleeve 5, second packing ring 25.
In the present invention, the described improved bearing pre-tightened device annular oil cavity structure that is one-sided thin-walled face deformation.
C annular oil cavity 21
Shown in Fig. 2, Fig. 2 A, Fig. 3, Fig. 3 A, C annular oil cavity 21 is provided with base plate 21A, inner ring body 21B, outer ring body 21C; Oil-in chamber 21E between inner ring body 21B and the outer ring body 21C, this oil-in chamber 21E are used for storage pressure oil; The middle part of C annular oil cavity 21 is through hole 21D, and the column 25B that this through hole 21D is used for second packing ring 25 passes;
The inwall of inner ring body 21B cooperates with the outer wall of the column 25B of second packing ring 25, and the outer wall of inner ring body 21B cooperates with the first boss body 22A of D annular oil cavity 22;
The outer wall of outer ring body 21C cooperates with the inwall of housing seat 3, and the inwall of outer ring body 21C cooperates with the first boss body 22A of D annular oil cavity 22;
For the sealing between the first boss body 22A that realizes C annular oil cavity 21 and D annular oil cavity 22, at the joint of the first boss body 22A of inner ring body 21B, the outer ring body 21C of C annular oil cavity 21 and D annular oil cavity 22 second sealing ring 26 is installed; Second sealing ring 26 places in the groove on the first boss body 22A.
In the present invention, the base plate 21A of C annular oil cavity 21 is thin-wall construction, the pressure oil of introducing from the outside enters in the oil-in chamber 21E of C annular oil cavity 21 along the first oil inlet passage 3A, the 4th oil inlet passage 22G, the second oil inlet passage 22E, the 3rd oil inlet passage 22F, because the base plate 21A of C annular oil cavity 21 is thinner, under the active force of pressure oil, make the micro-strain of thin-walled base plate form B to axial force, described B is applied on the outer ring of A bearing 4 to axial force, thereby realizes the pretension to A bearing 4.The preloaded bearing device of the present invention design can change pretightning force to A bearing 4 by the stool and urine of regulating charge oil pressure, to adapt to the different main rotating speed to the requirement of bearing pre-tightened.
D annular oil cavity 22
Shown in Fig. 2, Fig. 2 A, Fig. 4, Fig. 4 A, D annular oil cavity 22 is provided with the first boss body 22A, the second boss body 22B, the 3rd boss body 22C, linkage section 22D; The center of D annular oil cavity 22 is through hole 22E;
The first boss body 22A is provided with groove, and this groove is used for placing second sealing ring 26; The first boss body 22A is provided with the 3rd oil inlet passage 22F, the 3rd oil inlet passage 22F and the second oil inlet passage 22E conducting; The openend of the first boss body 22A and C annular oil cavity 21 is connected and sealed by second sealing ring 26;
The second boss body 22B is provided with the second oil inlet passage 22E, this second oil inlet passage 22E and the 4th oil inlet passage 22G and the 3rd oil inlet passage 22F conducting; And the openend of the second oil inlet passage 22E and the first oil inlet passage 3A conducting; First boss 31 of the second boss body 22B and housing seat 3 is connected and sealed by the 3rd sealing ring 23;
The joint of the second boss body 22B and the 3rd boss body 22C is combined with the base plate 25A of second packing ring 25;
The joint of the 3rd boss body 22C and linkage section 22D is combined with the outer ring 8B of B bearing 8;
The outer wall of linkage section 22D cooperates with the inwall of housing seat 3.
In the present invention, D annular oil cavity 22 designs for segmental structure, existing circular radial cylinder cooperated again by hold-down ring 9 and compressed from end face D annular oil cavity 22 and being connected of housing seat 3, guarantee the connection reliability between D annular oil cavity 22 and housing seat 3 and the B bearing 8, also guaranteed the locating stiffness of B bearing 8 on main shaft is axial simultaneously.
Referring to Fig. 2, Fig. 2 A, shown in Figure 5, second packing ring 25 is T shape structure, and second packing ring 25 is provided with base plate 25A and column 25B; The center of second packing ring 25 is through hole 25C;
The end face of base plate 25A cooperates with the outer ring 8B of B bearing 8, and the other end of base plate 25A cooperates with the longitudinal terminal surface of the second boss body 22B of D annular oil cavity 22;
The outer wall leading portion of column 25B cooperates with the outer wall of the inner ring body 21B of C annular oil cavity 21, and the outer wall back segment of column 25B cooperates with the axial end of the second boss body 22B of D annular oil cavity 22.
In the present invention, second packing ring 25 has been realized separating between A bearing 4 and the B bearing 8 on the one hand, has realized the tight fit between C annular oil cavity 21 and the D annular oil cavity 22 on the other hand.
In the present invention, improved bearing pre-tightened device one is as the bearing of D annular oil cavity 22 and the oil-feed oil circuit is provided; The 2nd, as the bearing of B bearing 8, and can realize B bearing 8 radially with the main shaft axial location.D annular oil cavity 22 compresses from end face by screw again with the existing circular radial cylinder cooperation of being connected of housing seat 3, has guaranteed connection reliability and main shaft axial location rigidity; Adopt the C annular oil cavity 21 of one-sided thin-walled face deformation, its designs simplification the oil pocket structure, be convenient to oil pocket processing, install and sealing, the more important thing is, this structure makes the cycle surface of A bearing 4 directly contact with the base plate of C annular oil cavity 21, when main shaft 1 be subjected to B to axial force the time, its axial rigidity can not weaken because of the distortion of C annular oil cavity 21.
In the present invention, housing seat 3 is provided with the first oil inlet passage 3A, and this first oil inlet passage 3A and the 4th oil inlet passage 22G(are arranged on the D annular oil cavity 22) conducting.First boss, 31 places of housing seat 3 are used for placing improved bearing pre-tightened device.
In the present invention, main shaft 1 passes end cap 7, hold-down ring 9, B bearing 8, axle sleeve 5, A bearing 4, pad 2A and locking nut 2 in turn from an end to the other end; Improved bearing pre-tightened device is installed between main shaft 1 and the housing seat 3.
Separate by axle sleeve 5, improved bearing pre-tightened device between A bearing 4 and the B bearing 8.
A kind of device that adopts the oil pocket deformation of thin membrane to realize being applicable to precision machine tool main shaft bearing pretension of the present invention's design, the pressure oil of introducing from the outside enters C annular oil cavity 21 along the first oil inlet passage 3A, the base plate 21A of C annular oil cavity 21 is thin-wall construction, the active force of pressure oil is applied to the outer ring 4B of A bearing 4 by the micro-strain of thin-walled, thereby realizes the pretension to A bearing 4.Regulate the big I change of charge oil pressure to the pretightning force of A bearing 4, to adapt to the different main rotating speed to the requirement of bearing pre-tightened.
Claims (2)
1. device that is applicable to precision machine tool main shaft bearing pretension, this device includes main shaft (1), locking nut (2), pad (2A), housing seat (3), end cap (7), hold-down ring (9); It is characterized in that: also include improved bearing pre-tightened device;
Described improved bearing pre-tightened device includes C annular oil cavity (21), D annular oil cavity (22), A bearing (4), B bearing (8), axle sleeve (5), second packing ring (25);
C annular oil cavity (21) is provided with base plate (21A), inner ring body (21B), outer ring body (21C), is oil-in chamber (21E) between inner ring body (21B) and the outer ring body (21C); This oil-in chamber (21E) is used for storage pressure oil;
The inwall of inner ring body (21B) cooperates with the outer wall of the column (25B) of second packing ring (25), and the outer wall of inner ring body (21B) cooperates with the first boss body (22A) of D annular oil cavity (22);
The outer wall of outer ring body (21C) cooperates with the inwall of housing seat (3), and the inwall of outer ring body (21C) cooperates with the first boss body (22A) of D annular oil cavity (22);
D annular oil cavity (22) is provided with the first boss body (22A), the second boss body (22B), the 3rd boss body (22C), linkage section (22D);
The first boss body (22A) is provided with groove, and this groove is used for placing second sealing ring (26); The first boss body (22A) is provided with the 3rd oil inlet passage (22F), the 3rd oil inlet passage (22F) and second oil inlet passage (22E) conducting; The first boss body (22A) is connected and sealed by second sealing ring (26) with the openend of C annular oil cavity (21);
The second boss body (22B) is provided with second oil inlet passage (22E), this second oil inlet passage (22E) and the 4th oil inlet passage (22G) and the 3rd oil inlet passage (22F) conducting; And the openend of second oil inlet passage (22E) and first oil inlet passage (3A) conducting; The second boss body (22B) is connected and sealed by the 3rd sealing ring (23) with first boss (31) of housing seat (3);
Linkage section (22D) is provided with the 4th oil inlet passage (22G), and the end of the 4th oil inlet passage (22G) is equipped with obstruction (24);
The joint of the second boss body (22B) and the 3rd boss body (22C) is combined with the base plate (25A) of second packing ring (25);
The joint of the 3rd boss body (22C) and linkage section (22D) is combined with the outer ring (8B) of B bearing (8);
The outer wall of linkage section (22D) cooperates with the inwall of housing seat (3);
Second packing ring (25) is provided with base plate (25A) and column (25B);
One end face of base plate (25A) cooperates with the outer ring (8B) of B bearing (8), and the other end of base plate (25A) cooperates with the longitudinal terminal surface of the second boss body (22B) of D annular oil cavity (22);
The outer wall leading portion of column (25B) cooperates with the outer wall of the inner ring body (21B) of C annular oil cavity (21), and the outer wall back segment of column (25B) cooperates with the axial end of the second boss body (22B) of D annular oil cavity (22).
2. the device that is applicable to precision machine tool main shaft bearing pretension according to claim 1 is characterized in that: the annular oil cavity structure that described improved bearing pre-tightened device is one-sided thin-walled face deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116861.1A CN103231078B (en) | 2013-04-07 | 2013-04-07 | Device suitable for pre-tightening main shaft bearing of precision machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116861.1A CN103231078B (en) | 2013-04-07 | 2013-04-07 | Device suitable for pre-tightening main shaft bearing of precision machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103231078A true CN103231078A (en) | 2013-08-07 |
| CN103231078B CN103231078B (en) | 2015-01-07 |
Family
ID=48879186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310116861.1A Expired - Fee Related CN103231078B (en) | 2013-04-07 | 2013-04-07 | Device suitable for pre-tightening main shaft bearing of precision machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103231078B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345040A (en) * | 2015-11-17 | 2016-02-24 | 智伯雄 | Device used for vertical lathe and used for pre-tightening main shaft bearing through round nut |
| CN107570732A (en) * | 2017-09-29 | 2018-01-12 | 重庆市普创长顺机械有限公司 | Numerically-controlled machine tool system with automatic part picking function |
| CN113231657A (en) * | 2021-04-19 | 2021-08-10 | 广州市昊志机电股份有限公司 | Main shaft bearing locking structure, electric main shaft and machine tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3613753B2 (en) * | 1999-03-16 | 2005-01-26 | 株式会社ニイガタマシンテクノ | Spindle device and rolling bearing preload method |
| CN201841272U (en) * | 2010-11-05 | 2011-05-25 | 山东普利森集团有限公司 | Heavy-duty lathe spindle bearing nut pretightening structure |
| CN201988726U (en) * | 2011-03-28 | 2011-09-28 | 广州市昊志机电有限公司 | Bearing pre-tightening structure of high-speed electric main shaft |
| JP2012067906A (en) * | 2010-02-16 | 2012-04-05 | Nsk Ltd | Bearing device, main spindle device of machine tool and machine tool |
-
2013
- 2013-04-07 CN CN201310116861.1A patent/CN103231078B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3613753B2 (en) * | 1999-03-16 | 2005-01-26 | 株式会社ニイガタマシンテクノ | Spindle device and rolling bearing preload method |
| JP2012067906A (en) * | 2010-02-16 | 2012-04-05 | Nsk Ltd | Bearing device, main spindle device of machine tool and machine tool |
| CN201841272U (en) * | 2010-11-05 | 2011-05-25 | 山东普利森集团有限公司 | Heavy-duty lathe spindle bearing nut pretightening structure |
| CN201988726U (en) * | 2011-03-28 | 2011-09-28 | 广州市昊志机电有限公司 | Bearing pre-tightening structure of high-speed electric main shaft |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105345040A (en) * | 2015-11-17 | 2016-02-24 | 智伯雄 | Device used for vertical lathe and used for pre-tightening main shaft bearing through round nut |
| CN105345040B (en) * | 2015-11-17 | 2017-05-31 | 智伯雄 | It is a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing |
| CN107570732A (en) * | 2017-09-29 | 2018-01-12 | 重庆市普创长顺机械有限公司 | Numerically-controlled machine tool system with automatic part picking function |
| CN107570732B (en) * | 2017-09-29 | 2024-03-15 | 三明学院 | Numerical control machine tool system with automatic workpiece taking function |
| CN113231657A (en) * | 2021-04-19 | 2021-08-10 | 广州市昊志机电股份有限公司 | Main shaft bearing locking structure, electric main shaft and machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103231078B (en) | 2015-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103223499B (en) | Device capable of improving axial rigidity of main shaft of precision machine tool with adjustable bearing pre-tightening force | |
| WO2009037134A3 (en) | Thrust bearing and suspension for vehicle | |
| CN104165227B (en) | A kind of detachable rotating shaft lip-shaped sealing device | |
| CN103231078B (en) | Device suitable for pre-tightening main shaft bearing of precision machine tool | |
| CN202418245U (en) | Conical air floating shafting | |
| CN104259499A (en) | Automatic-revolving indexing machining device | |
| CN201125961Y (en) | Full seal Raymond machine special bearing | |
| JP6582555B2 (en) | Method for assembling wheel bearing device | |
| CN208185236U (en) | A kind of self-aligning roller bearing structure | |
| CN202811847U (en) | Radial hydrodynamic sliding bearing | |
| CN207454564U (en) | Automobile camshaft is with needle bearing and grinding bearing assembly | |
| CN202291477U (en) | Self-centering locking mandrel | |
| CN102371374B (en) | Special positioning tool for machining oil nozzle workpieces | |
| JP5944186B2 (en) | Bearing device | |
| CN205117988U (en) | Zanjon ball and tapered roller combination bearing | |
| CN204234775U (en) | Hydraulic expanding covering device | |
| CN211398274U (en) | Conical bearing for granulator | |
| CN202291472U (en) | Positioning tool special for machining nozzle workpiece | |
| CN104675853A (en) | Driving axle wheel hub bearing unit | |
| CN207018350U (en) | It is a kind of from pretension four-point contact ball | |
| CN208880221U (en) | A kind of positioning processing device of large size oil sealing | |
| JP2013253681A (en) | Ball bearing | |
| CN208503262U (en) | A kind of thin-walled crossed roller bearing | |
| CN203172348U (en) | Hub assembly for oil lubrication | |
| JP2016205585A (en) | Assembling method of bearing device for wheel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20160407 |