CN206544022U - A kind of machine ram pivot structure - Google Patents
A kind of machine ram pivot structure Download PDFInfo
- Publication number
- CN206544022U CN206544022U CN201720243959.7U CN201720243959U CN206544022U CN 206544022 U CN206544022 U CN 206544022U CN 201720243959 U CN201720243959 U CN 201720243959U CN 206544022 U CN206544022 U CN 206544022U
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- bearing
- shaft end
- end nut
- roller bearing
- bushing
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Abstract
The utility model is related to metal cutting process machine tool field, specifically a kind of machine ram pivot structure, including the combination of central shaft, cylinder roller bearing, angular contact ball bearing, bushing, the first spacer, the second spacer, the first shaft end nut, the second shaft end nut and gland.The beneficial effects of the utility model are：Bearing axial clearance is eliminated using shaft end nut pretightning force, radial clearance is eliminated using the cone match of axle and bearing inner race, compared with traditional sliding bearing or radial ball bearing formula structure, this structure can effectively eliminate the gap between axle and axis hole, the clearance of bearing in itself is reduced, the running accuracy of pivot is improved.
Description
Technical field
The utility model is related to metal cutting process machine tool field, specifically a kind of machine ram pivot structure.
Background technology
When lathe works, slide unit is slided up and down in machine pillar, and ram can be swung around rotating centre component with respect to slide unit
Certain angle, traditional rotating centre component use sliding bearing or radial ball bearing formula structure, between axis hole and axle between
Clearance between gap and bearing is difficult to eliminate, so as to influence ram running accuracy.
Utility model content
In order to overcome the deficiencies in the prior art, technical problem to be solved in the utility model is that providing a kind of lathe slides
Pivot structure is rested the head on, bearing axial clearance is eliminated using shaft end nut pretightning force, utilizes the cone match of axle and bearing inner race
Eliminate radial clearance.
In order to solve the above technical problems, the technical scheme that a kind of machine ram pivot structure of the utility model is used
It is：
A kind of machine ram pivot structure, including the combination of central shaft, cylinder roller bearing, angular contact ball bearing,
Bushing, the first spacer, the second spacer, the first shaft end nut, the second shaft end nut and gland, the central axis are passed through and are attached to
Slide unit and ram together, ram are fixedly connected with central shaft, and slide unit is provided with bearing hole；The cylinder roller bearing, bushing,
First shaft end nut is sequentially sleeved on central shaft from the inside to the outside, and the first shaft end nut is connected with central axle threads, cylindrical roller axle
The inner ring and the contact surface of central shaft held is the conical surface, and the taper end of the conical surface is towards bushing, and the inner ring of cylinder roller bearing passes through bushing
Connect with the first shaft end nut, the outer ring of cylinder roller bearing connects with step in bearing hole；The angular contact ball bearing group
Close, the first spacer and the second shaft end nut are sequentially sleeved on bushing from the inside to the outside, the second shaft end nut is connected with bush threads, to
The outer ring of heart thrust ball bearing combination is connected by the second spacer with the outer ring of cylinder roller bearing, angular contact ball bearing combination
Inner ring connected by the first spacer with the second shaft end nut, the gland is fixedly connected on the port of bearing hole and inwardly compressed
The outer ring of angular contact ball bearing combination.
Preferably, the cylinder roller bearing is Biserial cylindrical roller bearing.
Preferably, the taper of the conical surface is 1:12.
Preferably, the gland also installs oil sealing between being combined with the angular contact ball bearing.
Preferably, the central shaft is provided with collar, and the ram is fixed by screws in collar.
A kind of beneficial effect of machine ram pivot structure of the utility model is：With traditional sliding bearing or centripetal
Ball bearing type structure is compared, and this structure can effectively eliminate the gap between axle and axis hole, is reduced the clearance of bearing in itself, is improved rotation
Turn the running accuracy at center.
The effect of design of the present utility model, concrete structure and generation is described further below with reference to accompanying drawing, with
It is completely understood by the purpose of this utility model, feature and effect.
Brief description of the drawings
Fig. 1 be in the utility model embodiment ram with respect to the structural representation that slide unit is swung；
Fig. 2 is a kind of cross-sectional view of machine ram pivot structure in the utility model embodiment；
Wherein：The shaft end nuts of 1- first, the shaft end nuts of 2- second, 3- bushings, the spacers of 4- first, 5- angular contact ball bearings
Combination, 6- cylinder roller bearings, 7- central shafts, the 701- conical surfaces, 702- collars, 8- glands, 9- oil sealings, the spacers of 10- second, 11-
Slide unit, 12- rams, 13- machine pillars.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that saying that the specific embodiment of description is used only for explaining herein
The utility model, is not used to limit the utility model.
It should be noted that the term "left", "right", " interior ", " outer " and similar statement used in text are used only to
The utility model is explained, is not used to limit the utility model.
As shown in figure 1, slide unit 11 is slided up and down in machine pillar 13, ram 12 can revolve around the utility model machine ram
Turn division center and certain angle is swung with respect to slide unit 11.
As shown in Fig. 2 a kind of machine ram pivot structure, including central shaft 7, cylinder roller bearing 6, centripetal thrust force
Ball bearing combination 5, bushing 3, the first spacer 4, the second spacer 10, the first shaft end nut 1, the second shaft end nut 2 and gland 8, institute
State central shaft 7 and pass perpendicularly through the slide unit 11 and ram 12 sticked together, ram 12 is fixedly connected with central shaft 7, set on slide unit 11
There is bearing hole；The cylinder roller bearing 6, bushing 3, the first shaft end nut 1 are sequentially sleeved on central shaft 7 from the inside to the outside, and first
Shaft end nut 1 is threadedly coupled with central shaft 7, and the inner ring of cylinder roller bearing 6 is the conical surface 701, the conical surface with the contact surface of central shaft 7
701 taper end is connected towards bushing 3, the inner ring of cylinder roller bearing 6 by bushing 3 with the first shaft end nut 1, cylindrical roller axle
The outer ring for holding 6 connects with step in bearing hole；The angular contact ball bearing combines the 5, first spacer 4 and the second shaft end nut 2
It is sequentially sleeved in from the inside to the outside on bushing 3, the second shaft end nut 2 is threadedly coupled with bushing 3, outside angular contact ball bearing combination 5
Circle connect by the second spacer 10 with the outer ring of cylinder roller bearing 6, angular contact ball bearing combine 5 inner ring by first every
Set 4 connects with the second shaft end nut 2, and the gland 8 is fixedly connected on the port of bearing hole and inwardly compresses angular contact ball bearing
Hold the outer ring of combination 5.
When tightening the first shaft end nut 1, the first shaft end nut 1 extrudes to the right bushing 3, so that bushing 3 is rolled to cylinder
Sub- bearing 6 is extruded, so that the effect for the inner ring axial gap for eliminating cylinder roller bearing 6 is reached, in addition, cylinder roller bearing 6
The contact surface of inner ring and central shaft 7 be the conical surface 701, so as to reach the effect for eliminating the radial clearance of cylinder roller bearing 6.
When tightening the second shaft end nut 2, an axial thrust to the right is produced, so that the first spacer of precompressed to the right 4, axle
The inner ring of angular contact ball bearing combination 5 is delivered to by the first spacer 4 to thrust, axial thrust is transmitted by angular contact ball
5 outer ring is combined to angular contact ball bearing, then slide unit 11 is transferred to by the outer ring of the second spacer 10, cylinder roller bearing 6
Bearing hole on step, so as to reach the outer ring end-play for eliminating angular contact ball bearing combination 5 and cylinder roller bearing 6
Effect, and tighten the second shaft end nut 2 while an axial reaction force to the left can be produced to bushing 3 and central shaft 7, from
And ram 12 is close to slide unit 11 and rotate.
Preferably, the cylinder roller bearing 6 is Biserial cylindrical roller bearing.
Preferably, the taper of the conical surface 701 is 1:12.
Preferably, the gland 8 also installs oil sealing 9 between combining 5 with the angular contact ball bearing, and oil sealing 9 is arranged on
Inside gland 8, prevent dust from entering bearing hole.
Preferably, the central shaft 7 is provided with collar 702, and the ram 12 is fixed by screws in collar 702.
Preferred embodiment of the present utility model is given in accompanying drawing.But, the utility model can be with many different shapes
Formula is realized, however it is not limited to embodiment described by this specification.On the contrary, the purpose for providing these embodiments is made to this reality
It is more thorough comprehensive with the understanding of new disclosure.
Claims (5)
1. a kind of machine ram pivot structure, it is characterised in that including central shaft, cylinder roller bearing, centripetal thrust force ball
Bearing combination, bushing, the first spacer, the second spacer, the first shaft end nut, the second shaft end nut and gland, the central shaft hang down
Direct puncture crosses the slide unit and ram sticked together, and ram is fixedly connected with central shaft, and slide unit is provided with bearing hole；The cylindrical roller
Bearing, bushing, the first shaft end nut are sequentially sleeved on central shaft from the inside to the outside, and the first shaft end nut is connected with central axle threads,
The inner ring of cylinder roller bearing and the contact surface of central shaft are the conical surface, the taper end of the conical surface towards bushing, cylinder roller bearing it is interior
Circle is connected by bushing with the first shaft end nut, and the outer ring of cylinder roller bearing connects with step in bearing hole；It is described centripetal to push away
The combination of power ball bearing, the first spacer and the second shaft end nut are sequentially sleeved on bushing from the inside to the outside, the second shaft end nut and bushing
Threaded connection, the outer ring of angular contact ball bearing combination is connected by the second spacer with the outer ring of cylinder roller bearing, centripetal to push away
The inner ring of power ball bearing combination is connected by the first spacer with the second shaft end nut, and the gland is fixedly connected on the end of bearing hole
Mouth and the outer ring for inwardly compressing angular contact ball bearing combination.
2. machine ram pivot structure according to claim 1, it is characterised in that the cylinder roller bearing is double
Line column roller bearing.
3. machine ram pivot structure according to claim 1, it is characterised in that the taper of the conical surface is 1:
12。
4. machine ram pivot structure according to claim 1, it is characterised in that the gland centripetal is pushed away with described
Oil sealing is also installed between the combination of power ball bearing.
5. machine ram pivot structure according to claim 1, it is characterised in that the central shaft is provided with axle
Ring, the ram is fixed by screws in collar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720243959.7U CN206544022U (en) | 2017-03-14 | 2017-03-14 | A kind of machine ram pivot structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720243959.7U CN206544022U (en) | 2017-03-14 | 2017-03-14 | A kind of machine ram pivot structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206544022U true CN206544022U (en) | 2017-10-10 |
Family
ID=59995214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720243959.7U Active CN206544022U (en) | 2017-03-14 | 2017-03-14 | A kind of machine ram pivot structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206544022U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108356545A (en) * | 2018-04-18 | 2018-08-03 | 环球工业机械（东莞）有限公司 | Ram anti-dumping reversed structure |
| CN108436466A (en) * | 2018-04-18 | 2018-08-24 | 环球工业机械（东莞）有限公司 | Bore milling compounding machine bed |
| CN108453519A (en) * | 2018-04-03 | 2018-08-28 | 环球工业机械（东莞）有限公司 | A kind of static pressure rotary worktable precision centering device preventing tilting |
-
2017
- 2017-03-14 CN CN201720243959.7U patent/CN206544022U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108453519A (en) * | 2018-04-03 | 2018-08-28 | 环球工业机械（东莞）有限公司 | A kind of static pressure rotary worktable precision centering device preventing tilting |
| CN108356545A (en) * | 2018-04-18 | 2018-08-03 | 环球工业机械（东莞）有限公司 | Ram anti-dumping reversed structure |
| CN108436466A (en) * | 2018-04-18 | 2018-08-24 | 环球工业机械（东莞）有限公司 | Bore milling compounding machine bed |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A structure of machine tool ram rotation center Effective date of registration: 20201224 Granted publication date: 20171010 Pledgee: China Co. truction Bank Corp Dongguan branch Pledgor: Global industrial machinery (Dongguan) Co.,Ltd. Registration number: Y2020980009933 |