CN204603915U - Ball screw integral bearing mechanism - Google Patents
Ball screw integral bearing mechanism Download PDFInfo
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- CN204603915U CN204603915U CN201520006678.0U CN201520006678U CN204603915U CN 204603915 U CN204603915 U CN 204603915U CN 201520006678 U CN201520006678 U CN 201520006678U CN 204603915 U CN204603915 U CN 204603915U
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- screw mandrel
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Abstract
The utility model discloses a kind of ball screw integral bearing mechanism, comprise, screw mandrel, its end arranges shaft shoulder portion, and described shaft shoulder portion arranges threaded portion; Flange form bearing holder (housing, cover), its inside has step-like through hole, and described step-like through hole is made up of large small sircle hole, and described size circular hole coaxial is arranged; Bearing group, it is made up of the bearing of at least two same models, and described bearing group is arranged in described big hole; Gland, it is disc-shaped structure, and the center of circle has through axial bore, and described gland one end is provided with a columned boss, and described boss is encased in described big hole and with the outer face of described bearing group and fits; Locking nut, the threaded portion Matching installation of itself and described screw mandrel; Wherein, the step surface that the inner face of described bearing group and described size circular hole are formed fits, and the inner face of described locking nut and the outer face of described gland fit.The utility model strengthens bearing touch rigidity and high-precision stable turnability greatly, and positioning precision good stability.
Description
Technical field
The utility model relates to a kind of screw mandrel bracing or strutting arrangement, particularly a kind of ball screw integral bearing mechanism.
Background technology
The mechanical organ that ball wire bar pair is made up of parts such as screw mandrel, nut, balls is the worm drive element of rolling element with ball between screw mandrel and nut.Ball wire bar pair is the actuated element that precision machine tool the most often uses, be the rectilinear motion of nut by the convert rotational motion of screw mandrel, or be the ideal product of the rotary motion of screw mandrel by the transform linear motion of nut, it possesses high accuracy, invertibity and high efficiency feature simultaneously.
The feed system of precision machine tool will obtain high transmission accuracy, and except ball wire bar pair itself will meet except rigidity requirement, the correct installation of ball screw and supporting mechanism also can not look down upon.In existing lathe, the installation fixed form of ball screw generally has four kinds: (1) " fixing-fixing " type, these form two ends are retrained axially and the radial free degree by pair of bearings respectively, load is by two groups of bearing pair shareds, also the bearing pair at two ends can be made to bear reverse prestretching force, thus raising transmission stiffness, be applicable to the occasion of high-speed, high precision; (2) " fixing-travelling " type, this form one end is retrained axially and the radial free degree by pair of bearings, the other end retrains the radial free degree by single bearing, load is born by pair of bearings pair, travelling single bearing can prevent cantilever deflection, and digest the stress produced by thermal change, be applicable to medium speed, high-precision occasion; (3) " supporting-supporting " type, these form two ends arrange a bearing respectively, bear radial load and unidirectional axial force respectively, with the change of load direction, born separately the power of a direction respectively by two bearings, be applicable to the occasion of medium speed, middle precision; (4) " fixing-freely " type, this form one end is retrained axially and the radial free degree by pair of bearings, the unsettled one-tenth free state of the other end, load is born by with a pair bearing pair, and the moment of flexure that screw mandrel revolution centrifugal force causes need be overcome, be applicable to the slow-speed of revolution, middle precision, the occasion that axial length is short.The utility model is set forth mainly for " fixing-fixing " type mounting means.
The integral rigidity adopting the ball wire bar pair of " fixing-fixing " type mounting means is mainly by elements affect such as screw mandrel self-stiffness, bearing rigidity, bearing clearance, play between bearing and bearing holder (housing, cover).Because screw mandrel self-stiffness, bearing rigidity are fixing immutable, so only have by eliminate or reduce bearing clearance, integral rigidity that between bearing and bearing holder (housing, cover), the mode of play improves ball wire bar pair, just depend on the applying mode of bearing pre-fastening after all.
The ball screw spring bearing assembling of each kinematic axis of current domestic Digit Control Machine Tool is all carry out at erecting yard, because bearing clearance adjustment is improper, bearing is bearing outer ring end face and bearing holder (housing, cover) end face when loading bearing holder (housing, cover), bearing inner race end face and ball screw pillow block terrace easily produce gap, the dimensional accuracy of gland end face, positional precision is poor, thus in each axle motion of lathe, easily heating is produced, axle play, cause ball screw running accuracy, rigidity, anti-trembling vibration cutting ability reduces, temperature rise and thermal deformation strengthen, and then have influence on the precision of processing parts, surface quality etc.
Utility model content
For the weak point existed in above-mentioned technology, the purpose of this utility model is to provide a kind of ball screw integral bearing mechanism, it can by setting suitable axial pre tightening force to eliminate or reducing bearing clearance, bearing outer ring end face and bearing holder (housing, cover) end clearance, bearing inner race end face and ball screw pillow block terrace gap, thus ball wire bar pair can keep duty relatively stably in different operating modes.
In order to realize, according to these objects of the present utility model and other advantages, providing a kind of ball screw integral bearing mechanism, comprising:
Screw mandrel, it is cylinder rod-like structure, and the end of described screw mandrel arranges shaft shoulder portion, and described shaft shoulder portion arranges threaded portion;
Flange form bearing holder (housing, cover), it is the combining structure of cylinder and ring flange, described flange form bearing holder (housing, cover) inside has step-like through hole, described step-like through hole is made up of small one and large one circular hole, described size circular hole coaxial is communicated with setting, described big hole is opened at ring flange end face, and described small sircle hole is opened at cylinder end face;
Bearing group, it is made up of the bearing of at least two same models, and described bearing group is arranged in described big hole;
Gland, it is disc-shaped structure, and the center of circle has through axial bore, and described gland one end is provided with a columned boss, and described boss is encased in described big hole and with the outer face of described bearing group and fits;
Locking nut, the threaded portion Matching installation of itself and described screw mandrel;
Wherein, the step surface that the inner face of described bearing group and described size circular hole are formed fits, described screw mandrel end is successively through described small sircle hole, described bearing group and described gland, the described shaft shoulder stretches out the end face of described bearing holder (housing, cover) ring flange, and the inner face of described locking nut and the outer face of described gland fit.
Adopt the supporting mechanism of said structure, set the size of the screw mandrel axial force on effect and gland by adjustment clamp nut in the position of screw axis shoulder, thus axial pre tightening force and the screw mandrel prestretching force of bearing can be adjusted under different operating modes.
As further improvement of the utility model, inner spacing collar and the outer separator of annulus column structure can be provided with, described spacer external diameter is slightly less than described small sircle hole radius, and internal diameter is identical with described screw axis shoulder radii, described inner spacing collar is installed between described small sircle hole and the described screw mandrel shaft shoulder, and described outer separator is installed between described gland and the described screw mandrel shaft shoulder.Adopt spacer device can be conducive to the installation of each assembly and the applying of axial pre tightening force.
Further improve as of the present utility model, can be provided with inner seal ring and the exterior seal ring of circular ring, described inner seal ring is arranged on described inner spacing collar, and described exterior seal ring is arranged on described outer separator.Sealing ring can prevent water or dust in work for a long time from entering in bearing.
Preferably, the utility model also comprises lathe holder, flange form bearing holder (housing, cover) is provided with some A type bolts hole, flange form bearing holder (housing, cover) is installed fixing by A type bolt and described lathe holder, gland is provided with some Type B bolts hole, and gland is installed fixing by Type B bolt and described flange form bearing holder (housing, cover).
Compared with prior art, its beneficial effect is the utility model:
Set the size of the screw mandrel axial force on effect and gland in the position of screw axis shoulder by adjustment clamp nut, thus axial pre tightening force and the screw mandrel prestretching force of bearing can be adjusted under different operating modes, eliminate or reduce bearing clearance, bearing outer ring end face and bearing holder (housing, cover) end clearance, bearing inner race end face and ball screw pillow block terrace gap, thus ball wire bar pair can keep duty relatively stably in different operating modes;
The motion artifacts of its backlass, screw rod vibration, ball wire bar pair obviously reduces;
The machining accuracy of lathe and being improved the service life of ball wire bar pair;
While the identical working life of maintenance, bearing can bear higher load.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model ball screw integral bearing mechanism.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail, can implements according to this with reference to description word to make those skilled in the art.
Should be appreciated that used hereinly such as " to have ", other elements one or more do not allotted in " comprising " and " comprising " term or the existence of its combination or interpolation.
Fig. 1 shows according to a kind of way of realization of the present utility model, comprising:
Screw mandrel 5, it is cylinder rod-like structure, and the end of described screw mandrel 5 arranges shaft shoulder portion, and described shaft shoulder portion arranges threaded portion;
Flange form bearing holder (housing, cover) 1, it is the combining structure of cylinder and ring flange, described flange form bearing holder (housing, cover) 1 inside has step-like through hole, described step-like through hole is made up of small one and large one circular hole, described size circular hole coaxial is communicated with setting, described big hole is opened at ring flange end face, and described small sircle hole is opened at cylinder end face;
Bearing group 2, it is made up of the bearing of at least two same models, and described bearing group 2 is arranged in described big hole;
Gland 3, it is disc-shaped structure, and the center of circle has through axial bore, and described gland 3 one end is provided with a columned boss, and described boss to be encased in described big hole and to fit with the outer face of described bearing group 2;
Locking nut 4, the threaded portion Matching installation of itself and described screw mandrel;
Wherein, the step surface that the inner face of described bearing group 2 and described size circular hole are formed fits, described screw mandrel end is successively through described small sircle hole, described bearing group 2 and described gland 3, the described shaft shoulder stretches out the end face of described flange form bearing holder (housing, cover) 1 ring flange, and the inner face of described locking nut 4 and the outer face of described gland 3 fit.
During use, set the size of the screw mandrel axial force on effect and gland 3 by adjustment clamp nut 4 in the position of screw axis shoulder, thus axial pre tightening force and the screw mandrel prestretching force of bearing can be adjusted under different operating modes.
In the utility model, inner spacing collar 32 and the outer separator 31 of annulus column structure can be set, described spacer external diameter is slightly less than described small sircle hole radius, and internal diameter is identical with described screw axis shoulder radii, described inner spacing collar 32 is installed between described small sircle hole and the described screw mandrel shaft shoulder, and described outer separator 31 is installed between described gland and the described screw mandrel shaft shoulder.Adopt spacer device can be conducive to the installation of each assembly and the applying of axial pre tightening force.
In the utility model, can also arrange inner seal ring 34 and the exterior seal ring 33 of circular ring, described inner seal ring is arranged on described inner spacing collar 32, and described exterior seal ring is arranged on described outer separator 31.Sealing ring can prevent water or dust in work for a long time from entering in bearing.
The utility model also comprises lathe holder 6, flange form bearing holder (housing, cover) 1 is provided with some A type bolts hole 10, flange form bearing holder (housing, cover) is installed fixing by A type bolt and lathe holder 6, gland 3 is provided with some Type B bolts hole 30, and gland 3 is installed fixing by Type B bolt and flange form bearing holder (housing, cover) 1.
Operation principle: integral bearing mechanism is arranged on lathe holder 6, load onto ball wire bar pair, with A type bolt tightening integral bearing mechanism, with slide block, test rod, amesdial, ball wire bar pair is corrected, guarantee that ball wire bar pair that amesdial the shows depth of parallelism at vertical-horizontal both direction and machine tool guideway is in 0.01 millimeter, tightens ball screw integral bearing mechanism according to the pretightning force locking nut 4 calculated.
Although embodiment of the present utility model is open as above, but it is not limited in listed in description and embodiment utilization, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the utility model is not limited to specific details and illustrates here and the legend described.
Claims (6)
1. a ball screw integral bearing mechanism, is characterized in that, comprising:
Screw mandrel, it is cylinder rod-like structure, and the end of described screw mandrel arranges shaft shoulder portion, and described shaft shoulder portion arranges threaded portion;
Flange form bearing holder (housing, cover), it is the combining structure of cylinder and ring flange, described flange form bearing holder (housing, cover) inside has step-like through hole, described step-like through hole is made up of small one and large one circular hole, described size circular hole coaxial is communicated with setting, described big hole is opened at ring flange end face, and described small sircle hole is opened at cylinder end face;
Bearing group, it is made up of the bearing of at least two same models, and described bearing group is arranged in described big hole;
Gland, it is disc-shaped structure, and the center of circle has through axial bore, and described gland one end is provided with a columned boss, and described boss is encased in described big hole and with the outer face of described bearing group and fits;
Locking nut, the threaded portion Matching installation of itself and described screw mandrel;
Wherein, the step surface that the inner face of described bearing group and described size circular hole are formed fits, described screw mandrel end is successively through described small sircle hole, described bearing group and described gland, the described shaft shoulder stretches out the end face of described bearing holder (housing, cover) ring flange, and the inner face of described locking nut and the outer face of described gland fit.
2. ball screw integral bearing mechanism as claimed in claim 1, it is characterized in that, comprise inner spacing collar and the outer separator of annulus column structure, described spacer external diameter is slightly less than described small sircle hole radius, and internal diameter is identical with described screw axis shoulder radii, described inner spacing collar is installed between described small sircle hole and the described screw mandrel shaft shoulder, and described outer separator is installed between described gland and the described screw mandrel shaft shoulder.
3. ball screw integral bearing mechanism as claimed in claim 2, it is characterized in that, comprise inner seal ring and the exterior seal ring of circular ring, described inner seal ring is arranged on described inner spacing collar, and described exterior seal ring is arranged on described outer separator.
4. ball screw integral bearing mechanism as claimed in claim 1, it is characterized in that, described flange form bearing holder (housing, cover) is provided with some A type bolts hole.
5. ball screw integral bearing mechanism as claimed in claim 4, is characterized in that, comprise lathe holder, and described flange form bearing holder (housing, cover) is installed fixing by A type bolt and described lathe holder.
6. ball screw integral bearing mechanism as claimed in claim 5, it is characterized in that, described gland is provided with some Type B bolts hole, and described gland is installed fixing by Type B bolt and described flange form bearing holder (housing, cover).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006678.0U CN204603915U (en) | 2015-01-06 | 2015-01-06 | Ball screw integral bearing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520006678.0U CN204603915U (en) | 2015-01-06 | 2015-01-06 | Ball screw integral bearing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204603915U true CN204603915U (en) | 2015-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520006678.0U Active CN204603915U (en) | 2015-01-06 | 2015-01-06 | Ball screw integral bearing mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN204603915U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589126A (en) * | 2015-01-06 | 2015-05-06 | 江苏元利爱威亚精密机床有限公司 | Integral bearing mechanism for ball screw |
| CN107747597A (en) * | 2017-08-25 | 2018-03-02 | 北京精密机电控制设备研究所 | The special switching of 10 tonnes of planetary roller screw load tests of one kind and fixing device |
-
2015
- 2015-01-06 CN CN201520006678.0U patent/CN204603915U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589126A (en) * | 2015-01-06 | 2015-05-06 | 江苏元利爱威亚精密机床有限公司 | Integral bearing mechanism for ball screw |
| CN107747597A (en) * | 2017-08-25 | 2018-03-02 | 北京精密机电控制设备研究所 | The special switching of 10 tonnes of planetary roller screw load tests of one kind and fixing device |
| CN107747597B (en) * | 2017-08-25 | 2019-08-09 | 北京精密机电控制设备研究所 | A kind of dedicated switching of 10 tonnes of planetary roller screw load tests and fixed device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160615 Address after: 210000, No. 1, Purple East Road, Qixia District, Jiangsu, Nanjing Patentee after: JIANGSU YUANLI CNC MACHINE TOOL CO., LTD. Address before: 210048 Jiangsu province Nanjing city Liuhe District of Nanjing City, Zhongshan science and technology park by the road No. 9 building C17 Patentee before: JIANGSU YUANLI AVIA PRECISION MACHINE TOOL CO., LTD. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20190715 Address after: 210000 C17 Building, No. 9 Kechuang Avenue, Zhongshan Science Park, Liuhe District, Nanjing City, Jiangsu Province Patentee after: JIANGSU YUANLI AVIA PRECISION MACHINE TOOL CO., LTD. Address before: 210000, No. 1, Purple East Road, Qixia District, Jiangsu, Nanjing Patentee before: JIANGSU YUANLI CNC MACHINE TOOL CO., LTD. |
|
| TR01 | Transfer of patent right |