CN203197664U - Axial protection device for bearing of ball screw - Google Patents

Axial protection device for bearing of ball screw Download PDF

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Publication number
CN203197664U
CN203197664U CN 201320025936 CN201320025936U CN203197664U CN 203197664 U CN203197664 U CN 203197664U CN 201320025936 CN201320025936 CN 201320025936 CN 201320025936 U CN201320025936 U CN 201320025936U CN 203197664 U CN203197664 U CN 203197664U
Authority
CN
China
Prior art keywords
bearing
ball screw
cover
sleeve
housing
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.)
Expired - Fee Related
Application number
CN 201320025936
Other languages
Chinese (zh)
Inventor
丁龙跃
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YUNNAN ZHONGJI INDUSTRY Co Ltd
Original Assignee
YUNNAN ZHONGJI INDUSTRY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by YUNNAN ZHONGJI INDUSTRY Co Ltd filed Critical YUNNAN ZHONGJI INDUSTRY Co Ltd
Priority to CN 201320025936 priority Critical patent/CN203197664U/en
Application granted granted Critical
Publication of CN203197664U publication Critical patent/CN203197664U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an axial protection device for a bearing of a ball screw. The axial protection device comprises a bearing block, a fixing cover and a bearing sleeve. The fixing cover and the bearing sleeve are arranged successively in the bearing block and are in stationary fit, the inner wall of the bearing sleeve is in tight fit with the bearing, and a protection ring sleeve is arranged on the inner wall of the bearing sleeve and on the inner side of the bearing. According to the axial protection device, the protection ring sleeve in a composite structure is used, so that unbalanced stress which might be produced during assembly can be effective absorbed, and the bearing can be kept in a good working state. During assembly of the ball screw, a pre-stretching nut is rotated to drive the bearing sleeve to move outwards, and force is applied to a pre-stretching outer taper sleeve by the bearing sleeve, transmitted to an inner taper sleeve body of the protection ring sleeve and applied to the ball screw eventually, accordingly, the bearing cannot be affected by the stretching force, and damage to the bearing is prevented. By means of the axial protection device, the problem that the accuracy is reduced caused by thermal expansion of the ball screw due to temperature rising during machining is solved, and drooping and chattering of the ball screw due to self weight are relieved.

Description

A kind of ball screw bearing shaft is to protective device
Technical field
The utility model belongs to the machine tool technical field, is specifically related to a kind of simple in structurely, and simple installation can reduce screw mandrel thermal deformation and the error that causes of tenesmus, has avoided the ball screw bearing shaft of damage of bearings to protective device.
Background technology
Prior art ball screw bearing shaft mainly is to prevent that dust, silt etc. from invading the baffle type protection in the bearing to protective device, and the duty to the ball screw bearing does not play real effectively protective effect.Therefore, when ball screw is installed, the event of damage of bearings usually takes place, because the pretightning force that produces when ball screw is installed is by countershaft bearing bearing, bearing bears great prestretching force, and this power is to apply in addition outside the pretightning force of bearing, and is excessive as prestretching force, then bearing heating surpasses normal level, thereby causes damage of bearings.For this reason, develop a kind of simple in structurely, simple installation can reduce screw mandrel thermal deformation and the error that causes of tenesmus, has avoided the ball screw bearing shaft of damage of bearings to protective device, effectively protection is provided really for the ball screw bearing.
The utility model content
It is a kind of simple in structure that the purpose of this utility model is to provide, and simple installation can reduce the error that screw mandrel thermal deformation and tenesmus cause, has avoided the ball screw bearing shaft of damage of bearings to protective device.
The purpose of this utility model realizes like this; comprise bearing block, fixed cap and bearing holder (housing, cover); set gradually fixed cap and bearing holder (housing, cover) in the described bearing block; described fixed cap and bearing holder (housing, cover) stationary fit; described bearing holder (housing, cover) inwall and bearing tight fit, side arranges the protection ring set within the described bearing holder (housing, cover) inwall bearing.
The utility model adopts the protection ring set of composite construction, and issuable unbalanced stress in the time of can effectively absorbing assembling makes the bearing good working order.During the assembling ball screw, rotate the prestretched nut and drive bearing holder (housing, cover) and move outward, bearing holder (housing, cover) is applied to the prestretched external conical sleeve to power; then arrive on the inner conical drogue of protection ring set; finally be applied directly on the ball screw, so tensile force can not impact bearing, avoided damage of bearings.Utility model is simple in structure, and working stability is reliable, has solved in the processing because ball screw temperature rising thermal expansion causes the precise decreasing problem, has alleviated the sagging and chatter that ball screw produces because of deadweight.
Description of drawings
Fig. 1 partly cuts open schematic diagram for the utility model overall structure;
Among the figure: 1-ball screw, 2-bearing, 3-bearing block, 4-fixed cap, 5-bearing holder (housing, cover), 6-prestretched nut, 7-spacer, 8-lock-screw, cover in the 9-overcoat, 10-.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing, but never in any form the utility model is limited, and any conversion based on the utility model training centre is done all falls into the utility model protection domain.
As shown in Figure 1; the utility model comprises bearing block 3, fixed cap 4 and bearing holder (housing, cover) 5; set gradually fixed cap 4 and bearing holder (housing, cover) 5 in the described bearing block 3; described fixed cap 4 and bearing holder (housing, cover) 5 stationary fits; described bearing holder (housing, cover) 5 inwalls and bearing 2 tight fits, side arranges the protection ring set within the described bearing holder (housing, cover) 5 inwall bearings 2.
Side arranges cannelure within the described bearing holder (housing, cover) 5 inwall bearings 2, described cannelure and the stationary fit of protection ring set.
Described protection ring set comprises overcoat 9 and interior cover 10, described overcoat 9 and interior cover 10 stationary fits.
Described overcoat 9 is coadapted taper with the mating surface of interior cover 10.
Described overcoat 9 is 0 ~ 3 ° with the tapering of the mating surface of interior cover 10.
The arranged outside spacer 7 of described bearing 2.
Described overcoat 9 is total accepted way of doing sth fit structure with interior cover 10.
Described overcoat 9 and bearing holder (housing, cover) 5 tight fits.
Described bearing holder (housing, cover) 5 outer rims arrange screw thread and cooperate with 6 work of prestretched nut.
Described ball screw 1 tail end arranges lock-screw 8, cooperates with ball screw 1 locking.
Operation principle of the present utility model and the course of work:
The utility model adopts the protection ring set of composite construction, and issuable unbalanced stress in the time of can effectively absorbing assembling makes the bearing good working order.An end is fixed when having taken full advantage of the ball screw bearing and installing, and the other end this mode of moving about, bearing outer ring moves about, and has reduced the error that screw mandrel thermal deformation and tenesmus cause, simultaneously the damage of bearings of also having avoided conventional prestretched to cause.During the assembling ball screw, rotate the prestretched nut and drive bearing holder (housing, cover) and move outward, bearing holder (housing, cover) is applied to the prestretched external conical sleeve to power, then power arrives on the prestretched inner conical drogue, final this power will be applied directly on the ball screw, so tensile force can not impact bearing, avoid damage of bearings.

Claims (10)

1. a ball screw bearing shaft is to protective device; comprise bearing block (3); fixed cap (4) and bearing holder (housing, cover) (5); set gradually fixed cap (4) and bearing holder (housing, cover) (5) in the described bearing block (3); described fixed cap (4) and bearing holder (housing, cover) (5) stationary fit; described bearing holder (housing, cover) (5) inwall and bearing (2) tight fit, side arranges the protection ring set within described bearing holder (housing, cover) (5) the inwall bearing (2).
2. ball screw bearing shaft according to claim 1 is characterized in that to protective device side arranges cannelure within described bearing holder (housing, cover) (5) the inwall bearing (2), described cannelure and the stationary fit of protection ring set.
3. ball screw bearing shaft according to claim 1 is characterized in that to protective device described protection ring set comprises overcoat (9) and interior cover (10), described overcoat (9) and interior cover (10) stationary fit.
4. ball screw bearing shaft according to claim 3 is characterized in that to protective device described overcoat (9) and the mating surface of interior cover (10) are coadapted taper.
5. ball screw bearing shaft according to claim 4 is characterized in that to protective device described overcoat (9) and the tapering of the mating surface of interior cover (10) are 0 ~ 3 °.
6. ball screw bearing shaft according to claim 1 is characterized in that the arranged outside spacer (7) of described bearing (2) to protective device.
7. ball screw bearing shaft according to claim 3 is characterized in that to protective device described overcoat (9) and interior cover (10) are total accepted way of doing sth fit structure.
8. ball screw bearing shaft according to claim 3 is characterized in that described overcoat (9) and bearing holder (housing, cover) (5) tight fit to protective device.
9. ball screw bearing shaft according to claim 1 is characterized in that to protective device described bearing holder (housing, cover) (5) outer rim arranges screw thread and cooperates with prestretched nut (6) work.
10. ball screw bearing shaft according to claim 1 is characterized in that to protective device described ball screw (1) tail end arranges lock-screw (8), cooperates with ball screw (1) locking.
CN 201320025936 2013-01-18 2013-01-18 Axial protection device for bearing of ball screw Expired - Fee Related CN203197664U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320025936 CN203197664U (en) 2013-01-18 2013-01-18 Axial protection device for bearing of ball screw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320025936 CN203197664U (en) 2013-01-18 2013-01-18 Axial protection device for bearing of ball screw

Publications (1)

Publication Number Publication Date
CN203197664U true CN203197664U (en) 2013-09-18

Family

ID=49141803

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320025936 Expired - Fee Related CN203197664U (en) 2013-01-18 2013-01-18 Axial protection device for bearing of ball screw

Country Status (1)

Country Link
CN (1) CN203197664U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103692273A (en) * 2013-12-10 2014-04-02 江门市奥斯龙机械有限公司 Rotating mechanism of machining center

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103692273A (en) * 2013-12-10 2014-04-02 江门市奥斯龙机械有限公司 Rotating mechanism of machining center

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130918

Termination date: 20170118

CF01 Termination of patent right due to non-payment of annual fee