CN204277386U - Bearing hold down gag - Google Patents
Bearing hold down gag Download PDFInfo
- Publication number
- CN204277386U CN204277386U CN201420715014.7U CN201420715014U CN204277386U CN 204277386 U CN204277386 U CN 204277386U CN 201420715014 U CN201420715014 U CN 201420715014U CN 204277386 U CN204277386 U CN 204277386U
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- CN
- China
- Prior art keywords
- bearing
- dwang
- load nut
- diameter
- hold down
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- 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
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Abstract
The utility model discloses a kind of bearing hold down gag.The utility model overcomes existing installation bearing and adopts copper rod shock to there is the deficiency of hitting and splitting bearing or dress angle pedestal bearing, provides a kind of bearing hold down gag, comprises dwang and pre-load nut; Dwang comprise connect successively from left to right clamping part, the shaft shoulder, axle journal and threaded portion, shaft shoulder external diameter is less than bearing outside diameter to be installed, and axle journal coordinates with bearing clearance to be installed, and threaded portion diameter is less than journal diameter; Described pre-load nut is threaded with dwang.The utility model is simple and practical, low cost of manufacture.
Description
Technical field
The utility model belongs to bearing hold down gag field, is specifically related to a kind of bearing hold down gag.
Background technology
The quality that bearing is installed whether, will have influence on the precision of bearing, life-span and performance.Usually clean bearing and correlated parts at installation shaft brought forward, the bearing for grease lubrication and the bearing with oil sealing or dust cap are then without the need to cleaning.
Being provided with of usual bearing press-fits and hot charging two kinds of methods.Press-fit in two kinds of situation, one is bearing inner race and axle interference fit and bearing outer ring and bearing saddle bore interference fits, is usually first fitted on axle by bearing, then loads in bearing saddle bore by axle together with bearing; Another kind be bearing outer ring and bearing saddle bore interference fit and bearing inner race and axle are interference fits time, first bearing is pressed in bearing saddle bore, then axle is connected with bearing.Hot charging refers to by heating bearing or bearing block, utilizes object expanded by heating interference fit to be installed the method changing matched in clearance into and install.Usual hot charging is that the lasso of bearing or separated type bearing is put into fuel tank homogeneous heating, and in fuel tank Oil-temperature control between 80 degrees Celsius to 100 degrees Celsius.
In practical operation, normally hot charging is combined with press-fiting.Because the outer ring of bearing and bearing block are interference fit during bearing such as on mounted motor base, bearing is normally first encased in bearing saddle bore by inner ring and the axle interference fits of bearing, after axle and bearing are inserted in bearing inner race.But the bearing on mounted motor base normally adopts copper rod to clash into bearing face, by bearing knock in bearing saddle bore.Current copper rod clashes into bearing and normally adopts artificial shock, and occur deviation unavoidably, impact groove bearing outer-ring, clashes into bearing inner race sometimes sometimes, is difficult to ensure that bearing is being knocked stress equalization in process, and shaft strength inequality can cause hitting splits bearing or dress angle pedestal bearing.
Utility model content
The technical problems to be solved in the utility model adopts copper rod shock to there is the deficiency of hitting and splitting bearing or dress angle pedestal bearing for installing bearing, provides a kind of bearing hold down gag to have bearing stress equalization in installation process and avoid hitting the feature splitting bearing, dress angle pedestal bearing.
In order to solve the problems of the technologies described above, the utility model provides following technical scheme: bearing hold down gag, comprises dwang and pre-load nut; Dwang comprise connect successively from left to right clamping part, the shaft shoulder, axle journal and threaded portion, shaft shoulder external diameter is less than bearing outside diameter to be installed, and axle journal coordinates with bearing clearance to be installed, and threaded portion diameter is less than journal diameter; Described pre-load nut is threaded with dwang.
Adopt the bearing hold down gag of technical solutions of the utility model, comprise dwang and pre-load nut; Dwang is followed successively by clamping part, the shaft shoulder, axle journal and threaded portion from left to right; Spanner clamping clamping part and rotate clamping part make dwang rotate and in axial direction move, the shaft shoulder plays keeps out bearing effect and bearing is moved axially with dwang.Clamping part external diameter is less than shaft shoulder external diameter, and shaft shoulder external diameter is less than the external diameter of bearing to be installed; Avoid bearing in the process of press-in bearing saddle bore because the external diameter of the shaft shoulder can not be inserted in bearing saddle bore than the large shaft shoulder in the aperture of bearing saddle bore, bearing does not arrive at the bottom of bearing saddle bore.Threaded portion diameter is less than journal diameter; Bearing is facilitated to penetrate into axle journal smoothly from threaded portion.Described pre-load nut comprises pretension portion and friction part, and pre-load nut is threaded with dwang; Spanner clamping pretension portion also rotates pre-load nut and carries out pretension to pre-load nut, dwang and pre-load nut relative motion, after pre-load nut pretension, pre-load nut is by the axial force of dwang, and friction part contacts with bearing block outer face, friction part and bearing block outer face produce frictional force, dwang pre-load nut in rotation process is not rotated with dwang, then when dwang rotates, the relative bearing block transfixion of pre-load nut, makes dwang move at axial direction.
Operation principle of the present utility model and beneficial effect are: when specifically using, and usually bearing to be installed are pre-installed 5 millimeters in bearing saddle bore, are inserted by dwang in bearing, and dwang is through bearing saddle bore and through hole, and pre-load nut is threaded with dwang.Rotary motion pole pair pre-load nut carries out pretension, pre-load nut is contacted and the shaft shoulder and bearing touch with bearing block outer face.Because dwang is threaded with pre-load nut and the frictional force that pre-load nut and bearing block outer face produce stops pre-load nut together to rotate with dwang in dwang rotary course, therefore during dwang rotation, dwang moves to pre-load nut end, makes the shaft shoulder be pressed in bearing saddle bore by bearing.Bearing is being pressed into owing to being that the shaft shoulder and bearing offset and move forward in bearing saddle bore process, and therefore, shaft strength is uniform, avoids occurring that bearing fills inclined situation, it also avoid bearing and is hit situation about splitting.
Further, described pre-load nut comprises pretension portion and friction part.Clamping action plays when pre-load nut pretension in pretension portion, and friction part is friction part and bearing block end contact in dwang rotary course, makes the relative bearing block transfixion of pre-load nut.
Further, the described shaft shoulder is provided with annular groove near the end at axle journal place, and the internal diameter of annular groove is less than the external diameter of axle journal, seamlessly transits inside the annular groove of the shaft shoulder with axle journal.Only have bearing outer ring to contact with the shaft shoulder when shaft shoulder and bearing touch, reduce the processing of shaft shoulder polished surface, reduce difficulty of processing, the contact surface difficulty of processing that a fine finishining contacts with bearing outer ring for fine finishining whole shaft shoulder end face is lower.
Further, described friction part end face is provided with locating convex block.The through hole pre-load nut when the aperture of through hole is less be connected for bearing saddle bore is contacted with bearing block outer face by projection, and when the aperture of through hole is larger, projection is positioned at through hole, and pre-load nut is contacted with bearing block outer face by friction part.Make a pre-load nut be applicable to the bearing block of plurality of specifications, increase the versatility of pre-load nut.
Further, the end of described threaded portion is provided with the guide part that diameter is less than threaded portion.In installation pre-load nut and dwang connection procedure, pre-load nut first penetrates guide part and is connected with threaded portion, guide part play the guiding role in pre-load nut and threaded portion connection procedure, because making the silk tooth of pre-load nut be extruded damage without guiding when avoiding pre-load nut to be connected with threaded portion, if pre-load nut silk tooth is pinched bad, pre-load nut cannot be connected with threaded portion.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, technical solutions of the utility model are further illustrated:
Fig. 1 is the schematic diagram of the utility model bearing hold down gag embodiment one dwang;
Fig. 2 is the schematic diagram of pre-load nut in the utility model bearing hold down gag embodiment one;
Fig. 3 is the utility model bearing hold down gag embodiment one bearings mounted original state schematic diagram in bearing block;
Fig. 4 is the utility model bearing hold down gag embodiment one view after bearings mounted installation in bearing block;
Fig. 5 is the utility model bearing hold down gag embodiment two bearings mounted installation original state schematic diagram in bearing block;
Fig. 6 is the utility model bearing hold down gag embodiment two bearings mounted installation view in bearing block;
Fig. 7 is the schematic diagram of the utility model bearing hold down gag embodiment three dwang;
Fig. 8 is the schematic diagram of the utility model bearing hold down gag embodiment four pre-load nut;
Fig. 9 is the utility model bearing hold down gag embodiment four bearings mounted original state schematic diagram in bearing block;
Figure 10 is the utility model bearing hold down gag embodiment bearings mounted completion status schematic diagram in bearing block.
Reference numeral in figure: dwang-100, pre-load nut-200, clamping part-101, the shaft shoulder-102, annular groove-1021, axle journal-103, threaded portion-104, escape-1041, guide part-105, pre-load nut-200, pretension portion-201, friction part-202, screwed hole-203, bearing block-300, bearing saddle bore-301, through hole-302, deep groove ball bearing-400.
Detailed description of the invention
Embodiment one
As shown in Figure 1 and Figure 2, the utility model bearing hold down gag is made up of dwang 100 and pre-load nut 200, and pre-load nut 200 is sheathed on dwang 100; Dwang 100 is followed successively by from left to right: clamping part 101, the shaft shoulder 102, axle journal 103, threaded portion 104 and guide part 105, the axial conllinear of the axial line of clamping part 101, the axial line of the shaft shoulder 102, the axial line of axle journal 103, the axial line of threaded portion 104 and guide part 105, the external diameter of clamping part 101 is less than the external diameter of the shaft shoulder 102, threaded portion 104 diameter is less than axle journal 103 diameter, and guide part 105 diameter is less than threaded portion 104.Clamping part 101 is six prisms, and the shaft shoulder 102 is disk, and axle journal 103 is cylinder, and threaded portion 104 is threaded rod, and guide part 105 is cylinder; Pre-load nut 200 is made up of pretension portion 201 and friction part 202, and pre-load nut 200 is provided with screwed hole 203.Pretension portion 201 is six prisms, and friction part 202 is disk.
In specific implementation process, clamping part 101 is length of sides is 20 millimeters, be highly six prisms of 25 millimeters, the shaft shoulder 102 is outside diameters is 62 millimeters, tolerance is negative 0.08 millimeter is the cylinder of 15 millimeters to negative 0.1 height, axle journal 103 is external diameters to be 30 millimeters of tolerances be negative 0.04 millimeter be the cylinder of 60 millimeters to negative 0.06 mm length, to be length be in the threaded portion 104 M24 threaded rod of 110 millimeters, it is 2 millimeters that threaded portion 104 is provided with width near axle journal 103 place, the degree of depth is the escape 1041 of 2 millimeters, guide part 105 is length is 10 millimeters, diameter is the cylinder of 18 millimeters.Clamping part 101, the shaft shoulder 102, axle journal 103, threaded portion 104 and guide part 105 are one-body molded.Six prisms that pretension portion 201 is length of sides is 20 millimeters, length is 25 millimeters, the disk that friction part 202 is outside diameters is 64 millimeters, thickness is 10 millimeters, the screwed hole 203 of pre-load nut 201 is M24, and pretension portion 201 is one-body molded with friction part 202.
As shown in Figure 3, Figure 4, in the bearing saddle bore 301 of bearing block 300, install the deep groove ball bearing 400 that three bearing designations are 6206 in advance, model is the internal diameter of 6206 deep groove ball bearings 400 is 30 millimeters, and external diameter is 62 millimeters, and width is 16 millimeters, bearing saddle bore 301 is positioned at inside bearing block 300, the diameter of bearing saddle bore 301 is 62 mm depths is 55 millimeters, first two deep groove ball bearings 400 are set on axle journal 103, bearing saddle bore 301 is made to become large to bearing saddle bore 301 heating again, a deep groove ball bearing 400 is pre-installed 5 millimeters in dead eye, then cover there is the dwang 100 of two deep groove ball bearings 400 through the through hole 302 be positioned on the deep groove ball bearing 400 at bearing saddle bore 301 place and bearing block 300, threaded portion 104 is installed pre-load nut 200, and pretension is carried out to pre-load nut 200, make three bearing close contacts and pre-load nut 200 contacts with bearing block 300 wall.Applying power with spanner to clamping part 101 makes dwang 100 rotate, the frictional force produced between pre-load nut 200 with bearing block 300 wall stops pre-load nut 200 to rotate with dwang 100, due to dwang 100 connecting pre-load nut 200, pre-load nut 200 contacts and pretension with bearing block 300 wall, dwang 100 moves near pre-load nut 200 end in rotation process, dwang 100 moves and drives dynamic deep groove ball bearing 400 to move to pre-load nut 200 end, finally makes deep groove ball bearing 400 be fixed in bearing saddle bore 301.
Embodiment two
Embodiment two is with the difference of embodiment one, and as described in Fig. 5, Fig. 6, the bearing saddle bore 301 of bearing block 300 is positioned at the outside of bearing block 300.During installation bearing, dwang 100 is the lateral medial movement from bearing block 300.
Embodiment three
Embodiment three is on the basis of embodiment two with the difference of embodiment two, and as shown in Figure 7, the shaft shoulder 102 is provided with annular groove 1021 near axle journal 103 place, and the inner ring diameter of annular groove 1021 is 25 millimeters, race diameter be 56 mm depths is 2 millimeters.Annular groove makes the outer ring of deep groove ball bearing 400 contact with the shaft shoulder 102.
Embodiment four
Embodiment four is with the difference of embodiment three: on the basis of embodiment three, as shown in Figure 8, and the internal diameter that friction part 202 is provided with dome ring 204 dome ring 204 is 40 mm outer diameter is 56 millimeters, is highly 4 millimeters.As shown in Figure 9, when the diameter of through hole is between 40 millimeters to 56 millimeters, dome ring 204 contacts with bearing block 300 wall; As shown in Figure 10, when the diameter of through hole is between 57 millimeters to 62 millimeters, dome ring 204 is arranged in through hole 302, and friction part 202 contacts with bearing block 300 wall.Same pre-load nut 200 is made to be applicable to the bearing block 300 of Multiple Type.
For a person skilled in the art; under the prerequisite not departing from the utility model structure; can also make some distortion and improvement, these also should be considered as protection domain of the present utility model, and these all can not affect effect and the practical applicability of the utility model enforcement.
Claims (5)
1. bearing hold down gag, is characterized in that: comprise dwang and pre-load nut; Dwang comprise connect successively from left to right clamping part, the shaft shoulder, axle journal and threaded portion, shaft shoulder external diameter is less than bearing outside diameter to be installed, and axle journal coordinates with bearing clearance to be installed, and threaded portion diameter is less than journal diameter; Described pre-load nut is threaded with dwang.
2. bearing hold down gag as claimed in claim 1, is characterized in that: described pre-load nut comprises pretension portion and friction part.
3. bearing hold down gag as claimed in claim 2, it is characterized in that: the described shaft shoulder is provided with annular groove near the end at axle journal place, the internal diameter of annular groove is less than the external diameter of axle journal, seamlessly transits inside the annular groove of the shaft shoulder with axle journal.
4. bearing hold down gag as described in Claims 2 or 3, is characterized in that: described friction part end face is provided with locating convex block.
5. bearing hold down gag as claimed in claim 4, is characterized in that: the end of described threaded portion is provided with the guide part that diameter is less than threaded portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420715014.7U CN204277386U (en) | 2014-11-25 | 2014-11-25 | Bearing hold down gag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420715014.7U CN204277386U (en) | 2014-11-25 | 2014-11-25 | Bearing hold down gag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204277386U true CN204277386U (en) | 2015-04-22 |
Family
ID=52860582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420715014.7U Expired - Fee Related CN204277386U (en) | 2014-11-25 | 2014-11-25 | Bearing hold down gag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204277386U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108778905A (en) * | 2016-03-14 | 2018-11-09 | Ksm铸造集团有限公司 | Method for manufacturing wheel carrier thermally treated, with wheel bearing |
| CN111644805A (en) * | 2020-06-03 | 2020-09-11 | 北京首钢股份有限公司 | Hot-fitting tool and method for coupler |
| CN112975343A (en) * | 2021-02-25 | 2021-06-18 | 上海电气风电集团股份有限公司 | Double-bearing structure mounting equipment and double-bearing structure mounting method |
-
2014
- 2014-11-25 CN CN201420715014.7U patent/CN204277386U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108778905A (en) * | 2016-03-14 | 2018-11-09 | Ksm铸造集团有限公司 | Method for manufacturing wheel carrier thermally treated, with wheel bearing |
| CN111644805A (en) * | 2020-06-03 | 2020-09-11 | 北京首钢股份有限公司 | Hot-fitting tool and method for coupler |
| CN111644805B (en) * | 2020-06-03 | 2022-02-22 | 北京首钢股份有限公司 | Hot-fitting tool and method for coupler |
| CN112975343A (en) * | 2021-02-25 | 2021-06-18 | 上海电气风电集团股份有限公司 | Double-bearing structure mounting equipment and double-bearing structure mounting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151125 |