CN104568441A - Bearing friction torque measuring tool and bearing pre-tightening amount verifying method - Google Patents
Bearing friction torque measuring tool and bearing pre-tightening amount verifying method Download PDFInfo
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- CN104568441A CN104568441A CN201510020315.7A CN201510020315A CN104568441A CN 104568441 A CN104568441 A CN 104568441A CN 201510020315 A CN201510020315 A CN 201510020315A CN 104568441 A CN104568441 A CN 104568441A
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Abstract
The invention provides a bearing friction torque measuring tool. The bearing friction torque measuring tool comprises a torque wrench, a rotating positioning rod and a positioning disc, wherein the rotating positioning rod is provided with a torque input section, a cylinder section and a torque output section, the positioning disc is provided with a cover part and a pipe part, the cover part is provided with a through hole, the lower end of the pipe part stretches out to form a plurality of positioning columns, the torque input section of the rotating positioning rod penetrates through the through hole in the cover part of the positioning disc and then is matched with the torque wrench, the cylinder section of the rotating positioning rod is limited in the pipe part through the cover part of the positioning disc, and the cylinder section and the pipe part are rotationally matched. The invention further provides a bearing pre-tightening amount verifying method through the tool. The friction torque of a bearing closed in a shell can be measured with low cost, and the bearing pre-tightening amount is verified.
Description
Technical field
The present invention relates to torque value fields of measurement, be specifically related to preloaded bearing friction torque survey instrument and bearing pre-tightened amount verification method.
Background technology
In through-drive field, rotating shaft needs to be bearing in enclosure interior by bearing usually.For an output shaft of a kind of typical double clutch gearbox shown in Fig. 2, typical transmission device of double clutch transmission is referred to and is connected by two clutch couplinges respectively with two input shafts, realize torque conversion and output via different output shaft, thus transmit engine power.Double clutch gearbox adopts taper roll bearing to support output shaft 2.Taper roll bearing is made up of inner ring 3, outer ring 4 and roller 5 three part, and inner ring 3 is fitted on output shaft 2, and outer ring 4 is then pressed into in the bearing saddle bore of the housing 1 of inner ring 3 corresponding matching, relies on housing 1 to compress.Roller 5 is between inner ring 3 and outer ring 4.The axial pre tightening force of taper roll bearing is regulated by the adjustment pad 6 between apolegamy housing 1 and outer ring 4.
It is quite crucial for carrying out pretension to bearing, suitable pretightning force can strengthen bearing life, make wheel box more steady in running up, and can reduce because high temperature causes parts to expand, tooth axle system is reduced in the interference risk of transmission internal play.Whether reasonably the pretightning force of bearing weighs wheel box assemble rear bearing pretension index, controlled by rational pretension amount in the design phase, but pretightning force be not easy measurement.
There are the apparatus and method separately moment of torsion of bearing detected in prior art, such as application number be CN201210048067.3, name is called " `
The test method that bearing temperature, dynamic torque detect and test unit " Chinese invention patent in disclosed; by hydraulic cylinder, pretightning force is applied to bearing; utilize driven by motor bearing to rotate, thus acquisition bearing temperature rise, pressure, moment of torsion form carry out curve plotting according to form.The words that similar measurement mechanism and measuring method are applied in Production of bearing factory are feasible, because Production of bearing factory needs to produce in batches bearing and detect.Under the prerequisite that system architecture, temperature etc. are certain, bearing pre-tightened amount (power) and friction torque (also referred to as starting torque) have mutual corresponding relation, shown in curve such as in table 1 or Fig. 1 of drawing according to table one, data wherein in table 1 and Fig. 1 can either obtain according to theory calculate, and foregoing apparatus and method also can be adopted to be obtained by test.If friction torque can be obtained, just the pretension force value corresponding with friction torque can be checked in from table 1 or Fig. 1.
Table 1 pretightning force and friction torque relation table
| Pretightning force/N | Friction torque/Nm |
| 40 | 1.58 |
| 50 | 1.72 |
| 60 | 1.83 |
| 70 | 1.95 |
| 80 | 2.12 |
| 90 | 2.3 |
| 100 | 2.51 |
| 110 | 2.71 |
| 120 | 2.92 |
| 130 | 3.11 |
| 140 | 3.32 |
After having assembled, the pretightning force of the cone bearing of practical set and design load may have certain difference, the thickness such as adjusting pad 6 selects inappropriate words, then pretightning force (amount) is improper, pretightning force actual value will be caused not meet designing requirement, therefore assembled rear needs and the pretightning force of bearing is verified.Whether suitable for weighing the size of having assembled rear bearing pretension amount, need measure the friction torque of the cone bearing of each output shaft 2, thus draw the scope of each output shaft cone bearing friction torque of wheel box, check in corresponding pretightning force scope again, assembled as transmission assembly the index whether rear checking cone bearing pretightning force meet designing requirement, be also that whether suitable checking adjustment pad 6 select a important indicator simultaneously.But now cone bearing and adjustment pad 6 have been closed in the inside of housing 1, or stop that the is limited and circumferential component such as oil sealing and housing, therefore cannot measure.And, for auto producer, because for the wheel box of same model, as long as record the data of several wheel box in the design phase, just can verify whether bearing pre-tightened amount meets design requirement, be applied to entire block, the pretightning force checking that therefore auto producer carries out is a small amount of detection, and the special measurement device redesigning, purchase complexity is not calculated.
Summary of the invention
The object of this invention is to provide a kind of can at lower cost to the instrument that the friction torque of the bearing be closed in housing is measured, and to the method that bearing pre-fastening is verified.
For achieving the above object, The embodiment provides following technical scheme:
A kind of bearing friction torque survey instrument, comprising: dial torque wrench; Rotate backstay, described rotation backstay has moment of torsion input section, cylindrical section and moment of torsion deferent segment; Positioning disk, described positioning disk has cap and pipe portion, and described cap has through hole, and described pipe subordinate end stretches out multiple reference column; The moment of torsion of described rotation backstay inputs after section passes the through hole of the cap of described positioning disk and coordinates with described dial torque wrench, the cylindrical section of described rotation backstay is limited in described pipe portion by the cap of described positioning disk, and described cylindrical section and described pipe portion rotatable engagement.
Preferably, above-mentioned bearing friction torque survey instrument also comprises bolt, and described bolt top has the blind hole with described moment of torsion deferent segment interference fit.
Preferably, above-mentioned bearing friction torque survey instrument also comprises taper backstay, and described taper backstay is threaded with described bolt, and described taper backstay has conical section.
Preferably, described dial torque wrench is indicating value style dial torque wrench.
Preferably, described dial torque wrench comprises sensor and receiver display panel.
Preferably, described rotation backstay also has the regular prism section between described cylindrical section and described moment of torsion input section, described regular prism section is stretched out in the through hole of described positioning disk, and the cap of described positioning disk has breach, and described sensor is positioned at described breach.
Preferably, start line is carved with in a side of described regular prism section.
A kind of bearing pre-fastening verification method, comprising:
The moment of torsion deferent segment of the rotation backstay of bearing friction torque survey instrument as above is extend in housing and is connected with rotating shaft;
By described positioning disk location on the housing;
Apply moment of torsion by described dial torque wrench to described moment of torsion input section, by described moment of torsion deferent segment to the rotating shaft output torque being provided with bearing being positioned at described enclosure interior, described rotating shaft is at the uniform velocity rotated;
Read the torque value that described dial torque wrench exports;
Search the pretension force value corresponding with described torque value;
The pretension force value checked in and design load are contrasted, thus determines whether bearing pre-tightened amount meets designing requirement.
Preferably, described dial torque wrench comprises sensor and receiver display panel, described rotation backstay also has the regular prism section between described cylindrical section and described moment of torsion input section, rotate described rotating shaft one week, the most hour record torque value of distance between the incline and described sensor of described regular prism section, gets the mean value of multiple described torque value as actual torque value.
The dial torque wrench that the present invention adopts is the common instrument in market, the auxiliary members such as the rotation backstay configured and positioning disk can be obtained by simple machine work, the simple cost of structure is low, moment of torsion deferent segment is extend into after enclosure interior is connected with rotating shaft, be positioned on housing with positioning disk and the rotary motion rotating locating shaft is limited, just the actual friction torque of the bearing after assembling can be recorded easily by dial torque wrench, pretension force value corresponding for measured friction torque and design load are contrasted, just can verify that whether the selection of adjustment pad is suitable.
Further, the mode adopting bolt or bolt to coordinate with taper backstay, realize moment of torsion deferent segment and export to the moment of torsion of rotating shaft, the threaded hole of adaptation rotating shaft or unthreaded hole, improve the versatility of bearing friction torque survey instrument.
Further, select the indicating value style dial torque wrench with sensor and receiver display panel, and adopt regular prism section to coordinate with sensor, distance between the incline of regular prism and sensor can demonstrate on receiver display panel, therefore in the process of rotating shaft, can using the distance minimal instant between the incline of regular prism section and sensor as data point, rotate a circle and just can be recorded to multiple torque value fifty-fifty, average as actual torque value, measuring process is easier, and measured value is more accurate.
Accompanying drawing explanation
Next will be described in further detail specific embodiments of the invention by reference to the accompanying drawings, wherein:
Fig. 1 is the pretightning force-friction torque relation curve drawn according to table 1;
Fig. 2 is a kind of partial sectional view of typical double clutch gearbox;
Fig. 3 is the stereographic map of the friction torque survey instrument of first embodiment of the present invention;
Fig. 4 is the stereographic map of the dial torque wrench of first embodiment of the present invention;
Fig. 5 is the stereographic map of the positioning disk of first embodiment of the present invention;
Fig. 6 is the stereographic map of the rotation backstay of first embodiment of the present invention;
Fig. 7 is the cut-open view adopting the friction torque survey instrument of first embodiment of the present invention to carry out torque measurement;
Fig. 8 is the stereographic map after the taper backstay of second embodiment of the present invention is connected with bolt;
Fig. 9 is the cut-open view adopting the friction torque survey instrument of second embodiment of the present invention to carry out torque measurement.
Description of symbols in figure: 1, housing, 2, output shaft, 3, inner ring, 4, outer ring, 5, roller, 6, adjustment pad, 7, dial torque wrench, 8, positioning disk, 9, rotate backstay, 10, sensor, 11, receiver display panel, 12, spanner, 13, reference column, 14, breach, 15, cap, 16, pipe portion, 17, through hole, 18, moment of torsion input section, 19, regular prism section, 20, incline, 21, start line, 22, cylindrical section, 23, moment of torsion deferent segment, 24, bolt, 25, blind hole, 26, taper backstay, 27, conical section.
Embodiment
In ensuing description, although be that the object being applying moment of torsion with the output shaft 2 of the double clutch gearbox in Fig. 2 carries out exemplary description, but this is not will limit method of work of the present invention, it will be appreciated by those skilled in the art that and bearing torque survey instrument of the present invention and bearing pre-fastening verification method are equally applicable to such as differential mechanism etc. other has the parts of the rotating shaft of being supported by bearing.
With reference to figure 3, bearing friction torque survey instrument comprises dial torque wrench 7, positioning disk 8 and rotates backstay 9 three primary structures.
With reference to figure 4, in first embodiment of the present invention, the dial torque wrench 7 adopted is the dial torque wrench of indicating value style, indicating value style dial torque wrench is the common instrument in market, the moment of torsion that dial torque wrench applies can be shown, generally be divided into digital display type dial torque wrench and dial type dial torque wrench, its principle of work no longer describes in detail herein.More specifically, what adopt in the present embodiment is the digital display type dial torque wrench with sensor 10 and receiver display panel 11.Receiver display panel 11 can show the torque value that the measured value of sensor 10 and spanner 12 apply.
With reference to figure 5, positioning disk 8 has cap 15 and pipe portion 16.Cap 15 has the through hole 17 through with pipe portion 16.Multiple reference column 13 is stretched out lower end in pipe portion 16 downwards.Cap 15 also has breach 14.
With reference to figure 6, rotate backstay 9 and there is continuous print moment of torsion input section 18, regular prism section 19, cylindrical section 22 and moment of torsion deferent segment 23 each other.Wherein, the mating shapes of the spanner 12 in shape and Fig. 4 of moment of torsion input section 18, be positive hexagon, the spanner 12 of such dial torque wrench 7 just can coordinate with the moment of torsion section of input 18, thus to rotating backstay 9 input torque.Regular prism section 19 has multiple incline 20, get six measured values for realization rotates a circle in the present embodiment, the quantity of incline 20 is six, and namely the shape of regular prism section 19 is positive six prisms, but the quantity of different inclines 20 in actual applications, can be selected as required.On a side of regular prism section 19, be also carved with start line 21.
With reference to figure 7, the bearing friction torque survey instrument that this figure indicates first embodiment of the present invention carries out the principle of friction torque measurement to the cone bearing on the output shaft 2 of the double clutch gearbox in Fig. 2.In the present embodiment, have employed bolt 24, more specifically, this bolt 24 is hexagon socket head cap screw, has interior hexagonal blind hole 25.Correspondingly, as seen from Figure 6, moment of torsion deferent segment 23 is also positive hexagon.Generally, endoporus can be left in the end of output shaft 2, is fixed cone bearing inner race 3, and general employing snap ring fixes or bolt is fixed.In the present embodiment, employing be the cone bearing inner ring 3 that bolt 24 fixes output shaft 2 rear end, therefore, bolt 24 as of a bearing friction torque survey instrument parts, also can either directly can utilize the set bolt of the end of output shaft 2.After bolt 24 being screwed in the threaded hole of the end of output shaft 2, bolt 24 is pressed on bearing inner race 3, then the moment of torsion deferent segment 23 rotating backstay 9 is inserted housing 1 inner, makes blind hole 25 interference fit at moment of torsion deferent segment 23 and bolt 24 top.In fact, also moment of torsion deferent segment 23 can be processed external thread, directly realize being threaded with output shaft 2, but now need moment of torsion deferent segment 23 to possess the effect of solid bearing inner ring, therefore, when there is shutoff bolt 24, the moment of torsion deferent segment 23 of positive hexagon is adopted to have advantage.Then, positioning disk 8 is installed, utilize the cap 15 of positioning disk 8 to be limited in pipe portion 16 by the cylindrical section 22 rotating backstay 9, and the external diameter of cylindrical section 22 is identical with the internal diameter in pipe portion 16, makes cylindrical section 22 and pipe portion 16 rotatable engagement.Regular prism section 19 and moment of torsion input section 18 are stretched out through after the through hole 17 on the cap 15 of positioning disk 8.Positioning disk 8 is positioned on housing 1 by reference column 13, and sensor 10 is positioned in breach 14.Then, the moment of torsion input section 18 rotating backstay 9 is coordinated with spanner 12, receives the moment of torsion coming from dial torque wrench 7.
With reference to figure 8, in a second embodiment of the present invention, for coordinating the output shaft 2 with unthreaded hole, have employed taper backstay 26.Taper backstay 26 processes threaded hole vertically, and its outside surface has conical section 27, forms an entirety after bolt 24 is threaded with taper backstay 26, and advantage is can general bolt 24, and threaded hole is better processed.
With reference to figure 9, with the embodiment of first shown in Fig. 7 unlike, in a second embodiment of the present invention, the end as the output shaft 2 of rotating shaft is a unthreaded hole, and this is common in differential design.The conical section 27 of taper backstay 26 is now needed to insert in unthreaded hole, then knock taper backstay 26 gently and make itself and output shaft 2 interference fit, make moment of torsion deferent segment 23 and blind hole 25 interference fit, thus the moment of torsion of dial torque wrench 7 can be passed on output shaft 2.
As from the foregoing, when there is bolt 24 and taper backstay 26, bearing friction torque survey instrument can adapt to the rotating shaft of threaded hole or unthreaded hole, and therefore versatility is stronger.
When verifying bearing pre-fastening, first will record accurate friction torque value, the detailed process measuring friction torque value is:
The moment of torsion deferent segment 23 rotating backstay 9 is extend in housing 1, by bolt 24 or taper backstay 26, the moment of torsion section of input 23 is connected with output shaft 2 depending on rotating shaft different situations, or moment of torsion input section 23 is directly connected with output shaft 2;
By reference column 13, positioning disk 8 is positioned on housing 1;
Apply moment of torsion by dial torque wrench 7 to moment of torsion input section 18, by moment of torsion deferent segment 23 to output shaft 2 output torque, output shaft 2 is at the uniform velocity rotated;
When rotating rotation backstay 9, first by the center line of the measuring surface of start line alignment sensor 10, the descending change of distance when starting to rotate between the side with start line of regular prism section 19 and sensor 10, forward incline 20 to when overlapping with the center line of the measuring surface of sensor 10, distance shown on receiver display panel 11 is minimum, now read the torque value that dial torque wrench 7 shown on receiver display panel 11 exports, output shaft 2 at the uniform velocity rotates a circle, and six minimum value appear in the distance of six inclines and sensor 10, correspondingly can read six torque values.The internal processes of receiver display panel 11 can automatically record six secondary data and average and show, as the actual friction torque of the cone bearing on output shaft 2.
When adopting dial type dial torque wrench to measure, then do not need to rotate backstay 9 and there is regular prism section 19, but the now reading of torque value places one's entire reliance upon, operating personnel carry out at random, due to the reason such as rigging error, part's machining errors and gears meshing be stressed, rotate a circle measure numerical value different, therefore the accuracy of artificial reading numerical values obviously can be lowered, and therefore has regular prism section 19 and the automatic repeatedly value of the mode adopting sensor 10 to coordinate with regular prism section 19 has advantage.
After recording actual friction torque value, search the pretension force value corresponding with this friction torque value by table 1 or Fig. 1, then the pretension force value checked in and design load are contrasted whether just can verify pretightning force suitable.Such as in the design phase, designing requirement pretightning force is 90N, corresponding friction torque is 2.3Nm, corresponding pretension amount is 0.1mm, but find that actual friction torque is 3Nm by measuring after having assembled, therefore the pretension amount 0.1mm of setting is inappropriate, therefore make the friction torque of measurement meet designing requirement by adjustment pretension amount, namely corresponding pretightning force meets designing requirement.And namely the pretension amount now recorded can be used as the final design load be embodied on drawing.
Although the present invention is described in conjunction with above embodiment, but the present invention is not defined to above-described embodiment, and only by the restriction of claim, those of ordinary skill in the art can easily modify to it and change, but do not leave essential idea of the present invention and scope.
Claims (9)
1. a bearing friction torque survey instrument, is characterized in that, comprising:
Dial torque wrench;
Rotate backstay, described rotation backstay has moment of torsion input section, cylindrical section and moment of torsion deferent segment;
Positioning disk, described positioning disk has cap and pipe portion, and described cap has through hole, and described pipe subordinate end stretches out multiple reference column;
The moment of torsion of described rotation backstay inputs after section passes the through hole of the cap of described positioning disk and coordinates with described dial torque wrench, the cylindrical section of described rotation backstay is limited in described pipe portion by the cap of described positioning disk, and described cylindrical section and described pipe portion rotatable engagement.
2. bearing friction torque survey instrument according to claim 1, is characterized in that, also comprise bolt, and described bolt top has the blind hole with described moment of torsion deferent segment interference fit.
3. bearing friction torque survey instrument according to claim 2, is characterized in that, also comprises taper backstay, and described taper backstay is threaded with described bolt, and described taper backstay has conical section.
4. the bearing friction torque survey instrument according to any one in claims 1 to 3, is characterized in that, described dial torque wrench is indicating value style dial torque wrench.
5. bearing friction torque survey instrument according to claim 4, is characterized in that, described dial torque wrench comprises sensor and receiver display panel.
6. bearing friction torque survey instrument according to claim 5, it is characterized in that, described rotation backstay also has the regular prism section between described cylindrical section and described moment of torsion input section, described regular prism section is stretched out in the through hole of described positioning disk, the cap of described positioning disk has breach, and described sensor is positioned at described breach.
7. bearing friction torque survey instrument according to claim 6, is characterized in that, start line is carved with in a side of described regular prism section.
8. a bearing pre-tightened amount verification method, is characterized in that, comprising:
The moment of torsion deferent segment of the rotation backstay of the bearing friction torque survey instrument as described in any one in claim 1 to 7 is extend in housing and is connected with rotating shaft;
By described positioning disk location on the housing;
Apply moment of torsion by described dial torque wrench to described moment of torsion input section, by described moment of torsion deferent segment to the rotating shaft output torque being provided with bearing being positioned at described enclosure interior, described rotating shaft is at the uniform velocity rotated;
Read the torque value that described dial torque wrench exports;
Search the pretension force value corresponding with described torque value;
The pretension force value checked in and design load are contrasted, thus determines whether bearing pre-tightened amount meets designing requirement.
9. bearing pre-tightened amount verification method according to claim 8, it is characterized in that, described dial torque wrench comprises sensor and receiver display panel, described rotation backstay also has the regular prism section between described cylindrical section and described moment of torsion input section, rotate described rotating shaft one week, the most hour record torque value of distance between the incline and described sensor of described regular prism section, gets the mean value of multiple described torque value as actual torque value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510020315.7A CN104568441B (en) | 2015-01-15 | 2015-01-15 | Bearing friction torque survey tool and bearing pre-tightened amount verification method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510020315.7A CN104568441B (en) | 2015-01-15 | 2015-01-15 | Bearing friction torque survey tool and bearing pre-tightened amount verification method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107941630A (en) * | 2017-11-28 | 2018-04-20 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of experimental rig and method of determination limit moment of torsion |
| CN108519182A (en) * | 2018-03-19 | 2018-09-11 | 中科新松有限公司 | A kind of test instrument for brake torque moment device and method based on waveform spring |
| CN109333439A (en) * | 2018-11-29 | 2019-02-15 | 奇瑞商用车（安徽）有限公司 | For measuring the simple accessory and method of adjustment of rear axle hub bearing staring torque |
| CN113588146A (en) * | 2021-07-29 | 2021-11-02 | 人本股份有限公司 | Detection tool for detecting friction torque between bearing sealing ring and outer ring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107941630A (en) * | 2017-11-28 | 2018-04-20 | 中车戚墅堰机车车辆工艺研究所有限公司 | A kind of experimental rig and method of determination limit moment of torsion |
| CN107941630B (en) * | 2017-11-28 | 2024-03-29 | 中车戚墅堰机车车辆工艺研究所股份有限公司 | Test device and method for measuring limit torque |
| CN108519182A (en) * | 2018-03-19 | 2018-09-11 | 中科新松有限公司 | A kind of test instrument for brake torque moment device and method based on waveform spring |
| CN109333439A (en) * | 2018-11-29 | 2019-02-15 | 奇瑞商用车（安徽）有限公司 | For measuring the simple accessory and method of adjustment of rear axle hub bearing staring torque |
| CN113588146A (en) * | 2021-07-29 | 2021-11-02 | 人本股份有限公司 | Detection tool for detecting friction torque between bearing sealing ring and outer ring |
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| CN104568441B (en) | 2017-09-05 |
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