CN1396390A - Low-speed small bearing with high load capacity - Google Patents
Low-speed small bearing with high load capacity Download PDFInfo
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- CN1396390A CN1396390A CN 02140852 CN02140852A CN1396390A CN 1396390 A CN1396390 A CN 1396390A CN 02140852 CN02140852 CN 02140852 CN 02140852 A CN02140852 A CN 02140852A CN 1396390 A CN1396390 A CN 1396390A
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- bearing
- little
- needle roller
- pressure
- outer ring
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Abstract
A low-speed bearing with very high load-bearing power features that the elongated quill rollers are installed in widened external ring and then they are enclosed by press plates, and the internal ring whose width is greater than that of external ring is installed in the external ring. Its advantage is relative slide of external ring and roller to the internal ring.
Description
Technical field
The present invention relates to bearing, be applicable to that particularly a kind of low speed of driver seat especially can the little bearing of resistant to pressure.
Background technique
Common bearing has much at present, and two big classes are generally speaking arranged, and a class is a ball bearing, and another kind of is roller (pin) bearing.The anti-static pressure of ball bearing is poor.Roller (pin) bearing can resistant to pressure.But roller (pin) bearing compressive resistance common on the present market is big not enough, and some have the place of specific use can use.Such as: I father Liu Yun is recruited in 92 years and has just invented " a kind of driver seat ", and the patent No. is: 92100620.9.When automobile met accident, " a kind of driver seat " became the seat of safety zone motion rearwards from the former seat that fixes, and steering wheel, the instrument panel of avoiding or reduced distortion directly push the injury that causes to the driver.
" a kind of driver seat " needs two kinds of bearings: 1, the bearing outer ring external diameter is about 20mm, and the inner ring internal diameter is 12mm, 2, the bearing outer ring external diameter is about 18mm, and the inner ring internal diameter is 10mm.Because when automobile crashes, the pressure that the bearing in the safety chair seats of car is subjected to can reach 22000 newton, adopts model to be: NKI10/20 and Na6901 resistant to pressure needle bearing.The safety seat that my father will be equipped with these two kinds of bearings is contained on two kinds of different automobiles (cart and dolly).The result just found to have the cracked phenomenon of bearing less than 10 days.He had selected for use the bigger model of Internal and external cycle to be afterwards: the Na6902 needle bearing, travel on highway and no longer find to have the damage of bearings phenomenon.But provided funds in the true car collision experiment that Tsing-Hua University does by him, Na6902 needle bearing outer ring also has cracked situation to take place, and have to select the bigger needle bearing of Internal and external cycle.The seat basis that the result is tall and big, heavy cannot be contained on the sedan car.
Know through " bearing products sample " book of looking into China Machine Press's publication: the specified radially static load of NKI10/20 needle bearing is 14000 newton, and the specified radially static load of Na6901 is 21500 newton.The specified radially static load of Na6902 needle bearing reaches 25200 newton, radially static load is so high, why also can be cracked in automotive seat? I think that reason is: the data in the book are to test under the bearing condition of working in bearing housing or bearing support to obtain, if it is the same with driver seat, not only there is not bearing support, and be the words of utilizing bearing outer ring to move as wheel, the specified radially static load of conventional bearing can not reach the data of indicating in the books, reason is: bearing is when rotating, suppose that bearing shaft is parallel to the ground, frictional force is ignored, bearing outer ring above water only is subjected to reaction force---the effect of centrifugal force F of the little centripetal force of the numerical value that applies by needle roller, the part of bearing outer ring below horizontal plane, the every bit that contacts with needle roller is all when being subjected to the little centrifugal force F effect of numerical value, not only be subjected to the action of gravity of object on the bearing shaft (being load) at position bottom, and other each position that contacts with needle roller all is subjected to the action of gravity that the object (load) on the bearing shaft applies by needle roller, as shown in Figure 1, A. needle roller B. bearing shaft C. bearing inner race D. outer ring E. bearing support F. gravity F ｀ wherein. centrifugal force, making a concerted effort being fulcrum bottom of they, can produce a moment loading, because the effect of bearing support is arranged, this moment is little to the bearing outer ring influence.If not only there is not bearing support, and be, directly make the words of wheel with bearing outer ring as " a kind of driver seat ", this moment to bearing outer ring influence just not little (see figure 2) because present conventional bearing is with special bearing steel GC
r15 make, after Overheating Treatment, thus wear-resisting, extreme hardness, but poor toughness (because hardness and toughness can not be taken into account).As seen, bearing commonly used does not at present have the words of bearing support (or cover), and its specified radially pressure-bearing is not very big.
This shows that the required inside and outside footpath of bearing of " a kind of driver seat " of my father invention is little, again especially can resistant to pressure and the bearing of antidetonation, do not have in the market at all.My father's invention has reached 10 years so far can't form commodity, reason has multiple certainly, and bearing is excessive to be a major reason, and this problem can't resolve, huge volume, frightful weight also can't resolve certainly, and " a kind of driver seat " just is difficult to be accepted by the Consumer.
Technology contents
The objective of the invention is to overcome the deficiency of prior art, provide a kind of and can reach the little bearing of low speed special energy resistant to pressure that " a kind of driver seat " requires.
Order of the present invention is to realize by following technological scheme.
A kind of low speed can comprise bearing shaft by the little bearing of resistant to pressure especially, it is characterized in that: bearing has that material is different with conventional bearing, width is bigger 0.6 times than the conventional needle bearing width with external diameter, an end has the little circular hole greater than the bearing inner race external diameter of diameter, an other end that a bearing outer ring of laying the ladder that the needle roller compressing tablet uses is arranged, and bearing also has one to seal compressing tablet that needle roller uses, extended the needle roller, width of length greater than the bearing inner race of bearing outer ring than the conventional bearing needle with external diameter.
Laying ladder that the needle roller compressing tablet uses on the above-described bearing outer ring has and pushes down the thin-walled that the needle roller compressing tablet is used.
A little circular hole greater than the bearing inner race external diameter is arranged in the middle of the above-described needle roller compressing tablet.
Above-described bearing inner race is loose fit with the bearing shaft that is placed in the inner ring, and the inner ring inner diameter is greater than the bearing shaft diameter that is contained in the inner ring.
The ladder that has the block axis bearing outer-ring to use on the above-described bearing inner race to the inner ring movement outside.
The characteristics and the working procedure that realize the little bearing of a kind of low speed of the present invention special energy resistant to pressure are as follows: the characteristic of considering the work of driver's seat: movement velocity is unhappy, do not take regular exercise yet, need not consider wearing and tearing, but the pressure that automobile bears when crashing is very big.The load that increases bearing can adopt thickness that increases bearing enclose and the width of widening bearing enclose to reach, and the safety front row seats in automobile needs is that bearing enclose should be little, but special resistant to pressure, so adopt the needle roller length that extends, widen the inside and outside circle width of bearing and directly make the method for bearing enclose and achieve the goal with being not easy cracked material.
The present invention has not only adopted needle bearing, but also is that the conventional needle bearing of Na6901 has increased by 0.6 times bearing outer ring width than model, and needle roller has also increased length, has strengthened the resistant to pressure ability of bearing.Adding the inside and outside circle of bearing of the present invention is to use the material different with conventional bearing to make, and good toughness, anti-vibration, intensity also satisfy the requirement of driver's seat.
When bearing is installed, at first will seal compressing tablet that needle roller uses is placed in the ladder on the bearing outer ring, with the ladder thin-walled compressing tablet is compressed again, after the needle roller that will extend be placed in the bearing outer ring of having widened, at last width is put in the outer ring (the two axis coinciding) greater than the bearing inner race (inner diameter is greater than the bearing shaft diameter that is contained in the inner ring) of outer ring.When bearing need rotate, because the internal diameter width of bearing is greater than the width of outer ring, so bearing outer ring when rotating with the rolling of little needle roller also with little needle roller together along the bearing inner race left side or the right side do very little axial motion (because movement velocity is little, so do not have adverse consequences), when the obstacle that moves to bearing outer ring and bearing inner race both sides (as pad, when the ladder on bearing inner race one end) contacting, bearing outer ring can move to the bearing inner race mid point with needle roller again, as seen, in this, the outer ring is not only and is used the material different with conventional bearing to make, but also increased width and the special of the needle roller length that extended can the little bearing of resistant to pressure, can make low-speed motion, be well suited in " a kind of driver seat ", using.
The present invention compared with the prior art, substantive distinguishing features and progress that it is outstanding are:
1, prior art is with making bearing special steel GC
r15 make the inside and outside circle of bearing, and hardness is very high after the heat treatment, because hardness and toughness can not be taken into account, so poor toughness shakes the words strong, that pressure is big, bearing is cracked easily.And the present invention uses the material different with conventional bearing to make the inside and outside circle of bearing, the bearing good toughness, and the cracked phenomenon of bearing can not take place in anti-vibration, is well suited for should having in safety chair seats of car.
2, because bearing shaft of the present invention and inner ring are the loose fit (little 0.1～0.8mm of axial ratio inner ring internal diameter, be to fix bearing) with part or pad that the nut on the axle compresses the bearing inner race both sides, raw material hardness is suitable, so the thickness of the inside and outside circle of bearing of the present invention (outer separately, difference in internal diameters) can design thinlyyer than the prior art, bearing outside diameter can design for a short time, can satisfy the requirement of " a kind of driver seat ".
3, the bearing width of prior art is littler with the bearing width of external diameter than the present invention, and at pressure one regularly, pressure is excessive, so resistant to pressure power is poor.And bearing outer ring width of the present invention is not only than having widened 0.6 times with the prior art bearing of external diameter, the length of needle roller has also extended, under identical pressure, the inside and outside circle pressure of bearing is little, add that material is different with prior art, so especially can resistant to pressure (through test, the present invention when not having the situation of bearing support radially pressure-bearing can reach 25000 newton).Prior art then can not.
4, prior art technological process complexity, material requested cost height, and manufacture process of the present invention is simple, the material requested price is low.
5, the inside and outside footpath of the bearing of prior art width is identical, can not directly be applied in the driver seat, and bearing inner race width of the present invention can directly be applied in " a kind of driver seat " greater than the width of bearing outer ring.
Description of drawings
Fig. 1 is the free-body diagram of prior art bearing bearing outer ring when bearing support is arranged.
Fig. 2 is the free-body diagram of prior art bearing bearing outer ring when not having bearing support
Fig. 3 is the view that a kind of low speed of proposing of the present invention especially can the little bearing embodiment 1 of resistant to pressure.
Fig. 4 embodiment 1 bearing outer ring is along the sectional view of shaft centre line.
Fig. 5 is the sectional view of the little bearing embodiment 1 of low speed special energy resistant to pressure along shaft centre line.
Fig. 6 is the sectional views of embodiment's 2 bearing inner races along shaft centre line.
1. bearing inner races, 2. bearing outer rings in the accompanying drawing 3.
The little circular hole greater than the bearing inner race external diameter of diameter on 3. bearing outer rings, one end in the accompanying drawing 4 is 4. laid on the bearing outer ring on ladder 5. bearing outer rings that the needle roller compressing tablet uses and is pushed down the ladder thin-walled that the needle roller compressing tablet is used.
6.6 ｀ in the accompanying drawing 5. bearing needle 7. is sealed needle roller compressing tablet 8 that bearing needle uses than the circular hole that allows bearing inner race pass on big bearing inner race circular hole 9. compressing tablets of bearing shaft
10. embodiments, 2 external diameters are greater than the bearing inner race external diameter but less than the bearing inner race ladder of bearing outer ring external diameter in the accompanying drawing 6.
Embodiment
The contrast accompanying drawing is described in further detail the present invention in conjunction with the embodiments below.
In normal state, needle roller 6,6 ｀ etc. are enclosed in the bearing outer ring 2 by the needle roller compressing tablet 7 in the ladder 4, needle roller compressing tablet 7 is sealed by the ladder thin-walled 5 of bearing outer ring, and bearing inner race 1 passes in the middle of needle roller compressing tablet 7 after passing hole between circular hole 3 on the bearing outer ring 2, needle roller 6,6 ｀ etc. again.
When bearing need roll, because the inner ring 1 of the little bearing of low speed special energy resistant to pressure is wideer than outer ring 2, so needle roller 6,6 ｀ etc. are when rotating, outer ring 2 can also be with needle roller 6,6 ｀ etc. simultaneously along inner ring 1 left side or the right slide, when bearing outer ring is run into the obstacle (as packing ring, part time) on bearing inner race both sides, outer ring 2 again with needle roller 6,6 ｀ etc. to the motion of inner ring 1 mid point, so this kind bearing can only be used in the low speed occasion.January 27 this year, pick up the true car collision experiment result that carry out at the center of testing in the Chinese car quality supervision of Tianjin, this special little bearing has been described, having satisfied " a kind of driver seat " low speed, the inside and outside loop diameter of bearing will be little but requirement that especially can resistant to pressure.
Embodiment 2
For easy for installation, be provided with one-level ladder than embodiment more than 1 at width on greater than the inner ring of outer ring, make bearing outer ring can in the inner ring scope between ladder and the pad (or part), do very little axial motion, all the other with
Claims (5)
1, the little bearing of a kind of low speed special energy resistant to pressure, it comprises bearing shaft, it is characterized in that: bearing has one, and material is different with conventional bearing, width is bigger 0.6 times than the conventional needle bearing width with external diameter, an end has a little circular hole greater than the bearing inner race external diameter of diameter (3), an other end that a bearing outer ring (2) of laying the ladder (4) of needle roller compressing tablet (7) usefulness is arranged; Bearing also has one to seal compressing tablet (7) that needle roller uses, extended the needle roller, width of length greater than the bearing inner race (1) of bearing outer ring (2) than the conventional bearing needle with external diameter.
2, the little bearing of the special resistant to pressure of a kind of low speed according to claim 1 is characterized in that: laying ladder (4) that the needle roller compressing tablet uses on the bearing outer ring has and pushes down the thin-walled that the needle roller compressing tablet is used
3, the little bearing of a kind of low speed according to claim 1 special energy resistant to pressure is characterized in that: a little circular hole greater than the bearing inner race external diameter (3) is arranged in the middle of the needle roller compressing tablet (7).
4, the little bearing of the special energy of a kind of low speed according to claim 1 ballast pressure, it is characterized in that: bearing inner race and bearing shaft are loose fits, inner ring inner diameter (8) is greater than the bearing shaft diameter that is contained in the inner ring.
5, the little bearing of a kind of low speed according to claim 1 special energy resistant to pressure is characterized in that: the ladder (10) that has the block axis bearing outer-ring to use to the inner ring movement outside on the bearing inner race.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02140852 CN1396390A (en) | 2002-07-09 | 2002-07-09 | Low-speed small bearing with high load capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02140852 CN1396390A (en) | 2002-07-09 | 2002-07-09 | Low-speed small bearing with high load capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1396390A true CN1396390A (en) | 2003-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02140852 Pending CN1396390A (en) | 2002-07-09 | 2002-07-09 | Low-speed small bearing with high load capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1396390A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269220A (en) * | 2011-08-05 | 2011-12-07 | 青岛田田实业有限公司 | One-way operating bearing |
| CN106194994A (en) * | 2016-08-31 | 2016-12-07 | 浙江天成自控股份有限公司 | The bearing roller of seat damper |
-
2002
- 2002-07-09 CN CN 02140852 patent/CN1396390A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269220A (en) * | 2011-08-05 | 2011-12-07 | 青岛田田实业有限公司 | One-way operating bearing |
| CN106194994A (en) * | 2016-08-31 | 2016-12-07 | 浙江天成自控股份有限公司 | The bearing roller of seat damper |
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| WD01 | Invention patent application deemed withdrawn after publication |