CN100371233C - Polyurethane rolling wheel and manufacturing method thereof - Google Patents
Polyurethane rolling wheel and manufacturing method thereof Download PDFInfo
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- CN100371233C CN100371233C CNB200410077790XA CN200410077790A CN100371233C CN 100371233 C CN100371233 C CN 100371233C CN B200410077790X A CNB200410077790X A CN B200410077790XA CN 200410077790 A CN200410077790 A CN 200410077790A CN 100371233 C CN100371233 C CN 100371233C
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- wheel hub
- outer ring
- bearing
- roller
- polyurethane
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- 229920002635 polyurethane Polymers 0.000 title claims abstract description 59
- 239000004814 polyurethane Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title abstract description 11
- 238000005096 rolling process Methods 0.000 title 1
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 16
- 239000007924 injection Substances 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 10
- 230000002093 peripheral effect Effects 0.000 claims description 75
- 238000010438 heat treatment Methods 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 9
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000001746 injection moulding Methods 0.000 description 11
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 102220469792 Ras-related C3 botulinum toxin substrate 1_S90A_mutation Human genes 0.000 description 2
- 102220518612 Repressor of RNA polymerase III transcription MAF1 homolog_S60D_mutation Human genes 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Rolls And Other Rotary Bodies (AREA)
Abstract
The present invention relates to a polyurethane roller and a manufacturing method thereof. The roller is composed of an outer ring and a wheel hub, a bearing is fixed to the inner circumferential surface of the wheel hub, and the inner circumferential surface of the outer ring is engaged with the outer circumferential surface of the wheel hub through concave and convex structures. The outer ring uses polyurethane materials whose Shore hardness is from 90 to 95A, and the wheel hub uses polyurethane materials whose Shore hardness is from 60 to 75D. In the manufacturing method, firstly, the polyurethane materials whose Shore hardness is from 90 to 95A are formed by injection to be the outer ring of the roller, and the inner circumferential surface of the cross section of the outer ring is convex; after the surface of the bearing is cleaned, adhesives are thinly coated; after the bearing is thermally treated, the bearing and the heated outer ring are placed in an injection mold. The polyurethane materials whose Shore hardness is from 60 to 75D are poured, and the wheel hub is formed. The cross section of the outer circumferential surface of the wheel hub is concave and is corresponding to the inner circumferential surface of the outer ring, and the inner circumferential surface of the wheel hub is jointed with the bearing; the roller is thermally treated. The manufacturing method of the present invention has the advantages of simple technology and low cost, and the manufactured roller has the advantages of light self weight, firm structure and good carrying capacity.
Description
Technical field
The present invention relates to escalator roller technical field, specifically be meant a kind of polyurethane roller and preparation method thereof.
Background technology
Escalator is generally used for the big occasion of flow of the people, and the requirement of its pair roller serviceability is very high, as requires the roller outer ring that better elasticity is arranged, and inner ring has better rigidity, and requires roller big, wear-resisting etc. from heavy and light, carrying.In production application, usually require that every roller must (for example front wheel be 300 kilograms under certain load, 200 kilograms of rear rollers), under 30 meters/minute linear velocity, move 50 hours continuously, any damage phenomenon does not appear, and the roller operation process require must be very steady, do not allow bigger beating.And whether ageing-resistant in order to determine roller, before the operation test, want first poach (95 ℃) 24 hours, parked again 24 hours, just test.In addition in order to determine that can roller in long-term work under the load, also must be by the life test of clock very much of (the same) 2 under the fixed load, and jerk value also limits within the specific limits.
At present each step of escalator is equipped with each 2 of front wheel and rear rollers, and the outer ring of roller is usually with the manufacturing of injection government rubber, shore hardness 90～95A, and the resistance to abrasion of outer ring, load-carrying capacity can both meet the demands.The problem that exists is: the forging blank of the wheel hub use high-quality steel of (1) front wheel after heat treatment car system forms, and every wheel hub weighs and restrains 200 more, from great, and complex process, cost of manufacture height; (2) wheel hub of rear roller die casting aluminium structure, though weight gentlier, manufacturing cost is still higher, and the process for making contaminated environment.Also have a kind of roller on the market now, its wheel hub is plastic skeleton (for example nylon etc.), and the outer ring is a polyurethane, good from heavy and light, resistance to abrasion, but load-carrying capacity is not strong, because two kinds of materials of this kind roller are formed not close, compatibility is relatively poor, and is bonding not firm mutually, throws off soon during use.If be used for escalator, the performance requriements of the above-mentioned escalator roller of out of reach then.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, provide a kind of wheel hub good from heavy and light, load-carrying capacity, manufacture craft is simple, and the polyurethane roller that cost is low the present invention also aims to provide a kind of method for making of above-mentioned polyurethane roller.
Purpose of the present invention is achieved through the following technical solutions: described a kind of polyurethane roller comprises outer ring, wheel hub composition, the inner peripheral surface of described wheel hub is fixed with ball bearing of main shaft, it is characterized in that: between the inner peripheral surface of described outer ring and the outer peripheral face of wheel hub by concaveconvex structure engagement and bonding mutually, the polyurethane material of shore hardness 90～95A is adopted in described outer ring, and described wheel hub adopts the polyurethane material of shore hardness 60～75D.
Must realize the present invention for better, the central protrusion of described outer ring inner peripheral surface, both sides are provided with shoulder, and its cross-sectional plane is " protruding " shape, and the cross-sectional plane of described wheel hub outer peripheral face is " recessed " shape, and is corresponding with described outer ring inner peripheral surface shape; Described outer ring outer peripheral face is provided with annular channel; Described wheel hub inner peripheral surface both sides are provided with flange, and described flange and the upper and lower end face of described bearing are fitted respectively, and described bearing outer peripheral face has groove, and the inner peripheral surface of described wheel hub and the outer peripheral face of bearing are fitted; Described wheel hub is unitary solid structure or the structure that has reinforced rib.
The method for making of described a kind of polyurethane roller the steps include:
The first step: adopt the polyurethane material injection mo(u)lding roller outer ring of shore hardness 90～95A, its cross-sectional plane inner periphery is " protruding " shape;
Second step: scumbling adhesive agent behind the cleaning bearing surface;
The 3rd step: after bearing heat treatment, injection mould is put in outer ring after heating, shore hardness 60～75D polyurethane material moulding wheel hub reinjects, bonding mutually between the inner peripheral surface of described outer ring and the outer peripheral face of wheel hub, the cross-sectional plane of wheel hub outer peripheral face is " recessed " shape, corresponding with outer ring inner peripheral surface shape, inner circumferential surface and bearing are fitted.
In order to realize the present invention better, when described bearing surface coating adhesive, again roller is heat-treated after the 3rd step; Described bearing surface is cleared up with acetone, trichoroethylen wiping successively; Described adhesive agent comprises Kai Muluoke adhesives 213,218; Described bearing heat-treat condition is 100～150 ℃ and descended 30～45 minutes; Described outer ring heating condition is 100～150 ℃ and heated 30～60 minutes down; Described roller heat-treat condition is 100～150 ℃ and heated 10～20 hours down; Described polyurethane material comprises thermoplastic polyurethane.
In the present invention, the inner peripheral surface of outer ring and the outer peripheral face of wheel hub mesh by concaveconvex structure, have increased the area of contact between outer ring and the wheel hub, have avoided stress concentration simultaneously again, guarantee that both adhere firmly, under high-mechanic and situation about working long hours, can not damage easily.Simultaneously, middle part, outer ring wall thickness, wheel hub middle part respective wall is thin, when having avoided wheel hub injection moulding, does not freely produce the possibility of pore because of the heavy wall exhaust.The outer ring outer peripheral face has annular channel, can avoid the outer ring injection mo(u)lding after, the outstanding situation of burr appears at its external peripheral surface; In the roller use, also can change worn-down situation when judging the roller running by the depth of observing conduit.According to the load size of escalator, wheel hub can manufacture unitary solid or reinforcing rib structure.Bearing that scribbles adhesives and outer ring are put into mould, and the injection moulding wheel hub can guarantee between wheel hub and the bearing, the bond strength between wheel hub and the outer ring, and roller can worked under big load.As adopt bearing outer peripheral face open channels, then during injection moulding because the polyurethane of fusing enters in the groove, wheel hub and bearing are closely chimeric, prevent skidding, even can not need to add adhesives.
The present invention compared with prior art has following advantage and beneficial effect:
(1) polyurethane roller of the present invention's making, its outer ring and wheel hub all are to adopt polyurethane material to make, and the wheel hub of steel, aluminium matter from heavy and light, helps the operation of escalator relatively.
(2) sound construction, load-carrying capacity is good, the polyurethane roller that the present invention makes, the inner peripheral surface of its outer ring and the outer peripheral face of wheel hub mesh by concaveconvex structure, increased the area of contact between outer ring and the wheel hub, avoided stress concentration again, simultaneously, the polyurethane material of shore hardness 90～95A is adopted in the outer ring, and wheel hub adopts the polyurethane material of shore hardness 60～75D, forms close, compatibility is good, mutually bonding firmly, under high-mechanic and situation about working long hours and can not damage easily, its load-carrying capacity can reach 100～200 kilograms/only.
(3) manufacture craft of the present invention is simple, and cost is low, has marketing using value preferably.
Description of drawings
Fig. 1 is a kind of structural representation of polyurethane roller of the present invention;
Fig. 2 is another structural representation of polyurethane roller of the present invention;
Fig. 3 is the bearing outer peripheral face structural representation of polyurethane roller open channels of the present invention;
Fig. 4 is the flow scheme of the method for making of polyurethane roller of the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
As shown in figs. 1 and 3, a kind of polyurethane roller of the present invention comprises outer ring 1, wheel hub 2 (unitary solid), mesh by concaveconvex structure between the outer peripheral face of the inner peripheral surface of outer ring 1 and wheel hub 2, bearing 3 outer peripheral faces have intersection trench 4, ditch groove width 2mm, dark 0.7mm, bearing 3 is fixed on the inner peripheral surface of wheel hub 2.The S90A polyurethane material (thermoplastic polyurethane) of BASF AG is adopted in outer ring 1, shore hardness 90A, and wheel hub 2 adopts the S60D polyurethane material (thermoplastic polyurethane) of BASF AG, and shore hardness 60D, bearing 3 can adopt two ball bearing of main shafts 6202.Wherein, the central protrusion 1-1 of outer ring 1 inner peripheral surface, both sides are provided with shoulder 1-2, and its cross-sectional plane is " protruding " shape; The cross-sectional plane of the outer peripheral face of wheel hub 2 is " recessed " shape, and is corresponding with the inner peripheral surface shape of outer ring 1.The middle part of outer ring 1 outer peripheral face is provided with annular channel 1-3.The inner peripheral surface both sides of wheel hub 2 are provided with flange 2-1, and the upper and lower end face of flange 2-1 and bearing 3 is fitted respectively, and the outer peripheral face of the inner peripheral surface of wheel hub 2 and bearing 3 is fitted.
Embodiment two
As shown in Figure 2, a kind of polyurethane roller of the present invention comprises outer ring 1, wheel hub 2 (band reinforced rib), and by the concaveconvex structure engagement, bearing 3 is fixed on the inner peripheral surface of wheel hub 2 between the outer peripheral face of the inner peripheral surface of outer ring 1 and wheel hub 2.The S90A polyurethane material of BASF AG is adopted in outer ring 1, shore hardness 90A, and wheel hub 2 adopts the S60D polyurethane material of BASF AG, and shore hardness 64D, bearing 3 can adopt two ball bearing of main shafts 6202.Wherein, the central protrusion 1-1 of outer ring 1 inner peripheral surface, both sides are provided with shoulder 1-2, and its cross-sectional plane is " protruding " shape; The cross-sectional plane of the outer peripheral face of wheel hub 2 is " recessed " shape, and is corresponding with the inner peripheral surface shape of outer ring 1.The middle part of outer ring 1 outer peripheral face is provided with annular channel 1-3.The inner peripheral surface both sides of wheel hub 2 are provided with flange 2-1, and the upper and lower end face of flange 2-1 and bearing 3 is fitted respectively, and the outer peripheral face of the inner peripheral surface of wheel hub 2 and bearing 3 is fitted, and wheel hub 2 bodies have the reinforced rib 4 of radial spoke strip.
As shown in Figure 4, the method for making of a kind of polyurethane roller of the present invention can have following embodiment:
Embodiment three
The first step: injection moulding roller outer ring, with polyurethane material (thermoplastic polyurethane) the injection mo(u)lding roller outer ring of shore hardness 90A, the central protrusion of inner circumferential surface, both sides are provided with shoulder, its cross-sectional plane inner periphery is " protruding " shape, and the middle part of outer peripheral face is provided with annular channel;
Second step: bearing surface cleaning, coating adhesive, be stained with the acetone wiping with gentle cloth, use the trichoroethylen wiping again after, dry; With brush at bearing surface scumbling one deck Kai Muluoke 218, after room temperature is parked 30 minutes, scumbling one deck Kai Muluoke 213 again;
The 3rd goes on foot: the injection moulding wheel hub: bearing is placed in the baking oven heat-treats, temperature is 120 ℃, time is 30 minutes, take out bearing then, (use Oven heating with the outer ring after the heating, 120 ℃, 30 minutes) put into injection mould together, the shore hardness 60D polyurethane material that reinjects makes wheel hub, the cross-sectional plane of wheel hub outer peripheral face is " recessed " shape, corresponding with outer ring inner peripheral surface shape, the inner circumferential surface both sides are provided with flange and the upper and lower end face of bearing is fitted respectively, and the outer peripheral face of inner circumferential surface and bearing fits;
The 4th step: roller heat treatment, roller to be put into baking oven heat-treat, temperature is 120 ℃, the time is 15 hours.
Embodiment four
The first step: injection moulding roller outer ring, with polyurethane material (thermoplastic polyurethane) the injection mo(u)lding roller outer ring of shore hardness 93A, the central protrusion of inner circumferential surface, both sides are provided with shoulder, its cross-sectional plane inner periphery is " protruding " shape, and the middle part of outer peripheral face is provided with annular channel;
Second step: bearing surface cleaning, coating adhesive, be stained with the acetone wiping with gentle cloth, use the trichoroethylen wiping again after, dry; With brush at bearing surface scumbling one deck Kai Muluoke 218, after room temperature is parked 30 minutes, scumbling one deck Kai Muluoke 213 again;
The 3rd goes on foot: the injection moulding wheel hub: bearing is placed in the baking oven heat-treats, temperature is 100 ℃, time is 45 minutes, take out bearing then, (use Oven heating with the outer ring after the heating, 100 ℃, 60 minutes) put into injection mould together, the shore hardness 70D polyurethane material that reinjects makes wheel hub, the cross-sectional plane of wheel hub outer peripheral face is " recessed " shape, corresponding with outer ring inner peripheral surface shape, the inner circumferential surface both sides are provided with flange and the upper and lower end face of bearing is fitted respectively, and the outer peripheral face of inner circumferential surface and bearing fits;
The 4th step: roller heat treatment, roller to be put into baking oven heat-treat, temperature is 100 ℃, the time is 20 hours.
Embodiment five
The first step: injection moulding roller outer ring, with polyurethane material (thermoplastic polyurethane) the injection mo(u)lding roller outer ring of shore hardness 95A, the central protrusion of inner circumferential surface, both sides are provided with shoulder, its cross-sectional plane inner periphery is " protruding " shape, and the middle part of outer peripheral face is provided with annular channel;
Second step: bearing surface cleaning, coating adhesive, be stained with the acetone wiping with gentle cloth, use the trichoroethylen wiping again after, dry; With brush at bearing surface scumbling one deck Kai Muluoke 218, after room temperature is parked 40 minutes, scumbling one deck Kai Muluoke 213 again;
The 3rd step: injection moulding wheel hub, bearing is placed in the baking oven heat-treats, temperature is 120 ℃, time is 40 minutes, take out bearing then, (use Oven heating with the outer ring after the heating, 120 ℃, 45 minutes) put into injection mould together, the shore hardness 75D polyurethane material that reinjects makes wheel hub, and the cross-sectional plane of wheel hub outer peripheral face is " recessed " shape, and is corresponding with outer ring inner peripheral surface shape, the inner circumferential surface both sides are provided with flange and the upper and lower end face of bearing is fitted respectively, and the outer peripheral face of inner circumferential surface and bearing fits;
The 4th step: roller heat treatment, roller to be put into baking oven heat-treat, temperature is 100 ℃, the time is 20 hours.
Embodiment six
The first step: injection moulding roller outer ring, with polyurethane material (thermoplastic polyurethane) the injection mo(u)lding roller outer ring of shore hardness 95A, the central protrusion of inner circumferential surface, both sides are provided with shoulder, its cross-sectional plane inner periphery is " protruding " shape, and the middle part of outer peripheral face is provided with annular channel;
Second step: bearing surface cleaning, be stained with the acetone wiping with gentle cloth, use the trichoroethylen wiping again after, dry;
The 3rd step: injection moulding wheel hub, bearing is placed in the baking oven heat-treats, temperature is 120 ℃, time is 40 minutes, take out bearing then, (use Oven heating with the outer ring after the heating, 120 ℃, 30 minutes) put into injection mould together, the shore hardness 75D polyurethane material that reinjects makes wheel hub, and the cross-sectional plane of wheel hub outer peripheral face is " recessed " shape, and is corresponding with outer ring inner peripheral surface shape, the inner circumferential surface both sides are provided with flange and the upper and lower end face of bearing is fitted respectively, and the outer peripheral face groove of inner circumferential surface and bearing is closely chimeric.
As mentioned above, can realize the present invention preferably.
Claims (10)
1. a polyurethane roller comprises outer ring, wheel hub composition, the inner peripheral surface of described wheel hub is fixed with bearing, it is characterized in that, between the inner peripheral surface of described outer ring and the outer peripheral face of wheel hub by concaveconvex structure engagement and bonding mutually, the polyurethane material of shore hardness 90～95A is adopted in described outer ring, and described wheel hub adopts the polyurethane material of shore hardness 60～75D.
2. according to the described a kind of polyurethane roller of claim 1, it is characterized in that described polyurethane material comprises thermoplastic polyurethane.
3. according to the described a kind of polyurethane roller of claim 1, it is characterized in that, the central protrusion of described outer ring inner peripheral surface, both sides are provided with shoulder, its cross-sectional plane is " protruding " shape, the cross-sectional plane of described wheel hub outer peripheral face is " recessed " shape, and corresponding with described outer ring inner peripheral surface shape, described outer ring outer peripheral face is provided with annular channel.
4. according to claim 1 or 3 described a kind of polyurethane rollers, it is characterized in that described wheel hub inner peripheral surface both sides are provided with flange, described flange and the upper and lower end face of described bearing are fitted respectively, described bearing outer peripheral face has groove, and the inner peripheral surface of described wheel hub and the outer peripheral face of bearing are fitted.
5. according to claim 1 or 3 described a kind of polyurethane rollers, it is characterized in that described wheel hub is unitary solid structure or the structure that has reinforced rib.
6. the method for making of the described a kind of polyurethane roller of claim 1 is characterized in that, comprises the steps and technological condition:
The first step, the polyurethane material injection mo(u)lding roller outer ring of adopting shore hardness 90～95A, its cross-sectional plane inner periphery is " recessed " shape;
Second step, scumbling adhesive agent behind the cleaning bearing surface;
The 3rd step, after bearing heat treatment, injection mould is put in outer ring after heating, shore hardness 60～75D polyurethane material moulding wheel hub reinjects, bonding mutually between the inner peripheral surface of described outer ring and the outer peripheral face of wheel hub, the cross-sectional plane of wheel hub outer peripheral face is " recessed " shape, and is corresponding with outer ring inner peripheral surface shape, and inner circumferential surface and bearing are fitted.
7. according to the method for making of the described a kind of polyurethane roller of claim 6, it is characterized in that, when described bearing surface coating adhesive, after the 3rd step roller heat-treated that heat-treat condition is 100～150 ℃ of heating 10～20 hours down.
8. according to the method for making of the described a kind of polyurethane roller of claim 6, it is characterized in that described bearing surface is cleared up with acetone, trichoroethylen wiping successively, described adhesive agent comprises Kai Muluoke adhesives 213,218.
9. according to the method for making of the described a kind of polyurethane roller of claim 6, it is characterized in that described bearing heat-treat condition is 100～150 ℃ of following heat treatments 30～45 minutes; Described outer ring heating condition is 100～150 ℃ and heated 30～60 minutes down.
10. according to the method for making of the described a kind of polyurethane roller of claim 6, it is characterized in that described polyurethane material comprises thermoplastic polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410077790XA CN100371233C (en) | 2004-12-30 | 2004-12-30 | Polyurethane rolling wheel and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200410077790XA CN100371233C (en) | 2004-12-30 | 2004-12-30 | Polyurethane rolling wheel and manufacturing method thereof |
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| CN1631758A CN1631758A (en) | 2005-06-29 |
| CN100371233C true CN100371233C (en) | 2008-02-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012032224A1 (en) * | 2010-09-08 | 2012-03-15 | Kone Corporation | People mover |
| US20210364063A1 (en) * | 2017-09-18 | 2021-11-25 | Igus Gmbh | Energy chain comprising rollers |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502484A (en) * | 2002-11-22 | 2004-06-09 | 张新江 | Composite rolling wheel and mfg method thereof |
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2004
- 2004-12-30 CN CNB200410077790XA patent/CN100371233C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502484A (en) * | 2002-11-22 | 2004-06-09 | 张新江 | Composite rolling wheel and mfg method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012032224A1 (en) * | 2010-09-08 | 2012-03-15 | Kone Corporation | People mover |
| US20210364063A1 (en) * | 2017-09-18 | 2021-11-25 | Igus Gmbh | Energy chain comprising rollers |
| US11927245B2 (en) * | 2017-09-18 | 2024-03-12 | Igus Gmbh | Energy chain comprising rollers |
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| Publication number | Publication date |
|---|---|
| CN1631758A (en) | 2005-06-29 |
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