CN101363532B - Composite spinning belt sheave and method for manufacturing same - Google Patents

Composite spinning belt sheave and method for manufacturing same Download PDF

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Publication number
CN101363532B
CN101363532B CN2007100529424A CN200710052942A CN101363532B CN 101363532 B CN101363532 B CN 101363532B CN 2007100529424 A CN2007100529424 A CN 2007100529424A CN 200710052942 A CN200710052942 A CN 200710052942A CN 101363532 B CN101363532 B CN 101363532B
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belt
spinning
vee
pull
stretch
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CN101363532A (en
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张良杰
韦秀萍
徐银胜
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LIUZHOU LONGJIE AUTO FITTINGS CO Ltd
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LIUZHOU LONGJIE AUTO FITTINGS CO Ltd
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Abstract

A composite spinning pulley and the manufacture method thereof relates to a pulley and the preparation method thereof. The pulley consists of a large V-shaped belt slot, a dish-shaped former, a carrying cylinder, a small V-shaped belt slot and an installation plate which are connected with each other in sequence to form an integrity; wherein, one terminal of the large V-shaped belt slot is a large terminal surface of the pulley and the other terminal is connected with an outer annulus of the dish-shaped former with the inner annulus being connected with one terminal of the carrying cylinder; one terminal of the carrying cylinder shrinks inward to form a concave terrace; one side of the small V-shaped belt slot is connected with the concave terrace of the carrying cylinder and the other side is connected with the outer cylinder of the installation plate; the installation plate consists of a dish-shaped plane and a round installation plane which is arranged in the center of the dish-shaped plane and is provided with a center bore; the connections are rounding off; the manufacture method comprises the following processes: continuously drawing, deforming and spinning a cold-reduced sheet, etc. The pulley has the advantages of no easy deformation, low production cost, high dimensional precision, high intensity and beautiful exterior, etc.

Description

Composite spinning belt sheave and manufacture method thereof
Technical field:
The present invention relates to belt pulley and manufacture method thereof in a kind of mechanical transmission component, particularly a kind of composite spinning belt sheave and manufacture method thereof.
Background technique:
The V-shaped groove belt pulley is as important mechanical transmission component, be widely used in automobile, farm machinery, on the various mechanical transmissions such as textile manufacturing machine, wherein, the application of Composite Skin belt wheel also more and more widely, this belt pulley has the unequal V-shaped groove of twice diameter, traditional Composite Skin belt wheel all is to adopt cast blank to make through the method for cutting, this belt pulley not only wall thickness is thicker, integral body is relatively heavier, and in course of working, to remove a large amount of metallic material, wasted material, (sand holes have been arranged because castability is inhomogeneous, pore etc.), so each belt pulley all need carry out Balance Treatment, thereby manufacturing efficiency is low, and cost is higher; At present, along with updating of Composite Skin belt wheel production technology, someone adopts earlier big V-shaped groove, little V-shaped groove processes respectively with the method for spinning, and then they are welded on respectively on the good bearing block of machining (referring to Fig. 3), the belt pulley that this method makes and traditional casting belt wheel compare have in light weight, good product quality, advantages such as beautiful shape, but still there is following shortcoming in it: (1), welding easy deformation: because this product is with good big of spinning, little V-shaped groove is welded on the bearing block respectively, and good big of spinning, little V-shaped groove wall thickness generally only is 1.5~2.5mm, compares easy deformation when therefore welding; (2), because the bearing spider of this product is to adopt mach method processing, still will remove metallic material, so its cost of production is still higher relatively.
Summary of the invention:
The technical problem to be solved in the present invention is: provide a kind of not yielding, composite spinning belt sheave and manufacture method thereof that cost of production is low, to solve the problems referred to above that present Composite Skin belt wheel and manufacture method thereof exist.
The technological scheme that solves the problems of the technologies described above is: a kind of composite spinning belt sheave, it constitutes an integral body for five sections by the big vee-belt groove, dish-shaped former, carrying cylinder, the little vee-belt groove that connect successively and the mounting plate that is positioned at belt pulley small end end face, described big vee-belt groove one end is the large end face of belt pulley, the other end is connected with the excircle of dish-shaped former, and the inner circumference of dish-shaped former is tilted to down and is connected with an end of carrying cylinder towards the big extreme direction of belt pulley; Described carrying cylinder is inwardly shrinking formation one concave station rank near little vee-belt groove end, its endoporus also forms a step hole; Little vee-belt groove is connected with the concave station rank of carrying cylinder on one side, and another side is connected with the cylindrical of mounting plate; Described mounting plate is made of the circular mounting plane middle with being positioned at this dish plane, dish-shaped plane, and a center hole is arranged on the circular mounting plane; Above-mentioned each joint is rounding off and connects.
Another technological scheme of the present invention is: a kind of manufacture method of composite spinning belt sheave, this method are that Cold Rolled Sheet Steel is formed composite spinning belt sheave through continuous drawing, spinning, and it comprises following master operation:
A, blanking: with Cold Rolled Sheet Steel at the circular sheet material of punch press upper punch;
B, continuous drawing: the circular sheet material of blanking gained continuous drawing on pull and stretch equipment is become to have the belt pulley blank that big or small two-stage cylinder, its small end cylindrical have step;
C, shaping: belt pulley blank shaping on pull and stretch equipment of step will be arranged through the big or small two-stage cylinder of having of continuous drawing, its small end cylindrical, make its formation have the belt pulley semi-finished product of dish-shaped former;
D, side cut: with the processing of cutting edge of the belt pulley semi-finished product after the shaping;
E, spinning: refer to the belt pulley semi-finished product through shaping, side cut are spun to big vee-belt groove and little vee-belt groove respectively, obtain the composite spinning belt sheave briquetting roller;
F, machining: will on lathe, carry out machining through the belt pulley after the spinning, the cylindrical of the interior step hole of railway carriage belt wheel carrying cylinder and the big vee-belt groove of car and the cylindrical of the little vee-belt groove of car;
G, punching: the center hole of belt pulley being gone out mounting plate on punch press;
H: surface treatment: belt pulley is carried out surface treatment, obtain the composite spinning belt sheave of finished product.
The key step of described continuous drawing operation comprises:
A, pull and stretch I: the circular sheet material of blanking gained is made pull and stretch for the first time on pull and stretch equipment, make it form the cylinder type workpiece;
B, pull and stretch II: cylinder type workpiece pull and stretch on pull and stretch equipment of pull and stretch one-tenth becomes the blank of big or small two-stage cylinder type for the first time;
C, pull and stretch III: will its end diameter be diminished through blank small end further pull and stretch on pull and stretch equipment of the pull and stretch gained second time;
D, pull and stretch IV: will carry out pull and stretch through pull and stretch equipment again through the blank small end of pull and stretch for the third time, its end diameter is further diminished;
E, pull and stretch V: again through pull and stretch equipment pull and stretch, make the small end cylindrical form a step blank small end, thereby obtain having big or small two-stage cylinder, belt pulley blank that its small end cylindrical has step.
The key step of described spinning operation comprises:
(a), will comprise that the spinning mould of upper die and lower die, spinning wheel are installed on the spinning machine respectively;
(b), will be installed on the counterdie of spinning mould through the belt pulley semi-finished product of cutting edge, and this workpiece is clamped;
(c), big vee-belt groove of spinning and little vee-belt groove;
(e), the composite spinning belt sheave briquetting roller that makes is unloaded from the spinning mould.
The present invention's composite spinning belt sheave and manufacture method thereof are compared with existing Composite Skin belt wheel and manufacture method thereof, have following beneficial effect:
1, product is not yielding, the quality height:
Because the present invention's composite spinning belt sheave fuses big vee-belt groove, little vee-belt groove and carrying cylinder by multiple tracks pull and stretch, spinning operation, avoided because the distortion that welding causes, and have higher surface finishment and surface hardness by the race of this belt pulley behind the rotary press modelling, therefore, its quality of product is higher.
2, cost of production is low:
Because the present invention's composite spinning belt sheave is to form with Cold Rolled Sheet Steel carries out rotary press modelling again behind the multiple tracks pull and stretch method manufacturing, whole course of working need not be removed metallic material, not only conditions of manufacture is good, saved material, nor need carry out Balance Treatment, thereby the manufacturing efficiency height, cost of production is lower.
3, product size precision height:
Because in the manufacture method of the present invention's composite spinning belt sheave, big vee-belt groove and little vee-belt groove are to form like this: the big vee-belt groove of first spinning, the interior step hole of pre-railway carriage belt wheel carrying cylinder is located the little vee-belt groove of spinning with the interior step hole of carrying cylinder at last more then; This processing method can guarantee the dimension precision requirement between the large and small V-shaped groove, so this dimensional accuracy of products height.
4, intensity is good, the profile better appearance:
Because the present invention's composite spinning belt sheave is in the joint of big vee-belt groove and dish-shaped former, all have stiffening rib in the joint of little vee-belt groove and mounting plate, increased wall thickness in the corner joint, that has avoided being easy to generate because of corner is excessive loses, thereby its intensity is better, and, be rounding off in each section joint of this belt pulley and connect, so this belt pulley profile better appearance.
Below, in conjunction with the accompanying drawings and embodiments the present invention's the composite spinning belt sheave and the technical characteristics of manufacture method thereof are further described.
Description of drawings:
Fig. 1: the structural representation of embodiment one described the present invention's composite spinning belt sheave;
Fig. 2: the structural representation after embodiment one described the present invention's composite spinning belt sheave welds reinforcing washer and installs bearing additional;
Fig. 3: the structural representation of present composite spinning belt sheave;
Fig. 4: in embodiment's two described composite spinning belt sheave manufacture methodes, the structural representation of pull and stretch I gained cylinder type workpiece;
Fig. 5: in embodiment's two described composite spinning belt sheave manufacture methodes, the structural representation of pull and stretch II gained blank;
Fig. 6: in embodiment's two described composite spinning belt sheave manufacture methodes, the structural representation of pull and stretch III gained blank;
Fig. 7: in embodiment's two described composite spinning belt sheave manufacture methodes, the structural representation of pull and stretch IV gained blank;
Fig. 8: in embodiment's two described composite spinning belt sheave manufacture methodes, pull and stretch V gained has the belt pulley blahk structure schematic representation that big or small two-stage cylinder, its small end cylindrical have step;
Fig. 9: the half-finished structural representation of trimming gained belt pulley in embodiment's two described composite spinning belt sheave manufacture methodes;
Figure 10: in embodiment's two described composite spinning belt sheave manufacture methodes, the structural representation of spinning operation gained belt pulley briquetting roller;
Figure 11: the flow figure of embodiment's two described composite spinning belt sheave manufacture methodes;
Figure 12: continuous deep-drawing technique flow chart.
Among the figure:
1-big vee-belt groove, one end of 11-big vee-belt groove, 2-dish-shaped former, 21-excircle, 22-inner circumference, 3-carrying cylinder, 31-concave station rank, 32-interior step hole, 4-little vee-belt groove, 5-mounting plate, 51-dish-shaped plane, 52-circular mounting plane, 521-center hole, the stiffening rib of 6-big vee-belt groove and dish-shaped former joint, the stiffening rib of 7-little vee-belt groove and mounting plate joint, 8-reinforcing washer, 9-bearing, 10-composite spinning belt sheave, 101-a big or small two-stage cylinder had, its small end cylindrical has the belt pulley blank of step, 102-composite spinning belt sheave semi-finished product; The briquetting roller of 103-composite spinning belt sheave.
Embodiment:
Embodiment one:
A kind of composite spinning belt sheave 10, it constitutes an integral body for 5 five sections by the big vee-belt groove 1, dish-shaped former 2, carrying cylinder 3, the little vee-belt groove 4 that connect successively and the mounting plate that is positioned at belt pulley small end end face, described big vee-belt groove one end 11 is the large end face of belt pulley, the other end is connected with the excircle 21 of dish-shaped former 2, and the inner circumference 22 of dish-shaped former 2 is tilted to down and is connected with an end of carrying cylinder 3 towards the big extreme direction of belt pulley; Described carrying cylinder 3 is inwardly shrinking formation one concave station rank 31 near little vee-belt groove end, thereby its endoporus also forms a step hole 32; Little vee-belt groove 4 is connected with the concave station rank 31 of carrying cylinder on one side, and another side is connected with the cylindrical of mounting plate 5; Described mounting plate 5 is made of the circular mounting plane 52 middle with being positioned at this dish plane, dish-shaped plane 51, and a square center hole 521 is arranged on the circular mounting plane 52; Above-mentioned each joint is rounding off and connects (referring to Fig. 1).
Above-mentioned big vee-belt groove outer diameter D with the span of the ratio D/d of little vee-belt groove outside diameter d is: 1≤D/d≤3.
Described big vee-belt groove 1 has the ring stiffening rib 6 that becomes one with belt pulley with the joint of dish-shaped former 2, and little vee-belt groove 4 has the ring stiffening rib 7 that becomes one with belt pulley with mounting plate 5 joints.
As a kind of conversion of present embodiment, described big vee-belt groove 1 can not have stiffening rib with the joint of dish-shaped former 2, little vee-belt groove 4 with mounting plate 5 joints yet.
As another conversion of present embodiment, the shape of the center hole 521 of described mounting plate 5 also can be circular or other shape.
As another conversion of present embodiment, reinforcing washer 8 also can be welded in described mounting plate 5 inboards.
When the present invention's composite spinning belt sheave carries out carry-over moment with axle, bearing 9 (referring to Fig. 2) need be installed on the interior step hole 32 of carrying cylinder 3.
Embodiment two:
A kind of manufacture method of composite spinning belt sheave, this method are that Cold Rolled Sheet Steel is formed composite spinning belt sheave through continuous drawing, spinning, and it comprises following master operation:
A, blanking: with Cold Rolled Sheet Steel at the circular sheet material of punch press upper punch;
B, continuous drawing: with circular sheet material continuous drawing on oil hydraulic press of blanking gained, become to have big or small two-stage cylinder, belt pulley blank 101 that its small end cylindrical has step is (referring to Fig. 4~Fig. 8);
C, shaping: will have belt pulley blank 101 shaping on oil hydraulic press that big or small two-stage cylinder, its small end cylindrical have step through continuous drawing, and make its formation have the belt pulley semi-finished product 102 (referring to Fig. 9) of dish-shaped former;
D, side cut: with the processing of cutting edge of the belt pulley semi-finished product after the shaping;
E, spinning: refer to the belt pulley semi-finished product through shaping, side cut are spun to big vee-belt groove and little vee-belt groove respectively, obtain composite spinning belt sheave briquetting roller 103 (referring to Figure 10);
F, machining: will on lathe, carry out machining through the belt pulley after the spinning, the cylindrical of the interior step hole of railway carriage belt wheel carrying cylinder and the big vee-belt groove of car and the cylindrical of the little vee-belt groove of car;
G, punching: the center hole of belt pulley being gone out mounting plate on punch press;
H: surface treatment: belt pulley is carried out surface treatment, obtain the composite spinning belt sheave of finished product.
The key step of described continuous drawing operation comprises:
A, pull and stretch I: the circular sheet material of blanking gained is made pull and stretch for the first time on oil hydraulic press, make it form cylinder type workpiece (referring to Fig. 4);
B, pull and stretch II: cylinder type workpiece pull and stretch on oil hydraulic press of pull and stretch one-tenth becomes the blank (referring to Fig. 5) of big or small dual stage cylindrical for the first time;
C, pull and stretch III: will be through blank small end further pull and stretch on oil hydraulic press of the pull and stretch gained second time, make its end diameter diminish (referring to Fig. 6);
D, pull and stretch IV: will carry out pull and stretch through oil hydraulic press again through the blank small end of pull and stretch for the third time, and make its end diameter further diminish (referring to Fig. 7);
E, pull and stretch V: again through the oil hydraulic press pull and stretch, make the small end cylindrical form a step blank small end, thereby obtain having big or small two-stage cylinder, belt pulley blank 101 (referring to Fig. 8) that its small end cylindrical has step.
The key step of described spinning operation comprises:
(a), will comprise that the spinning mould of upper die and lower die, spinning wheel are installed on the spinning machine respectively;
(b), will be installed on the counterdie of spinning mould through the belt pulley semi-finished product of cutting edge, and this workpiece is clamped;
(c), big vee-belt groove of spinning and little vee-belt groove: the big vee-belt groove of first spinning, then these belt pulley semi-finished product are taken out from spinning machine, and with its clamping on lathe, the interior step hole of pre-railway carriage belt wheel carrying cylinder, again these belt pulley semi-finished product are installed on the spinning machine at last, and with the interior step hole location of belt pulley carrying cylinder, the little vee-belt groove of spinning;
(e), the composite spinning belt sheave briquetting roller 103 that makes is unloaded from the spinning mould.
As a kind of conversion of present embodiment two, the oil hydraulic press described in the described continuous drawing operation also can be pull and stretch machine or other pull and stretch equipment.
Another conversion as present embodiment two, in described spinning process (c), " big vee-belt groove of spinning and the little vee-belt groove ", behind the intact big vee-belt groove of spinning, the also not interior step hole of pre-railway carriage belt wheel carrying cylinder, the directly little vee-belt groove of spinning; Also can be the little vee-belt groove of first spinning, the direct then big vee-belt groove of spinning; Or simultaneously big vee-belt groove and little vee-belt groove are carried out spinning.
A kind of conversion as the embodiment of the invention two, the manufacture method of the briquetting roller in the manufacture method of described composite spinning belt sheave also is applicable to other the big vee-belt groove outer diameter D and the manufacturing of the bigger Composite Skin belt wheel briquetting roller of little vee-belt groove outside diameter d difference, its follow-up F, machining, G, punching, H: surface treatment procedure is conventional method, concrete structure according to the composite spinning belt sheave of making is decided, can increase and decrease, also can also have other processing method, repeat no more herein.

Claims (10)

1. composite spinning belt sheave, it is characterized in that: it is by big vee-belt groove (1), dish-shaped former (2), carrying cylinder (3), the little vee-belt groove (4) of connection successively and the integral body of (5) five sections formations of mounting plate that is positioned at belt pulley small end end face, described big vee-belt groove one end (11) is the large end face of belt pulley, the other end is connected with the excircle (21) of dish-shaped former (2), and the inner circumference (22) of dish-shaped former (2) is tilted to down and is connected with an end of carrying cylinder (3) towards the big extreme direction of belt pulley; Described carrying cylinder (3) is inwardly shrinking formation one concave station rank (31) near little vee-belt groove end, its endoporus also forms a step hole (32); Little vee-belt groove (4) is connected with the concave station rank (31) of carrying cylinder on one side, and another side is connected with the cylindrical of mounting plate (5); Described mounting plate (5) is by dish-shaped plane (51) and be positioned at middle circular mounting plane (52) formation in this dish plane, and a center hole (521) is arranged on circular mounting plane (52); Above-mentioned each joint is rounding off and connects.
2. composite spinning belt sheave according to claim 1 is characterized in that: described big vee-belt groove outer diameter D with the span of the ratio D/d of little vee-belt groove outside diameter d is: 1≤D/d≤3.
3. composite spinning belt sheave according to claim 1 and 2 is characterized in that: described big vee-belt groove (1) has stiffening rib (6) with the joint of dish-shaped former (2).
4. composite spinning belt sheave according to claim 1 and 2 is characterized in that: described little vee-belt groove (4) has stiffening rib (7) with mounting plate (5) joint.
5. composite spinning belt sheave according to claim 3 is characterized in that: described little vee-belt groove (4) has stiffening rib (7) with mounting plate (5) joint.
6. the manufacture method of composite spinning belt sheave according to claim 1 is characterized in that: this method is that Cold Rolled Sheet Steel is formed composite spinning belt sheave through continuous drawing, spinning, and it comprises following master operation:
A, blanking: with Cold Rolled Sheet Steel at the circular sheet material of punch press upper punch;
B, continuous drawing: the circular sheet material of blanking gained continuous drawing on pull and stretch equipment is become to have the belt pulley blank that big or small two-stage cylinder, its small end cylindrical have step;
C, shaping: belt pulley blank shaping on pull and stretch equipment of step will be arranged through the big or small two-stage cylinder of having of continuous drawing, its small end cylindrical, make its formation have the belt pulley semi-finished product of dish-shaped former;
D, side cut: with the processing of cutting edge of the belt pulley semi-finished product after the shaping;
E, spinning: refer to the belt pulley semi-finished product through shaping, side cut are spun to big vee-belt groove and little vee-belt groove respectively, obtain the composite spinning belt sheave briquetting roller;
F, machining: will on lathe, carry out machining through the belt pulley after the spinning, the cylindrical of the interior step hole of railway carriage belt wheel carrying cylinder and the big vee-belt groove of car and the cylindrical of the little vee-belt groove of car;
G, punching: the center hole of belt pulley being gone out mounting plate on punch press;
H, surface treatment: belt pulley is carried out surface treatment, obtain the composite spinning belt sheave of finished product.
7. the manufacture method of composite spinning belt sheave according to claim 6, it is characterized in that: the key step of described continuous drawing operation comprises:
A, pull and stretch I: the circular sheet material of blanking gained is made pull and stretch for the first time on pull and stretch equipment, make it form the cylinder type workpiece;
B, pull and stretch II: cylinder type workpiece pull and stretch on pull and stretch equipment of pull and stretch one-tenth becomes the blank of big or small two-stage cylinder type for the first time;
C, pull and stretch III: will its end diameter be diminished through blank small end further pull and stretch on pull and stretch equipment of the pull and stretch gained second time;
D, pull and stretch IV: will carry out pull and stretch through pull and stretch equipment again through the blank small end of pull and stretch for the third time, its end diameter is further diminished;
E, pull and stretch V: again through pull and stretch equipment pull and stretch, make the small end cylindrical form a step blank small end, thereby obtain having big or small two-stage cylinder, belt pulley blank that its small end cylindrical has step.
8. according to the manufacture method of claim 6 or 7 described composite spinning belt sheaves, it is characterized in that: the key step of described spinning operation comprises:
(a), will comprise that the spinning mould of upper die and lower die, spinning wheel are installed on the spinning machine respectively;
(b), will be installed on the counterdie of spinning mould through the belt pulley semi-finished product of cutting edge, and this workpiece is clamped;
(c), big vee-belt groove of spinning and little vee-belt groove;
(e), the composite spinning belt sheave briquetting roller that makes is unloaded from the spinning mould.
9. the manufacture method of composite spinning belt sheave according to claim 8, it is characterized in that: in described step (c), " big vee-belt groove of spinning and little vee-belt groove " operation, the method that adopts is: the half-finished large cylinder end of first spinning belt pulley forms big vee-belt groove, the interior step hole of pre-then railway carriage belt wheel carrying cylinder, the last half-finished little cylinder end of spinning belt pulley forms little vee-belt groove.
10. the manufacture method of composite spinning belt sheave according to claim 8, it is characterized in that: in described step (c), " big vee-belt groove of spinning and little vee-belt groove " operation, the method for employing is: or the half-finished large cylinder end of first spinning belt pulley forms big vee-belt groove, back its little cylinder end of spinning forms little vee-belt groove; Or the half-finished little cylinder end of first spinning belt pulley forms little vee-belt groove, its large cylinder end of spinning forms big vee-belt groove then; Or the half-finished big or small cylinder end of belt pulley is carried out spinning simultaneously forms big vee-belt groove and little vee-belt groove.
CN2007100529424A 2007-08-07 2007-08-07 Composite spinning belt sheave and method for manufacturing same Active CN101363532B (en)

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Application Number Priority Date Filing Date Title
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CN101363532B true CN101363532B (en) 2010-12-15

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102155529A (en) * 2011-04-22 2011-08-17 柳州市龙杰汽车配件有限责任公司 Crease-free belt pulley and forming method thereof
CN102152089B (en) * 2011-04-22 2013-01-23 柳州市龙杰汽车配件有限责任公司 Molding method of large-difference variable-diameter spinning pulley
CN103071975B (en) * 2012-12-31 2015-11-18 广东港润机电科技有限公司 A kind of processing method of clutch pulley
CN108916360A (en) * 2018-09-28 2018-11-30 浙江东星汽车部件有限公司 A kind of not isometrical single slot belt pulley of abnormity and its manufacturing method
CN112065954A (en) * 2019-09-27 2020-12-11 东风襄阳旋压技术有限公司 Composite large V multi-wedge plate belt pulley and forming method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2172375Y (en) * 1993-02-12 1994-07-20 祁天德 Stepless speed-changing belt pulley for motorcycle
CN1524168A (en) * 2001-07-06 2004-08-25 �Ǵĺ�˾ Fan idler pulley
CN201093053Y (en) * 2007-08-07 2008-07-30 柳州市龙杰汽车配件有限责任公司 Composite spinning belt roller

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2172375Y (en) * 1993-02-12 1994-07-20 祁天德 Stepless speed-changing belt pulley for motorcycle
CN1524168A (en) * 2001-07-06 2004-08-25 �Ǵĺ�˾ Fan idler pulley
CN201093053Y (en) * 2007-08-07 2008-07-30 柳州市龙杰汽车配件有限责任公司 Composite spinning belt roller

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