CN110145561A - A kind of multistage power plane scroll spring and its processing unit (plant) and processing method - Google Patents

A kind of multistage power plane scroll spring and its processing unit (plant) and processing method Download PDF

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Publication number
CN110145561A
CN110145561A CN201910501278.XA CN201910501278A CN110145561A CN 110145561 A CN110145561 A CN 110145561A CN 201910501278 A CN201910501278 A CN 201910501278A CN 110145561 A CN110145561 A CN 110145561A
Authority
CN
China
Prior art keywords
scroll spring
cam
central spindle
steel disc
molding cutter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910501278.XA
Other languages
Chinese (zh)
Inventor
张荣生
黄屹立
李晶
褚村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuliwang Precision Electromechanical (chinese) Ltd By Share Ltd
Original Assignee
Fuliwang Precision Electromechanical (chinese) Ltd By Share Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuliwang Precision Electromechanical (chinese) Ltd By Share Ltd filed Critical Fuliwang Precision Electromechanical (chinese) Ltd By Share Ltd
Priority to CN201910501278.XA priority Critical patent/CN110145561A/en
Publication of CN110145561A publication Critical patent/CN110145561A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F35/00Making springs from wire
    • B21F35/04Making flat springs, e.g. sinus springs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00Springs
    • F16F1/02Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04Wound springs
    • F16F1/10Spiral springs with turns lying substantially in plane surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H53/00Cams ; Non-rotary cams; or cam-followers, e.g. rollers for gearing mechanisms
    • F16H53/02Single-track cams for single-revolution cycles; Camshafts with such cams

Abstract

The invention discloses a kind of multistage power plane scroll spring and its processing unit (plant) and processing methods, central spindle including cam pack, molding cutter and output steel disc to be processed is adjusted, described crank arm connects with installation board shaft, described one end cranked arm is connect with molding cutter, the other end cranked arm is abutted with first cam, the adjustable cam pack drives molding cutter close or far from the central spindle, the central spindle exports steel disc to be processed, and the molding cutter abuts steel disc so that steel disc is twisted into multistage power scroll spring;During the scroll spring coiling of same section of power, the molding cutter and mandrel are apart from constant, and during the scroll spring coiling of different sections of power, the molding cutter changes at a distance from mandrel.It, which can be processed, obtains multistage power scroll spring, and work efficiency is high, convenient and efficient.

Description

A kind of multistage power plane scroll spring and its processing unit (plant) and processing method
Technical field
The present invention relates to scroll spring technical fields, and in particular to a kind of multistage power plane scroll spring and its processing unit (plant) With processing method.
Background technique
Plane scroll spring also known as clockwork spring, one end are fixed, and other end effect has torque, under torque effect, spring Generate flexible deformation.Traditional plane scroll spring, mostly outer ring radius of curvature is larger, and inner ring radius of curvature is smaller, and curvature Radius is bigger, the torque provided with regard to smaller, so, traditional plane scroll spring, outer ring torque is smaller, and inner ring torque is larger.
Traditional scroll spring, can only provide two sections of power application ranges is restricted.When user needs multistage power, need pair Multiple scroll springs are welded, or multiple scrollwork springs are attached to use with other modes such as gear sets, the former increases Production stage, latter increases cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of multistage power plane scroll spring and its processing unit (plant) and processing Method can process and obtain multistage power scroll spring, and work efficiency is high, convenient and efficient.
In order to solve the above-mentioned technical problems, the present invention provides a kind of adjustable cam packs, including the first cam, drive It dynamic source and cranks arm, the driving source drives the rotation of the first cam, and first cam is abutted with cranking arm, and first cam includes The outer edge curvature that the first cam is adjusted on the cam bit is arranged in cam bit and multiple adjusting blocks, the adjusting block.
Preferably, offering mounting hole, the tune on the adjusting block through groove body is offered on the cam bit Locking nub and the cam bit are locked by locking piece, and the locking piece passes through mounting hole and groove body for adjusting block and cam mortice lock Gu.
The present invention provides a kind of processing unit (plant) of multistage power plane scroll spring, including it is described in claim 1 adjustable Cam pack is saved, further includes the central spindle of mounting plate, molding cutter and output steel disc to be processed, it is described to crank arm and the installation board shaft Even, described one end cranked arm is connect with molding cutter, and the other end cranked arm is abutted with first cam, described adjustable Cam pack drives molding cutter close or far from the central spindle.
Preferably, the front end of the molding cutter is provided with shaping roller.
Preferably, the cam bit is circle, the edge setting of the circular cam bit is jagged.
Preferably, the discharge port of the central spindle is provided with roller, the roller is located at the steel disc of central spindle output The side that twists.
It is described the present invention provides a kind of processing method of multistage power plane scroll spring, including molding cutter and central spindle Central spindle exports steel disc to be processed, and the molding cutter abuts steel disc so that steel disc is twisted into multistage power scroll spring;Same During the scroll spring coiling of Duan Li, the molding cutter and mandrel are apart from constant, in the scroll spring coiling of different sections of power In the process, the molding cutter changes at a distance from mandrel.
The present invention provides a kind of processing methods of multistage power plane scroll spring, based on above-mentioned multistage power plane scroll The processing unit (plant) of spring, which comprises the following steps:
S1, three adjustment sheets are installed on the cam bit, three adjustment sheets are followed successively by the first adjustment sheet, the second adjustment sheet With third adjustment sheet;
S2, the first cam turn to the first adjustment sheet and contact with cranking arm, and the distance between molding cutter and central spindle are at this time First distance, the central spindle export steel disc, and the molding cutter abuts steel disc to obtain first segment scroll spring, later the axis Core stops output steel disc;
S2, the first cam turn to the second adjustment sheet and contact with cranking arm, and the distance between molding cutter and central spindle are at this time Second distance, the central spindle export steel disc, and the molding cutter abuts steel disc to obtain second segment scroll spring, later the axis Core stops output steel disc;
S3, the first cam turn to third adjustment sheet and contact with cranking arm, and the distance between molding cutter and central spindle are at this time Third distance, the central spindle export steel disc, and the molding cutter abuts steel disc to obtain third section scroll spring, later the axis Core stops output steel disc;
S4, the first cam rotate so that molding cutter is far from central spindle;
Wherein, the first distance is not equal to second distance, and the second distance is not equal to third distance.
Beneficial effects of the present invention:
1, the present invention in multistage power plane scroll spring processing unit (plant), by change molding cutter at a distance from mandrel, It can process and obtain multistage power scroll spring, work efficiency is high, convenient and efficient.
2, the processing method of multistage power plane scroll spring is simple in the present invention, eliminates the work for welding multistage spring Sequence, it is economical and practical.
3, the present invention provides a kind of plane scroll spring of multistage power, can be applicable to the occasion of a variety of variable forcees, such as Toy elevator, toy overhead door, roller shutter etc. can wind different multistage power scroll springs according to actual needs, save The component that gear connects spring also eliminates the process for welding multistage spring, economical and practical.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the first cam;
Fig. 2 is the structural schematic diagram of the processing unit (plant) of multistage power plane scroll spring in the present invention;
Fig. 3 is the structural schematic diagram of multistage power plane scroll spring;
Fig. 4 is the variable diameter figure of multistage power plane scroll spring.
Figure label explanation: 10, cam bit;101, groove body;11, the first adjusting block;111, mounting hole;12, it second adjusts Block;13, third adjusting block;14, notch;20, the first cam;21, vehicle cam is moved back;30, it cranks arm;31, mounting plate;40, forming cutter Tool;50, central spindle;60, first segment scroll spring;61, second segment scroll spring;62, third section scroll spring.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, so that those skilled in the art can be with It more fully understands the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
In one embodiment, shown in referring to Fig.1, the invention discloses a kind of mostly adjustable cam packs, including first Cam 20, driving source and crank arm 30, driving source drives the rotation of the first cam 20, and the first cam 20 30 is abutted with cranking arm, driving source It can be selected motor, motor drives the rotation of the first cam 20, and the edge of the first cam 20 30 is abutted with cranking arm, and cranks arm 30 convex first It is moved under the action of wheel 20.First cam 20 include cam bit 10 and multiple adjusting blocks, adjusting block be arranged on cam bit 10 with Adjust the outer edge curvature of the first cam 20.Adjusting block covers the edge of cam bit 10, thus in cam bit 10 and adjusting block Compound action under, obtain anisotropic adjustable first cam 20 in edge.
Specifically, through offering groove body 101 on cam bit 10, offer mounting hole 111 on adjusting block, adjusting block with Cam bit 10 is locked by locking piece, and locking piece is locked adjusting block and cam bit 10 with groove body 101 by mounting hole 111.Lock Determining part is bolts and nuts, can be fixed by adjusting block and cam bit 10 by bolts and nuts.Also, groove body 101 may be configured as Strip, such as kidney slot so facilitate the position for changing fixed adjusting block.
In this way, the position of changeable adjusting block, and it is fixed, so that the use scope of the cam pack is wider, shape It is more changeable.
In another embodiment, referring to shown in Fig. 2, the invention discloses a kind of processing of multistage power plane scroll spring dresses It sets, further includes the central spindle of mounting plate 31, molding cutter 40 and output steel disc to be processed including above-mentioned adjustable cam pack 50.Crank arm and 30 connect with 31 axis of mounting plate, 30 one end of cranking arm is connect with molding cutter 40, crank arm 30 the other end and the first cam 20 abut, and cam pack is adjusted and drives molding cutter 40 close or far from central spindle 50.
The front end of molding cutter 40 is provided with shaping roller.Shaping roller abuts the steel disc that central spindle 50 exports, to realize The bending of steel disc, shaping roller can reduce friction, so that the brake forming of scroll spring is more smooth.Cam bit 10 is circle Shape, the edge setting jagged 14 of circular cam bit 10.Circular cam bit 10 can reduce the time of withdrawing, thus Improve working efficiency.
The discharge port of central spindle 50 is provided with roller, roller is located at the side that twists of the steel disc of the output of central spindle 50.Due to steel Piece is to be bent at scroll spring, and the cambered surface of roller is suitable for the bending of the various radians of steel disc, and roller can reduce steel disc with The friction of central spindle 50.When steel disc is rolled up, sliding friction becomes rolling friction, extends the service life of the mold, reduces steel disc table The scuffing in face.Central spindle 50 is arranged on mold.
In another embodiment, the invention discloses a kind of processing methods of multistage power plane scroll spring, based on above-mentioned Multistage power plane scroll spring processing unit (plant), comprising the following steps:
S1, on cam bit 10 install three adjustment sheets, three adjustment sheets be followed successively by the first adjustment sheet, the second adjustment sheet and Third adjustment sheet;
S2, the first cam 20 turn to the first adjustment sheet and 30 contact with cranking arm, at this time between molding cutter 40 and central spindle 50 Distance be first distance, central spindle 50 export steel disc, molding cutter 40 abut steel disc to obtain first segment scroll spring 60, later Central spindle 50 stops output steel disc;
S2, the first cam 20 turn to the second adjustment sheet and 30 contact with cranking arm, at this time between molding cutter 40 and central spindle 50 Distance be second distance, central spindle 50 export steel disc, molding cutter 40 abut steel disc to obtain second segment scroll spring 61, later Central spindle 50 stops output steel disc;
S3, the first cam 20 turn to third adjustment sheet and 30 contact with cranking arm, at this time between molding cutter 40 and central spindle 50 Distance be third distance, central spindle 50 export steel disc, molding cutter 40 abut steel disc to obtain third section scroll spring 62, later Central spindle 50 stops output steel disc;
S4, the first cam 20 rotate so that molding cutter 40 is far from central spindle 50;In the present invention, adjustable cam pack may be used also Including moving back vehicle cam 21, it is synchronous with the movement of the first cam 20 to move back vehicle cam 21, when move back the abutting of vehicle cam 21 crank arm 30 when, at Type cutter 40 is far from central spindle 50;Common process can be used to cut off the multistage power scroll spring processed later.
Wherein, first distance is not equal to second distance, and second distance is not equal to third distance.In this way, by aforesaid operations, It can be obtained three sections of power scroll springs.
In another embodiment, the invention discloses a kind of processing methods of multistage power plane scroll spring, including molding Cutter 40 and central spindle 50, central spindle 50 export steel disc to be processed, and molding cutter 40 abuts steel disc so that steel disc is twisted into multistage power Scroll spring;During the scroll spring coiling of same section of power, molding cutter 40 and mandrel are apart from constant, in different sections of power During scroll spring coiling, molding cutter 40 changes at a distance from mandrel.
As shown in figure 3, the structural schematic diagram of the multistage power scroll spring obtained for the present invention.The both ends of the spring are distinguished Along its axial tension, the variable diameter figure of multistage power scroll spring as shown in Figure 4 is obtained.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention It encloses without being limited thereto.Those skilled in the art's made equivalent substitute or transformation on the basis of the present invention, in the present invention Protection scope within.Protection scope of the present invention is subject to claims.

Claims (9)

1. a kind of adjustable cam pack, which is characterized in that including the first cam, driving source and crank arm, the driving source is driven Dynamic first cam rotation, first cam are abutted with cranking arm, and first cam includes cam bit and multiple adjusting blocks, described The outer edge curvature that the first cam is adjusted on the cam bit is arranged in adjusting block.
2. adjustable cam pack as described in claim 1, which is characterized in that run through on the cam bit and offer slot Body offers mounting hole, the adjusting block and the cam bit on the adjusting block and is locked by locking piece, and the locking piece leads to It crosses mounting hole and groove body adjusting block and cam bit lock.
3. a kind of processing unit (plant) of multistage power plane scroll spring, which is characterized in that including it is described in claim 1 be adjusted it is convex Wheel assembly further includes the central spindle of mounting plate, molding cutter and output steel disc to be processed, and described crank arm connects with the installation board shaft, Described one end cranked arm is connect with molding cutter, and the other end cranked arm is abutted with first cam, it is described be adjusted it is convex Wheel assembly drives molding cutter close or far from the central spindle.
4. the processing unit (plant) of multistage power plane scroll spring as claimed in claim 3, which is characterized in that the molding cutter Front end is provided with shaping roller.
5. the processing unit (plant) of multistage power plane scroll spring as claimed in claim 3, which is characterized in that the cam bit is circle The edge setting of shape, the circular cam bit is jagged.
6. the processing unit (plant) of multistage power plane scroll spring as claimed in claim 3, which is characterized in that the discharging of the central spindle Mouth is provided with roller, and the roller is located at the side that twists of the steel disc of central spindle output.
7. a kind of processing method of multistage power plane scroll spring, which is characterized in that including molding cutter and central spindle, the central spindle Steel disc to be processed is exported, the molding cutter abuts steel disc so that steel disc is twisted into multistage power scroll spring;In same section of power Scroll spring coiling during, the molding cutter and mandrel are apart from constant, in the scroll spring coiling process of different sections of power In, the molding cutter changes at a distance from mandrel.
8. a kind of processing method of multistage power plane scroll spring is based on the described in any item multistage power planes of claim 3-6 The processing unit (plant) of scroll spring, which comprises the following steps:
S1, three adjustment sheets are installed on the cam bit, three adjustment sheets are followed successively by the first adjustment sheet, the second adjustment sheet and the Three adjustment sheets;
S2, the first cam turn to the first adjustment sheet and contact with cranking arm, and the distance between molding cutter and central spindle are first at this time Distance, the central spindle export steel disc, and the molding cutter abuts steel disc to obtain first segment scroll spring, and the central spindle is stopped later Only export steel disc;
S2, the first cam turn to the second adjustment sheet and contact with cranking arm, and the distance between molding cutter and central spindle are second at this time Distance, the central spindle export steel disc, and the molding cutter abuts steel disc to obtain second segment scroll spring, and the central spindle is stopped later Only export steel disc;
S3, the first cam turn to third adjustment sheet and contact with cranking arm, and the distance between molding cutter and central spindle are third at this time Distance, the central spindle export steel disc, and the molding cutter abuts steel disc to obtain third section scroll spring, and the central spindle is stopped later Only export steel disc;
S4, the first cam rotate so that molding cutter is far from central spindle;
Wherein, the first distance is not equal to second distance, and the second distance is not equal to third distance.
9. a kind of multistage power plane scroll spring, which is characterized in that pass through multistage power plane scroll spring as claimed in claim 7 Processing method obtain.
CN201910501278.XA 2019-06-11 2019-06-11 A kind of multistage power plane scroll spring and its processing unit (plant) and processing method Pending CN110145561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910501278.XA CN110145561A (en) 2019-06-11 2019-06-11 A kind of multistage power plane scroll spring and its processing unit (plant) and processing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910501278.XA CN110145561A (en) 2019-06-11 2019-06-11 A kind of multistage power plane scroll spring and its processing unit (plant) and processing method

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Publication Number Publication Date
CN110145561A true CN110145561A (en) 2019-08-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US432301A (en) * 1890-07-15 Jacob cryderman
US975589A (en) * 1909-10-08 1910-11-15 George T Watkins Cam.
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GB818857A (en) * 1957-10-07 1959-08-26 Spuehl Ag Improvements in or relating to coiled springs
GB1020122A (en) * 1963-11-15 1966-02-16 Bennett Tools Ltd Improvements relating to spring coiling machines
US3678970A (en) * 1971-01-11 1972-07-25 Milton H Dammel Looping and hooking machine
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SU599896A1 (en) * 1975-12-25 1978-03-30 Myasyugov Sergej Ya Automatic spring-coiling machine
JPS58112623A (en) * 1981-12-25 1983-07-05 Shinko Kikai Kogyo Kk Adjusting method for spring manufacturing machine
JPS61222647A (en) * 1985-03-28 1986-10-03 Asahi Seiki Kogyo Kk Method and device for producing multilayer coil spring
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CN2749601Y (en) * 2004-12-03 2006-01-04 李德锵 Input material length control cam for mattress spring machine
CN102069135A (en) * 2010-09-25 2011-05-25 浙江美力弹簧有限公司 Flat spiral spring presetting molding machine
CN201940515U (en) * 2010-09-25 2011-08-24 浙江美力科技股份有限公司 Semi-automatic forming machine for plane scroll spring
CN206366627U (en) * 2017-01-11 2017-08-01 东莞市鑫鼎机械设备有限公司 A kind of new eight axles spring manufacturing equipment
CN206366628U (en) * 2017-01-11 2017-08-01 东莞市鑫鼎机械设备有限公司 A kind of eight axle spring forming mechanisms
CN206392773U (en) * 2017-01-11 2017-08-11 东莞市鑫鼎机械设备有限公司 A kind of six axle spring manufacturing equipments
CN206392774U (en) * 2017-01-11 2017-08-11 东莞市鑫鼎机械设备有限公司 A kind of eight axle spring manufacturing equipments
CN206392770U (en) * 2017-01-11 2017-08-11 东莞市鑫鼎机械设备有限公司 Line mechanism is turned in a kind of spring line sending
CN206889541U (en) * 2017-05-27 2018-01-16 雷振邦 The plane scroll spring of curtain driving device
CN207787582U (en) * 2018-01-01 2018-08-31 株洲名扬橡塑有限公司 A kind of novel eight axis springs manufacturing equipment

Patent Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US231188A (en) * 1880-08-17 Adjustable scroll
US432301A (en) * 1890-07-15 Jacob cryderman
US975589A (en) * 1909-10-08 1910-11-15 George T Watkins Cam.
US1145337A (en) * 1913-10-08 1915-07-06 Locomotive Stoker Co Controller-cam device.
DE473945C (en) * 1927-02-18 1929-03-28 Beldam Werke Maschinen Und App Cam disc with adjustable thrust cam and device for setting the thrust cam
GB818857A (en) * 1957-10-07 1959-08-26 Spuehl Ag Improvements in or relating to coiled springs
GB1020122A (en) * 1963-11-15 1966-02-16 Bennett Tools Ltd Improvements relating to spring coiling machines
US3678970A (en) * 1971-01-11 1972-07-25 Milton H Dammel Looping and hooking machine
SU396149A1 (en) * 1971-09-06 1973-08-29 Всесоюзный проектно конструкторский технологический институт атомного машиностроени , котлостроени
SU599896A1 (en) * 1975-12-25 1978-03-30 Myasyugov Sergej Ya Automatic spring-coiling machine
JPS58112623A (en) * 1981-12-25 1983-07-05 Shinko Kikai Kogyo Kk Adjusting method for spring manufacturing machine
JPS61222647A (en) * 1985-03-28 1986-10-03 Asahi Seiki Kogyo Kk Method and device for producing multilayer coil spring
JPS61229434A (en) * 1985-06-29 1986-10-13 Asahi Seiki Kogyo Kk German type hook forming method for tension spring
KR910009565B1 (en) * 1989-07-11 1991-11-21 문종판 Oil spring machine
US4947670A (en) * 1989-11-07 1990-08-14 Wu Chin Tu Universal automatic spring-making machine
GB2245850A (en) * 1989-11-07 1992-01-15 Chin Tu Wu Automatic spring-making machine
JPH03285729A (en) * 1990-03-30 1991-12-16 Metsuku Mach Kk Manufacture of coil spring and its device
CN2174276Y (en) * 1992-11-21 1994-08-17 吴金涂 Universal automatic spring machine
CN2749601Y (en) * 2004-12-03 2006-01-04 李德锵 Input material length control cam for mattress spring machine
CN201940515U (en) * 2010-09-25 2011-08-24 浙江美力科技股份有限公司 Semi-automatic forming machine for plane scroll spring
CN102069135A (en) * 2010-09-25 2011-05-25 浙江美力弹簧有限公司 Flat spiral spring presetting molding machine
CN206366627U (en) * 2017-01-11 2017-08-01 东莞市鑫鼎机械设备有限公司 A kind of new eight axles spring manufacturing equipment
CN206366628U (en) * 2017-01-11 2017-08-01 东莞市鑫鼎机械设备有限公司 A kind of eight axle spring forming mechanisms
CN206392773U (en) * 2017-01-11 2017-08-11 东莞市鑫鼎机械设备有限公司 A kind of six axle spring manufacturing equipments
CN206392774U (en) * 2017-01-11 2017-08-11 东莞市鑫鼎机械设备有限公司 A kind of eight axle spring manufacturing equipments
CN206392770U (en) * 2017-01-11 2017-08-11 东莞市鑫鼎机械设备有限公司 Line mechanism is turned in a kind of spring line sending
CN206889541U (en) * 2017-05-27 2018-01-16 雷振邦 The plane scroll spring of curtain driving device
CN207787582U (en) * 2018-01-01 2018-08-31 株洲名扬橡塑有限公司 A kind of novel eight axis springs manufacturing equipment

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Application publication date: 20190820