CN107240893B - A kind of cable puller suitable for out-of-flatness region - Google Patents

A kind of cable puller suitable for out-of-flatness region Download PDF

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Publication number
CN107240893B
CN107240893B CN201710659233.6A CN201710659233A CN107240893B CN 107240893 B CN107240893 B CN 107240893B CN 201710659233 A CN201710659233 A CN 201710659233A CN 107240893 B CN107240893 B CN 107240893B
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CN
China
Prior art keywords
helical gear
cable
transmission
gear
turbine
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Active
Application number
CN201710659233.6A
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Chinese (zh)
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CN107240893A (en
Inventor
华国玉
任志
罗军川
刘陈忠
杨杰民
黄小青
苏威
仇荣
罗宝杰
罗敏
李勇
彭海恩
贾顺虎
向洋
徐钱平
陈诚
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State Grid Sichuan Electric Power Co Ltd
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State Grid Sichuan Electric Power Co Ltd
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Priority to CN201710659233.6A priority Critical patent/CN107240893B/en
Publication of CN107240893A publication Critical patent/CN107240893A/en
Application granted granted Critical
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/06Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
    • H02G1/08Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K7/00Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Abstract

The invention discloses a kind of cable puller suitable for out-of-flatness region, a cable is clamped in two clamping pieces respectively;The power of motor is transported on two clamping pieces by the second transmission mechanism and the first transmission mechanism, and two clamping pieces drive cable movement;Turbine and runner are arranged oppositely in liquid case, and input shaft one end connects turbine, and the other end connects motor output end;Output shaft one end connects runner, and the other end connects the first transmission mechanism;Through-hole of the setting through turbine on turbine;First helical gear wheel shaft is connected to clamping piece and exports power, and the 5th helical gear is snapped at side gear, and the 5th helical gear wheel shaft is connected to output shaft and receives power.A kind of cable puller suitable for out-of-flatness region of the invention, it is cooperated by the first transmission mechanism and the second transmission mechanism, the reduction of speed to the continuous two-stage of the cable for receiving resistance by mechanical mechanism is realized, to reduce the tension on cable, Electrical Safety is improved, and reliability is high.

Description

A kind of cable puller suitable for out-of-flatness region
Technical field
The present invention relates to power engineering fields, and in particular to a kind of cable puller suitable for out-of-flatness region.
Background technology
Power cable is the cable for being used for transmission and distributing electric energy, and power cable is usually used in Urban Underground power grid, power station Lead line, industrial and mining enterprises' in-line power and mistake river sea submarine transmission line.In power circuit, cable proportion just gradually increases Add.Power cable is in the basic routing line of electric system transmitting and distribute the cable product of high-power power, including 1- 500KV and any of the above voltage class, the power cable of various insulation.The use of power cable has over one hundred year calendar so far History.1879, American inventor T.A. Edison wrapped jute on copper rod and is penetrated in iron pipe, and it is mixed to be subsequently filled pitch It closes object and cable is made.This cable laying in New York, has been started underground transmission by him.Next year, British Ka Lunde inventions pitch leaching Stain paper insulation power cable.1889, British S.Z. Ferranti, Sebastian Ziani des laid 10 kilovolts of oil immersions between London and moral spy Ford Paper insulated cable.1908, Britain built up 20 kv cable nets.Power cable obtains increasingly wider application.1911, Germany 60 kilovolts of high-tension cables are laid into, the development of high-tension cable has been started.1913, German M. Huo Xishitaite were developed into split-phase Shielded cable improves the distribution of cable internal electric field, eliminates the positive shearing stress of insulating surface, it is developing to become power cable Milestone.Nineteen fifty-two, Sweden have laid 380 kilovolts of extra-high-tension cables in northern power plant, have realized the application of extra-high-tension cable. 1100 kilovolts, 1200 kilovolts of extra-high voltage electric power cable has been made to the eighties.
With the development of urban planning, a large amount of cable laying is converted to embedded underground from overhead form.Cable In embedded underground, need to be laid in preset cable shaft.Since the electrical equipment in cable shaft is numerous so that two cables , can be by different resistances simultaneously in delivered downhole, when a cable is increased by resistance, cable stretch becomes larger, and causes Cable insulation damage layer threatens Electrical Safety.
Invention content
The technical problem to be solved by the present invention is to two cables simultaneously in delivered downhole, can by different resistances, When a cable is increased by resistance, cable stretch becomes larger, and leads to cable insulation damage layer, and Electrical Safety, purpose is threatened to exist In providing a kind of cable puller suitable for out-of-flatness region, solve the above problems.
The present invention is achieved through the following technical solutions:
A kind of cable puller suitable for out-of-flatness region, including two clamping pieces, the first transmission mechanism, the second transmission Mechanism and motor;Described two clamping pieces are arranged in parallel, and a cable is clamped in two clamping pieces respectively;The motor, second Transmission mechanism and the first transmission mechanism are sequentially connected, and the power of motor is transported to by the second transmission mechanism and the first transmission mechanism On two clamping pieces, described two clamping pieces drive cable movement;Second transmission mechanism includes liquid case, turbine, through-hole, defeated Enter axis, runner and output shaft;Liquid is set in the liquid case;The turbine and runner are arranged oppositely in liquid case, and input shaft One end connects turbine, and the other end connects motor output end;Described output shaft one end connects runner, and the other end connects the first driver Structure;Through-hole of the setting through turbine on the turbine;First transmission mechanism includes the first helical gear, the second helical gear, the Three helical gears, the 4th helical gear, the 5th helical gear, side gear and two holders;First helical gear, the second helical gear, Three helical gears and the 4th helical gear are engaged successively, and the 4th helical gear and the occlusion of the first helical gear;The first helical gear wheel Axis connection is in clamping piece and exports power, and the third helical gear wheel shaft is connected to another clamping piece and exports power;It is described Two holders are set on side gear, and the second helical gear wheel shaft is movably set in an one end of the holder far from side gear, 4th helical gear wheel shaft is movably set in the one end of another holder far from side gear;Described two holders are set to side gear The endpoint of upper one end is conllinear with the axle center of side gear;5th helical gear is snapped at side gear, and the 5th helical gear wheel shaft It is connected to output shaft and receives power.
In the prior art, since the electrical equipment in cable shaft is numerous so that two cables are simultaneously in delivered downhole, meeting By different resistances, when a cable is increased by resistance, cable stretch becomes larger, and leads to cable insulation damage layer, threatens Electrical Safety.The present invention in application, motor conveys power by the first transmission mechanism and the second transmission mechanism to two clamping pieces, When normal operation, motor drives turbine rotation by input shaft, and turbine drives the liquid flowing in liquid case, to which liquid drives Runner rotates, and output shaft rotates therewith;The 5th helical gear rotates immediately, and side gear is driven to rotate, two on side gear branch Frame rotates and drives the first helical gear and third helical gear to rotate, to export power, cable movement to two clamping pieces;Due to When proper motion, the resistance that cable is subject on two clamping pieces is identical, so the first helical gear is identical with third helical teeth wheel speed. When there is the cable of side to be increased by resistance, the second helical gear and the 4th helical gear start to rotate, so that the 5th helical teeth The rotating speed of wheel conveying changes on the first helical gear and third helical gear, to reduce the movement speed that resistance increases side cable Degree, ensure that cable stretch will not be excessive, cable insulation is survivable, has ensured Electrical Safety;When the resistance that cable is subject to When excessive, turbine drives the liquid flowing in liquid case, and runner is since resistance increases, and the kinetic energy of the liquid in liquid case will not be complete It is transmitted on runner, but is returned at turbine by through-hole, to reduce the speed of service of cable on two clamping pieces, thus into One step reduces the tension on cable.First transmission mechanism and the second transmission mechanism ensure that cable respectively as two-stage reduction of speed On tension will not be excessive.Simultaneously because the reliability of control panel depends on service life shortest electric elements on control panel, So the reliability of control panel is nothing like mechanical structure, this is allowed in cable transfer, and the reliability of mechanical structure is more The probability of height, cable bad is lower.The present invention is cooperated by the first transmission mechanism and the second transmission mechanism, is realized and is passed through Mechanical mechanism improves Electrical Safety to the reduction of speed of the continuous two-stage of the cable for receiving resistance to reduce the tension on cable, And reliability is high.
Further, the liquid being arranged in the liquid case uses machine oil.
The present invention so machine oil is arranged in liquid case, avoids power output in application, the compression ratio due to machine oil is very low Waste.
Further, the clamping piece includes driving wheel, the first crawler belt, the first driven wheel, the second driven wheel, the second crawler belt With third driven wheel;First crawler belt is set to the outer rim of driving wheel and the first driven wheel;Second crawler belt is set to Two driven wheels and third driven wheel;The driving wheel is connected to the first transmission mechanism and receives power.
The present invention is in application, by being arranged above-mentioned apparatus so that cable can be clamped part held tight.
Further, first helical gear, the second helical gear, third helical gear, the 4th helical gear and the 5th helical gear Using 42CrMo steel.
Further, the blade of the turbine uses 20cr steel.
Further, the diameter for the through-hole being arranged on the turbine uses the 10~15% of turbine diameter.
The present invention is in application, inventor has found, when the diameter of through-hole uses the 10~15% of turbine diameter, you can to have The power for avoiding runner from exporting of effect is excessive, and runner rotating speed can also be avoided too low.
Further, the height of the flabellum of the runner uses the 15~20% of runner diameter.
The present invention is in application, the height of the flabellum of runner uses the 15~20% of runner diameter, so that runner is to liquid The flowing of body is more sensitive, improves the sensitivity of whole equipment.
Further, the blade of turbine uses the 10~15% of turbine diameter.
The present invention is in application, the blade of turbine uses the 10~15% of turbine diameter, so that driving liquid in turbine It is more obvious to the energy transmission effect of liquid when rotation, improve the sensitivity of whole equipment.
Further, described two holders use cast iron.
Further, described two holders are by being welded to connect in the side of side gear.
Compared with prior art, the present invention having the following advantages and advantages:
1, a kind of cable puller suitable for out-of-flatness region of the invention, passes through the first transmission mechanism and the second driver Structure cooperates, and the reduction of speed to the continuous two-stage of the cable for receiving resistance by mechanical mechanism is realized, to reduce on cable Tension, improve Electrical Safety, and reliability is high;
2, a kind of cable puller suitable for out-of-flatness region of the invention, you can dynamic effectively to avoid runner from exporting Power is excessive, and runner rotating speed can also be avoided too low;
3, a kind of cable puller suitable for out-of-flatness region of the invention so that runner is quicker to the flowing of liquid Sense, improves the sensitivity of whole equipment.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention;
Fig. 2 is clamping piece structural schematic diagram of the present invention;
Fig. 3 is the first transmission mechanism structural schematic diagram of the invention;
Fig. 4 is the second transmission mechanism structural schematic diagram of the invention.
Label and corresponding parts title in attached drawing:
1- cables, 2- clamping pieces, the first transmission mechanisms of 3-, the second transmission mechanisms of 4-, 5- motors, 21- driving wheels, 22- One crawler belt, the first driven wheels of 23-, the second driven wheels of 24-, the second crawler belts of 25-, 26- third driven wheels, the first helical gears of 31-, The second helical gears of 32-, 33- third helical gears, the 4th helical gears of 34-, the 5th helical gears of 35-, 36- side gears, 37- holders, 41- Liquid case, 42- turbines, 43- through-holes, 44- input shafts, 45- runners, 46- output shafts.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make For limitation of the invention.
Embodiment 1
Shown in as shown in Figure 1, Figure 3 and Figure 4, a kind of cable puller suitable for out-of-flatness region of the invention, including two folders Gripping member 2, the first transmission mechanism 3, the second transmission mechanism 4 and motor 5;Described two clamping pieces 2 are arranged in parallel, and two clamping pieces 2 are clamped a cable 1 respectively;The motor 5, the second transmission mechanism 4 and the first transmission mechanism 3 are sequentially connected, and the second transmission The power of motor 5 is transported on two clamping pieces 2 by mechanism 4 and the first transmission mechanism 3, and described two clamping pieces 2 drive cable Movement;Second transmission mechanism 4 includes liquid case 41, turbine 42, through-hole 43, input shaft 44, runner 45 and output shaft 46;It is described Liquid is set in liquid case 41;The turbine 42 and runner 45 are arranged oppositely in liquid case 41, and 44 one end of input shaft connects turbine 42, the other end connects 5 output end of motor;46 one end of the output shaft connects runner 45, and the other end connects the first transmission mechanism 3; Through-hole 43 of the setting through turbine 42 on the turbine 42;First transmission mechanism 3 includes the first helical gear 31, the second helical teeth Wheel 32, third helical gear 33, the 4th helical gear 34, the 5th helical gear 35, side gear 36 and two holders 37;First helical teeth The 31, second helical gear 32 of wheel, third helical gear 33 and the 4th helical gear 34 are engaged successively, and the 4th helical gear 34 and the first helical teeth 31 occlusion of wheel;The wheel shaft of first helical gear 31 is connected to clamping piece 2 and exports power, and 33 wheel shaft of third helical gear connects It is connected to another clamping piece 2 and exports power;Described two holders 37 are set on side gear 36, and the wheel of the second helical gear 32 Axis is movably set in an one end of the holder 37 far from side gear 36, and the wheel shaft of the 4th helical gear 34 is movably set in another branch The one end of frame 37 far from side gear 36;Described two holders 37 are set to the axis of the endpoint Yu side gear 36 of one end on side gear 36 The heart is conllinear;5th helical gear 35 is snapped at side gear 36, and the wheel shaft of the 5th helical gear 35 is connected to output shaft 46 and connects By power.
When the present embodiment is implemented, motor 5 is conveyed by the first transmission mechanism 3 and the second transmission mechanism 4 to two clamping pieces 2 Power, when normal operation, motor 5 drives turbine 42 to rotate by input shaft 44, and turbine 42 drives the liquid flow in liquid case 41 Dynamic, to which liquid drives runner 45 to rotate, output shaft 46 rotates therewith;The 5th helical gear 35 rotates immediately, and drives side gear 36 rotate, and two holders 37 on side gear 36 rotate and drive the first helical gear 31 and third helical gear 33 to rotate, thus to Two clamping pieces 2 export power, and cable 1 moves;When due to proper motion, cable 1 is subject on two clamping pieces 2 resistance phase Together, so the first helical gear 31 is identical with 33 rotating speed of third helical gear.When there is the cable 1 of side to be increased by resistance, second Helical gear 32 and the 4th helical gear 34 start to rotate, so that the rotating speed of the 5th helical gear 35 conveying is in 31 He of the first helical gear It changes on third helical gear 33, to reduce the movement velocity that resistance increases side cable 1, ensure that 1 tension of cable will not Excessive, 1 insulating layer of cable is survivable, has ensured Electrical Safety;When the resistance that cable 1 is subject to is excessive, turbine 42 is with hydrodynamic Liquid flowing in case 41, and runner 45 is since resistance increases, the kinetic energy of the liquid in liquid case 41 will not be fully transmitted to runner It on 45, but is returned at turbine 42 by through-hole 43, to reduce the speed of service of cable 1 on two clamping pieces 2, thus into one Step reduces the tension on cable 1.First transmission mechanism 3 and the second transmission mechanism 4 ensure that cable respectively as two-stage reduction of speed Tension on 1 will not be excessive.Simultaneously because the reliability of control panel depends on service life shortest electric elements on control panel, So the reliability of control panel is nothing like mechanical structure, this is allowed for when cable 1 conveys, and the reliability of mechanical structure is more Height, the probability that cable 1 damages are lower.The present invention is cooperated by the first transmission mechanism 3 and the second transmission mechanism 4, is realized Electricity consumption is improved to reduce the tension on cable 1 to the reduction of speed of the continuous two-stage of the cable for receiving resistance by mechanical mechanism Safety, and reliability is high.
Embodiment 2
As shown in Fig. 2, the liquid that the present embodiment on the basis of embodiment 1, is arranged in the liquid case 41 uses machine oil.Institute State clamping piece 2 include driving wheel 21, the first crawler belt 22, the first driven wheel 23, the second driven wheel 24, the second crawler belt 25 and third from Driving wheel 26;First crawler belt 22 is set to the outer rim of driving wheel 21 and the first driven wheel 23;Second crawler belt 25 is set to Second driven wheel 24 and third driven wheel 26;The driving wheel 21 is connected to the first transmission mechanism 3 and receives power.
When the present embodiment is implemented, since the compression ratio of machine oil is very low, so machine oil is arranged in liquid case 41, power is avoided The waste of output, by the way that above-mentioned apparatus is arranged so that cable 1 can be clamped 2 held tight of part.
Embodiment 3
For the present embodiment on the basis of embodiment 1, the diameter for the through-hole 43 being arranged on the turbine 42 is straight using turbine 42 The 10~15% of diameter.The height of the flabellum of the runner 45 uses the 15~20% of 45 diameter of runner.The blade of turbine 42 uses The 10~15% of 42 diameter of turbine.
When the present embodiment is implemented, inventor has found, when the diameter of through-hole 43 uses the 10~15% of 42 diameter of turbine, i.e., It can effectively avoid the power that runner 45 exports excessive, 45 rotating speed of runner can also be avoided too low.The height of the flabellum of runner 45 Degree, so that runner 45 is more sensitive to the flowing of liquid, improves whole equipment using the 15~20% of 45 diameter of runner Sensitivity.The blade of turbine 42 uses the 10~15% of 42 diameter of turbine, so that when turbine 42 drives liquid rotation, It is more obvious to the energy transmission effect of liquid, improve the sensitivity of whole equipment.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not intended to limit the present invention Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include Within protection scope of the present invention.

Claims (9)

1. a kind of cable puller suitable for out-of-flatness region, which is characterized in that including two clamping pieces (2), the first transmission Mechanism (3), the second transmission mechanism (4) and motor (5);Described two clamping pieces (2) are arranged in parallel, and two clamping pieces (2) point It Jia Chi not a cable (1);The motor (5), the second transmission mechanism (4) and the first transmission mechanism (3) are sequentially connected, and second The power of motor (5) is transported on two clamping pieces (2) by transmission mechanism (4) and the first transmission mechanism (3), described two clampings Part (2) drives cable movement;Second transmission mechanism (4) includes liquid case (41), turbine (42), through-hole (43), input shaft (44), runner (45) and output shaft (46);Liquid is set in the liquid case (41);The turbine (42) and runner (45) opposite direction are set It is placed in liquid case (41), and input shaft (44) one end connection turbine (42), the other end connects motor (5) output end;The output Axis (46) one end connects runner (45), and the other end connects the first transmission mechanism (3);Setting runs through turbine on the turbine (42) (42) through-hole (43);First transmission mechanism (3) includes the first helical gear (31), the second helical gear (32), third helical teeth Take turns (33), the 4th helical gear (34), the 5th helical gear (35), side gear (36) and two holders (37);First helical gear (31), the second helical gear (32), third helical gear (33) and the 4th helical gear (34) are engaged successively, and the 4th helical gear (34) and First helical gear (31) is engaged;The wheel shaft of first helical gear (31) is connected to clamping piece (2) and exports power, the third Helical gear (33) wheel shaft is connected to another clamping piece (2) and exports power;Described two holders (37) are set to side gear (36) on, and the wheel shaft of the second helical gear (32) be movably set in a holder (37) far from side gear (36) one end, the 4th The wheel shaft of helical gear (34) is movably set in the one end of another holder (37) far from side gear (36);Described two holders (37) It is conllinear with the axle center of side gear (36) to be set to the endpoint of one end on side gear (36);5th helical gear (35) is snapped at side Gear (36), and the wheel shaft of the 5th helical gear (35) is connected to output shaft (46) and receives power.
2. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that the liquid case (41) liquid being arranged in uses machine oil.
3. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that the clamping Part (2) include driving wheel (21), the first crawler belt (22), the first driven wheel (23), the second driven wheel (24), the second crawler belt (25) and Third driven wheel (26);First crawler belt (22) is set to the outer rim of driving wheel (21) and the first driven wheel (23);Described Two crawler belts (25) are set to the outer rim of the second driven wheel (24) and third driven wheel (26);The driving wheel (21) is connected to first Transmission mechanism (3) simultaneously receives power.
4. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that described first Helical gear (31), the second helical gear (32), third helical gear (33), the 4th helical gear (34) and the 5th helical gear (35) use 42CrMo steel.
5. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that the turbine (42) blade uses 20Cr steel.
6. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that the turbine (42) diameter for the through-hole (43) being arranged on uses the 10~15% of turbine (42) diameter.
7. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that the runner (45) height of flabellum uses the 15~20% of runner (45) diameter.
8. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that described two Holder (37) uses cast iron.
9. a kind of cable puller suitable for out-of-flatness region according to claim 1, which is characterized in that described two Holder (37) is by being welded to connect in the side of side gear (36).
CN201710659233.6A 2017-08-04 2017-08-04 A kind of cable puller suitable for out-of-flatness region Active CN107240893B (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004058196A (en) * 2002-07-29 2004-02-26 Tohoku Electric Power Co Inc Remote operation tool
CN2708546Y (en) * 2004-07-03 2005-07-06 乔维宝 Constant-tension cable drum apparatus
CN201393010Y (en) * 2009-04-08 2010-01-27 安徽长江精工电工机械制造有限公司 Cable traction apparatus equipped with low-angle bevel wheel
CN101806349A (en) * 2010-04-30 2010-08-18 常州汉森机械有限公司 Crawler-type traveling power transmission
CN102421692A (en) * 2009-05-12 2012-04-18 全秉寿 Apparatus for equalizing the tensions among elevator wire ropes
CN104242162A (en) * 2014-07-28 2014-12-24 国家电网公司 Electric variable-frequency high-voltage cable conveying construction technology
CN106286748A (en) * 2016-10-13 2017-01-04 重庆大学 Dual input multi-change speed worm reducer

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004058196A (en) * 2002-07-29 2004-02-26 Tohoku Electric Power Co Inc Remote operation tool
CN2708546Y (en) * 2004-07-03 2005-07-06 乔维宝 Constant-tension cable drum apparatus
CN201393010Y (en) * 2009-04-08 2010-01-27 安徽长江精工电工机械制造有限公司 Cable traction apparatus equipped with low-angle bevel wheel
CN102421692A (en) * 2009-05-12 2012-04-18 全秉寿 Apparatus for equalizing the tensions among elevator wire ropes
CN101806349A (en) * 2010-04-30 2010-08-18 常州汉森机械有限公司 Crawler-type traveling power transmission
CN104242162A (en) * 2014-07-28 2014-12-24 国家电网公司 Electric variable-frequency high-voltage cable conveying construction technology
CN106286748A (en) * 2016-10-13 2017-01-04 重庆大学 Dual input multi-change speed worm reducer

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