CN103318216A - Modified low-level push-pull single-drawbar locomotive traction device - Google Patents
Modified low-level push-pull single-drawbar locomotive traction device Download PDFInfo
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- CN103318216A CN103318216A CN2013102840521A CN201310284052A CN103318216A CN 103318216 A CN103318216 A CN 103318216A CN 2013102840521 A CN2013102840521 A CN 2013102840521A CN 201310284052 A CN201310284052 A CN 201310284052A CN 103318216 A CN103318216 A CN 103318216A
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Abstract
A modified low-level push-pull single-drawbar locomotive traction device comprises a drawbar 1, a drawbar 2, an end-beam auxiliary hanging link, a drawbar pin, a rubber joint, a flange component and the like. The drawbar 1 is connected with a frame traction base through the rubber joint, the drawbar 2 is connected with a body traction base through the flange component, and the drawbar 1 and the drawbar 2 are connected by the drawbar pin. The lower end of the end-beam auxiliary hanging link is connected with the drawbar pin, and rollers with bearings and rims are respectively mounted at two ends of an elastic pull rod on the end-beam auxiliary hanging link, and are mounted in four box-shaped rails. The four box-shaped rails from top to bottom are detachable. The length of the drawbar 1 of the traction device is 3.78m, bogie frame traction points are set between the shafts 2 and 3 and the shafts 4 and 5, the lateral component generated from the traction force and the brake force is only two thirds of that of the conventional design, and accordingly, rim eccentric wear and tread wear of wheels can be reduced.
Description
Technical field
The invention belongs to: railway high-power AC transmission power car traction field.
Background technology
Since two thousand six, syntonic type high power AC locomotive is born and drops in batches to use and indicates that China railways locomotive industry has successfully realized having DC drive to turn to the conversion of AC Drive, and the locomotive manufacturing technology reaches world-class levels.It has the advantages such as tractive property is superior, power is large, adhesion availability is high, the Acceleration of starting performance is good, reliability is high, power factor is high, energy-saving and emission-reduction are good, maintenance workload is little, is the needs of China railways modernization traction equipment Development.
The model of at present syntonic type High-power AC drives locomotive production has HXD1, HXD1B, HXD1C, HXD2, HXD2B, HXD2C, HXD2C, HXD3, HXD3B, HXD3C, HXD3D etc., finds to adopt the locomotive of the single draw bar draw gear of push-pull type that the serious eccentric wear of wheel rim and tread wear problem are arranged in the utilization.The syntonic type locomotive that uses with Lanzhou west locomotive depot is as example, and this section is equipped with 293 in HXD1C locomotive, draws for goods train; Be equipped with 40 of HXD3 type locomotives, be used for the passenger train traction; Reach the standard grade successively from October, 2010 and to take on the traction task less than 1 year, the part wheel rim of locomotive has worn away nearly limit, some hollow on worn treads are serious, some treads are peeled off in addition in various degree, in order to guarantee locomotive operation safety, have to wheel diameter Xuan is little, to guarantee enough flange thicknesses, though the small part locomotive has been carried out the driving wheel transposing to be processed, but can not tackle the problem at its root, have the serious locomotive that wears away of part wheel rim to process and turn depot repair, present most locomotives carried out a Xuan to be repaiied, and some locomotives had carried out three Xuan and repaiied.Because the Xuan amount of repairing is large, this section has been equipped with three lathe used for machining in-situ locomotive wheel, sometimes can't in time finish the work.What use because of this car is the import solid wheel, expensive, adds that each wheel is seriously uneven to wheel rim and tread wear, and a wheel rim wears away limit, and car load is taken turns all wanting Xuan to repair.General tread fine jade falls the 3mm left and right thickness, and wheel rim just can recover 1mm thickness, has so greatly shortened wheel service life, and maintenance cost is very high.At present, the locomotive subject matter that is used for the passenger vehicle traction is the flange wear consumption, and the locomotive that is used for the lorry traction also exists tread seriously to wear away problem except the flange wear consumption, and abrasion loss reaches 0.2-1mm/ten thousand kilometer.The locomotive abrasion loss that general new fine jade is repaiied is larger, and abrasion loss reduces gradually after after a while break-in.The tread wear that some locomotive also exists unknown cause to cause.Therefore, flange wear consumption and tread wear problem need to be resolved hurrily.
Summary of the invention
Syntonic type locomotive wheel flange wear and tread problem for the single draw bar structure of present employing low level push-pull type, analyze contrast with regard to bogie structure, draw gear and hitch position and other vehicle, the major cause of its wheel rim eccentric wear and tread wear is:
Former draw gear draw bar end carriage is assisted and hung connecting rod is captive joint (referring to attached illustrated in figures 1 and 2), and bogie truck need consume certain turning deflection force when turning tilt connecting rod, and draw bar is lifted bogie truck just rotatable (referring to accompanying drawing 3).In addition, draw bar (2) has constant slope, and connecting rod can be subject to thrust or pulling force when locomotive traction or running under braking, further consumes deflection force;
Next is that the framework towing point is selected problem: (1), be chosen between 1,2 axles and 5,6 axles such as HXD1C locomotive bogie towing point has the 828mm distance apart from breast wheel to axis; (2) the framework towing point is selected on front beam or the back end beam, such as HXD2 and HXD3D.When locomotive turning truck swing, the framework towing point can depart from the car body geometric center lines, can produce cross component under the locomotive tractive effort or electric braking force effect, thereby causes driving wheel flange wear consumption and tread wear.
Draw gear of the present invention is push-pull type low level central flat pull bar mode, can solve the problem of driving wheel flange wear consumption and tread wear.
The technical scheme of the single draw bar device for tracting locomotive of improved type push-pull type is:
1, the single draw bar device for tracting locomotive of described improved type push-pull type is such as accompanying drawing 4, shown in Figure 5.This draw gear is mainly hung connecting rod, towing pin, rubber arthrosis and flange assembly etc. and is formed by draw bar (1), draw bar (2), end carriage are auxiliary.
2, draw bar (1) links to each other with the framework traction seat by the traction rubber arthrosis, draw bar (2) links to each other with car body traction seat by flange assembly, draw bar (1), draw bar (2) then connect by towing pin, the auxiliary connecting rod lower end of hanging of end carriage connects towing pin, the roller with bearing and wheel rim is installed respectively at small end elastic draw bar two ends, be installed in the box-shaped track, track has up and down four, track is detachable, to be convenient for changing maintenance, casing both sides end cap seal, raceway casing and the welding of bogie truck front beam.
3, the auxiliary connecting rod of hanging of the end fine strain of millet of the single draw bar device for tracting locomotive of described improved type push-pull type, formed by " well " font connecting rod body and four elastic draw bars, two of lower ends connect towing pin, the roller of two the mounting strap bearings in upper end and wheel rim, cooperate box raceway, consist of to be flexibly connected to assist and hang connecting rod mechanism, can bear pulling force and thrust from connecting rod; When truck swing, with the equidistant rolling of the roller of bearing, end carriage is auxiliary hangs connecting rod no longer tilt (referring to accompanying drawing 12), such consequence devised has been eliminated the impact that connecting rod is turned on engine truck, to obviously improve the rotating property of bogie truck, greatly reduce wheel rim eccentric wear and tread wear.Be applicable to B
0-B
0And C
0-C
0The single draw bar truck frame of push-pull type.
4, the single draw bar device for tracting locomotive of described improved type push-pull type, it is characterized in that: the length of the draw bar in the draw gear (1) is 3780mm, with C
0-C
0The single draw bar truck frame of push-pull type towing point is located at (such as Fig. 4, shown in Figure 5) between 2,3 and 4,5 axles.The cross component that is produced by tractive force and braking force reduces nearly 1/3rd than former design, can reduce wheel rim eccentric wear and tread wear.
5, the single draw bar device for tracting locomotive of described improved type push-pull type, it is characterized in that: draw bar (2) the relatively angle of draw bar (1) is 4.3 °.
6, the single draw bar device for tracting locomotive of described improved type low level push-pull type, it is characterized in that: the draw bar material is 16MnDR, connecting rod material is C level steel.
Make a concrete analysis of as follows:
1, the effect of draw gear
Draw gear is the vitals that connects locomotive car body and bogie truck, and its Main Function is to transmit the locomotive tractive effort or braking force.Draw gear should adapt to the various relative motions between locomotive car body and the bogie truck during locomotive operation, should there be constraint to these motions, traverses the revolution in horizontal surface comprising bogie truck with respect to car body, the sink-float vibration of the relative bogie truck of car body, pitching and rolling.
, locomotive is turned and wheeling edge wearing
When locomotive during by the straight line arrival curve, forecarriage is introduced into bend, the first round, bogie truck was forced to rotation, along with the car body deflection that moves ahead of locomotive to wheel rim elder generation top outside rail, though trailing truck is on the straight line, but because of car body deflection, trailing truck is equivalent to rotate, as seen, rotate when forecarriage is met bend " initiatively " some, also be the key of turning.
The railroad bed outside track is higher than inner orbit on bend, its objective is the centnifugal force that produces for balance locomotive Ackermann steer angle, prevents that train from toppling.Simultaneously again locomotive, wheel of vehicle tread are designed to taper, during the wheel transverse shifting, diameter also changes thereupon, is conducive to like this locomotive, turn inside diameter.If locomotive with medium velocity when bend moves: the locomotive centnifugal force is a bit larger tham locomotive gravity component, and the outboard wheels diameter became large when wheel outwards moved, and inside diameter diminishes, and locomotive is turned smoothly; The locomotive centnifugal force is slightly smaller than locomotive gravity component, and the outboard wheels diameter diminished when wheel moved inward, and it is large that inside diameter becomes, and is in the automatic adjustment state of turning between the wheel track, and abrasion generally can not appear in wheel rim.When locomotive speed was higher, the locomotive centnifugal force was greater than partical gravity, and the top bend of locomotive outer rim outside rail begins to occur wheeling edge wearing, and speed more high centrifugal force is larger, and wheeling edge wearing is more serious; When locomotive speed is low, be subjected to the effect of locomotive gravity component, the top curve inner side rail of engine truck, inboard wheel wheeling edge wearing, outboard wheels tread wear.In the ideal case, the bogie truck center of gyration should be located on the bogie truck geometric center point, driving wheel wheeling edge wearing on the bogie truck is uniform basically like this, but because locomotive is for preventing serpentine locomotion, the bogie truck two ends are equipped with anti-snakelike bumper, there are again high circle spring and vertical bumper etc. in both sides, bogie truck will be affected by anti-snakelike damping force of vibration damper and high circle spring deformation force will when rotating, wheel rim can produce eccentric wear, as being subject to the impact of other turning additional resistance and the locomotive tractive effort or braking force cross component, the flange wear consumption will be aggravated again.
, the stressing conditions analysis of former design draw gear when the curve
⑴ draw gear end carriage is auxiliary to be hung connecting rod bogie truck is turned to impact
Take HXD1C as example:
If draw bar weight is 1000kg, and is known: end carriage is assisted and hung length of connecting rod is 475mm, and draw bar (2) length is 1180mm, degree of dip is 4.3 °, 1,2 wheelbases are 2250mm, and draw bar (1) length is 2377mm, when bogie truck front beam deflection ± 155mm.Ask: 1. draw bar Action of Gravity Field, hang connecting rod bogie truck is turned to influence power, 2. the locomotive tractive effort is applied on the draw bar (2), hangs connecting rod bogie truck is turned to influence power.
As seen: bogie truck end carriage deflection 155mm, hang reason because the draw bar end carriage is auxiliary, need the first round to the approximately additional deflection power of 245.86+981=1226.86kg is provided, caused thus unnecessary wheel rim and tread wear.
⑵ draw gear framework hitch position turns to impact to bogie truck:
HXD3 and HXD1C all adopt C
0-C
0Shaft type bogie truck, draw gear are the single draw bar structure of low level push-pull type.The now concrete analysis as an example of the HXD1C locomotive example:
The framework traction seat is selected between 1,2 and 5,6 axles.As shown in Figure 2, drawbar length 3557mm, towing point has the 828mm distance apart from the 2nd or 5 axles, so towing point is slip-angle steering frame center of gyration, truck swing when locomotive passes through curve, form angle α with the car body line of centers, this moment, draw bar was also along with deflection, with car body line of centers formation angle β, as shown in Figure 6, although this angle is little, consequent component impact can not be despised, particularly damped condition, because framework towing point and center of gyration depart from, can produce the reversing sense turning force, hinder bogie truck and rotate, aggravate wheel rim eccentric wear and tread wear.
According to HXD1C locomotive traction bar, bogie truck and the right design size of wheel, for convenient estimation, we set:
1. the tractive force of a bogie truck is 260KN, and braking force is 200KN.
2. because of the deflection angle of draw bar less than 1 °, the tractive force that acts on the car body approximates the bogie truck tractive force.
Truck swing when 3. locomotive is by curve, end carriage deflection ± 155mm, framework towing point depart from car body geometric center lines 40mm.
4. the bogie truck center of gyration is on 2,5 shaft centre lines.
The below only estimates trailing or leading bogie deflection, and draw bar departs from the side force that produces behind the car body line of centers
During running under power:
(1) during the forecarriage running under power, draw bar is power by compression, plane of constraint power be figure referring to shown in the accompanying drawing 7:
Known: drawbar length is 3557mm, and tractive force is 260KN, and the framework towing point is apart from the 2nd or 5 axle 828mm, because draw bar departs from the car body line of centers, the tractive force that acts on the car body can produce cross component F
QQC
When train moved at bend, after bogie truck turned over certain angle, if turning radius is constant, bogie truck should not rotate again.
This cross component size is directly proportional with tractive force and holding torque always, can increase flange wear and consume.
(2) during the trailing truck running under power, draw bar is subjected to pulling force, and the cross component of generation equates with forecarriage, and this cross component size is directly proportional with tractive force and holding torque always, can increase the wheel rim eccentric wear.
During the damped condition operation:
(1) in damped condition when operation,, the forecarriage draw bar is subjected to pulling force, stressing conditions as shown in Figure 8:
Known: drawbar length 3557mm, braking force are 200KN, and towing point is apart from the 2nd or 5 axle 828mm, because draw bar departs from the car body line of centers, by the cross component F of side arm braking force generation
QZCFor
This cross component produces the moment opposite with the bogie truck turn direction, can make the serious eccentric wear of driving wheel wheel rim.
(2) during running under braking, the trailing truck draw bar is power by compression, and the cross component that braking force produces and forecarriage equate.
Can find out from framework towing point force analysis, when locomotive turning truck swing, the framework towing point can depart from the car body geometric center lines, and tractive force or electric braking force effect meeting produce cross component, thereby causes driving wheel flange wear consumption and tread wear.
, the present invention changes into bogie truck stressing conditions analysis when the curve between 2,3 axles and 4,5 with the framework traction seat
If: drawbar length is 4960mm, and tractive force is 260KN, braking force 200 KN, the framework towing point is apart from the 2nd or 5 axle 828mm, and towing point departs from car body geometric center lines 40mm, as shown in Figure 9:
During running under power:
(1) during running under power, the forecarriage draw bar is power by compression, stressing conditions as shown in Figure 10:
(2) the trailing truck draw bar is subjected to pulling force, and the cross component of generation is identical with forecarriage, the moment of rotation that this cross component produces also can the time wheel rim eccentric wear.
During running under braking:
(1) the forecarriage draw bar is subjected to pulling force, stressing conditions as shown in Figure 11:
Because draw bar departs from the car body line of centers, by the cross component F of braking force generation
QZC
(2) trailing truck draw bar power by compression, because draw bar departs from the car body line of centers, the cross component that braking force produces is identical with forecarriage.
As seen: after the framework towing point was changed between 2,3 and 4,5 axles draw bar lengthened, cross component reduced about 32.5%, can reduce wheel rim of locomotive and tread wear.
, cross component and tread wear
From upper surface analysis as can be known: former design truck frame towing point is 1,2 axles and 5, between 6 axles, locomotive is when bend traction or running under braking, the truck swing draw bar also produces cross component along with disalignment, when bogie truck enters straight way by bend, full recuperability by high circle spring is restored draw bar, but be subjected to the effect of tractive force or braking force in traction or damped condition, the car body towing point, framework towing point and bogie truck center of gyration form triangle, high garden spring can not overcome its cross component fully and anti-hunting Damper resistance restores draw bar fully to the car body geometric center lines, and keep certain deformation, particularly when end fine strain of millet is hung connecting rod and tilted by thrust, turn to frame end fine strain of millet will bear deflection force always, therefore bogie truck is in the askew status operation always, to evoke like this hunting of bogie truck, wheel tread constantly horizontally slips, and has increased the abrasion of wheel tread and peels off.
6, the present invention reduces shelled tread and abrasion principle
The end fine strain of millet of device for tracting locomotive of the present invention is assisted and hangs connecting rod is moving connecting mechanism, can bear pulling force and thrust from connecting rod; When truck swing, with the equidistant rolling of the roller of bearing, end carriage is auxiliary to be hung connecting rod and no longer tilts, and has eliminated the impact that connecting rod is turned on engine truck, will obviously improve the rotating property of bogie truck.
The present invention is also with C
0-C
0After the single draw bar framework of bogie truck push-pull type towing point was changed between 4,5 and 2,3 axles, the first driving wheel lengthened to the arm of force of framework towing point, and forecarriage is easy to return again original position after entering straight line by bend, can reduce hollow on worn tread and peel off.
, the single draw bar draw gear of end tension and compression side force
The AC transmission electric power locomotives such as HXD2, HXD3D adopt the single draw bar draw gear of end tension and compression at present, its two ends are connected on two end bearings by bolt and flange, realize the function of transmitting tractive power and braking force, have the drum type brake rubber element can relax longitudinal force to the impact of car body in the free bearing.This draw gear is simple in structure, but the Length Ratio of increase draw bar is difficult.When bogie truck was turned, towing point departed from the car body line of centers, can produce cross component when locomotive traction and damped condition operation, can increase the abrasion of wheel rim and tread:
With C
0-C
0Bogie truck is example: be 1650mm such as length of draw bar, bogie truck end carriage deflection 120mm, when tractive force is 260KN, the cross component that produces is about 3000kg, conversion is about about 4500kg to the lateral pressure of the first driving wheel wheel rim, so big application force can cause the serious eccentric wear of wheel rim, moreover has the locomotive derailing dangerous.
Description of drawings
Fig. 1 is former draw gear structure and assembly drowing;
Fig. 2 is former draw gear scantling of structure drawing;
Fig. 3 is that former draw gear end carriage is hung connecting rod inclination schematic diagram;
Fig. 4 newly designs draw gear draw bar structure and assembly drowing;
Fig. 5 newly designs draw gear scantling of structure drawing;
Fig. 6 is former draw gear forecarriage traction working condition framework towing point force diagram;
Fig. 7 is that former draw gear forecarriage traction working condition framework towing point plane can friendship power system be schemed;
Fig. 8 is former draw gear forecarriage damped condition framework towing point force diagram;
Fig. 9 is new draw gear forecarriage traction working condition framework towing point force diagram;
Figure 10 is that new draw gear forecarriage traction working condition framework towing point plane can friendship power system be schemed;
Figure 11 is new draw gear forecarriage damped condition framework towing point force diagram;
Figure 12 newly designs the movable auxiliary hanging hang device of draw gear end carriage front elevation;
Figure 13 newly designs the movable auxiliary hanging hang device of draw gear end carriage lateral plan.
Each part description among the figure:
B-safety steel cable C-car body D1～D6-locomotive 1～6 driving wheel E-bogie truck front beam N F-flange assembly;
The auxiliary connecting rod J-hanging board K-bogie truck front beam of hanging of G-safety guard H-rail I-end carriage;
L1-draw bar (1) L2-draw bar (2) L-draw bar assembly M-track casing N-track P-roller;
Q-towing pin S-height circle spring T-elastic draw bar U-housing plate Y-locomotive operation direction Z-bogie truck;
A-framework towing point b-car body towing point d-draw bar auxiliary hanging hanging point e-bogie pivot center line f-car body line of centers;
α-bogie pivot center line and car body line of centers angle β-draw bar and car body line of centers angle;
γ-auxiliary the angularity of connecting rod of hanging.
The specific embodiment
1, the movable end carriage of the present invention is hung bar linkage structure shown in Figure 12,13, connecting rod body is " well " font, and during the locomotive traction operation, forecarriage draw bar (2) is stressed, the component that this pressure produces makes hangs the connecting rod under tension, and roller is pressed on the lower railway and rolls; The trailing truck draw bar is subjected to pulling force, hangs connecting rod and is subjected to thrust, and when pressure during greater than draw bar gravity, roller withstands on the upper rolling of getting on the right track.Rotate in order to cushion various vibrations and to adapt to bogie truck, this connecting rod is comprised of four elastic draw bars, and two of lower ends connect towing pin, and roller is installed in two of upper ends." well " font connecting rod body can guarantee the equidistant rolling of roller, about do not tilt.
2, end carriage of the present invention is hung the connecting rod roller structure shown in Figure 12,13, and roller is the steel wheel that wheel rim is arranged, and the inner coro bearng of installing compresses bearing by gland, is the interference assembling between bearing and the pull bar.
3, end carriage of the present invention is hung connecting rod track box structure shown in Figure 12,13, mainly be comprised of top board, header board, two base plates and two end plates, inboard base plate and end carriage base plate have certain distance, are welded with a plurality of reinforced ribs in order to gain in strength, article four, guide rail is demountable structure, to make things convenient for repair.To hang and put the casing raceway of packing into after two groups of rollers of connecting rod install, and with screw track be tightened fixingly, setting up links to each other connecting rod lower end elastic draw bar behind the end cap again with towing pin namely finishes installation.
4, the present invention also lengthens the draw bar L1 in the former draw gear, and the truck frame towing point is located between 2,3 and 4,5 axles (as shown in Figure 5).Because of the lengthening of draw bar L1, its intensity need increase.By estimation as can be known, the cross component that is produced by tractive force and braking force has reduced nearly 1/3rd than former design.
Device for tracting locomotive of the present invention is hung small end and is changed the action roller mode into end carriage is auxiliary, simultaneously again with C
0-C
0Shaft type list draw bar bogie truck draw bar L1 lengthens, and the framework towing point has been changed between 2,3 and 4,5 axles.As bogie truck end carriage deflection 155mm, when single frame tractive force is 260KN, can make the first driving wheel reduce respectively approximately 1227kg and 188kg because of the side force that tractive force produces, the rotating property of bogie truck will obviously be improved, greatly reduce wheel rim eccentric wear and tread wear, be of great significance guaranteeing safety of railway traffic and reducing maintenance cost.
Claims (3)
1. the single draw bar device for tracting locomotive of an improved type push-pull type is hung connecting rod, towing pin, rubber arthrosis and flange assembly etc. and is formed by draw bar (1), draw bar (2), end carriage are auxiliary; It is characterized in that: draw bar (1) links to each other with the framework traction seat by the traction rubber arthrosis, draw bar (2) links to each other with car body traction seat by flange assembly, draw bar (1), draw bar (2) then connect by towing pin, the auxiliary connecting rod lower end of hanging of end carriage connects towing pin, the roller with bearing and wheel rim is installed respectively at the elastic draw bar two ends on the connecting rod, be installed in the box-shaped track, four have bar about the track, track is detachably to make things convenient for repair, casing both sides end cap seal, raceway casing and the welding of bogie truck front beam.
2. according to the single draw bar device for tracting locomotive of claim 1 described a kind of improved type push-pull type, it is characterized in that: the auxiliary roller of hanging small end mounting strap bearing and wheel rim of end carriage, cooperate box raceway, consist of to be flexibly connected to assist and hang connecting rod mechanism, can bear pulling force and thrust from connecting rod; When truck swing, roll with the roller of bearing, end carriage is auxiliary to be hung connecting rod and no longer tilts, and bogie truck rotates the impact that no longer is subjected to draw bar; This connecting rod is comprised of " well " font connecting rod body and four elastic draw bars, and two of lower ends connect towing pin, and roller is installed in two of upper ends, and " well " font connecting rod body can guarantee two groups of equidistant rollings of roller, about do not tilt, be applicable to B
0-B
0And C
0-C
0The single draw bar bogie truck of push-pull type.
3. according to the single draw bar device for tracting locomotive of claim 1 described improved type push-pull type, it is characterized in that: the length of the draw bar in the draw gear (1) is 3780mm, and the truck frame towing point is located between 2,3 and 4,5 axles, is applicable to C
0-C
0The single draw bar bogie truck of push-pull type.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109482723A (en) * | 2017-09-13 | 2019-03-19 | 河北银隆新能源有限公司 | A kind of tape threading apparatus of lithium battery coating machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109482723A (en) * | 2017-09-13 | 2019-03-19 | 河北银隆新能源有限公司 | A kind of tape threading apparatus of lithium battery coating machine |
| CN109482723B (en) * | 2017-09-13 | 2023-10-17 | 河北银隆新能源有限公司 | Belt threading device of lithium battery coating machine |
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