WO2019041393A1 - Mécanisme de rodage et de polissage - Google Patents

Mécanisme de rodage et de polissage Download PDF

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Publication number
WO2019041393A1
WO2019041393A1 PCT/CN2017/102092 CN2017102092W WO2019041393A1 WO 2019041393 A1 WO2019041393 A1 WO 2019041393A1 CN 2017102092 W CN2017102092 W CN 2017102092W WO 2019041393 A1 WO2019041393 A1 WO 2019041393A1
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WO
WIPO (PCT)
Prior art keywords
hole
eccentric
shaft
polishing
sleeve
Prior art date
Application number
PCT/CN2017/102092
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English (en)
Chinese (zh)
Inventor
李辉
莫金树
郑连东
Original Assignee
广州市永合祥自动化设备科技有限公司
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Application filed by 广州市永合祥自动化设备科技有限公司 filed Critical 广州市永合祥自动化设备科技有限公司
Publication of WO2019041393A1 publication Critical patent/WO2019041393A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/34—Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation

Definitions

  • This invention relates to polishing apparatus, and more particularly to an abrasive polishing mechanism.
  • the traditional grinding and polishing machine is directly connected with the polishing wheel.
  • the polishing line is relatively thick, and the aperture is easily generated on the polished surface, making the polished surface look uneven, smooth and unattractive.
  • the present invention overcomes the defects of the prior art, and provides an abrasive polishing machine and an auxiliary mechanism thereof, which are difficult to leave polishing marks and effectively improve the polishing effect.
  • An abrasive polishing mechanism including
  • An indexing plate the indexing plate is provided with an adjusting hole and a plurality of positioning holes;
  • the first end surface of the sleeve is provided with a rotating shaft for connecting with the driving mechanism, and the second end surface is provided with a first shaft hole which is eccentric with the center line, and the rotating shaft and the indexing plate are rotatably connected
  • An arcuate hole is defined in the first end surface of the sleeve, and the sleeve is engaged with the positioning hole on the indexing plate by the limiting member;
  • An eccentric sleeve, an eccentric adjusting piece and a spring wherein the eccentric sleeve, the eccentric adjusting piece and the spring are disposed in the first shaft hole, and the eccentric sleeve is provided with a second shaft hole eccentric with the center line thereof, the first a bearing and a clutch adjusting block matched with the eccentric adjusting piece are disposed in the two-axis hole, the spring end is abutted on the sleeve, and the other end is abutted on the eccentric adjusting piece, and the eccentric adjusting piece is provided with a through hole;
  • a connecting shaft one end of the connecting shaft is disposed on the bearing, the clutch adjusting block and the eccentric adjusting piece, the other end is used for connecting with the polishing wheel, the clutch adjusting block is fixedly connected with the connecting shaft, the bearing and the eccentric adjusting piece are Rotatable connection with the connecting shaft;
  • a limiting post one end of the limiting post is disposed on the eccentric sleeve, and the other end is sequentially disposed in the through hole, the arc hole and the adjusting hole.
  • the eccentric adjusting piece includes an abutting disk and a coupling plate disposed on the abutting disk, the abutting disk is different from the center line of the coupling disk, and the spring abuts on the abutting disk, the coupling plate and the The clutch adjustment block cooperates, and the through hole is disposed on the abutting disk.
  • a first tapered groove is disposed on the coupling disc, and a first tapered boss is disposed in the first tapered groove, and the clutch adjustment block faces the first tapered groove toward an end surface of the eccentric adjusting piece
  • a matching tapered shape is provided, and a second tapered groove matching the first tapered boss is disposed on an end surface of the clutch adjustment block toward the eccentric tab.
  • the grinding and polishing mechanism further includes a split pin
  • the clutch adjusting block is provided with a first through hole extending through a radial line thereof in a radial direction thereof
  • the connecting shaft is provided with a through-axis thereof along a radial direction thereof a second through hole of the core wire
  • the split pin is disposed in the first through hole and the second through hole.
  • the connecting shaft includes a first shaft segment, a second shaft segment and a third shaft segment which are sequentially connected, the diameter of the first shaft segment is smaller than the diameter of the second shaft segment, and the diameter of the second shaft segment is smaller than the third shaft segment
  • the first tapered boss is provided with a first mounting hole matched with the first shaft segment
  • the second tapered groove is provided with a second mounting hole matched with the second shaft segment.
  • the bearing sleeve and the clutch adjusting block are sleeved on the second shaft section, and the first shaft section extends into the first mounting hole.
  • a accommodating groove is disposed on an end surface of the eccentric adjusting piece away from the clutch adjusting block, a fixing hole is disposed in the receiving groove, the spring is a conical spring, and a large end of the conical spring is adjacent to the eccentric adjusting piece, and The end of the large end of the conical spring is engaged in the fixing hole.
  • One end of the eccentric sleeve away from the eccentric tab is provided with a shaft seal, and the third shaft segment extends through the shaft seal to extend the eccentric sleeve.
  • a first annular groove is disposed on the inner wall of the first shaft hole adjacent to the shaft seal, a first circlip is disposed in the first annular groove, and the first circlip is blocked outside the eccentric sleeve to be the eccentric sleeve Limiting in the first shaft hole.
  • the eccentric sleeve is provided with a circlip pliers avoiding groove near the end surface of the first circlip.
  • the end surface of the connecting shaft away from the eccentric adjusting piece is provided with an internally threaded hole that is coupled with the polishing wheel.
  • the first shaft hole and the rotating shaft are different shafts, and the second shaft hole is different from the first shaft hole.
  • the driving mechanism drives the rotating shaft to rotate, the connecting shaft and the polishing wheel thereon are synchronously driven to be eccentric.
  • Figure 1 is an exploded perspective view of the polishing and polishing mechanism of the embodiment
  • Figure 2 is a schematic view of the assembly of the polishing and polishing mechanism of the embodiment
  • FIG. 3 is an exploded perspective view 2 of the polishing and polishing mechanism of the embodiment
  • Figure 5 is a schematic view showing a part of the grinding and polishing mechanism of the embodiment
  • Figure 6 is a second schematic view of the assembly of the polishing and polishing mechanism of the embodiment.
  • Figure 7 is a schematic cross-sectional view of the polishing and polishing mechanism of the embodiment.
  • FIG. 8 is a schematic plan view of the polishing and polishing mechanism according to the embodiment.
  • Figure 9 is a perspective view of the sleeve in the first position according to the embodiment.
  • Figure 10 is a perspective view of the sleeve of the present embodiment in a second position.
  • an abrasive polishing mechanism includes an indexing plate 10, and the indexing plate 10 is provided with an adjusting hole 110 and a plurality of positioning holes 120; a sleeve 20, and the sleeve
  • the first end surface is provided with a rotating shaft 210 for connecting with the driving mechanism, and the second end surface is provided with a first shaft hole 220 which is eccentric with the center line thereof.
  • the rotating shaft 210 is rotatably connected with the indexing plate 10, and the sleeve 20 is rotatably connected.
  • the eccentric sleeve 330 is provided with a second shaft hole 336 which is eccentric with the center line, and the second shaft hole 336 is provided therein.
  • the eccentric adjustment piece 320 is provided with a through hole 321 a connecting shaft 360, one end of the connecting shaft 360 is disposed on the bearing 370, the clutch adjusting block 350 and the eccentric adjusting piece 320, and the other end is connected to the polishing wheel, and the clutch adjusting block 350 is fixedly connected with the connecting shaft 360.
  • the bearing 370 and the eccentric adjusting piece 320 are rotatably connected to the connecting shaft 360.
  • the limiting post 310 has one end of the limiting post 310 disposed on the eccentric sleeve 330, and the other end is sequentially disposed on the through hole 321 and the curved hole. 230 and the adjustment hole 110.
  • the first shaft hole 220 and the rotating shaft 210 are different shafts, and the second shaft hole 336 is different from the first shaft hole 220.
  • the driving mechanism drives the rotating shaft 210 to rotate
  • the connecting shaft 360 is synchronously driven.
  • the polishing wheel thereon is eccentrically rotated. If it is necessary to adjust the radius of curvature of the polishing wheel, the limiting member is loosened to rotate the sleeve relative to the indexing plate, as shown in FIG. 8-10, and the limiting column 310 is curved.
  • the limitation of the hole can only be moved in the adjusting hole of the indexing plate, so that the eccentricity between the connecting shaft 360 and the rotating shaft 210 in the second shaft hole 336 is changed, thereby achieving the purpose of adjusting the radius of curvature of the polishing wheel.
  • the clutch adjusting block 350 fixedly connected with the connecting shaft 360 rotates relative to the eccentric adjusting piece to avoid polishing.
  • the force on the wheel is too large to cause deep polishing scratches on the polished surface, further improving the good polishing effect, reducing the swing amplitude, eliminating the aperture, and not leaving the polishing marks.
  • the eccentric adjusting piece 320 is pressed against the clutch adjusting block 350 by the spring 340 to form a clutch structure, and the spring 340 is over-adjusted to adapt to more complicated curved surface work.
  • the clutch is engaged.
  • the adjustment block 350 is slipped to rotate the clutch adjustment block 350 relative to the eccentric adjustment piece 320 to prevent the force on the polishing wheel from being too large to cause a deep polishing flaw on the polishing surface.
  • the bearing 370 is sleeved on the connecting shaft 360, the connecting shaft 360 is provided with a second circlip 380, and the second circlip 380 is located at the bearing 370.
  • the eccentric sleeve 330 is disposed on the bearing 370 and the clutch adjustment block 350.
  • the eccentric adjusting piece of the embodiment includes an abutting disk 328 and a coupling plate 329 disposed on the abutting disk 328.
  • the abutting disk 328 is different from the center line of the coupling disk 329, and the spring 340 Abutting on the abutment disk 328, the coupling disk 329 is engaged with the clutch adjustment block 350, and the through hole 321 is disposed on the abutment disk 328. That is, the abutting disk 328 is coaxially engaged with the first shaft hole 220, and the coupling disk 329 is eccentrically connected to the clutch adjusting block 350 in a half-joint manner.
  • the coupling plate 329 is provided with a first tapered groove 322, and the first tapered groove 322 is provided with a first conical projection 323, and the clutch adjustment block 350 faces the eccentricity.
  • the end surface of the adjusting piece 320 has a tapered shape matching the first tapered groove 322, and the second adjusting surface of the clutch adjusting block 350 facing the eccentric adjusting piece 320 is provided with a second cone matching the first tapered boss 323.
  • the grinding and polishing mechanism further includes a split pin 390 having a first through hole 353 extending through a radial line thereof in a radial direction thereof, the connecting shaft A second through hole 364 is formed in the radial direction of the shaft, and the through hole 390 is disposed in the first through hole 353 and the second through hole 364.
  • the clutch adjustment block 350 is fixed on the connecting shaft 360 by the split pin 390, so that the relative rotation between the clutch adjusting block 350 and the connecting shaft 360 cannot be performed.
  • the opening degree of the split pin 390 By adjusting the opening degree of the split pin 390, the connection between the two can be made.
  • the degree of tightness is adaptively adjusted, and the use is more convenient; of course, according to actual needs, the clutch adjustment block 350 and the connecting shaft 360 can be fixedly connected by other means, such as using a key or a positioning pin.
  • the connecting shaft 360 includes a first shaft segment 361, a second shaft segment 362 and a third shaft segment 363 which are sequentially connected, and the diameter of the first shaft segment 361 is smaller than the diameter of the second shaft segment 362.
  • the diameter of the second shaft segment 362 is smaller than the diameter of the third shaft segment 363, and the first tapered boss 323 is provided with a first mounting hole 324 matching the first shaft segment 361, the second cone A second mounting hole 352 is defined in the slot 351 to match the second shaft section 362.
  • the second shaft section 362 is provided with a second annular groove 3622 in the middle.
  • the second retaining spring 380 is disposed in the annular groove.
  • the bearing 370 is sleeved on the second shaft section 362 and located between the third shaft section 363 and the second circlip spring 380.
  • the clutch adjustment block 350 is sleeved on the second shaft section 362 and located on the first shaft. Between the segment 361 and the second circlip 380, and the clutch adjustment block 350 is fixed to the second shaft segment 362 by a split pin 390, the first shaft segment 361 extends into the first mounting hole 324.
  • the connecting shaft 360 is set as three shaft segments having different diameters, and the positioning and positioning are performed by the joints of the different shaft segments, the bearing 370 is limited by the third shaft segment 363, and the first shaft segment 361 extends into the first mounting hole.
  • the depth of 324 is limited by the end face of the second shaft section 362, so that assembly of each part can be realized quickly and accurately, and assembly efficiency and accuracy are improved.
  • the eccentricity adjusting piece 320 is provided with a receiving groove 325 on the end surface of the clutch adjusting block 350.
  • the receiving groove 325 is provided with a fixing hole 326.
  • the spring 340 is a conical spring.
  • the large end of the conical spring is adjacent to the eccentric tab 320, and the end of the large end of the conical spring is engaged in the fixing hole 326.
  • one end of the eccentric sleeve 330 away from the eccentric adjustment piece 320 is provided with a shaft seal 332 , and the third shaft section 363 extends through the shaft seal 332 to extend out the eccentric sleeve 330 , and A threaded hole is formed in an end surface of the connecting shaft 360 away from the eccentric adjusting piece 320.
  • the inside of the eccentric sleeve 330 is protected by the shaft seal 332, and dust or the like is prevented from being subjected to internal parts.
  • the threaded holes are internally threaded holes for connecting the polishing wheel.
  • the grinding and polishing mechanism further includes a first circlip 50.
  • the first end of the first shaft hole 220 away from the rotating shaft 210 is provided with a first annular groove 222, and the first circlip 50 is disposed.
  • the first circlip 50 is blocked from the eccentric sleeve 330 to limit the eccentric sleeve 330 Positioned within the first shaft hole 220.
  • the eccentric sleeve 330 is restrained in the sleeve 20 by the first circlip spring 50, so that the eccentric sleeve 330 and the sleeve 20 can be rotated relative to each other without axial movement.
  • connection manner is not limited to
  • the first circlip 50 is limited in position, and the eccentric sleeve 330 can be restrained in the sleeve 20 by using an end cover such as a hole.
  • the eccentric bushing 330 is further provided with a circlip pliers avoiding groove 334 near the end surface of the first circlip spring 50.
  • the limiting member 40 includes a positioning bead 410, a fixing base 420, an elastic member 430 and an adjusting pin 440.
  • the fixing base 420 is fixed on the outer wall of the sleeve 20 and adjacent to In the indexing plate 10, the end surface of the fixing base 420 near the sleeve 20 is a bottom end, and the bottom end of the fixing base 420 is provided with a mounting groove 422, and the bottom wall of the mounting groove 422 is provided with a through hole.
  • a third through hole 424 is defined in the mounting slot 422.
  • the adjusting slot 426 is disposed in the mounting slot 422 and is adjusted.
  • the top end of the pin 440 protrudes from the third through hole 424, and the elastic member 430 is located between the outer wall of the sleeve 20 and the bottom end of the adjusting pin 440.
  • the positioning bead 410 The positioning hole 426 is partially inserted into the positioning hole 120 of the indexing plate 10 when the adjusting pin 440 is loosened.
  • the fixing seat 420 is provided with a bump on both sides of the fixing base 420.
  • the screw passes through the protrusion to lock the fixing base 420 outside the sleeve 20, and the outer wall of the sleeve 20 contacting the fixing seat 420 is a plane, and the plane is A threaded hole matching the screw is provided, and a groove matching the bottom end of the adjusting pin 440 is further disposed on the plane, and the bottom wall of the groove is provided with a blind hole matched with the elastic member 430 for adjusting the pin
  • the 440 and the elastic member 430 are positioned.
  • the top end of the adjusting pin 440 is pressed. Since the elastic member 430 is disposed between the adjusting pin 440 and the outer wall of the sleeve 20, the elastic member 430 is compressed during pressing, and the adjusting pin 440 is axially The direction movement changes its contact position with the positioning post, so that the positioning space is allowed to enter the positioning post in the mounting groove 422, and the connection restriction between the sleeve 20 and the indexing plate 10 is released, so that the sleeve 20 can be relatively indexed.
  • the adjusting pin 440 is released, the adjusting pin 440 is automatically returned by the elastic member 430, and the positioning bead 410 is synchronously pushed during the returning process, so that a part of the positioning bead 410 enters the current position.
  • the sleeve 20 is caught by the positioning post on the indexing plate 10, so that the sleeve 20 cannot rotate relative to the indexing plate 10.
  • the limit structure can be locked and released in a convenient and fast state. The operation is efficient and efficient.
  • the limiting member 40 of other structures can also be used to switch both the sleeve 20 and the indexing plate 10 in a state of relative rotation and non-relative rotation, such as a projection on the sleeve 20.
  • a protruding hole corresponding to the positioning hole 120 is disposed on the protruding portion.
  • the elastic member 430 is a telescopic spring, and other components capable of realizing the rebound function can be selected according to actual needs.
  • the bottom end of the adjusting pin 440 is provided with a positioning slot 441.
  • the elastic member 430 extends into the positioning slot 441 and abuts against the bottom wall of the positioning slot 441.
  • the elastic member 430 is guided while being positioned in the groove.
  • the adjustment pin 440 of the embodiment includes a first pin segment 442, a second pin segment 444 and a third pin segment 446 which are sequentially connected, and the first pin segment 442 extends the third pass.
  • the hole 424 is pressed against the elastic member 430, and the diameter of the second pin segment 444 is gradually increased from the first pin segment 442 to the third pin segment 446.
  • the second pin segment 444 has a small tapered shape with a large end and a bottom end. When the first pin segment 442 is not pressed, the large end of the second pin segment 444 abuts the positioning bead 410 to be pushed into the positioning hole 120, and presses the first pin.
  • the adjustment pin 440 can also adopt a convex hull structure in which a circular arc transition is arranged in the middle, and the positioning bead 410 is pressed by the convex hull.
  • the polishing and polishing mechanism further includes a transition joint 60 and a third retaining spring 70.
  • the indexing disc 10 is provided with a connecting hole 140, and the rotating shaft 210
  • the other end of the transition connector 60 is connected to the main body of the polishing machine, and the other end of the rotating shaft 210 is adjacent to the outer wall of one end of the transition connector 60. 212 .
  • the third circlip 70 is disposed in the third annular groove 212 , and the third circlip 70 is blocked outside the indexing plate 10 .
  • the transition joint 60 is a structure with a threaded intermediate hexagonal disc at the middle ends, one end is used for screwing with the rotating shaft 210, the other end is for connecting with the polishing machine main body, and the indexing disc 10 is restricted by the third circlip 70.
  • the axial movement makes the indexing plate 10 and the sleeve 20 close to each other and can only rotate relative to each other. As shown in FIG. 6 and FIG.
  • a groove 130 is defined in an end surface of the indexing disk 10 adjacent to the third circlip 70, and the connecting hole 140 is disposed in the groove 130, and the groove 130 is
  • Two limiting stations 132 are disposed on the inner wall along the circumferential direction thereof, and the two ends of the third card spring 70 are located between the two limiting stations 132. Through the limit station 132 The range of rotation of the third circlip 70 is restricted, and the friction with the indexing disk 10 is reduced.
  • the adjustment hole 110 includes an inner hole 112 and an outer hole 114.
  • the inner hole 112 is closer to the rotating shaft 210 than the outer hole 114, and the inner hole 112 and the outer hole 114 have larger diameters.
  • the diameter of the limiting pin, the inner hole 112 and the outer hole 114 are in transient communication.
  • the adjusting hole 110 has to satisfy the limitation of the limiting pin, and the adjusting hole 110 cannot interfere with the limiting pin when the sleeve 20 rotates to change the eccentricity with respect to the indexing plate 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

Mécanisme de rodage et de polissage comprenant une plaque d'indexation (10), une douille (20), un manchon excentrique (330), une pièce de réglage excentrique (320), un ressort (340), une colonne de limitation de position (310) et un arbre de liaison (360). Le manchon excentrique (330), la pièce de réglage excentrique (320) et le ressort (340) sont tous disposés dans un premier trou d'arbre (220) de la douille (20). Un palier (370) et un bloc de réglage d'embrayage (350) sont disposés dans un second trou d'arbre (336) du manchon excentrique (330), le bloc de réglage d'embrayage (350) venant en prise avec la pièce de réglage excentrique (320). Une première extrémité du ressort (340) vient en butée contre la douille (20), et l'autre extrémité vient en butée contre la pièce de réglage excentrique (320). La pièce de réglage excentrique (320) est pourvue d'un trou traversant (321). L'arbre de liaison (360) traverse le palier (370), le bloc de réglage d'embrayage (350) et la pièce de réglage excentrique (320). Le bloc de réglage d'embrayage (350) est relié à demeure à l'arbre de liaison (360). Le palier (370) et la pièce de réglage excentrique (320) sont reliés rotatifs à l'arbre de liaison (360). Une première extrémité de la colonne de limitation de position (310) est disposée sur le manchon excentrique (330), et l'autre extrémité passe de manière séquentielle à travers le trou traversant (321), un trou en forme d'arc (230), et un trou de réglage (110). L'invention peut régler le rayon de courbure de la rotation de la roue de polissage, et empêcher une force excessive exercée sur la roue de polissage pendant le polissage de provoquer une rayure profonde sur une surface polie, ce qui permet d'améliorer les effets de polissage et d'éliminer les défauts de polissage.
PCT/CN2017/102092 2017-08-31 2017-09-18 Mécanisme de rodage et de polissage WO2019041393A1 (fr)

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CN201721119601.XU CN207127715U (zh) 2017-08-31 2017-08-31 研磨抛光机构
CN201721119601.X 2017-08-31

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CN111377195A (zh) * 2020-03-10 2020-07-07 中冶陕压重工设备有限公司 一种辊轮高度可调的皮带运输机及其安装方法

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CN107457690B (zh) * 2017-08-31 2018-06-29 广州市永合祥自动化设备科技有限公司 研磨抛光机及其辅助机构
CN207127699U (zh) * 2017-08-31 2018-03-23 广州市永合祥自动化设备科技有限公司 抛光机及其旋转定位机构
CN109570643B (zh) * 2018-12-20 2019-10-29 大连理工大学 一种高精度齿轮齿面展成抛光装置
CN110480494A (zh) * 2019-08-16 2019-11-22 广州市协辉精密机械设备有限公司 一种适用于抛光行业的多功能转接头

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CN107457690A (zh) * 2017-08-31 2017-12-12 广州市永合祥自动化设备科技有限公司 研磨抛光机及其辅助机构
CN207127699U (zh) * 2017-08-31 2018-03-23 广州市永合祥自动化设备科技有限公司 抛光机及其旋转定位机构

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* Cited by examiner, † Cited by third party
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CN111377195A (zh) * 2020-03-10 2020-07-07 中冶陕压重工设备有限公司 一种辊轮高度可调的皮带运输机及其安装方法
CN111377195B (zh) * 2020-03-10 2024-06-04 中冶陕压重工设备有限公司 一种辊轮高度可调的皮带运输机及其安装方法

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