CN111634810A - Safe type electric block convenient to cooling - Google Patents

Safe type electric block convenient to cooling Download PDF

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Publication number
CN111634810A
CN111634810A CN202010513366.4A CN202010513366A CN111634810A CN 111634810 A CN111634810 A CN 111634810A CN 202010513366 A CN202010513366 A CN 202010513366A CN 111634810 A CN111634810 A CN 111634810A
Authority
CN
China
Prior art keywords
fixedly connected
heat dissipation
rotating motor
motor
shell
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
CN202010513366.4A
Other languages
Chinese (zh)
Inventor
张景东
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.)
Victory Technology Jiangsu Co ltd
Original Assignee
Victory Technology Jiangsu Co 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 Victory Technology Jiangsu Co ltd filed Critical Victory Technology Jiangsu Co ltd
Priority to CN202010513366.4A priority Critical patent/CN111634810A/en
Publication of CN111634810A publication Critical patent/CN111634810A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00Trolleys or crabs, e.g. operating above runways
    • B66C11/16Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear
    • B66C11/18Rope, cable, or chain drives for trolleys; Combinations of such drives with hoisting gear comprising endless ropes or cables
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/02Travelling gear incorporated in or fitted to trolleys or cranes for underhung trolleys or cranes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28Other constructional details
    • B66D1/36Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B66D1/38Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains by means of guides movable relative to drum or barrel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/18Power-operated hoists
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/18Power-operated hoists
    • B66D3/26Other details, e.g. housings
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/02Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/19Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)

Abstract

The invention discloses a safety electric hoist convenient for cooling, wherein a cavity is arranged in a shell, one end of the shell is fixedly connected with a rotating motor, the input end of the rotating motor is electrically connected with the output end of an external power supply, the outer end of the rotating motor is fixedly connected with a heat dissipation mechanism, the heat dissipation mechanism comprises an air inlet channel, an air outlet, a filter screen, a heat dissipation plate, a mounting groove, a cooling pipe, a placing box, a liquid box and a blowing motor, the safety electric hoist is scientific and reasonable in structure and safe and convenient to use, and is provided with the air inlet channel, the filter screen, the heat dissipation plate, the mounting groove, the cooling pipe, the placing box, the liquid box and the blowing motor, external wind can conveniently enter the rotating motor through the air inlet channel so as to dissipate heat of the rotating motor, meanwhile, heat generated by the rotating motor through the heat dissipation, the heat on the heat dissipation plate is replaced.

Description

Safe type electric block convenient to cooling
Technical Field
The invention relates to the technical field of electric hoists, in particular to a safe electric hoist convenient to cool.
Background
The electric hoist is a special hoisting device, is arranged on a crown block and a gantry crane, has the characteristics of small volume, light dead weight, simple operation, convenient use and the like, and is used for industrial and mining enterprises, storage, docks and other places;
however, in the operation process of the existing electric hoist, the heat generated by the rotation of the motor cannot be dissipated outwards, so that the temperature of the motor is too high, the normal operation of the electric hoist is affected, and the working efficiency is reduced.
Disclosure of Invention
The invention provides a safe electric hoist convenient to cool, which can effectively solve the problems that the temperature of a motor is too high, the normal operation of the electric hoist is influenced and the working efficiency is reduced because the heat generated by the rotation of the motor cannot be dissipated outwards in the operation process in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a safety electric hoist convenient to cool comprises a shell, wherein a cavity is formed in the shell, one end of the shell is fixedly connected with a rotating motor, the input end of the rotating motor is electrically connected with the output end of an external power supply, a rope is sleeved in the cavity corresponding to the output shaft of the rotating motor, one end of the outer end of the rope, away from a rotating rod, is fixedly connected with a lifting hook, and the outer end of the rotating motor is fixedly connected with a heat dissipation mechanism;
the heat dissipation mechanism comprises an air inlet channel, an air outlet, a filter screen, a heat dissipation plate, a mounting groove, a cooling pipe, a placing box, a liquid box and a blowing motor;
one end of the rotating motor is fixedly connected with an air inlet channel, one end, close to the air inlet channel, of the outer end of the rotating motor is uniformly provided with air outlets, the outer end of the rotating motor is uniformly and fixedly connected with a heat dissipation plate, one end of the heat dissipation plate is provided with a mounting groove, a cooling pipe is clamped inside the mounting groove, the top end of the rotating motor is fixedly connected with a placing box, the bottom position of the inner wall of the placing box is fixedly connected with a liquid box, the position, corresponding to the top position of the liquid box, inside the placing box is fixedly connected with a blowing motor, and the input;
the shell top fixedly connected with fixing base, the recess has been seted up on the fixing base top, the inside embedding of recess has moving mechanism.
Preferably, the moving mechanism comprises a sliding chute, a clamping block, a movable plate, a connecting plate, a bearing roller, a driving motor, a nut and a screw rod;
the recess inner wall symmetry has seted up the spout, two the inside equal sliding clamping of spout has the fixture block, two the equal fixedly connected with fly leaf of the adjacent one end of fixture block, fly leaf top symmetry fixedly connected with connecting plate, connecting plate one end symmetry is rotated and is connected with the bearing roller, the connecting plate other end corresponds bearing roller position department fixedly connected with driving motor, and driving motor's input and external power source's output electrical property even, fixing base both ends symmetry is rotated and is connected with the nut, two the equal fixedly connected with lead screw of the adjacent one end of nut.
Preferably, place the case top and seted up the notch, and place the equal fixedly connected with filter screen of incasement wall and inlet air duct inner wall, liquid incasement portion packs has the coolant liquid.
Preferably, the number of the bearing rollers is four, and the outer ends of the rotating shafts of the two bearing rollers positioned at the inner side of the connecting plate are sleeved with the belt.
Preferably, the inner wall fixed connection of fixing base and fly leaf and two nuts is run through respectively at the lead screw both ends, the lead screw is double-end lead screw, and the direction of rotation of lead screw both ends screw thread is opposite, the lead screw outer end passes through threaded connection with the fly leaf inner wall.
Preferably, the housing is fixedly connected with a support, a rectangular groove is formed in the middle of the support, the rectangular groove is symmetrically and slidably connected with the wire guide plates, and the adjacent ends of the two wire guide plates are rotatably connected with the idler wheels.
Preferably, the other end of the rope bypasses the lifting hook and is fixedly connected with the bottom end of the shell, and the rope penetrates through the wire guide plate.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use:
1. be provided with inlet air channel, the filter screen, the heating panel, the mounting groove, the cooling tube, place the case, liquid tank and blower motor, it is inside that convenient external wind gets into the rotating electrical machines through inlet air channel, thereby the rotating electrical machines dispels the heat, the heat that produces the rotating electrical machines through the heating panel simultaneously conducts, simultaneously derive the coolant liquid of liquid tank inside through the cooling tube, heat to on the heating panel is replaced, radiating efficiency has been improved, avoid the rotating electrical machines temperature to rise, the operation of assurance rotating electrical machines, in addition cool down the liquid tank through blower motor, improve the cooling rate of the inside coolant liquid of liquid tank.
2. Be provided with the spout, the fixture block, the fly leaf, the connecting plate, the bearing roller, driving motor, nut and lead screw, through rotating the nut, it is rotatory to make the nut drive the lead screw, thereby make the lead screw promote two fly leaves and remove, make the fly leaf drive the connecting plate and remove, reduce the distance between the bearing roller, and then make the bearing roller cooperation, the centre gripping is on the I-shaped guide rail, electric block's installation has been made things convenient for, simultaneously through draw-in groove and spout cooperation, the stability of fly leaf has further been improved, the effect of support is increased, through driving motor and belt cooperation, drive the same rotation of bearing roller, and then avoid electric block to appear the skew when removing.
3. Be provided with rope, support, rectangular channel, wiring board and gyro wheel, carry out spacing guide to the rope through the wiring board, avoid the rope intertwine together, guaranteed receiving and releasing of rope, simultaneously through the cooperation of rectangular channel and gyro wheel, make the wiring board can be along with receiving and releasing of rope, the position of adjustment wiring board has guaranteed spacing effect, has increased the adaptability of wiring board.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the mounting structure of the cooling tube of the present invention;
FIG. 3 is a schematic view of the mounting structure of the movable plate of the present invention;
fig. 4 is a schematic view of the installation structure of the wire guide plate of the present invention;
reference numbers in the figures: 1. a housing; 2. a chamber; 3. a rotating electric machine;
4. a heat dissipation mechanism; 401. an air inlet channel; 402. an air outlet; 403. a filter screen; 404. a heat dissipation plate; 405. mounting grooves; 406. a cooling tube; 407. placing a box; 408. a liquid tank; 409. a blower motor;
5. a fixed seat; 6. a groove;
7. a moving mechanism; 701. a chute; 702. a clamping block; 703. a movable plate; 704. a connecting plate; 705. a bearing roller; 706. a drive motor; 707. a nut; 708. a screw rod;
8. a rope; 9. a hook; 10. a support; 11. a rectangular groove; 12. a wire guide plate; 13. and a roller.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example (b): as shown in fig. 1-4, the invention provides a technical scheme, a safety electric hoist convenient for cooling comprises a housing 1, a cavity 2 is arranged in the housing 1, one end of the housing 1 is fixedly connected with a rotating motor 3, an input end of the rotating motor 3 is electrically connected with an output end of an external power supply, an output shaft of the rotating motor 3 is sleeved with a rope 8 corresponding to the interior of the cavity 2, one end of the outer end of the rope 8, which is far away from a rotating rod 3, is fixedly connected with a lifting hook 9, and the outer end of the rotating motor 3 is fixedly connected with a heat dissipation mechanism;
the heat dissipation mechanism 4 comprises an air inlet channel 401, an air outlet 402, a filter screen 403, a heat dissipation plate 404, a mounting groove 405, a cooling pipe 406, a placing box 407, a liquid box 408 and a blowing motor 409;
an air inlet channel 401 is fixedly connected to one end of a rotary motor 3, air outlets 402 are uniformly formed in the outer end of the rotary motor 3 close to one end of the air inlet channel 401, a heat dissipation plate 404 is uniformly and fixedly connected to the outer end of the rotary motor 3, a mounting groove 405 is formed in one end of the heat dissipation plate 404, a cooling pipe 406 is clamped in the mounting groove 405, a placing box 407 is fixedly connected to the top end of the rotary motor 3, a liquid box 408 is fixedly connected to the bottom position of the inner wall of the placing box 407, in order to improve the heat dissipation effect, a notch is formed in the top end of the placing box 407, a filter screen 403 is fixedly connected to the inner wall of the placing box 407 and the inner wall of the air inlet channel 401, cooling liquid is filled in the liquid box 408;
the top end of the shell 1 is fixedly connected with a fixed seat 5, the top end of the fixed seat 5 is provided with a groove 6, and a moving mechanism 7 is embedded in the groove 6;
the moving mechanism 7 comprises a sliding groove 701, a clamping block 702, a movable plate 703, a connecting plate 704, a bearing roller 705, a driving motor 706, a nut 707 and a screw rod 708;
the inner wall of the groove 6 is symmetrically provided with sliding grooves 701, the insides of the two sliding grooves 701 are respectively connected with clamping blocks 702 in a sliding and clamping manner, the adjacent ends of the two clamping blocks 702 are respectively fixedly connected with a movable plate 703, the top end of the movable plate 703 is symmetrically fixedly connected with a connecting plate 704, one end of the connecting plate 704 is symmetrically and rotatably connected with bearing rollers 705, in order to enable the bearing rollers 705 to rotate together, the number of the bearing rollers 705 is four, the outer ends of the rotating shafts of the two bearing rollers 705 positioned at the inner side of one connecting plate 704 are sleeved with belts, the other end of the connecting plate 704 is fixedly connected with a driving motor 706 corresponding to the position of the bearing rollers 705, the input end of the driving motor 706 is electrically connected with the output end of an external power supply, the two ends of the fixed seat 5 are symmetrically and rotatably connected with nuts 707, the rotating directions of the threads at the two ends of the screw rod 708 are opposite, the outer end of the screw rod 708 is connected with the inner wall of the movable plate 703 through threads, and the adjacent ends of the two nuts 707 are fixedly connected with the screw rod 708;
avoid 8 twines of rope to be in the same place, rectangular channel 11 has been seted up to 10 middle part positions of support department, and 11 inside symmetry sliding connection in rectangular channel have wire guide 12, in order to carry on spacingly to rope 8, the lifting hook 9 and 1 bottom fixed connection of shell are walked around to the 8 other ends of rope, and rope 8 passes wire guide 12, and two wire guide 12 adjacent one ends all rotate and are connected with gyro wheel 13.
The working principle and the using process of the invention are as follows: in the process of using the safe electric hoist convenient for cooling, firstly, outside air enters the rotary motor 3 through the air inlet channel 401 and is blown out from the air outlet 402, so that the temperature inside the rotary motor 3 is taken away, the cooling effect is achieved, the temperature rise of the rotary motor 3 is avoided, the use is not influenced, the operation of the electric nursing hoist is ensured, in addition, heat generated by the rotary motor 3 is conducted through the heat dissipation plate 404, meanwhile, cooling liquid inside the liquid tank 408 is led out through the cooling pipe 406, heat exchange is carried out on the heat dissipation plate 404, the heat dissipation efficiency is improved, in addition, the cooling liquid inside the liquid tank 408 is blown through the blowing motor 409 for heat dissipation, the temperature of the cooling liquid can be rapidly cooled, and the heat exchange efficiency is ensured;
then, the nut 707 is rotated to enable the nut 707 to drive the screw rod 708 to rotate, so that the screw rod 708 drives the two connecting plates 704 to move, the connecting plates 704 drive the bearing rollers 705 to move, the distance between the bearing rollers 705 on the two sides is reduced, and the bearing rollers are clamped on the I-shaped guide rail, the installation efficiency of the electric hoist is improved, the bearing rollers 705 are driven to rotate by the driving motor 706, meanwhile, the bearing rollers 705 can rotate together through belt transmission, the electric hoist is ensured not to deviate when moving, in addition, the screw rod 708 drives the movable plate 703 by reversely rotating the nut 707, the distance between the bearing rollers 705 on the two sides is further increased, the clamping of the bearing rollers 705 is released, and the electric hoist is convenient to detach from the I-shaped guide rail;
finally, rotatory at the rotating electrical machines, receive and release rope 8, carry out spacing guide to rope 8 through wire guide 12 simultaneously to avoid rope 8 to intertwine together, guaranteed the effect of the rolling of rope 8, drive wire guide 12 through gyro wheel 13 simultaneously and slide along rectangular channel 11, make wire guide 12 can be along with the spacing position of the receipts and release adjustment of rope 8, and then guaranteed wire guide 12's spacing effect.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides a safe type electric block convenient to cooling, includes shell (1), its characterized in that: a cavity (2) is formed in the shell (1), one end of the shell (1) is fixedly connected with a rotating motor (3), the input end of the rotating motor (3) is electrically connected with the output end of an external power supply, a rope (8) is sleeved in the output shaft of the rotating motor (3) corresponding to the cavity (2), one end, far away from the rotating rod (3), of the outer end of the rope (8) is fixedly connected with a lifting hook (9), and the outer end of the rotating motor (3) is fixedly connected with a heat dissipation mechanism (4);
the heat dissipation mechanism (4) comprises an air inlet channel (401), an air outlet (402), a filter screen (403), a heat dissipation plate (404), a mounting groove (405), a cooling pipe (406), a placing box (407), a liquid box (408) and a blowing motor (409);
an air inlet channel (401) is fixedly connected to one end of the rotating motor (3), air outlets (402) are uniformly formed in one end, close to the air inlet channel (401), of the outer end of the rotating motor (3), a heat dissipation plate (404) is uniformly and fixedly connected to the outer end of the rotating motor (3), a mounting groove (405) is formed in one end of the heat dissipation plate (404), a cooling pipe (406) is clamped in the mounting groove (405), a placing box (407) is fixedly connected to the top end of the rotating motor (3), a liquid box (408) is fixedly connected to the bottom of the inner wall of the placing box (407), a blowing motor (409) is fixedly connected to the position, corresponding to the top of the liquid box (408), in the placing box (407), and the input end of the blowing motor (409;
the improved structure is characterized in that a fixing seat (5) is fixedly connected to the top end of the shell (1), a groove (6) is formed in the top end of the fixing seat (5), and a moving mechanism (7) is installed in the groove (6) in an embedded mode.
2. The safety electric hoist convenient to cool down of claim 1, characterized in that: the moving mechanism (7) comprises a sliding groove (701), a clamping block (702), a movable plate (703), a connecting plate (704), a bearing roller (705), a driving motor (706), a nut (707) and a screw rod (708);
the groove (6) inner wall symmetry has seted up spout (701), two inside equal sliding joint of spout (701) has fixture block (702), two equal fixedly connected with fly leaf (703) of the adjacent one end of fixture block (702), fly leaf (703) top symmetry fixedly connected with connecting plate (704), connecting plate (704) one end symmetry rotation is connected with bearing roller (705), the connecting plate (704) other end corresponds bearing roller (705) position department fixedly connected with driving motor (706), and the input of driving motor (706) links to each other with external power source's output electrical property, fixing base (5) both ends symmetry rotation is connected with nut (707), two the equal fixedly connected with lead screw (708) of the adjacent one end of nut (707).
3. The safety electric hoist convenient to cool down of claim 1, characterized in that: place case (407) top and seted up the notch, and place equal fixedly connected with filter screen (403) of case (407) inner wall and inlet air duct (401) inner wall, liquid tank (408) inside packing has the coolant liquid.
4. The safety electric hoist convenient to cool down of claim 2, characterized in that: the number of the bearing rollers (705) is four, and the outer ends of the rotating shafts of the two bearing rollers (705) positioned at the inner side of the connecting plate (704) are sleeved with belts.
5. The safety electric hoist convenient to cool down of claim 2, characterized in that: two ends of the screw rod (708) respectively penetrate through the fixed seat (5) and the movable plate (703) to be fixedly connected with the inner walls of the two nuts (707), the screw rod (708) is a double-head screw rod, the rotating directions of threads at two ends of the screw rod (708) are opposite, and the outer end of the screw rod (708) is connected with the inner wall of the movable plate (703) through threads.
6. The safety electric hoist convenient to cool down of claim 1, characterized in that: the wire guide plate is characterized in that a support (10) is fixedly connected to the shell (1), a rectangular groove (11) is formed in the middle of the support (10), wire guide plates (12) are symmetrically and slidably connected to the inside of the rectangular groove (11), and idler wheels (13) are rotatably connected to the adjacent ends of the two wire guide plates (12).
7. The safety electric hoist convenient to cool down of claim 5, characterized in that: the other end of the rope (8) bypasses the lifting hook (9) and is fixedly connected with the bottom end of the shell (1), and the rope (8) penetrates through the wire guide plate (12).
CN202010513366.4A 2020-06-08 2020-06-08 Safe type electric block convenient to cooling Pending CN111634810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010513366.4A CN111634810A (en) 2020-06-08 2020-06-08 Safe type electric block convenient to cooling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010513366.4A CN111634810A (en) 2020-06-08 2020-06-08 Safe type electric block convenient to cooling

Publications (1)

Publication Number Publication Date
CN111634810A true CN111634810A (en) 2020-09-08

Family

ID=72326281

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010513366.4A Pending CN111634810A (en) 2020-06-08 2020-06-08 Safe type electric block convenient to cooling

Country Status (1)

Country Link
CN (1) CN111634810A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113162303A (en) * 2021-04-30 2021-07-23 八达机电有限公司 Multifunctional electric hoist
CN114506786A (en) * 2020-11-14 2022-05-17 信华智能装备(江苏)有限公司 Electric hoist mounting mechanism and electric hoist with same
CN117142343A (en) * 2023-10-30 2023-12-01 河南省华中起重机集团有限公司 Electric hoist of European crane

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114506786A (en) * 2020-11-14 2022-05-17 信华智能装备(江苏)有限公司 Electric hoist mounting mechanism and electric hoist with same
CN113162303A (en) * 2021-04-30 2021-07-23 八达机电有限公司 Multifunctional electric hoist
CN117142343A (en) * 2023-10-30 2023-12-01 河南省华中起重机集团有限公司 Electric hoist of European crane
CN117142343B (en) * 2023-10-30 2024-01-05 河南省华中起重机集团有限公司 Electric hoist of European crane

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