An extra large cargo elevator

Abstract

The invention discloses an extra-large load freight elevator, belonging to the technical field of freight elevators, comprising a shaft, a plurality of car tracks, a car frame, a car, a car top frame and a traction machine, wherein the plurality of car tracks are vertically installed in the shaft, the two sides of the car frame are slidably matched with the car tracks, the car is installed in the car frame, the car top frame is located above the shaft, the traction machine is fixedly installed on the car top frame, and the traction machine and the car frame are connected by a traction rope; by configuring a plurality of brakes on the traction machine, and by connecting the action switches of the plurality of brakes to the synchronous frame, when the traction machine needs to be braked, the synchronous motor rotates, drives the rope wheel to rotate, the pull rope is wound on the rope wheel, the extension pull rod is pulled to slide along the limit sliding sleeve, the reset spring is compressed, the first connecting ring and the second connecting ring drive the action switches of all brakes to act synchronously, clamp the corresponding brake discs, and stop the rotation of the traction main machine and the traction wheel, thereby ensuring the synchronization and reliability of the braking of the traction machine.

Description

Technical Field

[0001] The invention belongs to the technical field of freight elevators, and in particular relates to an extra-large load-carrying freight elevator. Background Art

[0002] In modern industry, logistics, warehousing and large commercial facilities, oversized freight elevators play a vital role. They are specially designed to carry cargo that is much heavier than normal weights and meet the vertical transportation needs of heavy cargo. Compared with traditional freight elevators, oversized freight elevators have a larger rated load capacity, so corresponding configurations are required for their safe operation.

[0003] Previously, the extra-large load freight elevator with patent publication number CN119263029A can drive all the elevator lock shafts to be inserted into the corresponding maintenance elevator lock holes through the linkage between the elevator lock control mechanism, the elevator lock drive shaft and the elevator lock linkage mechanism to complete the locking action of the freight elevator car, effectively simplifying the elevator lock process and reducing the operating burden of maintenance workers. At the same time, it ensures the stability and safety of the freight elevator car during the maintenance process, thereby improving the efficiency and safety of the overall maintenance operation.

[0004] In further tests and applications, it was found that the rated load weight of the extra-large load freight elevator is large, the performance requirements of the traction machine are high, and the braking force required to stop the freight elevator is large, so it is also necessary to configure it with a safe and reliable braking device. Summary of the invention

[0005] In order to overcome the deficiencies of the prior art, the present invention provides an extra-large load-bearing freight elevator.

[0006] The technical solution adopted by the present invention to solve its technical problem is:

[0007] An extra-large load freight elevator comprises a hoistway, a plurality of car rails, a car frame, a car, a car top frame and a traction machine, wherein the plurality of car rails are vertically installed in the hoistway, the two sides of the car frame are slidably matched with the car rails, the car is installed in the car frame, the car top frame is located above the hoistway, the traction machine is fixedly installed on the car top frame, and the traction machine and the car frame are connected by a traction rope;

[0008] The traction machine comprises a traction main machine, a rotating shaft bracket, a traction wheel, two brake discs, two mounting discs and a plurality of brakes. The rotating shaft of the traction main machine is supported by the rotating shaft bracket, and the rotating shaft of the traction main machine can rotate relative to the rotating shaft bracket; the traction wheel and the two brake discs are both mounted on the outer wall of the rotating shaft of the traction main machine, the two brake discs are respectively located on the outer sides of the two end surfaces of the traction wheel, the two mounting discs are respectively located on the side of the two brake discs facing away from the traction wheel, and the outer circumferences of the two mounting discs are circumferentially fixed with a plurality of brakes, and the brakes are adapted to the brake discs;

[0009] The traction machine includes a synchronous frame, a limit sleeve, a reset spring, a pull rope, a rope pulley and a synchronous motor. The synchronous frame includes a first connecting ring, a second connecting ring, a connecting rod, an extension pull rod, a rotating swing rod and a rotating ring. The first connecting ring and the second connecting ring are arranged in parallel. The first connecting ring is connected to the action switches of all brakes on one of the mounting plates, and the second connecting ring is connected to the action switches of all brakes on the other mounting plate. The two ends of the connecting rod are respectively connected to the first connecting ring and the second connecting ring; one end of the extension pull rod is connected to the end of the first connecting ring, and the other end is connected along the first The circumferential extension line of the connecting ring extends; one end of the rotating rocker arm is connected to the end of the first connecting ring, and the other end is extended radially along the first connecting ring to connect the rotating ring, the rotating ring is sleeved on the outer wall of the rotating shaft of the traction main machine, and the rotating ring can rotate relative to the rotating shaft of the traction main machine; the extension rod enters into the limiting sleeve to fit, and the return spring is arranged in the limiting sleeve; one end of the return spring is connected to the extension rod, and the other end is connected to the limiting sleeve; one end of the pull rope is connected to the other end of the extension rod, and the other end is wound and connected to the pulley, and the pulley is installed on the rotating shaft of the synchronous motor.

[0010] In the present invention, the brake includes a controller, a rear brake plate, a rear brake pad, a fixed plate, a front brake plate and a front brake pad. The controller, the rear brake plate, the fixed plate and the front brake plate are fixedly connected in sequence. The fixed plate is fixedly connected to the mounting plate. The rear brake pad and the front brake pad are respectively installed on the opposite sides of the rear brake plate and the front brake plate. The rear brake pad and the front brake pad are spaced to form a braking interval that can accommodate the brake disc, and the outer periphery of the brake disc enters the braking interval.

[0011] In the present invention, a rear positioning member is provided on the rear brake plate, and the rear positioning member includes an adjustment plate surface installed in contact with the rear brake plate and an extension plate surface abutting against the fixed plate, the extension plate surface is vertically arranged to the adjustment plate surface, one end of the extension plate surface protrudes from the end surface of the adjustment plate surface and extends toward the fixed plate, an adjustment hole is provided on the adjustment plate surface, and the rear positioning member is fixedly connected to the rear brake plate after an adjustment bolt passes through the adjustment hole, and the adjustment hole extends along the distance direction between the rear brake plate and the fixed plate.

[0012] In the present invention, a front positioning member is provided on the front brake plate. The structure of the front positioning member is the same as that of the rear positioning member. The front positioning member is used to determine the distance between the front brake plate and the fixing plate.

[0013] In the present invention, a displacement sensor is provided on the controller, and a signal collection end of the displacement sensor is connected to the rear brake pad.

[0014] In the present invention, two displacement sensors are provided, and the two displacement sensors are separately connected to the two end portions of the rear brake pad.

[0015] In the present invention, an elastic positioning member is provided on the side of the mounting plate facing the rotating swing arm, and the elastic positioning member can be elastically telescopically moved on the side facing the rotating swing arm. A positioning hole capable of cooperating with the elastic positioning member is provided on the rotating swing arm.

[0016] In the present invention, the elastic positioning member includes a telescopic head, a telescopic spring, a mounting stud and a rear end cover, the outer wall of the mounting stud is provided with a thread, the interior of the mounting stud is axially provided with a first axial hole, one end of the first axial hole passes through an end face of the mounting stud, the other end of the first axial hole is provided with a second axial hole, and the other end face of the mounting stud is passed through the second axial hole, the aperture of the first axial hole is larger than the aperture of the second axial hole, the rear end cover is connected to one end of the mounting stud and closes one end of the first axial hole, the telescopic spring is installed in the first axial hole, one end of the telescopic spring abuts against the rear end cover, the telescopic head includes a convex portion of a spherical structure and a limiting portion of a cylindrical structure, the limiting portion is movably matched with the first axial hole, the other end of the telescopic spring abuts against the limiting portion, the limiting portion is connected to the protruding portion at one end facing away from the telescopic spring, and the protruding portion can extend out of the mounting stud through the second axial hole; the positioning hole is a spherical concave hole adapted to the protruding portion.

[0017] In the present invention, the rotating rocker arm is provided with a guiding inclined surface for guiding the protruding portion to telescopically move when cooperating with the protruding portion.

[0018] The beneficial effects of the present invention are as follows: by configuring multiple brakes on the traction machine, and by connecting the action switches of the multiple brakes to the synchronous frame, when the traction machine needs to be braked, the synchronous motor rotates, driving the rope wheel to rotate, the pull rope is wound around the rope wheel, pulling the extension rod to slide along the limit sleeve, the reset spring is compressed, the first connecting ring and the second connecting ring drive the action switches of all brakes to act synchronously, clamping the corresponding brake discs, stopping the rotation of the traction main machine and the traction wheel, thereby ensuring the synchronization and reliability of the braking of the traction machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the super-large load freight elevator of this embodiment;

[0020] Figure 2 Schematic diagram of the overall structure of the traction machine of this embodiment;

[0021] Figure 3 is a stereoscopic view of the brake of this embodiment in one viewing direction;

[0022] Figure 4 is a three-dimensional view of the brake of this embodiment in another viewing direction;

[0023] Figure 5This is a schematic diagram of the structure of the rear positioning member of this embodiment;

[0024] Figure 6 This is a schematic diagram of the connection of the synchronization frame of this embodiment;

[0025] Figure 7 It is a structural schematic diagram of the synchronous frame of this embodiment;

[0026] Figure 8 This is a schematic diagram of the structure of the elastic positioning member and the positioning hole in this embodiment when they cooperate with each other;

[0027] Fig. 9 This is a schematic diagram of the structure when the elastic positioning member of this embodiment is separated from the positioning hole;

[0028] Fig.10 This is a schematic diagram of the internal structure of the stud installation in this embodiment. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0030] like Figures 1 to 10 As shown, this embodiment discloses an extra-large load freight elevator, including a shaft, a plurality of car rails 1, a car frame 2, a car 3, a car top frame 4 and a traction machine 5. The plurality of car rails 1 are vertically installed in the shaft, the two sides of the car frame 2 are slidably matched with the car rails 1, the car 3 is installed in the car frame 2, the car top frame 4 is located above the shaft, the traction machine 5 is fixedly installed on the car top frame 4, and the traction machine 5 is connected to the car frame 2 through a traction rope. When the traction machine 5 is working, the car frame 2 is driven by the traction rope to move up and down under the guidance of the guide rail of the car 3, and the car frame 2 drives the car 3 to move up and down, so the safety and reliability of the operation of the extra-large load freight elevator are closely related to the performance of the traction machine 5, and it is necessary to configure a safe and reliable traction machine 5 for it.

[0031] The traction machine 5 includes a traction main machine 51, a rotating shaft bracket 52, a traction wheel 53, two brake discs 54, two mounting discs 55 and a plurality of brakes 56. The rotating shaft of the traction main machine 51 is supported by the rotating shaft bracket 52, and the rotating shaft of the traction main machine 51 can rotate relative to the rotating shaft bracket 52; the traction wheel 53 and the two brake discs 54 are both mounted on the outer wall of the rotating shaft of the traction main machine 51, the two brake discs 54 are respectively located on the outer sides of the two end surfaces of the traction wheel 53, the two mounting discs 55 are respectively located on the side of the two brake discs 54 facing away from the traction wheel 53, and the outer peripheries of the two mounting discs 55 are circumferentially fixed with a plurality of brakes 56, and the brakes 56 are adapted to the brake discs 54. When the traction machine 5 is running, the shaft of the traction main machine 51 rotates under the support of the shaft bracket 52, and the traction wheel 53 and the two brake discs 54 rotate along with the shaft of the traction main machine 51; when the traction machine 5 is stopped, all the brakes 56 are actuated at the same time to clamp the corresponding brake discs 54, so that the traction main machine 51 and the traction wheel 53 stop rotating.

[0032] The brake 56 includes a controller 561, a rear brake plate 562, a rear brake pad 563, a fixed plate 564, a front brake plate 565 and a front brake pad 567. The controller 561, the rear brake plate 562, the fixed plate 564 and the front brake plate 565 are fixedly connected in sequence. The fixed plate 564 is fixedly connected to the mounting plate 55. The rear brake pad 563 and the front brake pad 567 are respectively installed on the opposite sides of the rear brake plate 562 and the front brake plate 565. The rear brake pad 563 and the front brake pad 567 are spaced to form a braking section 568 capable of accommodating the brake disc 54. The outer periphery of the brake disc 54 enters the braking section 568. When the controller 561 controls the rear brake pad 563 and the front brake pad 567 to perform a braking action, the rear brake pad 563 and the front brake pad 567 move relative to the rear brake plate 562 and the front brake plate 565 respectively, clamp the brake disc 54, and cause the brake disc 54 to generate friction to slow down or stop. When the brake 56 is installed, it is necessary to accurately adjust the distance between the rear brake pad 563 and the front brake pad 567 so that the brake 56 has the expected braking effect when it is actuated. The distance between the rear brake pad 563 and the front brake pad 567 is determined according to the distance between the rear brake plate 562 and the front brake plate 565. Therefore, a rear positioning member 569 is provided on the rear brake plate 562 of the present embodiment. The rear positioning member 569 includes an adjusting plate surface 5691 installed in contact with the rear brake plate 562 and an extending plate surface 5692 abutting against the fixing plate 564. The extending plate surface 5692 is vertically arranged with respect to the adjusting plate surface 5691. One end of the extending plate surface 5692 protrudes from the end surface of the adjusting plate surface 5691 and extends toward the fixing plate 564. An adjustment hole 5693 is provided, and the rear positioning member 569 is fixedly connected to the rear brake plate 562 after the adjusting bolt passes through the adjustment hole 5693. The adjustment hole 5693 extends along the distance direction between the rear brake plate 562 and the fixing plate 564. Before installing the rear brake plate 562, the rear positioning member 569 is first fixed to the rear brake plate 562 according to the set requirements. The protruding length of the extension plate surface 5692 can be adjusted by the matching position of the adjustment hole 5693 and the adjusting bolt, so as to determine the spacing between the rear brake plate 562 and the fixing plate 564 after installation. When installing the rear brake plate 562, it is only necessary to abut the extension plate surface 5692 against the side of the fixing plate 564 facing the rear brake plate 562, so as to realize fast and accurate positioning, and the installation is convenient and reliable. Similarly, a front positioning member 566 is provided on the front brake plate 565. The structure of the front positioning member 566 is the same as that of the rear positioning member 569. The front positioning member 566 is used to determine the distance between the front brake plate 565 and the fixing plate 564 to achieve fast and accurate positioning of the front brake plate 565 during installation.In this embodiment, the distance between the rear brake plate 562 and the fixed plate 564 after installation and the distance between the front brake plate 565 and the fixed plate 564 after installation are determined by the joint action of the rear positioning member 569 and the front positioning member 566. When the wear amount of the rear brake pad 563, the front brake pad 567 and the brake disc 54 is large, which affects the braking performance of the freight elevator, the distance between the rear brake plate 562 and the fixed plate 564 and the distance between the front brake plate 565 and the fixed plate 564 can be adjusted by adjusting the positions of the rear positioning member 569 and the front positioning member 566, so that the distance between the rear brake pad 563 and the brake disc 54 and the distance between the front brake pad 567 and the brake disc 54 meet the preset requirements, so as to ensure that the traction machine 5 has a safe and reliable braking effect.

[0033] Furthermore, in order to ensure the braking performance of the traction machine 5 and monitor the wear degree of the rear brake pad 563, the controller 561 is provided with a displacement sensor 6, and the signal collection end of the displacement sensor 6 is connected to the rear brake pad 563. When the rear brake pad 563 is in braking action, the signal collection end of the displacement sensor 6 moves accordingly, and the displacement sensor 6 collects the displacement length L of the rear brake pad 563 in braking action; after the rear brake pad 563 is installed, the brake 56 is in a non-braking state, and the distance between the rear brake pad 563 and the brake disc 54 is S. By calculating ∆X=LS, the wear amount of the rear brake pad 563 can be obtained as ∆X, and the maximum wear amount of the rear brake pad 563 is set to X. max When ∆X ≥ X max When ∆X<X max , the controller 561 sends a normal signal to the freight elevator control system, and the freight elevator works normally. During the operation of the brake 56, the wear of the rear brake pad 563 is equivalent to the wear of the front brake pad 567. Therefore, it is only necessary to configure a displacement sensor 6 for the rear brake pad 563 to monitor the wear degree, and there is no need to configure a wear monitoring device for the front brake pad 567. In addition, in order to monitor the balance of the movement of the rear brake pad 563, two displacement sensors 6 are provided on the controller 561. The two displacement sensors 6 are separately connected to the two ends of the rear brake pad 563. When the displacement lengths collected by the two displacement sensors 6 are equal or have a small difference, the balance of the movement of the rear brake pad 563 is better, the rear brake pad 563 can fully fit with the brake disc 54, and the braking effect is better; when the displacement lengths collected by the two displacement sensors 6 have a large difference, the balance of the movement of the rear brake pad 563 is poor, the rear brake pad 563 cannot fully fit with the brake disc 54, and the braking effect is poor.

[0034] Furthermore, in order to make all brakes 56 act synchronously when the traction machine 5 brakes, the traction machine 5 also includes a synchronous frame 57, a limiting sliding sleeve 58, a reset spring 59, a pull rope 60, a rope pulley 61 and a synchronous motor 62. The synchronous frame 57 includes a first connecting ring 571, a second connecting ring 572, a connecting rod 573, an extension pull rod 574, a rotating rocker 575 and a rotating ring 576. The first connecting ring 571 and the second connecting ring 572 are arranged in parallel. The first connecting ring 571 is connected to the action switches of all brakes 56 on one of the mounting plates 55, and the second connecting ring 572 is connected to the action switches of all brakes 56 on the other mounting plate 55. The two ends of the connecting rod 573 are respectively connected to the first connecting ring 571 and the second connecting ring 572, so that when the synchronous frame 57 acts, all brakes 56 can be driven to act synchronously. One end of the extension rod 574 is connected to the end of the first connection ring 571, and the other end extends along the circumferential extension line of the first connection ring 571; one end of the rotating swing rod 575 is connected to the end of the first connection ring 571, and the other end extends along the radial direction of the first connection ring 571 to connect to the rotating ring 576, and the rotating ring 576 is sleeved on the outer wall of the rotating shaft of the traction main machine 51, and the rotating ring 576 can rotate relative to the rotating shaft of the traction main machine 51. The extension rod 574 enters the limiting sleeve 58 for engagement, and the return spring 59 is arranged in the limiting sleeve 58; one end of the return spring 59 is connected to the extension rod 574, and the other end is connected to the limiting sleeve 58; one end of the pull rope 60 is connected to the other end of the extension rod 574, and the other end is wound and connected to the rope wheel 61, and the rope wheel 61 is installed on the rotating shaft of the synchronous motor 62. When the synchronous motor 62 rotates, the rope wheel 61 is driven to rotate, the pull rope 60 is wound around the rope wheel 61, the extension rod 574 is pulled to slide along the limit sliding sleeve 58, the reset spring 59 is compressed, and the first connecting ring 571 and the second connecting ring 572 drive the action switches of all brakes 56 to act synchronously. When the synchronous motor 62 rotates in the reverse direction, the first connecting ring 571 and the second connecting ring 572 are automatically reset under the elastic force of the reset spring 59, thereby driving all brakes 56 to resume action synchronously.

[0035] Furthermore, an elastic positioning member 7 is provided on the side of the mounting plate 55 facing the rotating swing rod 575. The elastic positioning member 7 can be elastically telescopically moved on the side of the mounting plate 55 facing the rotating swing rod 575. The rotating swing rod 575 is provided with a positioning hole 5751 that can cooperate with the elastic positioning member 7. When the synchronous frame 57 is automatically reset under the elastic force of the reset spring 59, the elastic positioning member 7 enters the positioning hole 5751, so that the synchronous frame 57 is limited to this position, so as to avoid the synchronous frame 57 swinging due to the working vibration of the traction machine 5 and other factors, resulting in the problem of malfunction of the brake 56. When the synchronous frame 57 is pulled by the pull rope 60, the synchronous frame 57 can make the elastic positioning member 7 disengage from the positioning hole 5751, thereby releasing the position limitation of the synchronous frame 57. The cam 731 is provided with a first cam 732 and a second cam 733, respectively, which are used to lock the locking cam 73. The cam 732 is provided with a second cam 734 and a second cam 735. The cam 732 is provided with a second cam 736 and a second cam 737. The locking cam 732 is provided with a first cam 737 and a second cam 738. The cam 733 is provided with a second cam 739 and a second cam 740. The cam 74 is provided with a second cam 741 and a second cam 742. The other end of the telescopic spring 72 abuts against the limiting portion 712, and the end of the limiting portion 712 facing away from the telescopic spring 72 is connected to the protrusion 711, and the protrusion 711 can extend out of the mounting stud 73 through the second shaft hole 732; the positioning hole 5751 is a spherical concave hole adapted to the protrusion 711; the rotating swing rod 575 is provided with a guide inclined surface 5752 for guiding the protrusion 711 to move telescopically when cooperating with the protrusion 711, so that when the rotating swing rod 575 is reset, the protrusion 711 is gradually retracted into the second shaft hole 732 through the guide inclined surface 5752, preventing the protrusion 711 from extending and getting stuck with the side of the rotating swing rod 575, affecting the reset of the rotating swing rod 575; the provision of the guide inclined surface 5752 can ensure that the rotating swing rod 575 is reset smoothly, and the protrusion 711 and the positioning hole 5751 cooperate to produce a limiting effect.

[0036] As a preferred embodiment, the protrusion 711 is formed by horizontally cutting a plane on a sphere, and the distance between the vertex of the protrusion 711 and the plane is between 4 / 7 and 3 / 4 of the radius of the sphere; the protrusion 711 obtained in this way can meet the working requirements of the synchronous frame 57, and can not only perform a reset and locking effect on the synchronous frame 57, but also can be separated from the positioning hole 5751 under the action of external force, thereby ensuring the normal operation of the synchronous frame 57.

[0037] As a preferred embodiment, the brake 56 adopts a caliper brake 56 structure. The brake disc 54 adopts a carbon ceramic brake disc 54, which is a brake disc 54 made of carbon fiber reinforced silicon carbide-based composite material, and has the advantages of low density, high temperature resistance, high and stable friction performance, etc., so as to ensure that the super-large load freight elevator has good braking performance.

[0038] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means belongs to the protection scope of the present invention.

Claims

1. An extra-large load freight elevator, comprising a shaft, a plurality of car rails (1), a car frame (2), a car (3), a car top frame (4) and a traction machine (5), wherein the plurality of car rails (1) are vertically installed in the shaft, the two sides of the car frame (2) are slidably matched with the car rails (1), the car (3) is installed in the car frame (2), the car top frame (4) is located above the shaft, the traction machine (5) is fixedly installed on the car top frame (4), and the traction machine (5) and the car frame (2) are connected by a traction rope; characterized in that: The traction machine (5) comprises a traction main machine (51), a rotating shaft bracket (52), a traction wheel (53), two brake discs (54), two mounting discs (55) and a plurality of brakes (56); the rotating shaft of the traction main machine (51) is supported by the rotating shaft bracket (52), and the rotating shaft of the traction main machine (51) can rotate relative to the rotating shaft bracket (52); the traction wheel (53) and the two brake discs (54) are both mounted on the outer wall of the rotating shaft of the traction main machine (51); the two brake discs (54) are respectively located on the outer sides of the two end surfaces of the traction wheel (53); the two mounting discs (55) are respectively located on the side of the two brake discs (54) facing away from the traction wheel (53); and a plurality of brakes (56) are circumferentially fixed to the outer circumference of the two mounting discs (55); the brakes (56) are adapted to the brake discs (54); The traction machine (5) comprises a synchronous frame (57), a limiting sleeve (58), a return spring (59), a pull rope (60), a rope pulley (61) and a synchronous motor (62); the synchronous frame (57) comprises a first connecting ring (571), a second connecting ring (572), a connecting rod (573), an extension rod (574), a rotating swing rod (575) and a rotating ring (576); the first connecting ring (571) and the second connecting ring (572) are arranged in parallel; the first connecting ring (571) is connected to the action switches of all brakes (56) on one of the mounting plates (55); the second connecting ring (572) is connected to the action switches of all brakes (56) on the other mounting plate (55); two ends of the connecting rod (573) are respectively connected to the first connecting ring (571) and the second connecting ring (572); one end of the extension rod (574) is connected to the first connecting ring (571); and one end of the extension rod (574) is connected to the first connecting ring (571). The first connecting ring (571) is connected to the end of the first connecting ring (571), and the other end extends along the circumferential extension line of the first connecting ring (571); one end of the rotating swing rod (575) is connected to the end of the first connecting ring (571), and the other end extends along the radial direction of the first connecting ring (571) to connect to the rotating ring (576), the rotating ring (576) is sleeved on the outer wall of the rotating shaft of the traction main machine (51), and the rotating ring (576) can rotate relative to the rotating shaft of the traction main machine (51); the extension rod (574) enters into the limiting sliding sleeve (58) for engagement, and the return spring (59) is arranged in the limiting sliding sleeve (58); one end of the return spring (59) is connected to the extension rod (574), and the other end is connected to the limiting sliding sleeve (58); one end of the pull rope (60) is connected to the other end of the extension rod (574), and the other end is wound and connected to the rope wheel (61), and the rope wheel (61) is installed on the rotating shaft of the synchronous motor (62); The brake (56) comprises a controller (561), a rear brake plate (562), a rear brake pad (563), a fixed plate (564), a front brake plate (565) and a front brake pad (567); the controller (561), the rear brake plate (562), the fixed plate (564) and the front brake plate (565) are fixedly connected in sequence; the fixed plate (564) is fixedly connected to the mounting plate (55); the rear brake pad (563) and the front brake pad (567) are respectively mounted on opposite sides of the rear brake plate (562) and the front brake plate (565); the rear brake pad (563) and the front brake pad (567) are spaced to form a braking zone (568) capable of accommodating the brake disc (54); the outer periphery of the brake disc (54) enters the braking zone (568); The rear brake plate (562) is provided with a rear positioning member (569), and the rear positioning member (569) comprises an adjusting plate surface (5691) mounted in contact with the rear brake plate (562) and an extending plate surface (5692) abutting against the fixing plate (564), the extending plate surface (5692) being arranged perpendicular to the adjusting plate surface (5691), one end of the extending plate surface (5692) protruding from the end surface of the adjusting plate surface (5691) and extending toward the fixing plate (564), an adjusting hole (5693) being provided on the adjusting plate surface (5691), the rear positioning member (569) being fixedly connected to the rear brake plate (562) after an adjusting bolt passes through the adjusting hole (5693), and the adjusting hole (5693) extending along the distance direction between the rear brake plate (562) and the fixing plate (564).

2. The super-large load-carrying freight elevator according to claim 1, characterized in that: The front brake plate (565) is provided with a front positioning piece (566), the structure of the front positioning piece (566) is the same as the structure of the rear positioning piece (569), and the front positioning piece (566) is used to determine the distance between the front brake plate (565) and the fixing plate (564).

3. The super-large load-carrying freight elevator according to claim 2, characterized in that: The controller (561) is provided with a displacement sensor (6), and a signal collection end of the displacement sensor (6) is connected to the rear brake pad (563).

4. The super-large load-carrying freight elevator according to claim 3, characterized in that: Two displacement sensors (6) are provided, and the two displacement sensors (6) are separately connected to the two end portions of the rear brake pad (563).

5. The super-large load-carrying freight elevator according to claim 1, characterized in that: An elastic positioning member (7) is provided on the side of the mounting plate (55) facing the rotating swing rod (575); the elastic positioning member (7) is capable of elastically telescopically moving on the side facing the rotating swing rod (575); and a positioning hole (5751) capable of cooperating with the elastic positioning member (7) is provided on the rotating swing rod (575).

6. The super-large load-carrying freight elevator according to claim 5, characterized in that: The elastic positioning member (7) comprises a telescopic head (71), a telescopic spring (72), a mounting stud (73) and a rear end cover (74); the outer wall of the mounting stud (73) is provided with a thread; the interior of the mounting stud (73) is provided with a first axial hole (731) along the axial direction; one end of the first axial hole (731) passes through one end surface of the mounting stud (73); the other end of the first axial hole (731) is provided with a second axial hole (732), and the second axial hole (732) passes through the other end surface of the mounting stud (73); the aperture of the first axial hole (731) is larger than the aperture of the second axial hole (732); the rear end cover (74) is connected to one end of the mounting stud (73) and one end of the first axial hole (731) is connected to the mounting stud (73). The telescopic spring (72) is installed in the first axial hole (731), one end of the telescopic spring (72) is abutted against the rear end cover (74), the telescopic head (71) comprises a protruding portion (711) of a spherical structure and a limiting portion (712) of a cylindrical structure, the limiting portion (712) is movably matched with the first axial hole (731), the other end of the telescopic spring (72) is abutted against the limiting portion (712), one end of the limiting portion (712) facing away from the telescopic spring (72) is connected to the protruding portion (711), and the protruding portion (711) can extend out of the mounting stud (73) through the second axial hole (732); the positioning hole (5751) is a spherical concave hole adapted to the protruding portion (711).

7. The super-large load freight elevator according to claim 6, characterized in that: The rotating swing rod (575) is provided with a guiding inclined surface (5752) for guiding the protruding portion (711) to telescopically move when cooperating with the protruding portion (711).

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