A transport trolley for maintenance in a fan engine room

Abstract

The utility model discloses a kind of transport trolley for fan nacelle internal maintenance, it is related to wind power technology field.The utility model includes main track and the moving disc of being movably connected on main track, the outer side wall of moving disc is rotatably sleeved with collar, the bottom of moving disc is provided with hoisting assembly, and hoisting assembly includes the installation box of being fixedly connected in the bottom center of moving disc.The utility model is hoisted to the equipment of damage and replacement by two electric hoists respectively, and the rotation of two mounting plates and electric hoist is driven by the rotating shaft on rotating arm, the damaged equipment is replaced quickly, the problem that the existing damaged equipment is not convenient for quick replacement is solved, the equipment hoisted is collided with other equipment by first baffle and second baffle is avoided, and the force between the equipment hoisted and first baffle, second baffle is reduced by first buffer and second buffer, the problem that the existing anti-collision ability is poor is solved.

Description

Technical Field

[0001] This utility model belongs to the field of wind power technology, and in particular relates to a transport trolley for maintenance inside the wind turbine nacelle. Background Technology

[0002] The wind turbine nacelle, also known as the wind turbine nacelle, is a huge nacelle at the top of the wind turbine tower. It contains all the key components needed to convert wind energy into electrical energy and is the "brain and heart" of the wind turbine. When maintaining and repairing the gearbox, generator and other equipment inside the wind turbine nacelle, due to the large weight of the gearbox, generator and other equipment, a transport trolley is usually used to lift the gearbox, generator and other equipment, which facilitates the maintenance and repair of the equipment inside the wind turbine nacelle. The existing authorization announcement document CN220926079U discloses a wind turbine nacelle rail crane, including a rail beam, a rail moving trolley, a rotating shaft, a boom, and an electric hoist; the rail moving trolley can move on the rail beam, the electric hoist can move on the boom, one end of the rotating shaft is connected to the rail moving trolley, and the other end is rotatably connected to the boom, which can realize the movement of the electric hoist at multiple angles and positions; However, it still has the following drawbacks in practical use: 1. The rail crane mentioned above uses a rail-mounted trolley and an electric hoist to lift and move the equipment inside the wind turbine nacelle. However, during use, it can only lift damaged or new equipment at a time, which is not convenient for quickly replacing damaged equipment. The maintenance time is long and its practicality is low. 2. The rail crane mentioned above uses an electric hoist to lift equipment inside the wind turbine nacelle. However, during the movement of the electric hoist, the lifted equipment is prone to shaking and collision with other equipment, which can cause damage to the equipment. Its safety performance is poor and its practicality is low.

[0003] To address these issues, we provide a transport trolley for maintenance inside the wind turbine nacelle. Utility Model Content

[0004] The purpose of this utility model is to provide a transport trolley for maintenance inside a wind turbine nacelle. It uses two electric hoists to lift damaged and replacement equipment respectively, and the rotating shaft on the rotating arm drives the two mounting plates and the electric hoists to rotate, realizing the rapid replacement of damaged equipment and solving the problem of the inconvenience of quickly replacing damaged equipment in existing systems. At the same time, the first and second anti-collision plates prevent the lifted equipment from colliding with other equipment, and the first and second buffer plates reduce the force between the lifted equipment and the first and second anti-collision plates, solving the problem of poor anti-collision capability in existing systems.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a transport trolley for maintenance inside a wind turbine nacelle, comprising a main track and a movable disk movably connected to the main track. A collar is rotatably fitted on the outer wall of the movable disk. A lifting assembly is provided at the bottom of the movable disk, including a mounting box fixedly connected to the center of the bottom of the movable disk. A rotating arm is rotatably connected to the bottom of the mounting box, and a rotating shaft is fixedly connected to the center of the top of the rotating arm. The top of the rotating shaft extends to the inner side of the mounting box. Mounting plates are welded to both sides of the bottom of the rotating arm, and electric hoists are fixedly connected to the lower surfaces of the mounting plates. Anti-collision components are provided on both sides of the top of the collar, including a mounting frame fixedly connected to the top of the collar. A first anti-collision plate is movably connected to the end of the mounting frame away from the collar. A first buffer plate is movably connected to the lower side of one outer wall of the first anti-collision plate via a first buffer spring. A mounting frame is fixedly connected to the top of the mounting frame, and second anti-collision plates are movably connected to the front and rear ends of the mounting frame. A second buffer plate is movably connected to the lower side of the second anti-collision plate via a second buffer spring.

[0006] The present invention is further configured such that: a first mobile crane is movably connected to the main track, a secondary track is fixedly connected to the bottom of the first mobile crane, a second mobile crane is movably connected to the secondary track, and the top of the mobile plate is fixedly connected to the bottom of the second mobile crane.

[0007] A further feature of this invention is that reinforcing plates are welded to both outer walls of the collar, and reinforcing rods are welded to the lower surface of the reinforcing plates. The bottom ends of the reinforcing rods are fixedly connected to the top two sides of the rotating arm.

[0008] A further feature of this invention is that L-shaped frames are fixedly connected to the front and rear ends of the mounting box, and the longitudinal support arms of the L-shaped frames are fixedly connected to the bottom front and rear ends of the movable disk.

[0009] A further feature of this invention is that a first bevel gear is fixedly connected to the outer wall of the rotating shaft, the first bevel gear is located inside the mounting box, an electromagnetic brake is fixedly connected to the top of the inner side of the mounting box, and the top end of the rotating shaft is fixedly connected to the output shaft of the electromagnetic brake.

[0010] A further feature of this invention is that a first drive motor is fixedly connected to one side of the outer wall of the mounting box via a first motor frame, and the output shaft of the first drive motor extends into the interior of the mounting box and is fixedly connected to a second bevel gear, the second bevel gear meshing with one side of the first bevel gear.

[0011] A further feature of this invention is as follows: a circular groove is provided on the outer top of the movable disk, and a protruding post is movably connected inside the circular groove. The top end of the protruding post extends to the outer side of the circular groove and is fixedly connected to the front and rear ends of the bottom of the mounting frame. A second drive motor is fixedly connected to the inner wall of one side of the slide groove of the mounting frame via a second motor frame. A first threaded rod is fixedly connected to the output shaft of the second drive motor. The end of the first threaded rod away from the second drive motor is rotatably connected to the inner wall of the other side of the slide groove. A first slider is threadedly connected to the first threaded rod. A first connecting rod is welded to all four sides of the outer wall of one side of the first slider. The end of the first connecting rod away from the first slider extends to the outer side of the slide groove and is fixedly connected to the upper part of the outer wall of one side of the first anti-collision plate.

[0012] A further feature of this invention is that: multiple first movable rods are fixedly connected at equal intervals on the outer wall of the first buffer plate near the first anti-collision plate; the end of the first movable rod away from the first buffer plate passes through the first anti-collision plate and is fixedly connected to a first limiting plate; a first buffer spring is located outside the first movable rod; the two ends of the first buffer spring are respectively fixedly connected to the opposing surfaces of the first buffer plate and the first limiting plate; and a first rubber pad is adhered to the outer wall of the first buffer plate away from the first anti-collision plate.

[0013] A further feature of this invention is that a dual-axis motor is fixedly connected to the inner center of the mounting frame via a third motor frame. The output shafts of the dual-axis motors are all fixedly connected to second threaded rods. The ends of the second threaded rods away from the dual-axis motors are rotatably connected to the inner front and rear end faces of the mounting frame. A second slider is threaded onto the second threaded rod. Second connecting rods are welded around the end faces of the second sliders away from the dual-axis motors. The ends of the second connecting rods away from the second sliders extend to the outer front and rear ends of the mounting frame and are fixedly connected to the second anti-collision plates.

[0014] A further feature of this invention is that: multiple second movable rods are fixedly connected at equal intervals on the end face of the second buffer plate near the second anti-collision plate; one end of the second movable rod away from the second buffer plate passes through the second anti-collision plate and is fixedly connected to a second limiting plate; a second buffer spring is located outside the second movable rod; the two ends of the second buffer spring are respectively fixedly connected to the opposing surfaces of the second buffer plate and the second limiting plate; and a second rubber pad is adhered to the end face of the second buffer plate away from the second anti-collision plate.

[0015] This utility model has the following beneficial effects: 1. This utility model, by setting up a hoisting assembly, activates one of the electric hoists to hoist the replacement equipment. The replacement equipment is then moved to a designated position by a first and a second moving trolley. Next, the first drive motor on the mounting box is activated. The first drive motor drives the rotating shaft and rotating arm to rotate through the first and second bevel gears, causing the idle electric hoist to rotate above the damaged equipment and hoist it. Finally, the first drive motor is activated again to swap the damaged equipment with the replacement equipment, achieving rapid replacement of the damaged equipment and facilitating the inspection and maintenance of equipment in the wind turbine nacelle.

[0016] 2. This utility model, by setting up anti-collision components, activates the second drive motor and dual-axis motor within the mounting frame and mounting bracket, causing the first anti-collision plate to move to one side of the suspended equipment, and causing the second anti-collision plate to move to the front and rear ends of the suspended equipment respectively. When the suspended equipment sways, it contacts the first or second anti-collision plate through the first and second buffer plates. The first and second buffer springs on the first and second buffer plates reduce the force between the suspended equipment and the first or second anti-collision plate, thereby preventing the suspended equipment from colliding with other equipment, facilitating the hoisting of equipment in the wind turbine nacelle, and making it easier to inspect and maintain the equipment in the wind turbine nacelle. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a structural disassembly diagram of the mobile disk of this utility model.

[0020] Figure 3 This is a structural schematic diagram of the hoisting assembly of this utility model.

[0021] Figure 4 This is a structural disassembly diagram of the mounting box of this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of the rotating arm of this utility model.

[0023] Figure 6 This is a schematic diagram of the anti-collision component of this utility model.

[0024] Figure 7 This is a structural disassembly diagram of the mounting bracket of this utility model.

[0025] Figure 8 This is a structural disassembly diagram of the first anti-collision plate of this utility model.

[0026] Figure 9 This is a structural disassembly diagram of the mounting frame and the second anti-collision plate of this utility model.

[0027] The attached diagram lists the components represented by each number as follows: 1-Main track, 101-First moving trolley, 102-Secondary track, 103-Second moving trolley, 2-Moving plate, 201-Lasso, 202-Reinforcing plate, 203-Reinforcing rod, 204-Circular groove, 3-Lifting assembly, 301-Mounting box, 301a-L-shaped frame, 302-Rotating arm, 302a-Rotating shaft, 302b-First bevel gear, 302c-Electromagnetic brake, 303-First drive motor, 303a-First motor frame, 303b-Second bevel gear, 304-Mounting plate, 305-Electric hoist, 4-Anti-collision assembly, 401-Mounting frame, 401a-Protruding column, 401b-Second motor frame, 401c-Second Drive motor, 401d-first threaded rod, 402-first anti-collision plate, 402a-first slider, 402b-first connecting rod, 403-first buffer plate, 403a-first movable rod, 403b-first limiting plate, 403c-first buffer spring, 403d-first rubber pad, 404-mounting frame, 404a-third motor frame, 404b-dual-axis motor, 404c-second threaded rod, 405-second anti-collision plate, 405a-second slider, 405c-second connecting rod, 406-second buffer plate, 406a-second movable rod, 406b-second limiting plate, 406c-second buffer spring, 406d-second rubber pad. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] Example 1 Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, this is the first embodiment of the present invention. This embodiment provides a transport trolley for maintenance inside a wind turbine nacelle, including a main track 1 and a movable disk 2 movably connected to the main track 1. A collar 201 is rotatably sleeved on the outer wall of the movable disk 2. A hoisting assembly 3 is provided at the bottom of the movable disk 2. The hoisting assembly 3 includes a mounting box 301, a rotating arm 302, a mounting plate 304, and an electric hoist 305. The damaged and replacement equipment is hoisted by two electric hoists 305 respectively, and the two mounting plates 304 and the electric hoist 305 are rotated by the rotating shaft 302a on the rotating arm 302, which realizes the rapid replacement of damaged equipment and solves the problem of the existing inconvenience in quickly replacing damaged equipment.

[0030] Specifically, the mounting box 301 is fixedly connected to the bottom center of the mobile disk 2. A rotating arm 302 is rotatably connected to the bottom of the mounting box 301. A rotating shaft 302a is fixedly connected to the top center of the rotating arm 302. The top end of the rotating shaft 302a extends to the inside of the mounting box 301. Mounting plates 304 are welded to both sides of the bottom of the rotating arm 302. Electric hoists 305 are fixedly connected to the lower surface of the mounting plates 304. The mounting box 301 is used to mount the rotating arm 302. The rotating arm 302 is used to drive the two mounting plates 304 and the electric hoist 305 to rotate, so that it can move the damaged or replaced equipment to the designated position. The rotating shaft 302a is used to rotatably mount the rotating arm 302 on the mounting box 301 and drive the rotating arm 302 to rotate. The mounting plates 304 are used to mount the electric hoist 305. The electric hoist 305 is used to hoist the equipment in the wind turbine nacelle.

[0031] Furthermore, a first mobile crane 101 is movably connected to the main track 1, a secondary track 102 is fixedly connected to the bottom of the first mobile crane 101, a second mobile crane 103 is movably connected to the secondary track 102, and the top of the mobile disk 2 is fixedly connected to the bottom of the second mobile crane 103. Reinforcing plates 202 are welded to both outer walls of the collar 201. A reinforcing rod 203 is welded to the lower surface of the reinforcing plate 202. The bottom ends of the reinforcing rod 203 are fixedly connected to the top two sides of the rotating arm 302. L-shaped frames 301a are fixedly connected to the front and rear ends of the mounting box 301, and the longitudinal support arms of the L-shaped frames 301a are fixedly connected to the bottom front and rear ends of the movable disk 2 respectively. A first bevel gear 302b is fixedly connected to the outer wall of the rotating shaft 302a. The first bevel gear 302b is located inside the mounting box 301. An electromagnetic brake 302c is fixedly connected to the top of the inner side of the mounting box 301. The top of the rotating shaft 302a is fixedly connected to the output shaft of the electromagnetic brake 302c. A first drive motor 303 is fixedly connected to one side of the outer wall of the mounting box 301 via a first motor frame 303a. The output shaft of the first drive motor 303 extends into the interior of the mounting box 301 and is fixedly connected to a second bevel gear 303b. The second bevel gear 303b meshes with one side of the first bevel gear 302b.

[0032] The operation process of this embodiment is as follows: one of the electric hoists 305 is started, and the replacement equipment is hoisted by the electric hoist 305. The replacement equipment is moved to the designated position by the first moving crane 101 and the second moving crane 103. Then, the first drive motor 303 on the mounting box 301 is started. The first drive motor 303 drives the rotating shaft 302a and the rotating arm 302 to rotate through the first bevel gear 302b and the second bevel gear 303b, so that the idle electric hoist 305 rotates to the top of the damaged equipment and hoists the damaged equipment by the electric hoist 305. Finally, the first drive motor 303 is started again, so that the damaged equipment and the replacement equipment are swapped, realizing the rapid replacement of the damaged equipment.

[0033] Example 2 Please see Figure 1 , Figure 2 , Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, this is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs from the previous embodiment in that: anti-collision components 4 are provided on both sides of the top of the collar 201. The anti-collision components 4 include a mounting frame 401, a first anti-collision plate 402, a first buffer plate 403, a mounting frame 404, a second anti-collision plate 405, and a second buffer plate 406. The first anti-collision plate 402 and the second anti-collision plate 405 prevent the suspended equipment from colliding with other equipment, and the first buffer plate 403 and the second buffer plate 406 reduce the force between the suspended equipment and the first anti-collision plate 402 and the second anti-collision plate 405, thus solving the problem of poor anti-collision capability in the existing system.

[0034] Specifically, the mounting bracket 401 is fixedly connected to the top of the collar 201. A first anti-collision plate 402 is movably connected to the end of the mounting bracket 401 away from the collar 201. A first buffer plate 403 is movably connected to the lower side of one outer wall of the first anti-collision plate 402 via a first buffer spring 403c. A mounting frame 404 is fixedly connected to the top of the mounting bracket 401. Second anti-collision plates 405 are movably connected to both the front and rear ends of the mounting frame 404. Second buffer plates 405 are movably connected to the lower sides of each second anti-collision plate 405 via a second buffer spring 406c. The punch plate 406 and mounting bracket 401 are used to install the first anti-collision plate 402 and other structures. The first anti-collision plate 402 and the second anti-collision plate 405 are used to prevent the hoisted equipment from colliding with other equipment. The first buffer plate 403, the first buffer spring 403c, the second buffer plate 406, and the second buffer spring 406c are used to reduce the interaction force between the hoisted equipment and the first anti-collision plate 402 and the second anti-collision plate 405. The mounting frame 404 is used to install the second anti-collision plate 405.

[0035] Furthermore, a circular groove 204 is provided on the outer side of the top of the movable disk 2, and a protrusion 401a is movably connected inside the circular groove 204. The top end of the protrusion 401a extends to the outer side of the circular groove 204 and is fixedly connected to the bottom front and rear ends of the mounting bracket 401. A second drive motor 401c is fixedly connected to the inner wall of one side of the slide groove of the mounting bracket 401 via a second motor bracket 401b. The output shaft of the second drive motor 401c is fixedly connected to a first threaded rod 401d. One end of the first threaded rod 401d away from the second drive motor 401c is rotatably connected to the inner wall of the other side of the slide groove. A first slider 402a is threadedly connected to the first threaded rod 401d. A first connecting rod 402b is welded to all four sides of the outer wall of one side of the first slider 402a. One end of the first connecting rod 402b away from the first slider 402a extends to the outside of the slide groove and is fixedly connected to the upper part of the outer wall of one side of the first anti-collision plate 402. Multiple first movable rods 403a are fixedly connected at equal intervals on the outer wall of the first buffer plate 403 near the first anti-collision plate 402. The end of the first movable rod 403a away from the first buffer plate 403 passes through the first anti-collision plate 402 and is fixedly connected to the first limiting plate 403b. The first buffer spring 403c is located outside the first movable rod 403a. The two ends of the first buffer spring 403c are fixedly connected to the facing surfaces of the first buffer plate 403 and the first limiting plate 403b, respectively. A first rubber pad 403d is adhered to the end face of the first buffer plate 403 away from the first anti-collision plate 402. A dual-axis motor 404b is fixedly connected to the internal center of the mounting frame 404 via a third motor frame 404a. The output shafts of the dual-axis motor 404b are all fixedly connected to second threaded rods 404c. The ends of the second threaded rods 404c away from the dual-axis motor 404b are rotatably connected to the inner front and rear end faces of the mounting frame 404. A second slider 405a is threaded onto the second threaded rod 404c. Second connecting rods 405c are welded to the four sides of the end face of the second slider 405a away from the dual-axis motor 404b. The ends of the second connecting rods 405c away from the second slider 405a extend to the outer front and rear ends of the mounting frame 404 and are fixedly connected to the second anti-collision plate 405.

[0036] Multiple second movable rods 406a are fixedly connected at equal intervals on the end face of the second buffer plate 406 near the second anti-collision plate 405. The end of the second movable rod 406a away from the second buffer plate 406 passes through the second anti-collision plate 405 and is fixedly connected to the second limiting plate 406b. The second buffer spring 406c is located outside the second movable rod 406a. The two ends of the second buffer spring 406c are fixedly connected to the facing surfaces of the second buffer plate 406 and the second limiting plate 406b, respectively. A second rubber pad 406d is adhered to the end face of the second buffer plate 406 away from the second anti-collision plate 405.

[0037] The rest of the structure is the same as in Example 1.

[0038] The operation process of this embodiment is as follows: the second drive motor 401c and the dual-axis motor 404b in the mounting bracket 401 and mounting frame 404 are started, so that the first anti-collision plate 402 moves to one side of the suspended equipment, and the second anti-collision plate 405 moves to the front and rear ends of the suspended equipment respectively. When the suspended equipment shakes, it contacts the first anti-collision plate 402 or the second anti-collision plate 405 through the first buffer plate 403 and the second buffer plate 406. The first buffer spring 403c and the second buffer spring 406c on the first buffer plate 403 and the second buffer plate 406 reduce the force between the suspended equipment and the first anti-collision plate 402 or the second anti-collision plate 405, thereby avoiding the suspended equipment from colliding with other equipment.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, enabling those skilled in the art to better understand and utilize it.

Claims

1. A transport trolley for maintenance inside a wind turbine nacelle, comprising a main track (1) and a movable disk (2) movably connected to the main track (1), characterized in that: A collar (201) is rotatably fitted on the outer wall of the movable disk (2), and a hoisting assembly (3) is provided at the bottom of the movable disk (2). The hoisting assembly (3) includes a mounting box (301) fixedly connected to the center of the bottom of the movable disk (2), and a rotating arm (302) is rotatably connected to the bottom of the mounting box (301). A rotating shaft (302a) is fixedly connected to the center of the top of the rotating arm (302), and the top end of the rotating shaft (302a) extends to the inner side of the mounting box (301). Mounting plates (304) are welded to both sides of the bottom of the rotating arm (302), and electric hoists (305) are fixedly connected to the lower surface of the mounting plates (304). The top of the collar (201) is... Both sides are provided with anti-collision components (4), and the anti-collision components (4) include a mounting bracket (401) fixedly connected to the top of the collar (201). The end of the mounting bracket (401) away from the collar (201) is movably connected to a first anti-collision plate (402), and the lower side of the outer wall of the first anti-collision plate (402) is movably connected to a first buffer plate (403) via a first buffer spring (403c). The top of the mounting bracket (401) is fixedly connected to a mounting frame (404), and the front and rear ends of the mounting frame (404) are movably connected to a second anti-collision plate (405). The lower side of the second anti-collision plate (405) is movably connected to a second buffer plate (406) via a second buffer spring (406c).

2. The transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, The main track (1) is movably connected to a first mobile crane (101), and the bottom of the first mobile crane (101) is fixedly connected to a secondary track (102). The secondary track (102) is movably connected to a second mobile crane (103), and the top of the mobile disk (2) is fixedly connected to the bottom of the second mobile crane (103).

3. The transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, The outer walls of both sides of the collar (201) are welded with reinforcing plates (202), and the lower surface of the reinforcing plates (202) is welded with reinforcing rods (203). The bottom ends of the reinforcing rods (203) are fixedly connected to the top two sides of the rotating arm (302).

4. A transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, The front and rear ends of the mounting box (301) are fixedly connected to L-shaped frames (301a), and the longitudinal arms of the L-shaped frames (301a) are fixedly connected to the bottom front and rear ends of the movable disk (2).

5. A transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, A first bevel gear (302b) is fixedly connected to the outer wall of the rotating shaft (302a), and the first bevel gear (302b) is located inside the mounting box (301). An electromagnetic brake (302c) is fixedly connected to the top of the inner side of the mounting box (301), and the top of the rotating shaft (302a) is fixedly connected to the output shaft of the electromagnetic brake (302c).

6. A transport trolley for maintenance inside a wind turbine nacelle according to claim 5, characterized in that, A first drive motor (303) is fixedly connected to one side of the outer wall of the mounting box (301) via a first motor frame (303a), and the output shaft of the first drive motor (303) extends into the interior of the mounting box (301) and is fixedly connected to a second bevel gear (303b), which meshes with one side of the first bevel gear (302b).

7. A transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, The movable disk (2) has a circular groove (204) on its top outer side, and a protrusion (401a) is movably connected inside the circular groove (204). The top of the protrusion (401a) extends to the outside of the circular groove (204) and is fixedly connected to the bottom front and rear ends of the mounting bracket (401). A second drive motor (401c) is fixedly connected to the inner wall of the sliding groove side of the mounting bracket (401) through a second motor bracket (401b). The output shaft of the second drive motor (401c) is fixedly connected to a first threaded rod. (401d), and the end of the first threaded rod (401d) away from the second drive motor (401c) is rotatably connected to the inner wall of the other side of the slide. The first threaded rod (401d) is threadedly connected to the first slider (402a), and the outer wall of one side of the first slider (402a) is welded with the first connecting rod (402b). The end of the first connecting rod (402b) away from the first slider (402a) extends to the outside of the slide and is fixedly connected to the upper side of the outer wall of the first anti-collision plate (402).

8. A transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, Multiple first movable rods (403a) are fixedly connected at equal intervals on the outer wall of the first buffer plate (403) near the first anti-collision plate (402). The end of the first movable rod (403a) away from the first buffer plate (403) passes through the first anti-collision plate (402) and is fixedly connected to the first limiting plate (403b). The first buffer spring (403c) is located outside the first movable rod (403a), and the two ends of the first buffer spring (403c) are fixedly connected to the facing surfaces of the first buffer plate (403) and the first limiting plate (403b) respectively. A first rubber pad (403d) is adhered to the outer wall of the first buffer plate (403) away from the first anti-collision plate (402).

9. A transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, The internal center of the mounting frame (404) is fixedly connected to a dual-axis motor (404b) via a third motor frame (404a), and the output shafts of the dual-axis motor (404b) are all fixedly connected to a second threaded rod (404c). The end of the second threaded rod (404c) away from the dual-axis motor (404b) is rotatably connected to the inner front and rear end faces of the mounting frame (404), and a second slider (405a) is threaded onto the second threaded rod (404c). The end face of the second slider (405a) away from the dual-axis motor (404b) is welded with a second connecting rod (405c) around its perimeter, and the end of the second connecting rod (405c) away from the second slider (405a) extends to the outer front and rear ends of the mounting frame (404) and is fixedly connected to the second anti-collision plate (405).

10. A transport trolley for maintenance inside a wind turbine nacelle according to claim 1, characterized in that, Multiple second movable rods (406a) are fixedly connected at equal intervals on the end face of the second buffer plate (406) near the second anti-collision plate (405). The end of the second movable rod (406a) away from the second buffer plate (406) passes through the second anti-collision plate (405) and is fixedly connected to the second limiting plate (406b). The second buffer spring (406c) is located outside the second movable rod (406a), and the two ends of the second buffer spring (406c) are fixedly connected to the opposing surfaces of the second buffer plate (406) and the second limiting plate (406b), respectively. A second rubber pad (406d) is adhered to the end face of the second buffer plate (406) away from the second anti-collision plate (405).

Images