Backpack frame for lifting device, lifting device and wind driven generator

Abstract

The utility model relates to the technical field of wind power, and provides a backpack frame for a lifting device, the lifting device and a wind driven generator, the backpack frame comprises a supporting assembly, a driving assembly and a guide wheel assembly, and the driving assembly and the guide wheel assembly are arranged at the corresponding positions of the supporting assembly respectively. The driving assembly and the guide wheel assembly are used for ascending and descending along the rack crawling ladder, and the supporting assembly is used for installing a lift car. The knapsack frame provided by the utility model is used for overcoming the defect that the interface of the lift car needs to be synchronously updated when the lift car is replaced in the prior art, and the driving assembly and the guide wheel assembly are arranged on the supporting assembly, so that when the knapsack frame is used for installing the lift car, the lift car does not need to be specially provided with the interface for installing the driving assembly and the guide wheel assembly; and therefore, the interface of the replaced lift car does not need to be reinforced, and the cost of the lifting device in the aspects of production, maintenance and the like can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind power technology, and in particular to a backpack frame for a lifting device, a lifting device, and a wind turbine. Background Technology

[0002] In the wind power sector, rack and pinion jacks are a type of vertical transport equipment commonly used inside wind turbine towers. In existing rack and pinion jacks, the drive components and guide wheel components are generally directly mounted on the car, so it is necessary to strengthen the interface of the car (where the drive components and guide wheel components are installed).

[0003] Wind turbine towers contain platforms for different purposes, and the locations of these platforms are mostly different. In order to adapt to these platforms, the dimensions of the running passage and the direction of the door opening of the hoist are not uniform. This means that different car structures need to be adopted and replaced for different platforms. However, replacing the car requires constant synchronous updating of the car's interface, which puts great pressure on the production and use of rack and pinion hoists. Utility Model Content

[0004] The first aspect of this utility model provides a backpack frame for a lifting device, which solves the defect in the prior art that the interface of the car needs to be updated simultaneously when the car is replaced. By setting the drive component and the guide wheel component on the support component, when the backpack frame is used to install the car, the car does not need to be specially set with an interface for installing the drive component and the guide wheel component. Therefore, it is not necessary to strengthen the interface of the replaced car, which can effectively reduce the cost of the lifting device in terms of production and maintenance.

[0005] The second aspect of this utility model provides a lifting device.

[0006] The third aspect of this utility model provides a wind turbine generator.

[0007] The backpack frame for the lifting device provided by this utility model includes a support assembly, a drive assembly, and a guide wheel assembly. The drive assembly and the guide wheel assembly are respectively disposed at corresponding positions of the support assembly. The drive assembly and the guide wheel assembly are used to perform lifting and lowering movements along the rack and pinion ladder. The support assembly is used to install the car.

[0008] According to the backpack frame for lifting device provided by this utility model, the support assembly includes a first support component and a second support component, wherein the second support component is vertically disposed at the lower end of the first support component and extends in a direction away from the first support component;

[0009] The drive assembly and the guide wheel assembly are respectively located at corresponding positions of the first support component. The first support component and the second support component together form a mounting part, which is used to mount the car.

[0010] According to the backpack frame for lifting device provided by this utility model, the second support component includes a second support frame, a base plate and a buffer component. The second support frame is vertically disposed at the lower end of the first support component and extends in a direction away from the first support component.

[0011] The base plate is located above the second support frame and is used to form the mounting portion; the buffer is located between the base plate and the second support frame.

[0012] According to the backpack frame for lifting device provided by this utility model, the first support component and the second support component are detachably connected.

[0013] The backpack frame for the lifting device provided by this utility model also includes a lubrication component, which is disposed on the support component and located above the drive component. The lubrication component is used to lubricate the rack of the rack ladder.

[0014] According to the backpack frame for lifting devices provided by this utility model, the lubrication assembly includes:

[0015] A lubrication pump is provided on the support assembly, and the lubrication pump is used to pump lubricating oil.

[0016] An oil pipe is connected to the output end of the lubrication pump, and the oil pipe is used to transport lubricating oil;

[0017] A felt wheel is provided on the support assembly and located directly above the drive gear of the drive assembly; the felt wheel is connected to the output end of the oil pipe, and the felt wheel is used to lubricate the rack of the rack ladder.

[0018] According to the backpack frame for lifting device provided by this utility model, the walking surface of the felt wheel is provided with a plurality of oil outlet holes evenly spaced, and each oil outlet hole is connected to the output end of the oil pipe.

[0019] The backpack frame for the lifting device provided by this utility model also includes an oil collection assembly. The oil collection assembly includes an oil collection box and a scraper. The oil collection box is disposed on the support assembly, and the opening of the oil collection box is located directly below the drive gear of the drive assembly. The scraper is disposed at the opening of the oil collection box and is used to scrape the lubricating oil on the rack of the rack ladder into the oil collection box.

[0020] According to the backpack frame for lifting device provided by this utility model, the driving assembly includes a driving component, a driving motor and a centrifugal speed limiter. One end of the centrifugal speed limiter is connected to the driving motor and the other end is connected to the driving component. The driving component is used to perform lifting and lowering movements along the rack and pinion ladder.

[0021] The lifting device provided by this utility model includes a car and a backpack rack as described in any of the preceding claims. The car is disposed on the backpack rack, and the backpack rack is used for lifting and lowering along a rack and pinion ladder.

[0022] The wind turbine provided by this utility model includes a tower, a rack ladder, a limiting base, and the aforementioned lifting device. The rack ladder is located on the tower and extends along the height direction of the tower. The lifting device is used to perform lifting and lowering movements along the rack ladder.

[0023] The limiting base is located at the bottom of the tower and directly below the lifting device. When the lifting device is parked on the limiting base, the limiting base is used to restrict the radial movement of the lifting device.

[0024] In the backpack frame for a lifting device provided in this embodiment, by mounting the drive assembly and guide wheel assembly on the support assembly, when the backpack frame is used to install the car, the car does not need to have a specially designed interface for installing the drive assembly and guide wheel assembly. Thus, when dealing with different platforms, even if a car with a different structure is replaced, there is no need to reinforce the interface of the replaced car; the car can simply be installed on the support assembly. This configuration allows one backpack frame to match multiple cars with different structures, effectively reducing the production and maintenance costs of the lifting device while meeting the needs of different platforms, and also reducing the difficulty of car replacement. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is an axonometric view of the backpack frame provided in an embodiment of this utility model.

[0027] Figure 2 This is a partial structural schematic diagram of the second support component provided in an embodiment of the present invention.

[0028] Figure 3 yes Figure 2 Enlarged schematic diagram of a local structure.

[0029] Figure 4 This is a schematic diagram of the first support frame and the second support frame provided in the embodiment of this utility model.

[0030] Figure 5 This is an axial side view of the lubrication assembly provided in an embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the felt wheel provided in this embodiment of the utility model.

[0032] Figure 7 This is a schematic diagram of the oil collection component provided in an embodiment of the present invention.

[0033] Figure 8 This is a schematic diagram of the scraper provided in an embodiment of the present invention.

[0034] Figure 9 This is a schematic diagram of the guide wheel assembly provided in an embodiment of the present invention.

[0035] Figure 10 This is a structural schematic diagram of the lifting device provided in an embodiment of the present utility model.

[0036] Figure 11 This is a schematic diagram of the structure of the limiting base provided in this embodiment of the utility model.

[0037] Figure label:

[0038] 10: Backpack rack; 20: Car; 30: Rack and pinion ladder; 40: Limiting base; 41: Limiting boss; 50: Upper contour limiting structure; 60: Lower contour limiting structure;

[0039] 100: Support assembly; 110: First support component; 111: First support frame; 112: Upper drive plate; 113: Lower drive plate; 120: Second support component; 121: Second support frame; 122: Base plate; 123: Buffer component; 124: Weighing sensor; 125: Reinforcing plate; 126: Limiting sleeve; 130: Mounting part;

[0040] 200: Drive assembly; 210: Drive component; 211: Drive gear; 220: Drive motor; 230: Centrifugal speed limiter; 300: Guide wheel assembly; 310: Guide wheel support; 320: Fixed guide wheel assembly; 330: Floating guide wheel assembly; 400: Lubrication assembly; 410: Lubrication pump; 420: Oil pipe; 430: Felt wheel; 431: Oil outlet; 500: Oil collection assembly; 510: Oil collection box; 520: Scraper; 530: Connecting plate; 600: Eccentric wheel assembly. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0043] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0044] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0045] Figure 1 This is an axonometric view of the backpack frame provided in an embodiment of this utility model.

[0046] See Figure 1The first aspect of this utility model provides a backpack frame 10 for a lifting device. For ease of explanation, it is referred to as backpack frame 10. Backpack frame 10 includes a support component 100, a drive component 200, and a guide wheel component 300. The drive component 200 and the guide wheel component 300 are respectively disposed at corresponding positions on one side of the support component 100, and the other side of the support component 100 is used to install a car 20. The drive component 200 and the guide wheel component 300 are matched with a rack and pinion ladder 30 and are used to perform lifting and lowering movements along the rack and pinion ladder 30. This article takes the backpack frame 10 with two sets of drive components 200 and four sets of guide wheel components 300 as an example. For the specific configuration of the drive component 200 and the guide wheel component 300, please refer to the existing technology for adaptive design, which will not be repeated here.

[0047] See Figure 1 It is understood that in the backpack frame 10 provided in this embodiment of the present invention, by setting the drive assembly 200 and the guide wheel assembly 300 on the support assembly 100, when the backpack frame 10 is used to install the car 20, the car 20 does not need to be specially designed with an interface for installing the drive assembly 200 and the guide wheel assembly 300 due to the presence of the backpack frame 10. Thus, when facing different platforms, even if a car 20 with a different structure is replaced, there is no need to reinforce the interface of the replaced car 20; the car 20 can simply be installed on the support assembly 100. This arrangement allows one backpack frame 10 to match multiple cars 20s with different structures, effectively reducing the cost of production and maintenance of the lifting device while meeting the needs of different platforms, and also reducing the operational difficulty of replacing the car 20.

[0048] Continue reading Figure 1 In an optional embodiment of this utility model, the support assembly 100 includes a first support member 110 and a second support member 120. The second support member 120 is vertically disposed at the lower end of the first support member 110 and extends in a direction away from the first support member 110. At the same time, the first support member 110 also extends in a direction away from the second support member 120. In other words, the support assembly 100 has an "L" shaped structure. The drive assembly 200 and the guide wheel assembly 300 are respectively disposed at corresponding positions on the first support member 110. The first support member 110 and the second support member 120 together form a mounting portion 130, which is used to mount the car 20.

[0049] Specifically, when installing the car 20, the first support component 110 can be connected to the car 20 from the side of the car 20, thereby limiting and supporting the car 20 radially, and the second support component 120 can be connected to the car 20 from the bottom of the car 20, thereby supporting and limiting the car 20 axially.

[0050] See Figure 1 It is understood that the backpack frame 10 provided in this embodiment of the present invention has an "L"-shaped support component 100, which allows the entire support component 100 to form a stable layout in space. This structure can effectively distribute the weight of the car 20 and the torque in various directions, and provide a stable mounting base for the drive component 200 and the guide wheel component 300, thereby ensuring the stability of the entire backpack frame 10 during the lifting and lowering movement along the rack and pinion ladder 30.

[0051] Figure 2 This is a partial structural schematic diagram of the second support component provided in an embodiment of the present utility model; Figure 3 yes Figure 2 Enlarged schematic diagram of a local structure in the middle; Figure 4 This is a schematic diagram of the first support frame and the second support frame provided in the embodiment of this utility model.

[0052] See Figure 2 , Figure 3 and Figure 4 In an optional embodiment of the present invention, the second support component 120 includes a second support frame 121, a base plate 122, and a buffer component 123. The second support frame 121 is welded from several components such as longitudinal beams, transverse beams, and limiting support sleeves. In this embodiment of the present invention, the second support frame 121 can be set to various shapes according to actual conditions. In this embodiment, a rectangular frame is used as an example for illustration and explanation.

[0053] The base plate 122 is disposed above the second support frame 121 and is adapted to the shape of the second support frame 121. The base plate 122 is used to form the mounting part 130 to facilitate the installation of the car 20. In some optional embodiments of this utility model, the base plate 122 can also serve as the bottom of the car 20. The buffer 123 is disposed between the base plate 122 and the second support frame 121 and is used to absorb vibrations from the second support frame 121.

[0054] See Figures 1 to 4It is understandable that rack and pinion lifts, as vertical transportation equipment within wind power towers, currently have components such as the drive unit 210 (reducer) and guide wheel assembly 300 mounted on the car 20. During the lifting process of the rack and pinion lift, vibrations are generated by the meshing of the gears and racks, as well as the relative movement between the guide wheel assembly and the rack's structural frame. These vibrations are transmitted to the car 20, significantly affecting its passenger or cargo carrying capacity. In the backpack frame 10 provided in this embodiment, a buffer 123 is provided between the second support frame 121 and the base plate 122. This buffer 123 absorbs vibrations generated by the meshing of the gears and racks, as well as the relative movement between the guide wheel assembly and the rack's structural frame, effectively reducing the impact of these vibrations on the passenger or cargo carrying capacity of the car 20.

[0055] Continue reading Figure 3 In an optional embodiment of this utility model, the second support component 120 further includes four reinforcing plates 125 and four weighing sensors 124. The four reinforcing plates 125 and four weighing sensors 124 are respectively disposed at the four opposite corners of the base plate 122 and located between the base plate 122 and the second support frame 121. During assembly, fasteners pass through the base plate 122, the reinforcing plates 125, the buffer 123 and the weighing sensors 124 in sequence and are then fixed to the second support frame 121. The reinforcing plates 125 are used to connect the base plate 122 and the buffer 123. The weighing sensors 124 are used to measure the self-weight of the car 20 and the load of the car 20 to avoid overload. The specific arrangement of the reinforcing plates 125 and the weighing sensors 124 can be found in the prior art, and will not be described in detail here.

[0056] Continue reading Figure 4 In an optional embodiment of this utility model, the second support component 120 and the first support component 110 are detachably connected. There are various ways to detachably connect them, such as plugging, snapping, and fastener connection. It is understood that during transportation, the first support component 110 and the second support component 120 can be separated based on the detachable connection. This can effectively reduce the space occupied by the backpack frame 10, thereby reducing the difficulty of transportation.

[0057] It is also understandable that manufacturing errors are inevitable in the existing production process, such as welding deformation. These problems can cause issues with the perpendicularity between the first support component 110 and the second support component 120, resulting in the backpack frame 10 not fitting the car 20. In the backpack frame 10 provided by this utility model embodiment, since the first support component 110 and the second support component 120 are detachably connected during assembly, the perpendicularity between the first support component 110 and the second support component 120 can be adjusted during connection. This can improve the installation compatibility between the first support component 110 and the second support component 120 and the car 20, and at the same time reduce the difficulty of processing and manufacturing the backpack frame 10.

[0058] See Figure 1 and Figure 4 In an optional embodiment of this utility model, the first support component 110 includes a first support frame 111 and two drive plates. The first support frame 111 includes two vertical beams, which are arranged at intervals relative to each other. The two drive plates are arranged at intervals relative to each other between the two vertical beams. Each drive plate can be separately provided with a drive assembly 200 and two guide wheel assemblies 300. The vertical beams are used to form the aforementioned mounting part 130 to facilitate the installation of the car 20. For ease of distinction in the following text, the two drive plates are divided into an upper drive plate 112 and a lower drive plate 113 according to their vertical positions.

[0059] Continue reading Figure 4 In an optional embodiment of this utility model, the upper drive plate 112 and the lower drive plate 113 can be configured as a bent structure, with the protruding part facing away from the second support member 120. It is understood that this configuration is beneficial to the layout of the drive motor 220, and can make the overall structure of the drive device and the first support member 110 more compact, thereby improving space utilization.

[0060] Figure 5 This is an axial side view of the lubrication assembly provided in an embodiment of the present invention.

[0061] See Figure 1 and Figure 5 In an optional embodiment of this utility model, the backpack frame 10 further includes a lubrication component 400, which is disposed on the upper drive plate 112 and located directly above the drive gear 211 of the drive component 200. After the backpack frame 10 is assembled with the rack and pinion ladder 30, the lubrication component 400 can apply lubricating oil to the rack above the drive gear 211. When the drive gear 211 moves to the lubricated rack, the drive gear 211 will also adhere to the lubricating oil, thereby playing a role in lubricating the meshing surface.

[0062] It is understandable that the lubrication of the gears and racks in the existing wind turbines requires manual application, which is inefficient and poses significant safety hazards during the climbing and application process. The lubrication component 400 provided in this embodiment can automatically lubricate the rack and drive gear 211, solving the problem of low efficiency of manual application and reducing safety risks.

[0063] Continue reading Figure 5 In an optional embodiment of the present invention, the lubrication assembly 400 includes a lubrication pump 410, an oil pipe 420 and a felt wheel 430. The lubrication pump 410 is mounted on the first support member 110 via a mounting base and is located above the drive assembly 200. The lubrication pump 410 is fixed to the mounting base with fasteners. The lubrication pump 410 is used to store and pump lubricating oil.

[0064] Oil pipe 420 is connected to the output end of lubrication pump 410. Oil pipe 420 is used to transport lubricating oil pumped from lubrication pump 410. Oil pipe 420 can be a rigid pipe or a flexible pipe. Felt wheel 430 is fixed to the first support member 110 by mounting base and is located directly above the drive gear 211 of drive assembly 200. Felt wheel 430 can roll along rack. Felt wheel 430 is connected to the output end of oil pipe 420. When lubricating oil is received, felt wheel 430 can fully absorb lubricating oil and act as a coating medium to apply lubricating oil to rack.

[0065] See Figure 5 It is understood that in the backpack frame 10 provided in this embodiment of the present invention, the lubrication pump 410 supplies oil, the oil pipe 420 delivers oil, and the felt wheel 430 applies oil. The three can form a complete automated oil supply system, which can fully ensure the lubrication of the rack, thereby solving the problem of low efficiency of manual application and reducing safety risks.

[0066] Preferably, the felt wheel 430 is shaped like a gear to match the rack, so that the felt wheel 430 can mesh with the gear, thereby increasing the contact area between the two and ensuring the coating of the rack groove.

[0067] Figure 6 This is a schematic diagram of the structure of the felt wheel provided in this embodiment of the utility model.

[0068] See Figure 6 In an optional embodiment of this utility model, a plurality of oil outlet holes 431 are evenly spaced on the walking surface of the felt wheel 430, and each oil outlet hole 431 is connected to the output end of the oil pipe 420. It can be understood that by setting a plurality of oil outlet holes 431, the flowing lubricating oil flowing directly from the oil outlet holes 431 can increase the lubrication area, thereby improving the lubrication efficiency.

[0069] When the felt wheel 430 is gear-shaped, the oil outlet 431 can be set at the bottom of the gear tooth groove, so that the tooth groove of the rack can be fully lubricated and the lubricating oil can fully cover the meshing surface of the gear tooth groove.

[0070] Figure 7 This is a schematic diagram of the oil collection component provided in an embodiment of the present invention.

[0071] See Figure 1 and Figure 7 In an optional embodiment of this utility model, the backpack frame 10 further includes an oil collection assembly 500, which includes an oil collection box 510, a scraper 520, and a connecting plate 530. The oil collection box 510 is mounted on the lower drive plate 113 of the first support member 110 via the connecting plate 530, and the opening of the oil collection box 510 is located directly below the drive gear 211 of the drive assembly 200. Excess lubricating oil on the rack and gear can fall into the oil collection box 510 from the opening. Without affecting the collection of grease, the connecting plate 530 can cover part of the opening of the oil collection box 510 to prevent grease from splashing.

[0072] Figure 8 This is a schematic diagram of the scraper provided in an embodiment of the present invention.

[0073] See Figure 7 and Figure 8 The scraper 520 is located at the opening of the oil collection box 510 and on the side of the oil collection box 510 facing the rack. The scraper 520 is used to scrape excess lubricating oil on the rack ladder 30 into the oil collection box 510. Preferably, the scraper 520 is a "U"-shaped scraper 520. In other words, the scraper 520 is provided with a "U"-shaped groove that matches the rack. When the backpack frame 10 is combined with the rack ladder 30, the bottom wall of the groove will fit against the top of the rack tooth, and the two side walls of the groove will fit against the two sides of the rack respectively. When the oil collection component 500 moves with the backpack frame 10, the scraper 520 can scrape off the excess lubricating oil on the rack and collect it into the oil collection box 510.

[0074] It is understandable that due to the special operating environment in the wind power field, especially at sea, the wind turbine tower will sway significantly, causing the rack and pinion ladder 30 installed inside the wind turbine tower to sway as well. In the aforementioned embodiment, when the drive gear 211 travels to the rack lubricated by the lubrication component 400, the meshing of the drive gear 211 with the rack will squeeze out some lubricating oil. This squeezed-out lubricating oil will hang on the rack. When the rack and pinion ladder 30 sways with the tower, this suspended lubricating oil will be randomly thrown to any place inside the tower. Over time, this will lead to a deterioration of the environment inside the tower, and in severe cases, it will affect the operation of other equipment inside the tower. The oil collection component 500 provided in this embodiment of the present invention can actively collect excess lubricating oil on the rack, which can effectively solve the problem of grease dripping and contaminating the wind turbine tower, and improve the safety of the wind turbine tower.

[0075] Referring to 1, in an optional embodiment of the present invention, the drive assembly 200 includes a drive component 210, a drive motor 220, and a centrifugal speed limiter 230. The drive component 210 includes components such as a drive gear 211 and a reduction gearbox. One end of the centrifugal speed limiter 230 is connected to the drive motor 220, and the other end is connected to the drive component 210. The drive component 210 is used to perform lifting and lowering movements along the rack and pinion ladder 30. The drive component 210 and the drive motor 220 can be configured with reference to the prior art.

[0076] Understandably, in the existing technology, lifting devices generally use fall arrestors to ensure the safety of the lifting device. The fall arrestor has a gear inside that meshes with the rack. Under normal conditions, this gear moves up and down along the rack with the lifting device. When the drive gear 211 fails, this gear will jam on the rack, thereby preventing a fall.

[0077] However, as shown in the figure, the lifting device is generally equipped with two driving components 210, one above the other. The driving gears 211 in the two driving components 210 will also mesh with the rack respectively. When there is a fall arrestor, the three gears on the same straight line will mesh with the rack at the same time. Due to unavoidable installation and manufacturing errors, the three gears cannot be guaranteed to be absolutely collinear. Therefore, it will inevitably lead to poor meshing state between at least one gear and the rack (also known as over-positioning). This will affect the lifting movement of the driving component 210 or the fall arrestor's fall arrest operation.

[0078] In the drive assembly 200 provided in this embodiment of the utility model, by setting a centrifugal speed limiter 230, it can be ensured that the descent speed of the lifting device does not exceed the preset speed in case of an accident (the preset speed can be set in advance in the centrifugal speed limiter 230). This eliminates the need for a fall arrestor and eliminates the safety hazard of workers on site resetting and continuing to use the fall arrestor after a fall. It also solves the over-positioning problem of the three gears.

[0079] Figure 9 This is a schematic diagram of the guide wheel assembly provided in an embodiment of the present invention.

[0080] See Figure 1 and Figure 9 In an optional embodiment of this utility model, the guide wheel assembly 300 includes a guide wheel support 310, a fixed guide wheel assembly 320, and a floating guide wheel assembly 330, wherein the fixed guide wheel assembly 320 and the floating guide wheel assembly 330 are respectively fixed to the guide wheel support 310 by fasteners; in an optional embodiment of this utility model, such as Figure 1 As shown, the guide wheel assembly 300 is provided in four sets, and the four sets of guide wheel assemblies 300 are respectively mounted on two vertical beams on both sides of the upper drive plate 112 and the lower drive plate 113 by fasteners. In an optional embodiment of this utility model, it also includes an eccentric wheel assembly 600, which is disposed opposite to the drive component 210 on the upper drive plate 112 and the lower drive plate 113. The specific design of the guide wheel support 310, the fixed guide wheel assembly 320 and the floating guide wheel assembly 330 and the eccentric wheel assembly 600 can be referred to the prior art, and will not be described in detail here.

[0081] Figure 10 This is a structural schematic diagram of the lifting device provided in an embodiment of the present utility model.

[0082] See Figure 1 and Figure 10 A second aspect of this utility model provides a lifting device, which includes a car 20 and a backpack frame 10 as described in any of the preceding embodiments. The car 20 is disposed on the backpack frame 10, and the backpack frame 10 is used for lifting and lowering along a rack and pinion ladder 30. Figure 10 As shown, in an optional embodiment of this utility model, the backpack frame 10 can also be combined with the car 20. The first support component 110 of the backpack frame 10 can be part of the back panel of the car 20, and the second support component 120 of the backpack frame 10 can be part of the bottom of the car 20. When the car 20 is replaced, the backpack frame 10 can remain unchanged, and the backpack frame 10 can be used as the assembly base for the new car 20. It is understood that this arrangement is conducive to the miniaturization of the lifting device and the compactness of the overall structure.

[0083] Continue reading Figure 10In an optional embodiment of this utility model, the lifting device further includes an upper contour limiting structure 50 and a lower contour limiting structure 60. The upper contour limiting structure 50 and the lower contour limiting structure 60 are respectively fixed to the car 20 by fasteners. It can be understood that by setting the upper contour limiting structure 50 and the lower contour limiting structure 60, on the one hand, it is beneficial to the structural compactness of the lifting device, and on the other hand, it can protect the car 20 and improve the service life of the car 20.

[0084] Figure 11 This is a schematic diagram of the structure of the limiting base provided in this embodiment of the utility model.

[0085] A third aspect of this utility model provides a wind turbine generator, which includes a tower, a rack and pinion ladder 30, a limiting base 40, and a lifting device as described in the previous embodiment. The rack and pinion ladder 30 is disposed on the tower and extends along the height direction of the tower. The lifting device is used to perform lifting and lowering movements along the rack and pinion ladder 30. The limiting base 40 is disposed at the bottom of the tower and located directly below the lifting device. The limiting base 40 can serve as a docking platform for the lifting device. When the lifting device is parked on the limiting base 40, the limiting base 40 is used to restrict the radial movement of the lifting device.

[0086] Specifically, the limiting base 40 is a rectangular frame structure, welded from multiple horizontal and vertical beams. At each of the four opposite corners of the limiting base 40, a limiting boss 41 matching the lifting device is provided. When the lifting device is positioned on the limiting base 40, the limiting boss 41 can be inserted into the limiting sleeve 126 at the bottom of the lifting device (backpack frame 10). Based on the cooperation between the limiting boss 41 and the limiting sleeve 126, the limiting base 40 can restrict the movement of the lifting device along its own radial direction. In an optional embodiment of this invention, the limiting boss 41 can also limit the lifting device from the side, which can be adapted according to the actual situation.

[0087] In the existing technology, oscillation is an inherent characteristic of wind turbines, especially offshore wind turbines. As an auxiliary device within the wind turbine, the lifting device also oscillates accordingly. Therefore, the mutual wear between the drive gear 211 and guide wheel assembly 300 and the rack and pinion ladder 30 in the lifting device will be very rapid. Once the drive gear 211, guide wheel assembly 300 or rack and pinion ladder 30 is worn excessively, it can only be replaced. However, the offshore environment is relatively harsh, which greatly hinders the maintenance of wind turbines. Therefore, the wear between the drive gear 211, guide wheel assembly 300 and rack and pinion puts a great burden on the maintenance of the lifting device.

[0088] It is understandable that the lifting device will be docked on the docking platform at the bottom of the tower most of the time. In the wind turbine provided in this embodiment of the utility model, the radial movement of the lifting device is restricted by setting a limiting base 40. In this way, the wear of the drive gear 211, guide wheel assembly 300 and rack and pinion ladder 30 can be reduced, and the service life of the drive gear 211, guide wheel assembly 300 and rack and pinion ladder 30 can be increased, thereby effectively reducing the maintenance cost of the lifting device.

[0089] It should be noted that the technical solutions in the various embodiments of this utility model can be combined with each other, but the basis for such combination is that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist, that is, it is not within the protection scope of this utility model.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A backpack frame for a lifting device, characterized in that, It includes a support assembly (100), a drive assembly (200), and a guide wheel assembly (300). The drive assembly (200) and the guide wheel assembly (300) are respectively located at corresponding positions of the support assembly (100). The drive assembly (200) and the guide wheel assembly (300) are used to move up and down along the rack and pinion ladder (30). The support assembly (100) is used to install the car (20).

2. The backpack frame for the lifting device according to claim 1, characterized in that, The support assembly (100) includes a first support member (110) and a second support member (120), wherein the second support member (120) is vertically disposed at the lower end of the first support member (110) and extends in a direction away from the first support member (110); The drive assembly (200) and the guide wheel assembly (300) are respectively disposed at corresponding positions on the first support member (110). The first support member (110) and the second support member (120) together form a mounting part (130), which is used to mount the car (20).

3. The backpack frame for the lifting device according to claim 2, characterized in that, The second support component (120) includes a second support frame (121), a base plate (122), and a buffer (123). The second support frame (121) is vertically disposed at the lower end of the first support component (110) and extends in a direction away from the first support component (110). The base plate (122) is located above the second support frame (121) and is used to form the mounting part (130); the buffer (123) is located between the base plate (122) and the second support frame (121).

4. The backpack frame for the lifting device according to claim 2, characterized in that, The first support component (110) and the second support component (120) are detachably connected.

5. The backpack frame for the lifting device according to claim 1, characterized in that, It also includes a lubrication assembly (400), which is disposed on the support assembly (100) and located above the drive assembly (200), and the lubrication assembly (400) is used to lubricate the rack of the rack ladder (30).

6. The backpack frame for the lifting device according to claim 5, characterized in that, The lubrication assembly (400) includes: A lubrication pump (410) is provided on the support assembly (100), the lubrication pump (410) being used to pump lubricating oil; An oil pipe (420) is connected to the output end of the lubrication pump (410), and the oil pipe (420) is used to transport lubricating oil; A felt wheel (430) is provided on the support assembly (100) and located directly above the drive gear (211) of the drive assembly (200); the felt wheel (430) is connected to the output end of the oil pipe (420) and is used to lubricate the rack of the rack ladder (30).

7. The backpack frame for the lifting device according to claim 6, characterized in that, The walking surface of the felt wheel (430) is provided with a plurality of oil outlet holes (431) at even intervals, and each of the oil outlet holes (431) is connected to the output end of the oil pipe (420).

8. The backpack frame for the lifting device according to claim 5, characterized in that, It also includes an oil collection assembly (500), which includes an oil collection box (510) and a scraper (520). The oil collection box (510) is located on the support assembly (100), and the opening of the oil collection box (510) is located directly below the drive gear (211) of the drive assembly (200). The scraper (520) is located at the opening of the oil collection box (510) and is used to scrape the lubricating oil on the rack of the rack ladder (30) into the oil collection box (510).

9. The backpack frame for the lifting device according to any one of claims 1 to 8, characterized in that, The drive assembly (200) includes a drive component (210), a drive motor (220), and a centrifugal speed limiter (230). One end of the centrifugal speed limiter (230) is connected to the drive motor (220), and the other end is connected to the drive component (210). The drive component (210) is used to move up and down along the rack and pinion ladder (30).

10. A lifting device, characterized in that, Includes a car (20) and a backpack rack (10) as described in any one of claims 1 to 9, wherein the car (20) is disposed on the backpack rack (10) and the backpack rack (10) is used for lifting and lowering along a rack and pinion ladder (30).

11. A wind turbine generator, characterized in that, The device includes a tower, a rack and pinion ladder (30), a limiting base (40), and a lifting device as described in claim 10. The rack and pinion ladder (30) is located on the tower and extends along the height direction of the tower. The lifting device is used to perform lifting and lowering movements along the rack and pinion ladder (30). The limiting base (40) is located at the bottom of the tower and directly below the lifting device. When the lifting device is stopped at the limiting base (40), the limiting base (40) is used to restrict the radial movement of the lifting device.

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