Bolt assembling device

Abstract

The utility model discloses a bolt assembling device which comprises a machine frame, a transferring device and a plurality of tightening devices, tightening stations are formed on the machine frame, a conveying channel is formed on the machine frame, the tightening stations are located on the conveying channel, and the transferring device is located on the conveying channel. The conveying device is used for conveying the fan hub to be assembled to the tightening station along the conveying channel, and the multiple tightening devices are arranged on the rack and can conduct primary tightening and final tightening on bolts to be assembled on multiple faces to be assembled on the fan hub at the same time. Therefore, primary screwing and final screwing of the to-be-assembled bolts on the multiple to-be-assembled faces on the fan hub are achieved at the same time, fastening work on the fan bolts is completed at the same time, and then the assembling efficiency of the to-be-assembled bolts on the fan hub is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine production equipment, in particular to a bolt assembly device. Background Art

[0002] Competition in the wind power market and the development of wind power technology have led wind turbines to continuously develop in the direction of high power and high hub height, which inevitably leads to difficulties in tightening the hub bolts and the difficulty and danger of manual operations.

[0003] Traditionally, wheel hub bolts are tightened manually using electric tools or automatically by a single robot. When they are transferred to the next process, they are often hoisted and transported. Manual labor is intensive, unsafe, quality cannot be guaranteed, work efficiency is low, and single robot operation efficiency is low, making circulation more difficult.

[0004] Existing technical problems;

[0005] 1. Manual tightening has high labor intensity, low efficiency and poor quality controllability;

[0006] 2. The efficiency of single robot tightening operation is low, and the hoisting method to transfer the wheel hub poses a great safety risk and the fluidity of the production line is poor. Utility Model Content

[0007] The main purpose of the utility model is to propose a bolt assembly device, which aims to provide a. To achieve the above purpose, the bolt assembly device proposed by the utility model includes:

[0008] A frame, a tightening station is formed on the frame, a conveying channel is formed on the frame, and the tightening station is located on the conveying channel;

[0009] A conveying device, used for conveying the fan hub to be assembled along the conveying channel to the tightening station; and

[0010] A plurality of tightening devices are separately arranged on the frame, and the plurality of tightening devices can simultaneously perform initial tightening and final tightening on the bolts to be assembled on the plurality of surfaces to be assembled on the fan hub.

[0011] Optionally, at least one of the multiple tightening devices is movable relative to the frame, and can avoid transferring the fan hub from other workstations to the tightening station, and after the fan hub is in place, can be transferred to a surface to be assembled with the fan hub.

[0012] Optionally, each of the tightening devices comprises:

[0013] A suspension part, suspended and installed on the frame;

[0014] a movable connection portion, movably mounted relative to the suspension portion; and

[0015] The tightening part is arranged on the movable connection part.

[0016] Optionally, the conveying channel extends in the longitudinal direction;

[0017] The plurality of tightening devices include a first tightening device, and a suspension portion of the first tightening device is installed on the frame in a lateral movable manner.

[0018] Optionally, the transfer device includes a heavy-load automatic guided vehicle and / or a rail-guided vehicle.

[0019] Optionally, the tightening device further includes a floating structure, and the floating structure includes:

[0020] two fixing plates, the fixing plates being spaced apart in an up-and-down direction;

[0021] A floating plate, with a groove formed on its upper side and a first matching portion formed on its lower side, wherein a floating roller is arranged in the groove;

[0022] A first follower plate is disposed above the floating plate and limits the floating roller to be located between the floating plate and the follower plate;

[0023] A second follower plate is disposed below the floating plate and has a second matching portion formed above the circumference of the floating plate;

[0024] A sliding connection portion, which can slide between the floating plate and the second follower plate;

[0025] A third follower plate, fixedly connected to the upper part of the second follower plate;

[0026] Among them, the floating roller, the floating plate, the first follower plate, the second follower plate and the third follower plate are all arranged between the two fixed plates, the first follower plate, the second follower plate and the third follower plate are fixedly connected, and the floating plate, the first follower plate, the second follower plate and the third follower plate are all provided with avoidance holes in the middle part for installing the tightening part.

[0027] Optionally, a plurality of grooves are evenly provided along the circumference direction of the floating plate, and a plurality of corresponding floating rollers are provided.

[0028] Optionally, the tightening device further comprises:

[0029] A sensing unit, used to collect characteristic information of the bolt to be assembled; and

[0030] The identification unit is used to determine whether the bolt to be assembled matches the current bolt assembly operation according to the characteristic information of the bolt to be assembled.

[0031] Optionally, the sensing unit includes a laser, and the identifying unit includes a camera.

[0032] Optionally, the tightening device further includes a reaction arm for counteracting the torque when the tightening part rotates.

[0033] In the technical solution of the utility model, a bolt assembly device is proposed, which includes a frame, a transfer device and a plurality of tightening devices. A tightening station is formed on the frame, a conveying channel is formed on the frame, the tightening station is located on the conveying channel, the transfer device is used to convey the fan hub to be assembled to the tightening station along the conveying channel, and a plurality of tightening devices are arranged on the frame. The plurality of tightening devices can simultaneously perform initial tightening and final tightening of the bolts to be assembled on the plurality of surfaces to be assembled on the fan hub, and simultaneously complete the tightening work on the fan bolts, thereby improving the assembly efficiency of the bolts to be assembled on the fan hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a bolt assembly device provided by the utility model;

[0036] Figure 2 for Figure 1 A front view of the bolt assembly device in FIG.

[0037] Figure 3 for Figure 1 A top view of the bolt assembly device in FIG.

[0038] Figure 4 for Figure 1 A side view of the bolt assembly device in FIG.

[0039] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the floating structure of the bolt assembly device.

[0040] Description of Figure Numbers:

[0041]

[0042]

[0043] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in Figure 1). If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0047] Competition in the wind power market and the development of wind power technology have led wind turbines to continuously develop in the direction of high power and high hub height, which inevitably leads to difficulties in tightening the hub bolts and the difficulty and danger of manual operations.

[0048] Traditionally, wheel hub bolts are tightened manually using electric tools or automatically by a single robot. When they are transferred to the next process, they are often hoisted and transported. Manual labor is intensive, unsafe, quality cannot be guaranteed, work efficiency is low, and single robot operation efficiency is low, making circulation more difficult.

[0049] Existing technical problems;

[0050] 1. Manual tightening has high labor intensity, low efficiency and poor quality controllability;

[0051] 2. The efficiency of single robot tightening operation is low, and the hoisting method to transfer the wheel hub poses a great safety risk and the fluidity of the production line is poor.

[0052] In view of this, the utility model provides a bolt assembly device. Figures 1 to 5 The present invention provides a bolt assembly device according to an embodiment of the present invention. Figure 1 A three-dimensional structural schematic diagram of an embodiment of a bolt assembly device provided by the utility model; Figure 2 for Figure 1 A front view of the bolt assembly device in FIG. Figure 3 for Figure 1 A top view of the bolt assembly device in FIG. Figure 4 for Figure 1 A side view of the bolt assembly device in FIG. Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the floating structure of the bolt assembly device.

[0053] See also Figure 1 , is a schematic diagram of an embodiment of the utility model, which proposes a bolt assembly device 100, wherein the bolt assembly device 100 includes a frame 1, a transfer device 2 and a plurality of tightening devices, wherein a tightening station is formed on the frame 1, a conveying channel is formed on the frame 1, the tightening station is located on the conveying channel, the transfer device 2 is used to convey the fan hub 5 to be assembled along the conveying channel to the tightening station, and the plurality of tightening devices are separately arranged on the frame 1, and the plurality of tightening devices can simultaneously perform initial tightening and final tightening on the bolts to be assembled on the plurality of surfaces to be assembled on the fan hub 5.

[0054] In the technical solution of the utility model, a bolt assembly device 100 is proposed, and the bolt assembly device 100 includes a frame 1, a transfer device 2 and a plurality of tightening devices. A tightening station is formed on the frame 1, a conveying channel is formed on the frame 1, the tightening station is located on the conveying channel, the transfer device 2 is used to convey the fan hub 5 to be assembled to the tightening station along the conveying channel, and a plurality of tightening devices are arranged on the frame 1. The plurality of tightening devices can simultaneously perform initial tightening and final tightening on the bolts to be assembled on the plurality of surfaces to be assembled on the fan hub 5, and simultaneously complete the tightening work on the fan bolts, thereby improving the assembly efficiency of the bolts to be assembled on the fan hub 5.

[0055] Among them, the initial tightening and final tightening of the bolts on the fan hub 5 are important steps in the installation process of the fan, and they are crucial to ensuring the stability and safety of the fan. The main purpose of the initial tightening is to pre-tighten the bolts to a certain pre-tightening force so that the load can be better distributed and prevented from loosening during the subsequent final tightening. During the initial tightening, appropriate tools (such as torque wrenches) should be used to pre-tighten according to the specified torque value. The size of the pre-tightening force should be determined according to the design requirements and the specifications of the bolts to ensure that the bolts can withstand a certain load without loosening after the initial tightening. Final tightening is to perform the final tightening of the bolts on the basis of the initial tightening. The purpose of the final tightening is to ensure that the bolts reach the required final pre-tightening force to meet the operating requirements of the fan. During the final tightening, tools such as torque wrenches are also required to tighten according to the specified torque value. During the final tightening process, attention should be paid to controlling the tightening sequence and tightening speed of the bolts to avoid loosening or damage of the bolts due to excessive tightening or improper sequence.

[0056] Before the initial tightening and final tightening, ensure that the bolt hole position is accurate, clean, and free of oil and impurities to ensure that the bolt can be tightened smoothly. During the tightening process, the tightening of the bolts should be checked regularly to ensure that each bolt reaches the specified preload. If the bolts are found to be loose or damaged, they should be replaced and retightened in time. For the connection of large fans or important components, it is recommended to recheck after the initial tightening and final tightening to ensure that the tightening state of the bolts meets the requirements. During use, the tightening state of the bolts should be checked regularly. If looseness or damage is found, it should be handled in time to avoid affecting the normal operation and safety performance of the fan. In short, the initial tightening and final tightening of the bolts on the fan hub 5 are important steps to ensure the stability and safety of the fan. During the operation, the prescribed methods and precautions should be strictly followed to ensure that each bolt reaches the specified preload and maintains a good tightening state. In this embodiment, multiple tightening devices can be used to simultaneously perform initial tightening and final tightening of the bolts to be assembled on multiple assembly surfaces on the fan hub 5, and the function of each of the tightening devices is to perform initial tightening and final tightening of the bolts to be assembled on the assembly surfaces of the fan hub 5.

[0057] In order to facilitate the movement of the fan hub 5 from other stations to the tightening station through the conveying channel, in this embodiment, at least one of the multiple tightening devices is moved relative to the frame 1, so as to avoid the fan hub 5 from being transported from other stations to the tightening station, and after the fan hub 5 is in place, it can be moved to align with a to-be-assembled surface of the fan hub 5. Figures 2 to 4, wherein the tightening device can be set to multiple according to the multiple faces of the fan hub 5. The fan hub 5 has three faces to be assembled, wherein the angle between each two adjacent fan hubs 5 is 60°, and the corresponding tightening device operates perpendicularly to the assembly face of the fan hub 5, so the angle between the two corresponding tightening devices is 120°. The tightening device that operates the assembly face of the fan hub 5 perpendicular to the conveying channel can be set to move relative to the frame 1, so as to avoid the fan hub 5 from entering and exiting the tightening station. The other two tightening devices can be fixedly set on the frame 1 at an angle of 120° near the tightening station, or can be slidably set on the frame 1 relative to the frame 1.

[0058] Further, each of the tightening devices includes a suspension portion 31, an active connection portion 32 and a tightening portion 33. The suspension portion 31 is suspended and installed on the frame 1, and the active connection portion 32 is movably installed relative to the suspension portion 31. It can be seen that a six-axis robot is used in this embodiment to achieve movement with multiple degrees of freedom, but it is obviously not limited to this. As long as the movable structure can achieve movement relative to the suspension portion 31, it is within the protection scope of this application. The tightening portion 33 is arranged on the active connection portion 32, so that the tightening portion 33 can move with multiple degrees of freedom relative to the suspension portion 31.

[0059] Further, the conveying channel extends in the longitudinal direction, and the plurality of tightening devices include a first tightening device 34, and the suspension portion 31 of the first tightening device 34 is installed on the frame 1 in a lateral movable manner. The sliding connection method between the suspension portion 31 of the first tightening device 34 and the frame 1 is not limited, and can be referred to Figure 1 to Figure 2 , it can be connected by setting a slide rail. In another embodiment, a pin connection can also be used to set the moving direction of the first tightening device 34 and the direction of the in-and-out transportation of the fan hub 5 to 90°, so that the fan hub 5 can be avoided more conveniently and quickly, and the conveying channel of the fan hub 5 can be avoided at the highest speed.

[0060] See also Figure 4, wherein the transfer device 2 includes a heavy-duty automatic guided vehicle 2a and / or a rail-guided vehicle 2b, wherein the heavy-duty automatic guided vehicle 2a is an industrial vehicle that loads goods automatically or manually, automatically drives along a set route or pulls a cargo trolley to a designated location, and then automatically or manually loads and unloads goods. The running path and destination can be controlled by a management program, with strong maneuverability, and the line change of certain guiding methods is very convenient and flexible, with low setting cost. The station recognition ability and positioning accuracy are high, and it has the ability to coordinate with various processing equipment. With the support of the communication system and the scheduling of the management system, flexible control of logistics can be achieved, and the loading platform can adopt different installation structures and loading and unloading methods to meet the needs of transportation and processing of different products. Therefore, the logistics system has strong adaptability. It can be equipped with a variety of sound and light alarm systems, and can automatically stop before colliding with obstacles through the vehicle-mounted obstacle detection system. When it travels in a queue or crosses in a certain area, it has the self-control ability to avoid mutual collision, and there is no human error. Obviously, the transfer device 2 is not limited thereto, as long as it is used to transfer the fan hub 5 in and out of the tightening station. The rail-guided vehicle 2b can be used in various warehouses with high-density storage, and the vehicle channel can be designed to be arbitrarily long, which can increase the storage capacity of the entire warehouse, and there is no need for a forklift to enter the lane during operation, making it safer.

[0061] In addition, see Figure 5In this embodiment, the tightening device also includes a floating structure 4, which includes two fixed plates 41, a floating plate 42, a first follower plate 43, a second follower plate 44, a sliding connection portion 46 and a third follower plate 45. The two fixed plates 41 are spaced apart in the up-down direction. The floating plate 42 is provided with a groove on its upper side and a first matching portion on its lower side. A floating roller 47 is provided in the groove. The first follower plate 43 is provided above the floating plate 42 to limit the floating roller 47 between the floating plate 42 and the follower plate. The second follower plate 44 is provided below the floating plate 42 and is located above the circumference direction of the floating plate 42. A second matching portion is provided, and the sliding connection portion 46 can slide between the floating plate 42 and the second follower plate 44, and the third follower plate 45 is fixedly connected above the second follower plate 44, wherein the floating roller 47, the floating plate 42, the first follower plate 43, the second follower plate 44 and the third follower plate 45 are all arranged between the two fixed plates 41, and the first follower plate 43, the second follower plate 44 and the third follower plate 45 are fixedly connected, and the floating plate 42, the first follower plate 43, the second follower plate 44 and the third follower plate 45 are all provided with avoidance holes in the middle part for installing the tightening portion 33. The rotation of the sliding roller drives the floating plate 42 to float up and down, thereby allowing the sliding connection portion 46 to slide in the up and down directions, so that the second follower plate 44 and the floating plate 42 can move relatively, so that the tightening portion 33 can be finely adjusted. There is no restriction on the fixed connection method, and it can be achieved by screw and bolt connection, nail connection, welding, threaded connection, gluing connection and the like.

[0062] Furthermore, a plurality of grooves can be evenly opened along the circumference direction of the floating plate 42, and a plurality of corresponding floating rollers 47 can be provided. Such a configuration can drive the entire floating plate 42 to rotate along with the floating rollers 47, so that the floating structure 4 can float more flexibly and have a wider range of movement.

[0063] In addition, the tightening device also includes a sensing part 35 and an identification part 36. The sensing part 35 is used to collect the characteristic information of the bolt to be assembled, and the identification part 36 is used to determine whether the bolt to be assembled matches the current bolt assembly operation according to the characteristic information of the bolt to be assembled. The sensing part 35 preliminarily senses the position information of the bolt to be assembled, and transmits the position information to the identification part 36. After obtaining the position information, the identification part 36 determines whether the bolt to be assembled matches the current bolt assembly operation according to the characteristic information of the bolt to be assembled.

[0064] In this embodiment, the sensing unit 35 includes a laser, which emits laser to obtain the position of the bolt to be assembled. In another embodiment, the sensing unit 35 may also include a sensor. The identification unit 36 ​​includes a camera, which determines whether the bolt to be assembled matches the current bolt assembly operation based on the characteristic information of the bolt to be assembled after acquiring the position by photographing. In another embodiment, a scanner may also be included.

[0065] In addition, the tightening device also includes a reaction arm 37. By fully considering the influence of the reaction arm 37 in the design and adjusting the force balance between the connecting parts by increasing the friction and tension, the stability of the connection is ensured. In simple terms, when we consider the reaction arm 37, a reverse torque can be generated by increasing the friction and tension between the bolt and the nut. This reverse torque can offset the torque between the connecting parts, thereby making the connecting parts more stable. In this way, even when subjected to external torque, the connecting parts can maintain good stability and are not prone to loosening or damage. Therefore, the principle of the reaction arm 37 to eliminate torque is to offset the effect of external torque through reasonable design and increase the friction and tension between the connecting parts, thereby ensuring the stability and reliability of the connection.

[0066] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A bolt assembly device for bolt installation of a fan hub, wherein the fan hub has a plurality of surfaces to be assembled, characterized in that: The bolt assembly device comprises: A frame, a tightening station is formed on the frame, a conveying channel is formed on the frame, and the tightening station is located on the conveying channel; A conveying device, used for conveying the fan hub to be assembled along the conveying channel to the tightening station; and A plurality of tightening devices are separately arranged on the frame, and the plurality of tightening devices can simultaneously perform initial tightening and final tightening of the bolts to be assembled on the plurality of surfaces to be assembled on the fan hub; At least one of the plurality of tightening devices is movable relative to the frame, and can avoid transferring the fan hub from other workstations to the tightening workstation, and after the fan hub is in place, can be transferred to align with a to-be-assembled surface of the fan hub; Each of the tightening devices comprises: A suspension part, suspended and installed on the frame; a movable connection portion, movably mounted relative to the suspension portion; and A tightening part, provided on the movable connection part; The tightening device further comprises a floating structure, wherein the floating structure comprises: two fixing plates, the fixing plates being spaced apart in an up-and-down direction; A floating plate, with a groove formed on its upper side and a first matching portion formed on its lower side, wherein a floating roller is arranged in the groove; A first follower plate is disposed above the floating plate and limits the floating roller to be located between the floating plate and the follower plate; A second follower plate is disposed below the floating plate and has a second matching portion formed above the circumference of the floating plate; A sliding connection portion, which can slide between the floating plate and the second follower plate; A third follower plate, fixedly connected to the upper part of the second follower plate; Among them, the floating roller, the floating plate, the first follower plate, the second follower plate and the third follower plate are all arranged between the two fixed plates, the first follower plate, the second follower plate and the third follower plate are fixedly connected, and the floating plate, the first follower plate, the second follower plate and the third follower plate are all provided with avoidance holes in the middle part for installing the tightening part.

2. The bolt assembly device according to claim 1, characterized in that: The conveying channel extends in the longitudinal direction; The plurality of tightening devices include a first tightening device, and a suspension portion of the first tightening device is installed on the frame in a lateral movable manner.

3. The bolt assembly device according to claim 1, characterized in that: The transfer device includes a heavy-load automatic guided vehicle and / or a rail-guided vehicle.

4. The bolt assembly device according to claim 1, characterized in that: A plurality of grooves are evenly arranged along the circumference direction of the floating plate, and a plurality of corresponding floating rollers are arranged.

5. The bolt assembly device according to claim 1, characterized in that: The tightening device also includes: A sensing unit, used to collect characteristic information of the bolt to be assembled; and The identification unit is used to determine whether the bolt to be assembled matches the current bolt assembly operation according to the characteristic information of the bolt to be assembled.

6. The bolt assembly device according to claim 5, characterized in that: The sensing unit includes a laser, and the identifying unit includes a camera.

7. The bolt assembly device according to claim 1, characterized in that: The tightening device also includes a reaction arm for counteracting the torque when the tightening part rotates.

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