Bolt tightening device

Abstract

The utility model discloses a bolt tightening device which comprises a base frame, a rotating structure and a tightening assembly, and the base frame is provided with an installation base capable of moving in the first direction. The rotating structure is rotationally arranged on the mounting base along the axis of the first direction, and the rotating structure is provided with two tightening ends which are aligned in the radial direction of the rotating structure; the tightening assembly comprises two tightening sleeves, and the two tightening sleeves are arranged at the two tightening ends correspondingly, rotationally arranged along the axis where the first direction is located and used for tightening end face bolts of the speed increasing box. The problems of long time consumption and low efficiency of manually screwing the transmission chain spindle and the gearbox end face bolt are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt tightening, in particular to a bolt tightening device. Background Art

[0002] As the megawatt of wind turbines increases, the connection form of the transmission chain has changed from the original tension ring lock connection to the end bolt connection between the main shaft and the speed increaser. This change directly leads to a change in the bolt locking process, from the previous external tightening operation of the main shaft to entering the internal space of the main shaft to complete the tightening of the bolts. However, the main shaft end bolts are generally 54 or 58, and the operating time of the operators is 8-12 hours, resulting in a high labor intensity for the operators and a low efficiency in bolt tightening. Utility Model Content

[0003] The main purpose of the utility model is to provide a bolt tightening device, aiming to solve the problem of long time consumption and low efficiency in the existing manual tightening of the bolts between the main shaft of the transmission chain and the end face of the speed increaser.

[0004] In order to achieve the above-mentioned purpose, the bolt tightening device proposed by the utility model comprises:

[0005] A base frame, on which a mounting seat movable along a first direction is disposed;

[0006] A rotating structure is rotatably disposed on the mounting seat along an axis in a first direction, and the rotating structure has two tightening ends radially opposite to the rotating structure; and

[0007] The tightening assembly comprises two tightening sleeves, which are respectively arranged at the two tightening ends and are rotatably arranged along the axis in the first direction to tighten the end face bolts of the speed increasing box.

[0008] In one embodiment, the two tightening ends and the two tightening sleeves correspondingly form a sleeve group, and the sleeve group is provided in multiple groups and arranged along the circumference of the rotating structure.

[0009] In one embodiment, a bolt tightening gun is disposed at the tightening end of the rotating structure corresponding to the tightening end, and the bolt tightening gun includes the tightening sleeve.

[0010] In one embodiment, the tightening sleeve is floatable along the first direction.

[0011] In one embodiment, the bolt tightening device includes a rotation driving device, which is disposed on the mounting seat and can drive the rotating structure to intermittently rotate at equal angles.

[0012] In one embodiment, a visual recognition device is provided on the rotating structure corresponding to the tightening sleeve.

[0013] In one embodiment, the bolt tightening device further comprises a servo drive device, the servo drive device is arranged on the base frame and has a drive part movable along a first direction, the drive part is arranged on the mounting seat; and / or,

[0014] The bolt tightening device further comprises a guide assembly, wherein the guide assembly is arranged between the base frame and the mounting seat to limit the movement of the mounting seat in a first direction.

[0015] In one embodiment, the bolt tightening device further includes a counterweight structure;

[0016] The base frame has two mounting ends opposite to each other along a first direction, and the mounting seat and the counterweight structure are respectively arranged corresponding to the two mounting ends.

[0017] In one embodiment, two hanging bolts are formed on the base frame and are arranged in a counter-positioned manner along the second direction, and the two hanging bolts are respectively used to be connected to the outer threaded holes on the main shaft of the wind turbine generator set;

[0018] The second direction and the first direction are two directions perpendicular to each other.

[0019] In one embodiment, the mounting seat is elongated in the first direction, and the rotating structure is disposed on an end of the mounting seat away from the base.

[0020] In the technical solution provided by the utility model, the rotating structure has two tightening ends opposite to each other in its radial direction, and can also be rotatably arranged on the mounting seat along the axis in the first direction, and the mounting seat can move along the first direction. In the locking scenario of the end face bolts of the transmission chain main shaft and the speed increaser of the wind turbine generator set, after the base frame is installed in place, the central axis of the rotating structure and the transmission chain main shaft are in line, and the end face bolts of the speed increaser are evenly distributed on the circumferential side of the rotating structure. The movement of the mounting seat in the first direction can drive the two tightening sleeves on the tightening end to reach the bolt tightening operation point and be inserted into the corresponding group (two) of end face bolts. After driving the two tightening sleeves to rotate and tighten, the mounting seat can drive the two tightening sleeves to disengage the end face bolts, and then the rotating structure can drive the two tightening sleeves to rotate to the next group of end face bolts, and then repeat the above actions to complete the tightening operation of all end face bolts.

[0021] In the present technical solution, since the two tightening ends are located at the radial ends of the rotating structure, through the synchronous tightening operation of the two tightening sleeves, two symmetrical ones of the multiple end bolts can be tightened at the same time, ensuring that the tensile force of the end bolts is consistent, thereby improving the tightening quality of the end bolts. At the same time, the tightening operation efficiency is greatly improved, reducing the labor intensity of the operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 The present invention is a schematic structural diagram of an embodiment of a bolt tightening device provided by the present invention.

[0024] Description of Figure Numbers:

[0025] Label name Label name 100 Bolt tightening device 311 Tightening sleeve 1 Scaffolding 4 Rotary drive 1a Mounting Block 5 Visual recognition device 2 Rotating structure 6 Servo drive 21 Tightening end 7 Guide components 3 Tightening components 8 Counterweight structure 31 Bolt tightening gun 9 Lifting bolts

[0026] 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

[0027] 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.

[0028] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0029] 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 the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. 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 and is not within the scope of protection required by the utility model.

[0030] As the megawatt of wind turbines increases, the connection form of the transmission chain has changed from the original tension ring lock connection to the end bolt connection between the main shaft and the speed increaser. This change directly leads to a change in the bolt locking process, from the previous external tightening operation of the main shaft to entering the internal space of the main shaft to complete the tightening of the bolts. However, the main shaft end bolts are generally 54 or 58, and the operating time of the operators is 8-12 hours, resulting in a high labor intensity for the operators and a low efficiency in bolt tightening.

[0031] Based on the above reasons, during the tightening process of the bolts, it is only necessary to gradually rotate and tighten multiple bolts through a mechanical device to reduce the labor intensity of the operators and improve the tightening efficiency.

[0032] In view of this, the utility model proposes a bolt tightening device, which aims to solve the problem that the existing manual tightening of the bolts between the main shaft of the transmission chain and the end face of the speed increaser is time-consuming and inefficient, wherein: Figure 1 The present invention is a schematic structural diagram of an embodiment of a bolt tightening device provided by the present invention.

[0033] See also Figure 1 The bolt tightening device 100 includes a base frame 1, a rotating structure 2 and a tightening assembly 3. The base frame 1 is provided with a mounting seat 1a that is movable along a first direction; the rotating structure 2 is rotatably arranged on the mounting seat 1a along the axis in the first direction, and the rotating structure 2 has two tightening ends 21 radially aligned therewith; the tightening assembly 3 has two tightening sleeves 311, which are respectively arranged at the two tightening ends 21 and rotatably arranged along the axis in the first direction, so as to tighten the end face bolts of the speed increaser.

[0034] It should be noted that the transmission chain main shaft has an outer circle threaded hole and an inner circle threaded hole. After the speed increaser and the transmission chain main shaft are installed, the end bolts on the speed increaser will pass through the inner circle thread of the transmission chain main shaft and enter the inner cavity of the transmission chain main shaft. After that, tightening the end bolts can complete the locking of the transmission chain main shaft and the speed increaser. At the same time, tightening the end bolts of the transmission chain main shaft and the speed increaser is only one of the application scenarios of the bolt tightening device 100 provided in this application. The bolt tightening device 100 can also be used in any other multi-bolt tightening scenarios distributed along the circumference, which will not be elaborated in this application.

[0035] It should be noted that the driving source of the mounting seat 1a on the base 1, the driving source of the rotating structure 2 on the mounting seat 1a, and the driving source of the tightening sleeve 311 on the tightening end 21 can be in various forms, which are not limited in this embodiment.

[0036] In the technical solution provided by the utility model, the rotating structure 2 has two tightening ends 21 opposite to each other in its radial direction, and can also be rotatably arranged on the mounting seat 1a along the axis in the first direction, and the mounting seat 1a can move along the first direction. In the locking scenario of the end bolts of the transmission chain main shaft and the speed increaser of the wind turbine generator set, after the base frame 1 is installed in place, the rotating structure 2 is collinear with the central axis of the transmission chain main shaft, and the end bolts of the speed increaser are evenly distributed on the circumference of the rotating structure 2. The movement of the mounting seat 1a in the first direction can drive the two tightening sleeves 311 on the tightening end 21 to reach the bolt tightening operation point and insert them into the corresponding group (two) of end bolts. After driving the two tightening sleeves 311 to rotate and tighten, the mounting seat 1a can drive the two tightening sleeves 311 to disengage the end bolts, and then the rotating structure 2 can drive the two tightening sleeves 311 to rotate to the next group of end bolts, and then repeat the above actions to complete the tightening operation of all end bolts.

[0037] In the present technical solution, since the two tightening ends 21 are located at the radial ends of the rotating structure 2, through the synchronous tightening operation of the two tightening sleeves 311, two symmetrical ones of the multiple end bolts can be tightened at the same time, ensuring that the tensile force of the end bolts is consistent, thereby improving the tightening quality of the end bolts. At the same time, the tightening operation efficiency is greatly improved, reducing the labor intensity of the operators.

[0038] Based on the reason that tightening the two end bolts in the above-mentioned position at the same time can improve the tightening quality, in some embodiments, the two tightening ends 21 and the two tightening sleeves 311 form a sleeve group, and multiple sleeve groups are provided and arranged along the circumference of the rotating structure 2. By providing multiple sleeve groups, the tightening efficiency of the bolt tightening device 100 can be doubled.

[0039] The two tightening sleeves 311 may belong to the same driving source, and the synchronous driving of the two tightening sleeves 311 can be completed by the combination of the driving structure and the synchronous transmission structure. The present application does not limit the structure of the driving source, and of course it can belong to different driving sources. For example, in some embodiments, the rotating structure 2 is provided with a bolt tightening gun 31 corresponding to the tightening end 21, and the bolt tightening gun 31 includes a tightening sleeve 311. Since the bolt tightening gun 31 is a commonly used device for tightening bolts, integrating it into the bolt tightening device 100 can reduce the design and manufacture of the driving source, thereby reducing the manufacturing cost of the bolt tightening device 100. At the same time, the bolt tightening gun 31 is an electric drive device, which can complete the synchronous driving of the two tightening sleeves 311 under the control of the same control device.

[0040] It is understandable that there are also requirements for the fitting angle of the tightening sleeve 311 and the end face bolt. Only when the tightening sleeve 311 and the end face bolt are correctly aligned, the tightening sleeve 311 can be directly inserted into the end face bolt under the drive of the mounting seat 1a. In order to ensure that the tightening sleeve 311 can be accurately fitted into the end face bolt every time, the operator may need to uniformly adjust the initial angle of the end face bolt, but this will undoubtedly increase the workload of the operator. In view of this, in some embodiments, the tightening sleeve 311 can be floated along the first direction. With such arrangement, after the mounting seat 1a moves into position, if the tightening sleeve 311 fails to be directly inserted into the end face bolt, the tightening sleeve 311 can float backward due to the abutment of the end face bolt, and in the subsequent tightening rotation process, the tightening sleeve 311 can always coincide with the angle of the end face bolt. At this time, the tightening sleeve 311 can be inserted into the end face bolt under the drive of the reset force, thereby completing the fitting and tightening actions in turn, thereby ensuring the bolt tightening efficiency.

[0041] It is understandable that, in view of the fact that the multiple end bolts of the speed increaser are distributed at equal angles on the circumference, in some embodiments, the bolt tightening device 100 includes a rotary drive device 4, which is arranged on the mounting seat 1a and can drive the rotating structure 2 to intermittently rotate at equal angles. It should be noted that there are many structural types of the rotary drive device 4. For example, a rotary indexing mechanism can be used in combination with a drive device to achieve intermittent rotation of the rotating structure 2 at equal angles. This embodiment does not limit this. The angle of each rotation can be set according to the distribution angle of the end bolts, so that the rotary drive device 4 can drive the rotating structure 2 to accurately align to multiple bolt tightening operation points, avoiding repeated alignment of the tightening sleeve 311 and the end bolts, and improving the bolt tightening efficiency.

[0042] It is understandable that after the mounting seat 1a drives the rotating structure 2 to move to the inner cavity of the transmission chain main shaft, due to the existence of factors such as installation errors or structural errors, the two tightening sleeves 311 may not necessarily be aligned with the end face bolts, so it is necessary to adjust the angular position of the rotating structure 2. In view of this, in some embodiments, a visual recognition device 5 is provided on the rotating structure 2 corresponding to the tightening sleeve 311. Through the recognition and judgment of the visual recognition device 5, the alignment of the tightening sleeve 311 and the end face bolt can be transmitted to the operator through image information or sound information, thereby guiding the operator to efficiently adjust the angular position of the rotating structure 2, thereby improving the alignment efficiency of the tightening sleeve 311 and the end face bolt.

[0043] In some embodiments, the rotating structure 2 is rotationally driven by a rotating drive device 4, and the visual recognition device 5 is electrically feedback connected to the rotating drive device 4 through a control device, thereby being able to complete the automatic alignment action of the tightening sleeve 311, further improving the alignment efficiency between the tightening sleeve 311 and the end face bolt.

[0044] In some embodiments, the bolt tightening device 100 further includes a servo drive device 6, which is disposed on the base frame 1 and has a drive portion movable along a first direction, and the drive portion is disposed on the mounting seat 1a; and / or,

[0045] The bolt tightening device 100 further includes a guide assembly 7, which is disposed between the base frame 1 and the mounting seat 1a to limit the movement of the mounting seat 1a in a first direction.

[0046] It should be noted that the above two parallel technical features can be combined to form three groups of technical solutions, and the two can be set either one or both. Obviously, the effect of setting them both is better. The specific structure of the servo drive device 6 is not limited in this application, as long as it has a driving part that can move along the first direction. The structural types of the guide assembly 7 can be of various types, for example, it can include a slide rail and slider guide assembly, or it can include a guide rod and sleeve guide assembly, which is not limited in this embodiment.

[0047] According to the above technical solution, the movement stroke of the mounting seat 1a can be automatically and accurately controlled through the servo drive device 6, and the movement of the mounting seat 1a has good repeatability consistency, which can ensure that the tightening sleeve 311 is repeatedly and stably inserted into multiple groups of end face bolts; at the same time, the guide assembly 7 is set to provide precise guidance for the movement of the mounting seat 1a along the first direction, preventing the movement of the mounting seat 1a from deviating from the designed trajectory, thereby improving the stability and reliability of the operation of the bolt tightening device 100.

[0048] It is understandable that the overall weight of the rotating structure 2 and the tightening assembly 3 is relatively heavy. When the mounting seat 1a drives the entire structure to move toward the main shaft of the transmission chain, the center of gravity of the bolt tightening device 100 will also move toward the main shaft of the transmission chain. In order to prevent the center of gravity from shifting too much and causing the device to tip over, in some embodiments, the bolt tightening device 100 also includes a counterweight structure 8; the base frame 1 has two mounting ends opposite to each other along the first direction, and the mounting seat 1a and the counterweight structure 8 are respectively arranged corresponding to the two mounting ends. By arranging the counterweight structure 8 and the mounting seat 1a at the two mounting ends, the center of gravity can be balanced, and it can be ensured that the overall center of gravity of the device will not shift significantly with the movement of the mounting seat 1a.

[0049] In some embodiments, two lifting bolts 9 are formed on the base frame 1 and are arranged in a counter-positioned manner along the second direction. The two lifting bolts 9 are respectively used to connect to the outer threaded holes on the main shaft of the wind turbine generator set; the second direction and the first direction are two directions perpendicular to each other. It should be noted that since the two lifting bolts 9 are arranged relatively along the second direction, and the second direction and the first direction are perpendicular to each other, after the bolt tightening device 100 is correctly placed in place, the positions of the two lifting bolts 9 can be directly opposite to the outer threaded holes of the main shaft of the transmission chain. Therefore, after the lifting bolts 9 are connected and locked with the outer threaded holes, the relative position of the bolt tightening device 100 and the main shaft of the transmission chain is completely fixed, and the position will not be offset with the movement of the mounting seat 1a, ensuring the repeated alignment accuracy of the tightening sleeve 311 and the end face bolt; not only that, the lifting bolts 9 can also be used as the lifting structure of the bolt tightening device 100, which is convenient for the external lifting mechanism to lift and transport the bolt tightening device 100.

[0050] The space inside the transmission chain main shaft is generally narrow for operators, resulting in a poor working environment for operators. Since the bolt tightening device 100 provided in the above embodiment can already complete the semi-automatic bolt tightening operation, the operator does not need to stay in the inner cavity of the transmission chain main shaft. In view of this, in this embodiment, the mounting seat 1a is arranged in an elongated shape in the first direction, and the rotating structure 2 is arranged on the mounting seat 1a at one end away from the base frame 1. According to the above technical solution, since the mounting seat 1a is arranged in an elongated shape in the first direction, the mounting seat 1a has a longer movement stroke, so that the rotating structure 2 can extend from the outside of the transmission chain main shaft to the bolt tightening operation point in the inner cavity, and the operator can operate the bolt tightening device 100 outside the transmission chain main shaft to perform the operation, thereby improving the working environment of the operator.

[0051] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made under the concept of the present invention using the contents of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A bolt tightening device, characterized in that: include: A base frame (1) on which a mounting seat (1a) movable along a first direction is provided; A rotating structure (2) is rotatably arranged on the mounting seat (1a) along an axis in a first direction, and the rotating structure (2) has two tightening ends (21) radially opposite to each other; and The tightening assembly (3) comprises two tightening sleeves (311), which are respectively arranged at the two tightening ends (21) and are rotatably arranged along an axis in a first direction to tighten the end face bolts of the speed increasing box.

2. The bolt tightening device according to claim 1, characterized in that: The two tightening ends and the two tightening sleeves (311) form a sleeve group correspondingly. The sleeve group is provided in multiple groups and is arranged along the circumference of the rotating structure (2).

3. The bolt tightening device according to claim 1, characterized in that: The rotating structure is provided with a bolt tightening gun (31) corresponding to the tightening end, and the bolt tightening gun (31) comprises the tightening sleeve (311).

4. The bolt tightening device according to claim 3, characterized in that: The tightening sleeve (311) is arranged to float along a first direction.

5. The bolt tightening device according to claim 1, characterized in that: The bolt tightening device comprises a rotation driving device (4), wherein the rotation driving device (4) is arranged on the mounting seat (1a) and is capable of driving the rotating structure (2) to rotate intermittently at equal angles.

6. The bolt tightening device according to claim 1, characterized in that: A visual recognition device (5) is provided on the rotating structure (2) corresponding to the tightening sleeve (311).

7. The bolt tightening device according to claim 1, characterized in that: The bolt tightening device further comprises a servo drive device (6), the servo drive device (6) being arranged on the base frame (1) and having a drive portion movable along a first direction, the drive portion being arranged on the mounting seat (1a); and / or, The bolt tightening device further comprises a guide assembly (7), wherein the guide assembly (7) is arranged between the base frame (1) and the mounting seat (1a) to limit the movement of the mounting seat (1a) in a first direction.

8. The bolt tightening device according to claim 1, characterized in that: The bolt tightening device also includes a counterweight structure (8); The base frame (1) has two mounting ends that are opposite to each other along a first direction, and the mounting seat (1a) and the counterweight structure (8) are respectively arranged corresponding to the two mounting ends.

9. The bolt tightening device according to claim 1, characterized in that: The base frame (1) is formed with two hanging bolts (9) arranged in a counter-positioned manner along the second direction, and the two hanging bolts (9) are respectively used to be connected to the outer threaded holes on the main shaft of the wind turbine generator set; The second direction and the first direction are two directions perpendicular to each other.

10. The bolt tightening device according to claim 1, characterized in that: The mounting seat (1a) is arranged in an elongated shape in a first direction, and the rotating structure (2) is arranged on an end of the mounting seat (1a) away from the base frame (1).

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