Electric tool for multi-axis synchronous diagonal fastening of bolts

Abstract

The invention discloses a multi-axis synchronous diagonal bolt fastening electric tool which comprises an electric wrench, a first sleeve is arranged on the electric wrench, a mounting plate is arranged at the end of the first sleeve, sliding blocks sliding on the mounting plate are symmetrically arranged on the mounting plate, rotating shafts rotating on the sliding blocks are arranged on the sliding blocks, and the rotating shafts are arranged on the rotating shafts. A driving head matched with a bolt head is arranged at the end of the rotating shaft, a torque adjusting mechanism is arranged between the rotating shaft and the driving head, and the rotating shaft is connected with an output shaft of the electric wrench through a connecting mechanism. In the working process, the two driving heads are matched with diagonal bolts correspondingly, then the electric wrench is started, under the action of the connecting mechanism, the rotating shafts on the two sides rotate synchronously, the driving heads on the two sides are driven to rotate, the diagonal bolts are tightened synchronously, and a plurality of bolt sets are tightened synchronously, diagonally and automatically. And by arranging the torque adjusting mechanism, the torque at each driving head can be adjusted, uniform stress is guaranteed, manual operation errors are eliminated, and the assembling quality and efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field, and specifically to an electric tool for multi-axis synchronous diagonal fastening of bolts. Background Art

[0002] Bolt fastening in the power system is an important link to ensure the safe operation of power equipment. When fastening bolts, the requirements for the fastening sequence are as follows: for large equipment or connections with multiple bolts, fastening should be carried out in a certain sequence, usually using the method of symmetric fastening to prevent loosening or deformation of the connection caused by uneven stress.

[0003] Traditional bolt fastening requires step-by-step operation in a diagonal sequence, relying on manual experience, with low efficiency and prone to uneven stress, which is likely to cause extrusion of the flange surface sealing ring, resulting in oil leakage of the transformer.

[0004] Most existing electric tools are single-axis designed, unable to achieve synchronous operation of multiple bolts, lacking real-time torque monitoring and synchronous control, and prone to flange surface skew or sealing failure. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems, provide an electric tool for multi-axis synchronous diagonal fastening of bolts, solve the automation problem of synchronous diagonal fastening of multiple bolt groups, eliminate manual operation errors, and improve the assembly quality and efficiency.

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

[0007] An electric tool for multi-axis synchronous diagonal fastening of bolts, including an electric wrench, a first sleeve is provided on the electric wrench, an installation plate is provided at the end of the first sleeve, sliders that slide on the installation plate are symmetrically provided on the installation plate, a rotating shaft that rotates on the slider is provided on the slider, a driving head that cooperates with the bolt head is provided at the end of the rotating shaft, a torque adjustment mechanism is provided between the rotating shaft and the driving head, and the rotating shaft is connected to the output shaft of the electric wrench through a connection mechanism;

[0008] The torque adjustment mechanism includes a second sleeve provided on the rotating shaft, a connecting rod provided at the end of the second sleeve, the driving head is installed at the end of the connecting rod, a long hole is provided on the outer cylindrical surface of the second sleeve, a first driving rod that cooperates with the long hole is provided at the end of the rotating shaft, a driving groove is provided at the end of the second sleeve, a second driving rod that cooperates with the driving groove is provided on the connecting rod, a compression spring and a nut threadedly connected to the rotating shaft are provided on the rotating shaft, one end of the compression spring contacts the second sleeve, and the other end of the compression spring contacts the nut.

[0009] Furthermore, a through hole is provided at the middle position of the installation plate.

[0010] Further, symmetric sliding grooves are provided on the mounting plate, and the sliders are arranged in the sliding grooves and slide therein.

[0011] Further, locking screws are provided on the sliders for locking the positions of the sliders.

[0012] Further, support plates are provided on the sliders, and the connecting rod is rotatably connected to the support plates through bearings.

[0013] Further, the driving head is sleeved on the end of the connecting rod and connected by a pin shaft.

[0014] Further, a clamping groove for cooperating with the bolt head is provided on the inner wall of the driving head.

[0015] Further, the connecting mechanism includes a first connecting rod, a second connecting rod, a first belt, and a second belt. The first connecting rod and the second connecting rod are hinged, and a rotatable pin shaft is provided at the hinge joint thereof. One end of the first connecting rod away from the second connecting rod is rotatably connected to the output shaft of the electric wrench, and one end of the second connecting rod away from the first connecting rod is rotatably connected to the corresponding rotating shaft. The output shaft of the electric wrench connects the rotating shaft through the first belt and the second belt.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. A first sleeve is provided on the electric wrench of the present invention. An installation plate is provided at the end of the first sleeve. Symmetric sliders that slide on the installation plate are provided on the installation plate. A rotating shaft that rotates on the sliders is provided on the sliders. A driving head that cooperates with the bolt head is provided at the end of the rotating shaft. A torque adjustment mechanism is provided between the rotating shaft and the driving head. The rotating shaft is connected to the output shaft of the electric wrench through a connecting mechanism. During operation, the two driving heads are respectively matched with the diagonal bolts. Then the electric wrench is started. Under the action of the connecting mechanism, the rotating shafts on both sides rotate synchronously, driving the driving heads on both sides to rotate, and tightening the diagonal bolts synchronously, realizing synchronous diagonal automatic tightening of multiple bolt groups. By setting the torque adjustment mechanism, the torque at each driving head can be adjusted to ensure uniform force, eliminate manual operation errors, and improve the assembly quality and efficiency. The sliders move on the installation plate, and the interval between the driving heads can be adjusted to adapt to different bolt positions.

[0018] 2. In the present invention, the torque adjustment mechanism includes a second sleeve disposed on the rotating shaft, a connecting rod disposed at the end of the second sleeve, the driving head is installed at the end of the connecting rod, a long hole is provided on the outer cylindrical surface of the second sleeve, a first driving rod cooperating with the long hole is provided at the end of the rotating shaft, a driving groove is provided at the end of the second sleeve, a second driving rod cooperating with the driving groove is provided on the connecting rod, a compression spring and a nut threadedly connected to the rotating shaft are provided on the rotating shaft, one end of the compression spring contacts the second sleeve, and the other end of the compression spring contacts the nut. When torque adjustment is required, the nut is rotated to adjust the force squeezing the compression spring. The thrust on the second sleeve generated by the deformation of the compression spring changes. The rotating shaft drives the second sleeve to rotate, and under the action of the driving groove and the second driving rod, the driving head rotates synchronously. When the bolt is tightened to the required torque, the driving groove and the second driving rod are separated, thus completing the tightening operation. By rotating the nut, the torque can be adjusted. The first driving rod is arranged through the long hole to prevent the second sleeve and the rotating shaft from being axially locked. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 Structural schematic diagram of the working state of the present invention;

[0021] Figure 2 Internal structure schematic of the present invention Figure 1 ;

[0022] Figure 3 Internal structure schematic of the present invention Figure 2 ;

[0023] Figure 4 Left view of the present invention;

[0024] Figure 5 Front view of the present invention;

[0025] Figure 6 Structural schematic diagram of the torque adjustment mechanism of the present invention.

[0026] In the figure: electric wrench 1, first sleeve 2, mounting plate 3, slider 4, rotating shaft 5, driving head 6, second sleeve 7, connecting rod 8, long hole 9, first driving rod 10, driving groove 11, second driving rod 12, compression spring 13, through hole 14, sliding groove 15, locking screw 16, support plate 17, card slot 18, first connecting rod 19, second connecting rod 20, first belt 21, second belt 22, nut 23. Detailed implementation mode

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] As Figure 1 shown, an electric tool for multi-axis synchronous diagonal tightening of bolts includes an electric wrench 1. A first sleeve 2 is provided on the electric wrench 1. The first sleeve 2 is composed of three arc-shaped plates. The first sleeve 2 is fixed on the electric wrench 1. An installation plate 3 is provided at the end of the first sleeve 2. Symmetrically arranged on the installation plate 3 are sliders 4 that slide on the installation plate 3. A rotating shaft 5 that rotates on the slider 4 is provided on the slider 4. A driving head 6 that cooperates with the bolt head is provided at the end of the rotating shaft 5. A torque adjustment mechanism is provided between the rotating shaft 5 and the driving head 6. The rotating shaft 5 is connected to the output shaft of the electric wrench 1 through a connecting mechanism. During operation, the two driving heads 6 are respectively matched with the diagonal bolts. Then the electric wrench 1 is started. Under the action of the connecting mechanism, the rotating shafts 5 on both sides rotate synchronously, driving the driving heads 6 on both sides to rotate, and tightening the diagonal bolts synchronously, realizing synchronous diagonal automatic tightening of multiple bolt groups. By setting the torque adjustment mechanism, the torque at each driving head 6 can be adjusted to ensure uniform force, eliminate manual operation errors, and improve the assembly quality and efficiency. The slider 4 moves on the installation plate 3, and the interval between the driving heads can be adjusted to adapt to different bolt positions.

[0029] As Figure 2 and Figure 6As shown in the figure, the torque adjustment mechanism includes a second sleeve 7 arranged on the rotating shaft 5, a connecting rod 8 arranged at the end of the second sleeve 7, the driving head 6 is installed at the end of the connecting rod 8, a long hole 9 is provided on the outer cylindrical surface of the second sleeve 7, a first driving rod 10 matching with the long hole 9 is provided at the end of the rotating shaft 5, a driving groove 11 is provided at the end of the second sleeve 7, a second driving rod 12 matching with the driving groove 11 is provided on the connecting rod 8, a compression spring 13 and a nut 23 threadedly connected to the rotating shaft 5 are provided on the rotating shaft 5, one end of the compression spring 13 contacts the second sleeve 7, and the other end of the compression spring 13 contacts the nut 23; when torque needs to be adjusted, the nut 23 is rotated, so as to adjust the force pressing the compression spring 13, the thrust generated by the deformation of the compression spring 13 on the second sleeve 7 changes, the rotating shaft 5 drives the second sleeve 7 to rotate, and under the action of the driving groove 11 and the second driving rod 12, the driving head 6 rotates synchronously. When the bolt is tightened to the required torque, the driving groove 11 and the second driving rod 12 are separated, thus completing the tightening operation. By rotating the nut 23, the torque can be adjusted. The first driving rod 10 is arranged through the long hole 9 to prevent the second sleeve 7 and the rotating shaft 5 from being axially locked.

[0030] As Figure 4 shown, a through hole 14 is provided at the middle position of the mounting plate 3 to facilitate the output shaft of the electric wrench 1 to extend out.

[0031] As Figure 3 shown, sliding grooves 15 are symmetrically provided on the mounting plate 3, the slider 4 is arranged in the sliding grooves 15 and slides in the sliding grooves 15, and the slider 4 can move along the sliding grooves 15 so as to adapt to different bolt positions.

[0032] As Figure 3 shown, a locking screw 16 for locking the position of the slider 4 is provided on the slider 4.

[0033] As Figure 2 and Figure 5 shown, a support plate 17 is provided on the slider 4, and the connecting rod 8 and the support plate 17 are rotatably connected through a bearing.

[0034] As Figure 2 shown, the driving head 6 is sleeved at the end of the connecting rod 8 and connected through a pin shaft.

[0035] As Figure 2 shown, a clamping groove 18 matching with the bolt head is provided on the inner wall of the driving head 6, and the shape of the clamping groove 18 is hexagonal.

[0036] As Figure 4 and Figure 5As shown in the figure, the connecting mechanism includes a first connecting rod 19, a second connecting rod 20, a first belt 21, and a second belt 22. The first connecting rod 19 is hinged to the second connecting rod 20, and a rotatable pin is provided at the hinge of the two. One end of the first connecting rod 19 away from the second connecting rod 20 is rotatably connected to the output shaft of the electric wrench 1. One end of the second connecting rod 20 away from the first connecting rod 19 is rotatably connected to the corresponding rotating shaft 5. The output shaft of the electric wrench 1 is connected to the rotating shaft 5 through the first belt 21 and the second belt 22.

[0037] For the bolts at specific positions, the position of the rotating shaft 5 needs to be adjusted. The rotation of the rotating shaft 5 requires its connection with the output shaft of the electric wrench 1. The rotation of the output shaft of the electric wrench 1 drives the rotating shaft 5, and this can be achieved through the connecting mechanism at this time.

[0038] During use, when the output shaft of the electric wrench 1 rotates, it drives the first belt 21 to move. The first belt 21 drives the second belt 22 to move, and then the rotating shaft 5 rotates accordingly. Among them, two coaxially arranged belt pulleys are fixed on the pin where the first connecting rod 19 and the second connecting rod 20 are hinged. One belt pulley is connected to the output shaft of the electric wrench 1 through the first belt 21, and the other belt pulley is connected to the rotating shaft 5 through the second belt 22.

[0039] During torque control, based on the fuzzy PID synchronous control algorithm, a real-time torque-angle double closed-loop feedback mechanism intelligent path planning module automatically generates the optimal diagonal tightening sequence; it also includes a fault self-diagnosis system, including overload protection, off-load alarm, etc.

[0040] The "diagonal phase synchronization factor" dynamic adjustment strategy is proposed for the first time to ensure that the multi-axis torque deviation ≤ 2%; a dual-mode operating system is developed: ① Automatic mode, with a preset program; ② Teaching mode, for manual demonstration learning; an innovative application of an asymmetric damping mechanism to solve the impact vibration problem during synchronous startup; a flatness monitoring system based on a strain gauge array to compensate for flange deformation in real time.

[0041] Based on the distributed architecture of STM32H7 + FPGA, a dedicated HMI interface is developed, with a touch screen + LED indicator lights; a wireless communication module, supporting 5G industrial Internet of Things access.

[0042] Its working process is as follows: ① Scan the workpiece QR code to obtain tightening parameters; ② Automatically locate the bolt holes; ③ Diagonal tightening in stages: Pre-tightening stage (20% target torque) → Angle calibration → Final tightening stage (100% torque) ④ Generate an electronic torque curve report.

[0043] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "left", "right", "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0044] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An electric tool for multi-axis synchronous diagonal bolt tightening, comprising an electric wrench (1), characterized in that: The electric wrench (1) is provided with a first sleeve (2), a mounting plate (3) is provided at the end of the first sleeve (2), a slider (4) is symmetrically provided on the mounting plate (3) and slides on the mounting plate (3), the slider (4) is provided with a rotating shaft (5) that rotates on the slider (4), a driving head (6) that cooperates with a bolt head is provided at the end of the rotating shaft (5), a torque adjustment mechanism is provided between the rotating shaft (5) and the driving head (6), and the rotating shaft (5) is connected to the output shaft of the electric wrench (1) via a connecting mechanism; The torque adjustment mechanism comprises a second sleeve (7) arranged on the rotating shaft (5), a connecting rod (8) arranged at the end of the second sleeve (7), the driving head (6) is mounted on the end of the connecting rod (8), an elongated hole (9) is arranged on the outer cylindrical surface of the second sleeve (7), a first driving rod (10) matching with the elongated hole (9) is arranged at the end of the rotating shaft (5), a driving groove (11) is arranged at the end of the second sleeve (7), a second driving rod (12) matching with the driving groove (11) is arranged on the connecting rod (8), a compression spring (13) and a nut (23) threadedly connected to the rotating shaft (5) are arranged on the rotating shaft (5), one end of the compression spring (13) contacts with the second sleeve (7), and the other end of the compression spring (13) contacts with the nut (23).

2. A multi-axis synchronous diagonal bolt tightening electric tool as claimed in claim 1, characterized in that: A through hole (14) is provided in the middle of the mounting plate (3).

3. The electric tool for multi-axis synchronous diagonal bolt tightening according to claim 1, characterized in that: The mounting plate (3) is symmetrically provided with sliding grooves (15), and the sliding block (4) is arranged in the sliding grooves (15) and slides in the sliding grooves (15).

4. The electric tool for multi-axis synchronous diagonal bolt tightening as claimed in claim 3, characterized in that: The slider (4) is provided with a locking screw (16) for locking the position of the slider (4).

5. The electric tool for multi-axis synchronous diagonal bolt tightening according to claim 1, characterized in that: The slider (4) is provided with a support plate (17), and the connecting rod (8) is rotatably connected to the support plate (17) via a bearing.

6. The electric tool for multi-axis synchronous diagonal bolt tightening according to claim 1, characterized in that: The driving head (6) is sleeved on the end of the connecting rod (8) and is connected via a pin shaft.

7. The electric tool for multi-axis synchronous diagonal bolt tightening according to claim 1, characterized in that: The inner wall of the driving head (6) is provided with a clamping groove (18) which cooperates with the bolt head.

8. The electric tool for multi-axis synchronous diagonal bolt tightening according to claim 1, characterized in that: The connecting mechanism comprises a No. 1 connecting rod (19), a No. 2 connecting rod (20), a No. 1 belt (21), and a No. 2 belt (22); the No. 1 connecting rod (19) is hinged to the No. 2 connecting rod (20), and a rotatable axle pin is provided at the hinge between the two; the end of the No. 1 connecting rod (19) away from the No. 2 connecting rod (20) is rotatably connected to the output shaft of the electric wrench (1); the end of the No. 2 connecting rod (20) away from the No. 1 connecting rod (19) is rotatably connected to the corresponding rotating shaft (5); the output shaft of the electric wrench (1) is connected to the rotating shaft (5) via the No. 1 belt (21) and the No. 2 belt (22).

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