CN111515900A - A nut fastening device for power grid maintenance - Google Patents

Abstract

The invention discloses a nut fastening device for power grid maintenance, which comprises a fastening device for fastening a screw and a nut and a fixing structure for placing and fixing the fastening device, wherein the fastening device comprises a fastening rod, a hand-holding sleeve sleeved outside the fastening rod, a rotating rod connected to the lower end of the fastening rod and a fastening sleeve in threaded connection with the lower end of the rotating rod, the bottom end of the fastening sleeve is provided with a fastening clamping groove matched with a screw to be fastened, a containing cavity for containing the fastening rod is arranged inside the hand-holding sleeve, a clamping assembly is correspondingly arranged between the hand-holding sleeve and the fastening rod, the front side wall and the rear side wall of the fastening rod are provided with containing grooves which are vertically arranged, the top end of the rotary rod is hinged with the rotary cross rod, under the conditions of labor waste in the installation process and inconvenient single-hand operation, the fastening device is fixed by the fixing structure, so that the screw fixing structure is suitable for screw installation and fastening under different conditions.

Description

A nut fastening device for power grid maintenance

technical field

The invention relates to the field of electric power construction, in particular to a nut fastening device used for grid maintenance.

Background technique

At present, it is often necessary to remove and install screws during grid maintenance. If it is a small Phillips and slotted screw, you need to use the corresponding Phillips or slotted screwdriver. If it is a hexagonal thread, you need to use a fixed type of wrench or adjustable wrench for disassembly. Generally, in the case of small screws, the staff can use the screw disassembly tool to install the screws with one hand. However, in the face of large screws, the degree of tightening of the connection is often large, and a large force is required. It is too inconvenient to operate with one hand, and it may require two-hand operation. However, when disassembling and assembling screws, it is necessary to ensure that the screw disassembling and assembling tools are in the right direction with the screws. This process requires the staff to hold hands. The two-handed screw tightening process conflicts, which affects the smooth progress of the entire screw disassembly process and brings inconvenience to the staff.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a nut tightening device for power grid maintenance, which can solve the problem that the existing large-scale screws tend to have a relatively large degree of tightening, and a large force is required to complete the disassembly and assembly of the screws. , it is too inconvenient to operate with one hand, and it may require two-hand operation. However, when disassembling and assembling screws, it is necessary to ensure that the screw disassembly and assembly tools are facing the screws. This process requires the staff to hold hands, which conflicts with the process of tightening screws with two-handed operation. , which affects the smooth progress of the entire screw disassembly process and brings inconvenience to the staff.

The object of the present invention can be achieved through the following technical solutions: a nut tightening device for power grid maintenance, comprising a tightening device for tightening screws and nuts and a fixing structure for placing and fixing the tightening device;

The tightening device includes a tightening rod, a hand-grip sleeve sleeved on the outside of the tightening rod, a rotating rod connected to the lower end of the tightening rod, and a tightening sleeve threaded on the lower end of the rotating rod The bottom end of the fastening sleeve is provided with a fastening slot matching the screw to be fastened, the left and right side walls of the fastening rod are provided with vertical limit bars, and the hand grip sleeve The inside of the cylinder is provided with a receiving cavity for receiving the fastening rod, the lower end of the receiving cavity is open, and the two sides of the receiving cavity are provided with limit cavities for receiving the vertical limit bar, so A clamping assembly is correspondingly arranged between the hand-holding sleeve and the tightening rod, the front and rear side walls of the tightening rod are provided with receiving grooves, the receiving grooves are arranged vertically, and the top of the holding groove is hinged with a rotating cross bar;

The fixing structure includes a vertically arranged fixing sleeve, the rotating rod is inserted into the fixing sleeve, a plurality of fixing frames are connected to the outside of the fixing sleeve, and the diameters of the fixing frames are evenly arranged at intervals , the end of the fixed frame is bent downward to form a support arm, the bottom of the support arm is provided with a fixed seat, the fixed seat is provided with a counterweight block, and the bottom of the counterweight block is provided with a vacuum suction cup;

The fixing seat is also connected with a clamping seat, the lower surface of the clamping seat is provided with a fixing clip, the upper end surface of the clamping seat is provided with a connecting rod, and the top of the connecting rod is provided with a permanent magnet block, so the The bottom center of the counterweight is provided with a vertical insertion hole, the top of the vertical insertion hole is provided with a fixed magnetic block, the connecting rod is inserted into the vertical insertion hole, and the permanent magnet block Contact with the fixed magnet block and attract together.

Further, the top of the hand-held sleeve is provided with a special-shaped sleeve, and the special-shaped sleeve is in the shape of a cross.

Further, the clamping assembly includes an annular clamping groove arranged around the body of the tightening rod, the annular clamping groove is located at the lowermost end of the tightening rod, and the annular clamping groove is located at the lowermost end of the tightening rod. An elastic clamping sleeve is arranged inside, and the thickness of the elastic clamping sleeve gradually increases from top to bottom, wherein the thickness of the uppermost end of the elastic clamping sleeve is equal to the depth of the clamping groove.

Further, a support spring is provided between the rotating cross bar and the receiving groove.

Further, a telescopic rod is arranged between the rotating cross rod and the storage slot, one end of the telescopic rod is hinged on the rotating cross rod, and the other end is hinged in the storage groove, and the telescopic rod is hinged at the same time. Pass through the support spring.

Further, the rotating rod is a round rod, the fixing sleeve is a cylinder and its inner diameter is equal to the inner diameter of the rotating rod, the diameter of the tightening rod is larger than the diameter of the rotating rod, and the tightening The diameter of the sleeve is larger than the diameter of the rotating rod.

This embodiment also provides a method for using a nut tightening device for power grid maintenance, including the following steps:

Step 1. According to the type and size of the screw to be tightened, select a tightening sleeve. The tightening slot on the lower end of the tightening sleeve can be placed on the screw to be tightened, and the tightening sleeve is rotated. During the cylinder, the screw to be fastened is driven to rotate through the fastening slot;

Step 2. Use the nut tightening device to turn and fasten the screws to be fastened: According to the size of the screws to be fastened, the difficulty of the next installation process can be judged, which can be divided into two cases. The force is small and can be fastened with one hand. Second, the installation process is laborious, and the one-handed operation is inconvenient, requiring two-handed operation;

In the case of one-handed operation, install the tightening sleeve on the rotating rod, then lift the rotating rod, fasten the tightening sleeve on the screw to be tightened, and insert the upper end of the screw to be tightened into the tightening clip In the groove, insert the fingers of one hand into the gap of the cross-shaped special-shaped sleeve, turn the hand-held sleeve, and drive the rotation rod to rotate, so that the screw to be fastened is rotated and tightened;

In the case that one-handed operation is inconvenient and requires two-handed operation, place the fixing structure near the screw to be fastened, make the fixing sleeve face the screw to be fastened, insert the rotating rod into and pass through the fixing sleeve, and then connect the Fasten the sleeve, fasten the fastening sleeve on the screw to be fastened, and insert the upper end of the screw to be fastened into the fastening slot, and then pull up the hand-grip sleeve to release the hand-grip sleeve from the fastening rod. , the rotating crossbar is stretched under the elastic force of the support spring, the fastening rod and the rotating crossbar form a cross-shaped structure, two hands hold a rotating crossbar respectively, and jointly apply force to rotate, so that the screw to be fastened is turned tightly. solid.

Further, the specific process of the two-hand operation in step 2 is: according to the position of the screw to be fastened, the placement position of the fixing structure is selected, and when the surrounding of the screw to be fastened is flat, smooth and airtight, use the vacuum suction cup to fix the fixing structure. Hold, the weight of the counterweight is matched with the weight of the rest of the components so that the vacuum suction cup is tightly attached to the plane around the screw to be fastened, combined with the supporting force of the support arm in different directions, to provide the fastening device installed on the fixed structure. Stable support; when the surrounding area of the screw to be fastened is flat and smooth but breathable, the weight of the counterweight is used to match the weight of the rest of the components, combined with the supporting force of the support arm in different directions, to provide stable support for the fastening device installed on the fixed structure ; When the surrounding area of the screw to be fastened is not smooth enough, take out the fixing clip, align the connecting rod with the vertical insertion hole and insert it, so that the permanent magnet block and the fixed magnetic block are in contact and sucked together, so as to fix the fixing clip on the On the counterweight, the fixing clips are used to clamp the protrusions around the screws to be fastened, and combined with the supporting force of the support arms in different directions, it provides stable support for the fastening device installed on the fixed structure.

Beneficial effects of the present invention:

1. When the present invention is in use, first, according to the type and size of the screw to be fastened, a suitable size of the fastening sleeve is selected. The fastening slot on the lower end surface of the fastening sleeve can be set on the screw to be fastened. , and when rotating the fastening sleeve, the screw to be fastened is driven to rotate by the fastening slot, and then the difficulty of the next installation process is judged according to the size of the screw to be fastened;

When the installation process is simple and the force is small, it can be tightened with one hand. In the case of operation, install the tightening sleeve on the rotating rod, then lift the rotating rod, and fasten the tightening sleeve on the screw to be tightened. , and insert the upper end of the screw to be fastened into the fastening slot, insert the fingers of one hand into the gap of the cross-shaped special-shaped sleeve, turn the hand to hold the sleeve, and drive the rotation rod to rotate, so that the screw to be fastened is rotated and tightened;

When the installation process is laborious, one-handed operation is inconvenient, and two-handed operation is required, place the fixing structure near the to-be-fastened screw, make the fixing sleeve face the to-be-fastened screw, and insert the rotating rod through the fixing Sleeve, then connect the tightening sleeve, fasten the tightening sleeve on the screw to be tightened, and insert the upper end of the screw to be tightened into the tightening slot, then pull up the grip sleeve, so that the hand grips the sleeve The cylinder is separated from the fastening rod, and the rotating cross rod is stretched under the elastic force of the support spring. The fastening rod and the rotating cross rod form a cross-shaped structure. Turn and tighten the screws to be tightened;

Through the above arrangement, in the present invention, during the one-handed tightening operation, the tightening process is not too complicated compared with the operation of common screw tightening devices such as wrenches of fixed size. At the same time, during the double-handed tightening operation, The fixed structure can release both hands and use both hands to fasten screws, which can be more convenient to apply force compared with the prior art, thus bringing convenience to the screw fastening process;

2. In the present invention, when using both hands to perform the tightening operation, the placement position of the fixing structure is selected according to the position of the screw to be tightened. When the surrounding area of the screw to be tightened is flat, smooth and airtight, the fixing structure is fixed by a vacuum suction cup. Hold, the weight of the counterweight is matched with the weight of the rest of the components so that the vacuum suction cup is tightly attached to the plane around the screw to be fastened, combined with the supporting force of the support arm in different directions, to provide the fastening device installed on the fixed structure. Stable support; when the surrounding area of the screw to be fastened is flat and smooth but breathable, the weight of the counterweight is used to match the weight of the rest of the components, combined with the supporting force of the support arm in different directions, to provide stable support for the fastening device installed on the fixed structure ; When the surrounding area of the screw to be fastened is not smooth enough, take out the fixing clip, align the connecting rod with the vertical insertion hole and insert it, so that the permanent magnet block and the fixed magnetic block are in contact and sucked together, so as to fix the fixing clip on the On the counterweight block, the protrusions around the screws to be fastened are clamped by the fixing clips, and combined with the supporting force of the support arms in different directions, it provides stable support for the fastening device installed on the fixed structure;

Through the above arrangement, the arrangement of the permanent magnet block and the fixed magnet block can make the disassembly and assembly of the fixing clip very convenient, and the process of using the counterweight block for fixing and the process of using the vacuum suction cup for fixing are also very simple and fast, so this embodiment is fixed. The process of fixing the structure is very simple and fast, and the combination of the counterweight, the vacuum suction cup and the fixing clip can make the fixing method of the fixing structure more diversified, so as to realize the fast fixing of the fixing structure under different conditions;

3. By setting the fastening device in the present invention, the screw tightening operation can be performed with one hand under the condition that the installation process is relatively simple, the force is small, and the tightening operation can be performed with one hand, and by setting the fixing structure, the present invention can When the installation process is laborious and one-handed operation is relatively inconvenient, the fixing structure is used to fix the fastening device, and then the fastening device is used for screw fastening operation, so the present invention can be applied to screw installation and fastening in different situations.

Description of drawings

In order to facilitate the understanding of those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

1 is a schematic diagram of the overall structure of a nut fastening device used for power grid maintenance;

FIG. 2 is a schematic diagram of a fixing structure of a nut fastening device for power grid maintenance;

3 is a schematic structural diagram of a fastening device of a nut fastening device used for grid maintenance;

4 is an enlarged structural schematic diagram of a fixing structure of a nut fastening device for power grid maintenance;

FIG. 5 is an enlarged structural schematic diagram of A in FIG. 4 of the present embodiment;

6 is a schematic structural diagram of a hand-held sleeve of a nut tightening device used for power grid maintenance;

7 is a schematic structural diagram of a fastening rod of a nut fastening device used for grid maintenance;

In the picture:

1. Fastening device; 2. Fixed structure; 3. Fastening rod; 4. Holding sleeve; 5. Rotating rod; 6. Fastening sleeve; 7. Fastening slot; 8. Vertical limit bar ;9, storage cavity; 10, limit cavity; 11, clamping assembly; 12, elastic clamping sleeve; 13, storage groove; 14, rotating cross bar; 15, support spring; 16, telescopic rod; 17, fixed Sleeve; 18. Fixing frame; 19. Support arm; 20. Fixing base; 21. Counterweight; 22. Vacuum suction cup; 23. Clamping base; 24. Fixing clip; 25. Connecting rod; 26. Permanent magnet block ; 27, vertical insertion hole; 28, fixed magnet; 29, special-shaped sleeve; 30, clamping slot.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. 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 efforts shall fall within the protection scope of the present invention.

Please refer to Fig. 1-7, a nut tightening device for power grid maintenance, including a tightening device 1 for tightening screws and nuts and a fixing structure 2 for placing and fixing the tightening device 1; The fixing device 1 includes a tightening rod 3, a hand-grip sleeve 4 sleeved on the outside of the tightening rod 3, a rotating rod 5 connected to the lower end of the tightening rod 3, and a tightening sleeve 6 threadedly connected to the lower end of the rotating rod 5. , the bottom end of the tightening sleeve 6 is provided with a tightening slot 7 that is adapted to the screw to be tightened. When in use, the tightening sleeve 6 is placed directly above the screw to be tightened and then pressed down, so that the screw to be tightened is pressed down. The upper part of the tightening screw is embedded in the tightening slot 7, and the tightening sleeve 6 can drive the screw to be tightened to rotate and tighten.

The left and right side walls of the tightening rod 3 are provided with vertical limit bars 8, and the interior of the hand-holding sleeve 4 is provided with a receiving cavity 9 for receiving the tightening rod 3. The lower end of the receiving cavity 9 is open, and the receiving cavity 9 There are limit cavities 10 for accommodating the vertical limit bars 8 on both sides of the device. By setting the vertical limit bars 8 and the limit cavities 10, there will be no relative rotation between the tightening rod 3 and the grip sleeve 4. , so the tightening rod 3 can be rotated by holding the sleeve 4, and the top of the sleeve 4 is provided with a special-shaped sleeve 29, the special-shaped sleeve 29 is cross-shaped, and the fingers of one hand are inserted into the gap of the cross-shaped special-shaped sleeve 29. , rotate the hand-held sleeve 4, and drive the rotating rod 5 to rotate, so that the screw to be tightened is rotated and tightened, so when using the nut tightening device, cover the tightening sleeve 6 on the screw to be tightened, and turn it with one hand. The screws can be tightened by holding the sleeve 4 by hand.

A clamping assembly 11 is correspondingly disposed between the hand-grip sleeve 4 and the tightening rod 3. The clamping assembly 11 includes an annular clamping groove 30 arranged around the body of the tightening rod 3. The annular clamping groove 30 is located in the tightening position. At the lowermost end of the fixing rod 3, an elastic clamping sleeve 12 is arranged in the annular clamping groove 30, and the thickness of the elastic clamping sleeve 12 gradually increases from top to bottom. The depths of the grooves 30 are equal, so that a high clamping force can be maintained when the hand-held sleeve 4 is set on the tightening rod 3, so that the hand-held sleeve 4 is set on the tightening rod 3 and connected as a whole, and there is no external force. Under the action, the hand-held sleeve 4 can be prevented from falling off the fastening rod 3 .

The front and rear side walls of the fastening rod 3 are provided with a receiving groove 13, the receiving groove 13 is arranged vertically, and the top of the receiving groove 13 is hinged with a rotating crossbar 14, which can be opened to make the tightening rod 3 and the rotating crossbar 14 form a cross-shaped In the structure, two hands hold a rotating cross bar 14 respectively, and jointly apply force to rotate, so that the screw to be fastened is rotated and tightened, so that the operation can be convenient to apply force. A support spring 15 is arranged between the rotating cross bar 14 and the receiving groove 13 . By setting the support spring 15 , when the hand-held sleeve 4 is released from the fastening rod 3 , the rotating cross bar 14 will be under the elastic force of the support spring 15 . It is automatically opened, which is convenient for operation. At the same time, a telescopic rod 16 is arranged between the rotating cross bar 14 and the storage groove 13. One end of the telescopic rod 16 is hinged on the rotating cross rod 14, and the other end is hinged in the receiving groove 13. The telescopic rod 16 passes through it. In the support spring 15, the telescopic rod 16 can be provided to guide the expansion and contraction of the support spring 15, so as to provide the support force in the correct direction for the support of the rotating cross rod 14, and the telescopic rod 16 is set as a telescopic structure, no matter The opening angle of the rotating cross-bar 14 is within the range of 0 degrees to 90 degrees, which can provide guidance for the support spring 15. When the opening angle of the rotating cross-bar 14 is 90 degrees, the telescopic rod 16 is stretched to the maximum length. When the opening angle is 0 degrees, the telescopic rod 16 is compressed to the minimum length.

In the present embodiment, the telescopic rod 16 adopts the common telescopic rod principle in the market, so it is not repeated here. It can be used in this device after being miniaturized.

At the same time, the arrangement of the clamping assembly 11 and the support spring 15 in this embodiment can make the tightening rod 3 and the rotating cross rod 14 quickly form a cross-shaped structure, which is convenient for subsequent screw tightening.

In this embodiment, the fixing structure 2 includes a vertically arranged fixing sleeve 17 , the rotating rod 5 is passed through the fixing sleeve 17 , and a plurality of fixing frames 18 are connected to the outside of the fixing sleeve 17 , and the plurality of fixing frames 18 are evenly spaced apart. It can provide support forces in different directions for the fixing sleeve 17, thereby stabilizing the structure. The end of the fixing frame 18 is bent downward to form a supporting arm 19. The bottom of the supporting arm 19 is provided with a fixing seat 20, and the fixing seat 20 is provided with a The counterweight 21, the bottom of the counterweight 21 is provided with a vacuum suction cup 22, the fixing base 20 is also connected with a clamping base 23, the lower surface of the clamping base 23 is installed with a fixing clip 24, and the upper end surface of the clamping base 23 is provided with a The connecting rod 25, the top of the connecting rod 25 is provided with a permanent magnet block 26, the bottom center of the counterweight block 21 is provided with a vertical insertion hole 27, and the top of the vertical insertion hole 27 is provided with a fixed magnetic block 28, the connecting rod 25 is inserted into the vertical insertion hole 27, and the permanent magnet block 26 is in contact with the fixed magnet block 28 and sucked together.

In this embodiment, the placement position of the fixing structure 2 is selected according to the position of the screw to be fastened. When the surrounding area of the screw to be fastened is flat, smooth and airtight, the vacuum suction cup 22 is used to fix the fixing structure 2, and the counterweight The weight of the block 21 matches the weight of the rest of the components so that the vacuum suction cup 22 is tightly pressed on the plane around the screw to be fastened, and combined with the supporting force of the support arm 19 in different directions, it is the fastening device 1 installed on the fixed structure 2. Provide stable support; when the surrounding of the screw to be fastened is flat and smooth but breathable, the weight of the counterweight 21 is used to match the weight of the rest of the components, combined with the supporting force of the support arm 19 in different directions, for the fastening installed on the fixed structure 2 The device 1 provides stable support; when the surrounding area of the screw to be fastened is not flat and smooth enough, take out the fixing clip 24, align the connecting rod 25 with the vertical insertion hole 27 and insert it, so that the permanent magnet block 26 is in contact with the fixed magnet block 28 and sucks. Together, the fixing clips 24 are fixed on the counterweight block 21, and the protrusions around the screws to be fastened are clamped by the fixing clips 24, combined with the supporting force of the support arms 19 in different directions, in order to be installed on the fixed structure 2 The fastening device 1 on the top provides stable support.

In the above description, the arrangement of the permanent magnet block 26 and the fixed magnet block 28 can make the disassembly and assembly of the fixing clip 24 very convenient, and the process of using the counterweight block 21 for fixing and the process of using the vacuum suction cup 22 for fixing are also very simple and fast. Therefore, the fixing process of the fixing structure 2 in this embodiment is very simple and fast, and the combination of the counterweight 21, the vacuum suction cup 22 and the fixing clip 24 can make the fixing method of the fixing structure 2 more diverse, so as to realize the Fast fixation under different conditions.

In this embodiment, the rotating rod 5 is a round rod, the fixing sleeve 17 is a cylinder and its inner diameter is equal to that of the rotating rod 5 , the diameter of the tightening rod 3 is larger than that of the rotating rod 5 , and the diameter of the tightening sleeve 6 is larger than that of the rotating rod 5 . larger than the diameter of the rotating rod 5 .

When using this nut tightening device for power grid maintenance, the steps are as follows:

Step 1. According to the type and size of the screw to be fastened, select a suitable size of the fastening sleeve 6, the fastening groove 7 on the lower end surface of the fastening sleeve 6 can be set on the screw to be fastened, and When the tightening sleeve 6 is rotated, the screw to be tightened is driven to rotate through the tightening slot 7;

Step 2. Use the nut tightening device to turn and fasten the screws to be fastened: According to the size of the screws to be fastened, the difficulty of the next installation process can be judged, which can be divided into two cases. The force is small and can be fastened with one hand. Second, the installation process is laborious, and the one-handed operation is inconvenient, requiring two-handed operation;

Under the condition that can be operated with one hand, install the tightening sleeve 6 on the rotating rod 5, then lift the rotating rod 5, fasten the tightening sleeve 6 on the screw to be tightened, and make the upper end of the screw to be tightened. Embed into the fastening slot 7, insert the fingers of one hand into the gap of the cross-shaped special-shaped sleeve 29, turn the hand-held sleeve 4, and drive the rotation rod 5 to rotate, so that the screw to be fastened is rotated and tightened;

When one-handed operation is inconvenient and requires two-handed operation, place the fixing structure 2 near the screw to be tightened, make the fixing sleeve 17 face the screw to be tightened, and insert the rotating rod 5 through the fixing sleeve 17 , then connect the tightening sleeve 6, buckle the tightening sleeve 6 on the screw to be tightened, and insert the upper end of the screw to be tightened into the tightening slot 7, and then pull up the handle sleeve 4, so that the hand The gripping sleeve 4 is separated from the fastening rod 3, the rotating cross rod 14 is stretched under the elastic force of the support spring 15, the fastening rod 3 and the rotating cross rod 14 form a cross-shaped structure, and two hands respectively hold a rotating cross rod 14. Apply force to rotate together, so that the screws to be fastened are rotated and tightened.

In step 2 of this embodiment, the specific process of the two-hand operation is: according to the position of the screw to be fastened, select the placement position of the fixing structure 2, and when the surrounding of the screw to be fastened is flat, smooth and airtight, use the vacuum suction cup 22 Fix the fixing structure 2. The weight of the counterweight 21 matches the weight of the rest of the components so that the vacuum suction cup 22 is tightly pressed on the plane around the screw to be fastened. The fastening device 1 on the fixed structure 2 provides stable support; when the surrounding area of the screw to be fastened is flat and smooth but air-permeable, the weight of the counterweight 21 is used to match the weight of the remaining components, combined with the supporting force of the support arm 19 in different directions, Provide stable support for the fastening device 1 installed on the fixed structure 2; when the surrounding of the screw to be fastened is not flat and smooth, take out the fixing clip 24, align the connecting rod 25 with the vertical insertion hole 27 and insert it, so that the permanent magnet The block 26 is in contact with the fixed magnetic block 28 and is sucked together, thereby fixing the fixing clip 24 on the counterweight block 21, using the fixing clip 24 to clamp the protrusions around the screws to be fastened, and combining the support arms 19 in different directions The supporting force provides stable support for the fastening device 1 installed on the fixed structure 2.

Through the above arrangement, in the present invention, during the one-handed tightening operation, the tightening process is not too complicated compared with the operation of common screw tightening devices such as wrenches of fixed size. At the same time, during the double-handed tightening operation, The fixing structure 2 can release both hands and use both hands to fasten screws, which can be more convenient to apply force compared with the prior art, thereby bringing convenience to the screw fastening process.

The above-disclosed preferred embodiments of the present invention are provided only to help illustrate the present invention. The preferred embodiments do not exhaust all the details, nor do they limit the invention to only such specific embodiments. Obviously, many modifications and variations are possible in light of the content of this specification. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is to be limited only by the claims and their full scope and equivalents.

Claims (8)

1. A nut fastening device for power grid maintenance, characterized in that it comprises a fastening device (1) for fastening screws and nuts and a fixing structure (1) for placing and fixing the fastening device (1). 2); The tightening device (1) comprises a tightening rod (3), a hand-grip sleeve (4) sleeved on the outside of the tightening rod (3), and a rotation connected to the lower end of the tightening rod (3) A rod (5) and a tightening sleeve (6) threadedly connected to the lower end of the rotating rod (5), the bottom end of the tightening sleeve (6) is provided with a tightening sleeve (6) adapted to the screw to be tightened. A fixing slot (7), vertical limit bars (8) are arranged on the left and right side walls of the tightening rod (3), and the inside of the grip sleeve (4) is provided with a space for receiving the tightening The receiving hole (9) of the rod (3), the lower end of the receiving hole (9) is open, and the two sides of the receiving hole (9) are provided with limiters for receiving the vertical limiting strip (8). A position cavity (10), a clamping assembly (11) is correspondingly provided between the hand-holding sleeve (4) and the tightening rod (3), and the front and rear side walls of the tightening rod (3) are provided with a receiving groove (13), the receiving groove (13) is arranged vertically, and the top of the receiving groove (13) is hinged with a rotating cross bar (14); The fixing structure (2) comprises a vertically arranged fixing sleeve (17), the rotating rod (5) is penetrated in the fixing sleeve (17), and the external connection of the fixing sleeve (17) There are a plurality of fixing frames (18), the plurality of said fixing frames (18) are evenly spaced apart, and the end of the fixing frame (18) is bent downward to form a supporting arm (19), and the A fixing seat (20) is arranged at the bottom, a counterweight (21) is arranged on the fixing seat (20), and a vacuum suction cup (22) is arranged at the bottom of the counterweight (21); The fixing seat (20) is further connected with a clamping seat (23), the lower surface of the clamping seat (23) is provided with a fixing clip (24), and the upper end surface of the clamping seat (23) is provided with a connection A rod (25), a permanent magnet block (26) is provided on the top of the connecting rod (25), and a vertical insertion hole (27) is provided at the bottom center of the counterweight block (21). The top of the insertion hole (27) is provided with a fixed magnetic block (28), the connecting rod (25) is inserted into the vertical insertion hole (27), and the permanent magnetic block (26) is connected to the fixed magnetic block (26). The blocks (28) touch and snap together. 2. A nut fastening device for power grid maintenance according to claim 1, characterized in that, a special-shaped sleeve (29) is provided on the top of the hand-held sleeve (4), and the special-shaped sleeve (29) In the shape of a cross. 3. A nut tightening device for power grid maintenance according to claim 2, characterized in that the clamping assembly (11) comprises a ring clamp arranged around the body of the tightening rod (3) A tightening groove (30), the annular clamping groove (30) is located at the lowermost end of the tightening rod (3), and an elastic clamping sleeve (12) is arranged in the annular clamping groove (30), The thickness of the elastic clamping sleeve (12) increases gradually from top to bottom, wherein the thickness of the uppermost end of the elastic clamping sleeve (12) is equal to the depth of the clamping groove (30). 4. A nut fastening device for power grid maintenance according to claim 3, characterized in that a support spring (15) is provided between the rotating crossbar (14) and the receiving groove (13) . 5 . The nut fastening device for power grid maintenance according to claim 4 , wherein a telescopic rod ( 16 ) is arranged between the rotating cross bar ( 14 ) and the receiving groove ( 13 ). 6 . One end of the telescopic rod (16) is hinged on the rotating cross rod (14), the other end is hinged in the receiving groove (13), and the telescopic rod (16) is passed through the support spring ( 15) within. 6. A nut tightening device for power grid maintenance according to claim 5, characterized in that the rotating rod (5) is a round rod, and the fixing sleeve (17) is a cylinder and its inner diameter is the same as that of a cylinder. The inner diameter of the rotating rod (5) is equal, the diameter of the tightening rod (3) is larger than the diameter of the rotating rod (5), and the diameter of the tightening sleeve (6) is greater than that of the rotating rod (5). )diameter of. 7. A nut tightening device for power grid maintenance as claimed in claim 6, wherein the using method of the nut tightening device comprises the following steps: Step 1. According to the type and size of the screw to be tightened, select a tightening sleeve (6), the tightening slot (7) on the lower end surface of the tightening sleeve (6) can be set on the screw to be tightened. , and when the tightening sleeve (6) is rotated, the screw to be tightened is driven to rotate through the tightening slot (7); Step 2. Use the nut tightening device to turn and fasten the screws to be fastened: According to the size of the screws to be fastened, the difficulty of the next installation process can be judged, which can be divided into two cases. The force is small and can be fastened with one hand. Second, the installation process is laborious, and the one-handed operation is inconvenient, requiring two-handed operation; In the case of one-handed operation, install the tightening sleeve (6) on the rotating rod (5), then lift the rotating rod (5), and fasten the tightening sleeve (6) on the screw to be tightened, Insert the upper end of the screw to be fastened into the fastening slot (7), insert the fingers of one hand into the gap of the cross-shaped special-shaped sleeve (29), turn the hand-held sleeve (4), and drive the rotation rod (5) to rotate , so that the screws to be fastened are turned and tightened; In the case that one-handed operation is inconvenient and requires two-handed operation, place the fixing structure (2) near the screw to be fastened, make the fixing sleeve (17) face the screw to be fastened, and insert the rotating rod (5) into the screw to be fastened. Pass through the fixing sleeve (17), then connect the tightening sleeve (6), fasten the tightening sleeve (6) on the screw to be tightened, and insert the upper end of the screw to be tightened into the tightening slot (7) ), and then pull up the handle sleeve (4), so that the handle sleeve (4) is separated from the fastening rod (3), and the rotating cross rod (14) is stretched under the elastic force of the support spring (15), The fastening rod (3) and the rotating cross rod (14) form a cross-shaped structure, and two hands respectively hold a rotating cross rod (14) and jointly apply force to rotate, so that the screws to be fastened are rotated and fastened. 8. a kind of nut tightening device for power grid maintenance according to claim 7, is characterized in that, the concrete process of two-hand operation in step 2 is: Select the placement position of the fixing structure (2) according to the position of the screw to be fastened. When the surrounding area of the screw to be fastened is flat, smooth and airtight, use the vacuum suction cup (22) to fix the fixing structure (2), and the counterweight The weight of the block (21) matches the weight of the rest of the components so that the vacuum suction cup (22) is tightly pressed on the plane around the screw to be fastened. 2) The fastening device (1) on the above provides stable support; when the surrounding area of the screw to be fastened is flat and smooth but breathable, use the weight of the counterweight (21) to match the weight of the rest of the components, combined with the support arms (19) in different directions to provide stable support for the fastening device (1) installed on the fixed structure (2); when the surrounding area of the screw to be fastened is not smooth enough, take out the fixing clip (24) and align the connecting rod (25) Insert the hole (27) vertically and insert it, so that the permanent magnet block (26) and the fixed magnetic block (28) are in contact and sucked together, so that the fixing clip (24) is fixed on the counterweight block (21), using The fixing clips (24) clamp the protrusions around the screws to be fastened, and combined with the supporting forces of the support arms (19) in different directions, provide stable support for the fastening device (1) installed on the fixing structure (2).

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