Electrified bolt fastening tool

Abstract

The utility model provides an electrified bolt fastening tool, and belongs to the technical field of equipment special for installation, maintenance, repair or disassembly of overhead lines or cables. The electrified fastening bolt tool comprises an operating rod, the operating rod comprises an insulating section, one end of the operating rod is provided with a first end structure used for being connected with a socket spanner in a rotation stopping mode, the other end of the operating rod is provided with a second end structure used for being connected with a screwing tool in a rotation stopping mode, and the operating rod is sleeved with a rotatable handle sleeve used for being held by a human hand. Limiting structures used for limiting the axial displacement of the handle sleeve are arranged on the positions, on the two axial sides of the handle sleeve, of the operating rod respectively. During use, a worker holds the handle sleeve to fasten a bolt, and due to the fact that the handle sleeve is matched with the operating rod in a rotating mode, the handle sleeve can be tightly held by the hand, smooth rotation of the operating rod is not affected, stable matching of the socket spanner and a nut is guaranteed, disengagement is avoided, operation is easier, and operation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a live bolt fastening tool, belonging to the technical field of equipment specially used for installation, maintenance, repair or disassembly of overhead lines or cables. Background Art

[0002] The fixing bolts of high-voltage switches and high-voltage insulators on power transmission and distribution lines often loosen due to vibration, wind, and other factors. If loosened, the high-voltage switches or power transmission and distribution lines must be powered off, and the loose bolts must be tightened with a wrench during the power outage. For oil refining, chemical engineering, and oilfield crude oil production, which require continuous operation of electrical equipment, temporary power outages can have a significant impact. Therefore, the common practice in these industries is to set up backup lines. First, the line with the potential danger is connected to the backup line for grid power supply. The line with the potential danger is then shut down for maintenance, with the backup line providing continuous power during the maintenance process. However, power transmission and distribution lines in oilfield crude oil production often lack backup lines, necessitating live work, using live working tools to tighten the bolts.

[0003] For example, the Chinese utility model patent with authorization publication number CN214069383U discloses an insulating operating rod for live working, including a first insulating rod body and a second insulating rod body that are plugged together (the two insulating rod bodies constitute an insulating section, of course, one insulating rod body can also constitute an insulating section, that is, there is only one insulating rod body), the upper end of the second insulating rod body is equipped with a socket, and a connector is movably inserted in the socket, and the connector is used to be connected and fixed with a socket wrench (the socket and connector constitute a first end structure, of course, the connector can also be directly installed at the upper end of the insulating rod body, in which case the connector constitutes the first end structure, or the socket wrench can be directly integrally molded at the upper end of the insulating rod body, in which case the socket wrench constitutes the first end structure); the lower end of the first insulating rod body is equipped with a connector, and the connector is used to be connected to an electric wrench or a manual wrench (i.e., a screwing tool) (the connector constitutes a second end structure, of course, the connector can also be omitted and the lower end of the insulating rod body can be directly rotated manually, in which case the outer peripheral surface of the lower end of the insulating rod body constitutes the second end structure). In addition, the lower end of the first insulating rod body is also equipped with a rubber grip. During use, the first insulating rod is driven to rotate by an electric wrench or a manual wrench, which in turn drives the socket wrench to rotate. The socket wrench is then used to tighten loose bolts, allowing live work to be performed while tightening bolts. If a worker forgets to bring their electric wrench or manual wrench, they can simply rotate the first insulating rod by gripping the rubber grip, causing the insulating rod to drive the socket wrench to rotate.

[0004] However, due to the long length of the insulating operating rod, for easy operation, the worker inevitably needs to hold the insulating rod with one hand and operate the electric wrench or manual wrench or directly rotate the insulating rod with the other hand. The insulating rod is in direct friction contact with the human hand. If the grip is too tight, it is not convenient to rotate the insulating rod. If the grip is too loose, the insulating rod is easy to slide down, causing the socket wrench to separate from the bolt, which is very inconvenient to operate and affects the operating efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a live bolt tightening tool to solve the problem in the prior art that a worker holds an insulating rod with one hand and rotates the insulating rod with the other hand, which results in the insulating rod being difficult to rotate when the grip is too tight, and the insulating rod being easy to slide down when the grip is too loose, causing the socket wrench to separate from the bolt, thereby causing inconvenience in operation and affecting operating efficiency.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A live bolt tightening tool comprises an operating rod, which includes an insulating section. One end of the operating rod is provided with a first end structure for being non-rotatably connected to a socket wrench or directly non-rotatably connected to a nut connected to a loose bolt to tighten the loose bolt. The other end of the operating rod is provided with a second end structure for being non-rotatably connected to a screwing tool to drive the operating rod to rotate or for a person to directly rotate the operating rod by hand. The operating rod is sleeved with a rotatable handle sleeve for being held by a person. The operating rod is provided with limiting structures on both axial sides of the handle sleeve for limiting the axial displacement of the handle sleeve.

[0008] The beneficial effect of the above technical solution is that: the utility model belongs to an improved invention creation, the improvement is that a handle sleeve that can be rotated and held by a human hand is sleeved on the operating rod, and a limiting structure for limiting the axial displacement of the handle sleeve is respectively provided on both axial sides of the handle sleeve on the operating rod, wherein the limiting structure on one side can prevent the handle sleeve from falling out of the operating rod, and the limiting structure on the other side can abut against the handle sleeve, so that the human hand can support the operating rod when holding the handle sleeve and keeping the operating rod upright. When in use, the staff member holds the handle sleeve with one hand, and the other hand directly rotates the operating rod through the second end structure or controls the rotation of the operating rod through a screwing tool, thereby rotating the first end structure to tighten the loose bolt. Since the handle sleeve rotates in coordination with the operating rod, the human hand can hold the handle sleeve tightly without affecting the smooth rotation of the operating rod, and it is easier to ensure that the socket wrench or the first end structure is stably matched with the nut to avoid disengagement, making the operation easier and improving the operating efficiency.

[0009] Furthermore, the limiting structure on at least one side is a limiting sleeve that is sleeved and fixed on the outside of the operating rod.

[0010] Furthermore, a stop edge is provided on the end of the limiting sleeve facing the handle sleeve for engaging with the end surface of the handle sleeve.

[0011] Furthermore, an outwardly extending outward edge is provided at the end of the handle sleeve facing the first end structure.

[0012] Furthermore, a load-bearing bearing capable of withstanding axial force is installed on the operating rod on the side of the handle sleeve facing the first end structure. The load-bearing bearing constitutes a limiting structure on one side. The load-bearing bearing includes a first ring that is interference fit with the operating rod and a second ring that can rotate freely relative to the first ring. The end of the handle sleeve facing the first end structure is used to abut against the second ring of the load-bearing bearing.

[0013] Furthermore, the load-bearing bearing is a shell thrust bearing.

[0014] Furthermore, the first end structure and the second end structure are respectively located at two ends of the insulating section, and the handle sleeve is sleeved on the outside of the middle part of the insulating section.

[0015] Furthermore, the operating rod also includes an operating section fixedly connected to the insulating section. The operating section is a metal rod and constitutes the second end structure. The handle sleeve is sleeved on the outside of the operating section.

[0016] Furthermore, the operating rod also includes a connecting section and an operating section fixedly connected to the two ends of the insulating section respectively. The connecting section and the operating section are both metal rods. The connecting section and the insulating section are plugged in and bonded to each other, or the connecting section and the insulating section are plugged in and fixedly connected by a fastener passing through the two. The operating section and the insulating section are plugged in and fixedly connected by a fastener passing through the two.

[0017] Furthermore, the insulating section is formed by connecting at least two sections of insulating rods, and two adjacent sections of insulating rods are connected by a transition sleeve, which has an inner hole for the two adjacent sections of insulating rods to be inserted respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a front view of Example 1 of the live bolt tightening tool of the utility model;

[0019] Figure 2 This is a three-dimensional diagram of Example 1 of the live bolt tightening tool of the present invention after the load-bearing bearing, the handle sleeve and the limit sleeve are removed;

[0020] Figure 3 This is a front view of Example 2 of the live bolt tightening tool of the utility model;

[0021] Figure 4This is an exploded view of Example 2 of the live bolt tightening tool of the present utility model;

[0022] Figure 5 This is a front view of Example 3 of the live bolt tightening tool of the utility model;

[0023] Figure 6 This is a front view of Example 4 of the live bolt tightening tool of the utility model;

[0024] Figure 7 This is a front view of Example 4 of the live bolt tightening tool of the present invention after the load-bearing bearing, the handle sleeve and the limit sleeve are removed;

[0025] Figure 8 This is a front view of Example 5 of the live bolt tightening tool of the utility model;

[0026] Figure 9 This is a connection diagram of the insulating rod and the connecting section in Example 6 of the live bolt tightening tool of the present invention;

[0027] Figure 10 This is a connection diagram of the insulating rod and the connecting section in Example 7 of the live bolt tightening tool of the present invention.

[0028] In the figure: 1. Connecting section; 11. Connecting sleeve; 12. Square column; 13. Locking bead; 14. Transition body; 2. Insulating rod; 21. First connecting hole; 22. Second connecting hole; 3. Rivet; 4. Operating section; 41. Operating sleeve; 42. Operating body; 43. Locking hole; 44. Operating hole; 45. Fixing hole; 5. Handle sleeve; 51. Outward edge; 6. Limiting sleeve; 61. Stop edge; 7. Load-bearing bearing; 8. Transition sleeve; 81. Through hole. DETAILED DESCRIPTION

[0029] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0030] In response to the technical problems existing in the prior art, the basic technical concept of the utility model is to provide a rotatable handle sleeve for human hand to hold on the operating rod. When in use, the staff holds the handle sleeve with one hand and controls the rotation of the operating rod with the other hand to tighten the bolt. Since the handle sleeve rotates in coordination with the operating rod, the human hand can hold the handle sleeve tightly without affecting the smooth rotation of the operating rod, and it is easy to ensure that the socket wrench or the first end structure is stably matched with the nut to avoid disengagement, making operation easier and improving operating efficiency.

[0031] Example 1 of the electric bolt tightening tool in the present utility model:

[0032] like Figure 1 and Figure 2As shown, the live bolt tightening tool includes an operating rod, which includes an insulating section. In this embodiment, the insulating section is composed of a section of insulating rod 2. The insulating rod 2 is made of a glass fiber and epoxy resin mixture and is cylindrical in shape. One end of the operating rod is provided with a first end structure for connecting with a socket wrench to tighten the loose bolt. In this embodiment, the first end structure is a connecting section 1 fixedly connected to one end of the insulating rod 2. The connecting section 1 is a metal rod and, due to its short length, can also be called a connector. The connecting section 1 includes a connecting sleeve 11 and a square column 12. The connecting sleeve 11 is mounted on the outside of the end of the insulating rod 2, or in other words, the end of the insulating rod 2 is inserted into the connecting sleeve 11 and plugged into the connecting sleeve 11. The connecting sleeve 11 and the insulating rod 2 are fixedly connected by a fastener extending through them. In this embodiment, the fastener is a rivet 3. The connecting sleeve 11 and the end of the insulating rod 2 are each provided with a through hole for the rivet 3 to pass through.

[0033] Connecting sleeve 11 and square post 12 are connected by a tapered transition body 14. Square post 12 is inserted into a socket wrench, a well-established, existing product. When locked with square post 12, loose bolts can be tightened. A locking bead 13 is mounted on square post 12, and a spring is also installed inside square post 12 to press against it. Locking bead 13 is used to lock with the socket wrench.

[0034] The other end of the operating rod is provided with a second end structure for connecting to a screwing tool to rotate the operating rod. In this embodiment, the second end structure is an operating section 4 fixedly connected to the other end of the insulating rod 2. The operating section 4 is a metal rod with a certain length. It includes an operating sleeve 41 and an operating body 42. The outer diameter of the operating sleeve 41 is larger than the outer diameter of the operating body 42. The operating sleeve 41 is sleeved on the outside of the end of the insulating rod 2, or in other words, the end of the insulating rod 2 is inserted into the operating sleeve 41 and plugged into the operating sleeve 41. The operating sleeve 41 and the insulating rod 2 are fixedly connected by a fastener passing through the two. The fastener is also a rivet 3. The operating sleeve 41 and the end of the insulating rod 2 are respectively provided with a through hole for the rivet 3 to pass through.

[0035] The end of the operating body 42 is provided with an operating hole 44. This square hole is used for a rotationally fixed connection with a ratchet wrench (a screwing tool, a mature product). The end of the operating body 42 is also provided with a locking hole 43, which communicates with the operating hole 44 and is used for locking with the ratchet wrench. During use, the square column 12 is rotationally fixed to the socket wrench, which is in turn rotationally fixed to the nut connected to the loosened bolt. The end of the operating body 42 is rotationally fixed to the ratchet wrench. The ratchet wrench can drive the operating section 4 to rotate, which in turn drives the connecting section 1 and the socket wrench to rotate via the insulating rod 2. In other words, the ratchet wrench controls the rotation of the entire operating rod and socket wrench to tighten the loosened bolt. The length of the insulating rod 2 meets the insulation distance requirements, enabling live working.

[0036] like Figure 1 As shown, in order to facilitate the rotation of the entire operating rod, the present invention is provided with a rotatable handle sleeve 5 for human hand grip on the operating rod, and a limiting structure for limiting the axial displacement of the handle sleeve 5 is provided on both axial sides of the handle sleeve 5 on the operating rod, wherein the limiting structure near the second end structure side can prevent the handle sleeve 5 from falling off the operating rod, and the limiting structure near the first end structure side can abut against the handle sleeve 5, so that the human hand can support the operating rod when holding the handle sleeve 5 and keeping the operating rod upright. In this way, the staff member holds the handle sleeve 5 with one hand and controls the rotation of the operating rod with the other hand. Since the handle sleeve 5 rotates in coordination with the operating rod, the human hand can hold the handle sleeve 5 tightly without affecting the smooth rotation of the operating rod, and it is easier to ensure that the socket wrench and the nut are stably matched to avoid disengagement, making operation easier and improving operating efficiency.

[0037] Specifically, in this embodiment, the handle sleeve 5 is mounted on the outside of the operating body 42, with a rotational clearance between the handle sleeve 5 and the operating body 42. The handle sleeve 5 has a diameter of 25-30 mm, which is convenient for operators to grip. The diameter of the insulating rod 2 is approximately 36 mm. A sufficient insulation distance is maintained between the handle sleeve 5 and the connecting section 1, which is suitable for tightening bolts in high-voltage circuits.

[0038] A bearing 7 capable of withstanding axial forces is mounted on the operating body 42, on the side of the handle sleeve 5 facing the connecting section 1. This bearing 7 constitutes the limiting structure on this side. The bearing 7 comprises a first ring that forms an interference fit with the operating body 42 and a second ring that is freely rotatable relative to the first ring. The end of the handle sleeve 5 facing the connecting section 1 is designed to abut against the second ring of the bearing 7. This allows the handle sleeve 5 to remain stationary in contact with the second ring of the bearing 7 when the operating lever is rotated, minimizing friction and ensuring smoother rotation of the operating lever.

[0039] In this embodiment, the load-bearing bearing 7 is a shelled thrust bearing. The aforementioned first race is the shaft race of the shelled thrust bearing, and the second race is the seat race of the shelled thrust bearing. The use of a shelled thrust bearing facilitates installation and can withstand greater axial forces, thereby supporting the weight of the entire operating rod. Furthermore, to increase the contact support area and improve the support stability of the operating rod, the handle sleeve 5 is provided with an outwardly extending, outwardly extending edge 51 at the end facing the connecting section 1.

[0040] A limiting sleeve 6 is sleeved and fixed on the operating body 42 on the side of the handle sleeve 5 facing away from the connecting section 1. The limiting sleeve 6 constitutes the limiting structure on this side. Using a separately fixed limiting sleeve 6 as the limiting structure can facilitate the processing and manufacturing of the tool. Specifically, the limiting sleeve 6 is fixed to the operating body 42 by a rivet 3 that penetrates the limiting sleeve 6 and the operating body 42. The operating body 42 is provided with a fixing hole 45 for installing the rivet 3. In addition, the end of the limiting sleeve 6 facing the handle sleeve 5 is provided with a stop edge 61 for engaging with the end face of the handle sleeve 5. This makes it easier for the limiting sleeve 6 to limit the handle sleeve 5.

[0041] Example 2 of the electric bolt tightening tool in the present utility model:

[0042] like Figure 3 and Figure 4 As shown, the difference from Example 1 is that the insulating section in this embodiment is formed by connecting two insulating rods 2, which are connected by a transition sleeve 8. The transition sleeve 8 has an inner hole for inserting the two insulating rods 2, which are then fixed together by rivets 3. Therefore, each insulating rod 2 is provided with a first connecting hole 21 for the rivet 3 to pass through, and the transition sleeve 8 is provided with a corresponding through-hole 81. The two insulating rods 2 forming the insulating section increase the length of the insulating section and further increase the insulation distance between the handle sleeve 5 and the connecting section 1, making operation safer and suitable for tightening bolts in high-voltage circuits.

[0043] Example 3 of the electric bolt tightening tool in the present utility model:

[0044] like Figure 5 As shown, the difference from Example 1 is that: no load-bearing bearing is provided in this embodiment. At this time, the step surface between the operating sleeve 41 of the operating section 4 and the operating body 42 is used to cooperate with the outward-turned edge 51 of the handle sleeve 5 to support the weight of the entire operating lever when the handle sleeve 5 is held. At this time, the step surface of the operating section 4 constitutes a limiting structure on one side, and when the operating lever is rotated, the outward-turned edge 51 is in friction contact with the step surface of the operating section 4, which will generate a slight rotational resistance, but generally does not affect the operation of tightening the bolt with power.

[0045] Example 4 of the electric bolt tightening tool in the present utility model:

[0046] like Figure 6 and Figure 7 As shown, the difference from Example 1 is that the operating section 4 in this embodiment is shorter and constitutes the operating head, but the structure and connection method with the insulating rod 2 are the same as in Example 1. In addition, the insulating rod 2 in this embodiment is only one section, but it is longer. The handle sleeve 5 is mounted on the outside of the middle part of the insulating rod 2. The diameter of the insulating rod 2 is approximately 32 mm, and the diameter of the handle sleeve 5 is approximately 34 mm, to facilitate the operator's grip. At the same time, limit sleeves 6 are fixedly connected to the insulating rod 2 on both axial sides of the handle sleeve 5. Each limit sleeve 6 has a retaining edge 61. The connection method of each limit sleeve 6 is still rivet connection. Therefore, a second connection hole 22 for installing a rivet is opened at the corresponding position of the insulating rod 2. Of the two limiting sleeves 6, the limiting sleeve 6 close to the operating section 4 is used to prevent the handle sleeve 5 from moving toward the operating section 4. A load-bearing bearing 7 is provided between the limiting sleeve 6 close to the connecting section 1 and the handle sleeve 5. The shaft ring of the load-bearing bearing 7 has an interference fit with the insulating rod 2, and the seat ring is used to press against the outward edge 51 of the handle sleeve 5 to support the weight of the entire operating rod.

[0047] Since the handle sleeve 5 in this embodiment is sleeved on the outside of the middle part of the insulating rod 2, the weight on both sides of the handle sleeve 5 is more balanced, which is conducive to the human hand holding the entire operating rod more stably. However, since the insulation distance from the handle sleeve 5 to the connecting section 1 is reduced, in order to ensure safety, it is best used in bolt tightening operations in low-voltage level lines.

[0048] Example 5 of the electric bolt tightening tool in the present utility model:

[0049] like Figure 8 As shown, the difference from Example 4 is that: no load-bearing bearing is provided in this embodiment. At this time, of the two limiting sleeves 6 on the axial sides of the handle sleeve 5, the limiting sleeve 6 close to the operating section 4 is used to prevent the handle sleeve 5 from moving toward the operating section 4, and the limiting sleeve 6 close to the connecting section 1 is cooperated with the handle sleeve 5 to support the weight of the entire operating rod.

[0050] Example 6 of the electric bolt tightening tool in the present utility model:

[0051] like Figure 9 As shown, the difference from any of the above embodiments is that the connecting section 1 in this embodiment does not include a connecting sleeve, and is connected to the transition body 14 by an insertion rod, which is inserted into the insulating rod 2 (the square column 12, the lock bead 13 and the transition body 14 are exposed to the outside) and is also fixedly connected to the insulating rod 2 by a rivet 3.

[0052] Example 7 of the electric bolt tightening tool in the present utility model:

[0053] like Figure 10 As shown, the difference from any of the above embodiments is that the connecting section 1 in this embodiment does not include a transition body, a connecting sleeve or an insertion rod, but only includes a square column 12 and a locking bead 13 installed on the square column 12 through a spring. At this time, the square column 12 is inserted into the insulating rod 2 (a square slot is provided at the end of the insulating rod 2) and then bonded and fixed to the insulating rod 2. Specifically, the connection can be made by casting an adhesive, epoxy resin, or a low-melting-point metal.

[0054] In other embodiments of the live bolt tightening tool: Different from Example 2, the insulating section is composed of three or more insulating rods connected together, and similarly, two adjacent insulating rods are connected by a transition sleeve, and the transition sleeve has an inner hole for inserting the two adjacent insulating rods respectively.

[0055] In other embodiments of the live bolt tightening tool, when the insulating section is formed by connecting at least two insulating rods, the insulating rods and the transition sleeve can be secured to each other using bolts and nuts instead of rivets. Specifically, the bolts penetrate the transition sleeve and the insulating rods and are then secured to the nuts. In other embodiments, the insulating rods and transition sleeves can also be secured by adhesive bonding, or the transition sleeve can be omitted, with adjacent insulating rods secured directly by adhesive bonding.

[0056] In other embodiments of the live bolt tightening tool: the rivet connection between the insulating rod and the connecting section, the rivet connection between the insulating rod and the operating section, and the rivet connection between the limiting sleeve and the operating section or the insulating rod can all be replaced with bolts and nuts, that is, the bolt passes through the two components and is fixed with the nut.

[0057] In other embodiments of the live bolt tightening tool: the load-bearing bearing can also be an angular contact ball bearing that can withstand axial force. In this case, the inner ring of the angular contact ball bearing is interference fit with the operating rod to form a first ring, and the outer ring of the angular contact ball bearing is used to cooperate with the handle sleeve to form a second ring.

[0058] In other embodiments of the live bolt tightening tool: when the handle sleeve is sleeved on the insulating rod, the insulating rod can be set as a stepped rod, and the insulating rod's own shoulder is used to form a limiting structure, so that the end of the handle sleeve facing the first end structure is pressed against the shoulder of the insulating rod.

[0059] In other embodiments of the live bolt tightening tool: the limiting structure on the operating rod on the side of the handle sleeve facing away from the first end structure can also be a shaft elastic circlip or a cotter pin.

[0060] In other embodiments of the live bolt tightening tool: the end of the handle sleeve facing the first end structure may no longer be provided with an outward-turned edge, the handle sleeve is a cylindrical structure with uniform wall thickness, and the end face of the handle sleeve directly cooperates with the limiting structure.

[0061] In other embodiments of the live bolt tightening tool: the end of the limiting sleeve facing the handle sleeve may no longer be provided with a stop edge, the limiting sleeve is a cylindrical structure with uniform wall thickness, and the end face of the limiting sleeve directly cooperates with the end stop of the handle sleeve.

[0062] In other embodiments of the live bolt tightening tool: the first end structure may not be a separately arranged connecting section, but may be integrally formed with the insulating section. For example, a square column may be directly formed at the end of the insulating section (the square column is the first end structure in this case) to prevent rotation with a socket wrench. Of course, a socket wrench may also be directly formed at the end of the insulating section (the socket wrench is the first end structure in this case) to prevent rotation directly with the nut connected to the loose bolt to tighten the loose bolt.

[0063] In other embodiments of the live bolt tightening tool: the second end structure may not be a separately arranged operating section, but may be integrally formed with the insulating section. For example, an operating square hole and a lock hole may be directly formed at the end of the insulating section (in this case, the operating square hole and the lock hole constitute the second end structure) to prevent rotation with the ratchet wrench; of course, only an operating square hole may be formed as the second end structure, and the operating square hole may be a square hole or a hexagonal hole, which is prevented from rotating with an ordinary wrench; of course, the integrally formed second end structure may also not be an operating square hole, but an operating square column, such as a square column or a hexagonal column, which is prevented from rotating with an ordinary wrench.

[0064] In other embodiments of the live bolt tightening tool: the second end structure is neither a separately arranged operating section nor an integrally formed operating square hole or operating square column, but the second end structure is directly formed by utilizing the outer peripheral surface of the end of the insulating section. At this time, the outer peripheral surface of the end of the insulating section can be connected to a pipe clamp (a screwing tool, an existing mature product) to prevent rotation, and the insulating section is driven to rotate by the pipe clamp. Of course, the outer peripheral surface of the end of the insulating section can also be grasped by hand to directly rotate the operating lever without using a screwing tool.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.

Claims

1. A live bolt tightening tool, comprising an operating rod, the operating rod including an insulating section, one end of the operating rod being provided with a first end structure for being non-rotatably connected to a socket wrench or directly non-rotatably connected to a nut connected to a loose bolt to tighten the loose bolt, and the other end of the operating rod being provided with a second end structure for being non-rotatably connected to a screwing tool to drive the operating rod to rotate or for being directly rotated by hand, characterized in that: The operating rod is sleeved with a rotatable handle sleeve for human hand gripping, and the operating rod is provided with limiting structures for limiting the axial displacement of the handle sleeve on both axial sides of the handle sleeve.

2. The live bolt tightening tool according to claim 1, characterized in that: The limiting structure on at least one side is a limiting sleeve which is sleeved and fixed on the outside of the operating rod.

3. The live bolt tightening tool according to claim 2, characterized in that: The end of the limiting sleeve facing the handle sleeve is provided with a stop edge for engaging with the end surface of the handle sleeve.

4. The live bolt tightening tool according to any one of claims 1 to 3, characterized in that: An outwardly extending outward edge is provided at the end of the handle sleeve facing the first end structure.

5. The live bolt tightening tool according to any one of claims 1 to 3, characterized in that: A load-bearing bearing capable of bearing axial force is installed on the side of the handle sleeve facing the first end structure on the operating rod. The load-bearing bearing constitutes a limiting structure on one side. The load-bearing bearing includes a first ring that is interference fit with the operating rod and a second ring that can rotate freely relative to the first ring. The end of the handle sleeve facing the first end structure is used to abut against the second ring of the load-bearing bearing.

6. The live bolt tightening tool according to claim 5, characterized in that: The load-bearing bearing is a shell thrust bearing.

7. The live bolt tightening tool according to any one of claims 1 to 3, characterized in that: The first end structure and the second end structure are respectively located at two ends of the insulating section, and the handle sleeve is sleeved on the outside of the middle portion of the insulating section.

8. The live bolt tightening tool according to any one of claims 1 to 3, characterized in that: The operating rod also includes an operating section fixedly connected to the insulating section. The operating section is a metal rod and constitutes the second end structure. The handle sleeve is sleeved on the outside of the operating section.

9. The live bolt tightening tool according to any one of claims 1 to 3, characterized in that: The operating rod also includes a connecting section and an operating section fixedly connected to both ends of the insulating section. The connecting section and the operating section are both metal rods. The connecting section and the insulating section are plugged in and bonded together, or the connecting section and the insulating section are plugged in and fixedly connected by a fastener passing through the two. The operating section and the insulating section are plugged in and fixedly connected by a fastener passing through the two.

10. The live bolt tightening tool according to any one of claims 1 to 3, characterized in that: The insulating section is formed by connecting at least two sections of insulating rods. Two adjacent sections of insulating rods are connected by a transition sleeve. The transition sleeve has inner holes for the two adjacent sections of insulating rods to be inserted respectively.

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