Electrified insulation tool for electric wrench

Abstract

The invention relates to the technical field of live working tools, and discloses an electric wrench live insulating tool which comprises a working head, an interlayer piece and a connector which are coaxially connected in sequence. The first end of the interlayer piece is provided with a plurality of first grooves which are symmetrically arranged with respect to the middle axis, the second end of the interlayer piece is provided with a plurality of second grooves which are symmetrically arranged with respect to the middle axis, the first grooves and the second grooves are the same in shape, and the first grooves and the second grooves are evenly arranged at intervals in the circumferential direction of the interlayer piece; the first end of the working head is provided with a plurality of first protruding blocks which are symmetrically arranged with the middle axis as the axis, and the first protruding blocks are connected with the first grooves in an embedded mode respectively. The first end of the connector is provided with a plurality of second protruding blocks which are symmetrically arranged with the middle axis as the axis, the second protruding blocks are connected with the second grooves in an embedded mode, and the second end of the connector is used for being connected with an electric wrench. According to the invention, the condition of tangential stress concentration can be effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of live working tools, in particular to an electric wrench live insulating tool. Background Art

[0002] With the advancement of power grid maintenance technology, the market size of China's live-line working industry continues to grow. Demand for live-line working tools has increased significantly, particularly in smart grid upgrades and new energy projects. When performing low-voltage live-line work, live-line insulated tools are typically used to ensure safety, and electric wrenches are connected to these live-line insulated tools for operation.

[0003] The current live insulating tools have a weak ability to resist tangential stress. Therefore, when the live insulating tools are used to tighten bolts, they are subjected to a large rotational torque, which easily causes tangential stress concentration. Summary of the Invention

[0004] The purpose of the present invention is to provide an electric wrench live insulating tool, which can effectively avoid the situation of tangential stress concentration.

[0005] In order to achieve the above object, the present invention provides an electric wrench live insulating tool, comprising: a working head, an interlayer member and a connecting head coaxially connected in sequence;

[0006] A plurality of first grooves symmetrically arranged about the central axis are formed at the first end of the sandwich member, and a plurality of second grooves symmetrically arranged about the central axis are formed at the second end of the sandwich member, wherein the first grooves and the second grooves have the same shape, and the plurality of first grooves and the plurality of second grooves are evenly spaced along the circumference of the sandwich member;

[0007] The first end of the working head is provided with a plurality of first protrusions symmetrically arranged about the central axis, and the plurality of first protrusions are respectively engaged with the plurality of first grooves;

[0008] The first end of the connector is provided with a plurality of second protrusions symmetrically arranged about the central axis, the plurality of second protrusions are respectively engaged with the plurality of second grooves, and the second end of the connector is used for connecting an electric wrench.

[0009] Preferably, the sandwich component is made of carbon fiber reinforced composite material.

[0010] Preferably, the groove walls of the first groove and the second groove on both sides of the circumference of the sandwich component are side groove walls, and a first arc column is provided on the side groove wall. The plane of the side portion of the first arc column is in contact with the wall surface of the side groove wall, and the axial direction of the first arc column is parallel to the axial direction of the sandwich component.

[0011] Preferably, the first arc-shaped columns on the side groove walls of the adjacent first groove and the second groove together form a cylinder.

[0012] Preferably, the side groove wall is parallel to the radial direction of the sandwich element.

[0013] Preferably, the groove walls of the first groove and the second groove close to the central axis of the sandwich component are top groove walls, and a second arc column is provided on the top groove wall. The plane of the side of the second arc column is in contact with the wall surface of the top groove wall, and the axial direction of the second arc column is parallel to the axial direction of the sandwich component.

[0014] Preferably, the groove wall of the first groove away from the central axis of the sandwich member extends to the outer side surface of the sandwich member, the groove wall of the second groove away from the central axis of the sandwich member extends to the outer side surface of the sandwich member, the outer side wall of the first protrusion and the outer side wall of the working head are aligned along the axial direction of the sandwich member, and the outer side wall of the second protrusion and the outer side wall of the connecting head are aligned along the axial direction of the sandwich member.

[0015] Preferably, it also includes:

[0016] An insulating sleeve is sleeved on the outside of the working head, the sandwich member and the connecting head.

[0017] Preferably, the second end of the connector is a polygonal column.

[0018] Preferably, the second end of the working head is a bit screw or a sleeve screw.

[0019] Compared with the prior art, the electric wrench live insulating tool of the embodiment of the present invention has the following advantages:

[0020] The multiple first protrusions on the first end of the working head are embedded in the multiple first grooves on the first end of the interlayer component, and the multiple second protrusions on the first end of the connecting head are embedded in the multiple second grooves on the second end of the interlayer component, so that the coaxial working head, interlayer component and connecting head are connected in sequence.

[0021] During operation, the second end of the connector is connected to the electric wrench, and the second end of the working head is applied to the bolt. When the electric wrench is operated to rotate the live insulating tool of the present application to tighten the bolt, since the multiple first grooves and the multiple second grooves on the sandwich member are symmetrically arranged about the central axis of the sandwich member, the multiple first grooves and the multiple second grooves are evenly spaced along the circumference of the sandwich member, and the first grooves and the second grooves have the same shape, the working head and the connector are connected through the sandwich member. When the live insulating tool is subjected to rotational torque, the stress it is subjected to is positive, effectively avoiding the generation of tangential stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an exploded view of the electric wrench live insulating tool according to an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the live insulating electric wrench tool according to an embodiment of the present invention from another perspective;

[0024] Figure 3 This is an assembly structure diagram of the electric wrench live insulating tool according to an embodiment of the present invention;

[0025] Figure 4 is a schematic structural diagram of a sandwich member according to an embodiment of the present invention;

[0026] Figure 5 is a schematic structural diagram of the sandwich member according to an embodiment of the present invention from another perspective;

[0027] In the figure, 1. working head; 2. interlayer member; 21. first groove; 22. second groove; 23. side groove wall; 24. top groove wall; 25. first arc column; 26. second arc column; 3. connecting head; 4. first protrusion; 5. second protrusion; 6. insulating sleeve. DETAILED DESCRIPTION

[0028] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention in specific contexts.

[0030] In the description of the present invention, it should be understood that the terms "first", "second" and "third" used in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "transverse", "longitudinal", "X-axis direction", "Y-axis direction", "Z-axis direction" and the like is based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore cannot be understood as limiting the present invention. Moreover, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0031] like Figure 1-3 As shown, an electric wrench live insulating tool according to an embodiment of the present invention comprises: a working head 1, an interlayer member 2 and a connecting head 3 coaxially connected in sequence;

[0032] A plurality of first grooves 21 are formed at the first end of the sandwich member 2 and are symmetrically arranged about the central axis. A plurality of second grooves 22 are formed at the second end of the sandwich member 2 and are symmetrically arranged about the central axis. The first grooves 21 and the second grooves 22 have the same shape. The plurality of first grooves 21 and the plurality of second grooves 22 are evenly spaced along the circumference of the sandwich member 2.

[0033] The first end of the working head 1 is provided with a plurality of first protrusions 4 symmetrically arranged about the central axis, and the plurality of first protrusions 4 are respectively engaged with the plurality of first grooves 21;

[0034] The first end of the connector 3 is provided with a plurality of second protrusions 5 symmetrically arranged about the central axis. The plurality of second protrusions 5 are respectively engaged with the plurality of second grooves 22 . The second end of the connector 3 is used to connect to an electric wrench.

[0035] It should be noted that the multiple first protrusions 4 on the first end of the working head 1 are embedded in the multiple first grooves 21 on the first end of the interlayer part 2, and the multiple second protrusions 5 on the first end of the connecting head 3 are embedded in the multiple second grooves 22 on the second end of the interlayer part 2, so that the coaxial working head 1, interlayer part 2 and connecting head 3 are connected in sequence.

[0036] During operation, the second end of the connector 3 is connected to the electric wrench, and the second end of the working head 1 is applied to the bolt. When the electric wrench is operated to rotate the live insulating tool of the present application to tighten the bolt, since the multiple first grooves 21 and the multiple second grooves 22 on the sandwich member 2 are symmetrically arranged about the central axis of the sandwich member 2, the multiple first grooves 21 and the multiple second grooves 22 are evenly spaced along the circumference of the sandwich member 2, and the first grooves 21 and the second grooves 22 have the same shape, the working head 1 and the connector 3 are connected through the sandwich member 2. When the live insulating tool is subjected to rotational torque, the stress it is subjected to is positive, effectively avoiding the generation of tangential stress concentration.

[0037] The working head 1 and the connecting head 3 are made of metal materials, and the sandwich member 2 is made of insulating material.

[0038] like Figure 1 As shown, in this embodiment, further, the sandwich component 2 is made of carbon fiber reinforced composite material.

[0039] It should be noted that the sandwich component 2 is made of carbon fiber reinforced composite material. Since the axial tensile strength of the fibers in the carbon fiber reinforced composite material is much higher than the shear strength, the normal stress causes the load to be completely borne by the fibers, preventing the matrix from being subjected to tangential stress, and effectively avoiding the situation where tangential stress concentration occurs in live insulating tools.

[0040] The tensile strength of the electric wrench live insulating tool in this application is greater than 500MPa, meeting the comprehensive requirements of tool safety, durability and operating efficiency in high-voltage live working scenarios.

[0041] like Figure 1-5 As shown, in this embodiment, further, the groove walls of the first groove 21 and the second groove 22 on both sides of the circumference of the sandwich member 2 are side groove walls 23, and a first arc column 25 is provided on the side groove wall 23. The plane of the side of the first arc column 25 is in contact with the wall surface of the side groove wall 23, and the axial direction of the first arc column 25 is parallel to the axial direction of the sandwich member 2.

[0042] It should be noted that if Figure 3 As shown, the sandwich member 2 serves as a transition piece between the connecting head 3 and the working head 1. The side groove walls 23 of the first groove 21 and the second groove 22 of the sandwich member 2 are provided with first arc columns 25. The arc transition can smooth the sudden change of the geometric shape, avoid the sudden change and concentration of the stress streamline, and thus reduce the increase of local stress. Figure 1-2 As shown, the edge shapes of the first protrusion 4 on the working head 1 and the second protrusion 5 on the connecting head 3 have corresponding arc shapes, so that the working head 1, the sandwich component 2 and the connecting head 3 can be connected in a fitting manner.

[0043] like Figure 4-5As shown, in this embodiment, further, the first arc-shaped columns 25 on the side groove walls 23 of the adjacent first groove 21 and second groove 22 together form a cylinder.

[0044] It should be noted that the first arc-shaped columns 25 on the side groove walls 23 of the adjacent first grooves 21 and second grooves 22 together form a cylinder. Figure 4-5 As shown, two first grooves 21 are provided at the first end of the sandwich member 2, and two second grooves 22 are provided at the second end of the sandwich member 2, so that after the first arc columns 25 on the side groove walls 23 of each adjacent first groove 21 and second groove 22 form a cylinder, there are cylindrical structures in all four directions of the cross section of the sandwich member 2.

[0045] like Figure 3 As shown, the sandwich component 2 is connected to the working head 1 and the connecting head 3. When the live insulating tool is working, the stress in all directions of the sandwich component 2 is contracted to one point, and the internal stress is redistributed. This redistribution causes the tangential stress to gradually transform into axial tensile stress. This transformation helps to reduce stress concentration and avoid premature damage in local areas.

[0046] The carbon fiber reinforced composite material used in sandwich component 2 is composed of high-strength carbon fibers and a matrix material. The fibers' primary function is to withstand axial tensile stress. When tangential stress is converted into axial tensile stress, the fibers are able to more effectively absorb this stress, thereby increasing the overall strength of the material.

[0047] The matrix material plays a role in transmitting and dispersing stress in composite materials. When tangential stress is converted into axial tensile stress, the matrix can better transfer the stress to the fibers, thus avoiding stress concentration in local areas.

[0048] like Figure 1-5 As shown, in this embodiment, further, the side groove wall 23 is parallel to the radial direction of the sandwich element 2 .

[0049] It should be noted that the radial parallelism of the side groove wall 23 and the interlayer part 2 can improve the space utilization rate of the first groove 21 and the second groove 22 on the interlayer part 2, so that the working head 1 is more firmly connected through the first protrusion 4 and the first groove 21, and the connecting head 3 is more firmly connected through the second protrusion 5 and the second groove 22.

[0050] like Figure 1-5 As shown, in this embodiment, further, the groove walls of the first groove 21 and the second groove 22 close to the central axis of the sandwich member 2 are top groove walls 24, and a second arc column 26 is provided on the top groove wall 24. The plane of the side of the second arc column 26 is in contact with the wall surface of the top groove wall 24, and the axial direction of the second arc column is parallel to the axial direction of the sandwich member 2.

[0051] It should be noted that a second arc column 26 is provided on the top groove wall 24 of the first groove 21 and the second groove 22 of the sandwich member 2. The arc transition can smooth the sudden change of the geometric shape, avoid the sudden change and density of the stress streamline, and thus reduce the increase of local stress. The edge shapes of the first protrusion 4 on the working head 1 and the second protrusion 5 on the connecting head 3 also have corresponding arcs, so that the working head 1, the sandwich member 2 and the connecting head 3 can fit together.

[0052] The second arc-shaped column 26 is provided on the top groove wall 24 of the first groove 21 and the second groove 22, and the first arc-shaped column 25 is provided on the side groove wall 23. Therefore, the first groove 21 and the second groove 22 have multiple arc-shaped transitions, so that when the live insulating tool tightens the bolt, the stress distribution of the sandwich component 2 is smoother, thereby enhancing the reliability of the overall structure of the live insulating tool.

[0053] The second arc-shaped columns 26 on the top groove walls 24 of the plurality of first grooves 21 and second grooves 22 together form a cylinder, and the structure is more stable and reliable.

[0054] like Figure 1-3 As shown, in this embodiment, further, the first groove 21 extends from the groove wall away from the central axis of the sandwich member 2 to the outer side surface of the sandwich member 2, and the second groove 22 extends from the groove wall away from the central axis of the sandwich member 2 to the outer side surface of the sandwich member 2. The outer side wall of the first protrusion 4 and the outer side wall of the working head 1 are aligned along the axial direction of the sandwich member 2, and the outer side wall of the second protrusion 5 and the outer side wall of the connecting head 3 are aligned along the axial direction of the sandwich member 2.

[0055] It should be noted that the first groove 21 extends from the groove wall away from the central axis of the sandwich member 2 to the outer side surface of the sandwich member 2, and the second groove 22 extends from the groove wall away from the central axis of the sandwich member 2 to the outer side surface of the sandwich member 2. The outer side wall of the first protrusion 4 and the outer side wall of the working head 1 are aligned along the axial direction of the sandwich member 2, and the outer side wall of the second protrusion 5 and the outer side wall of the connecting head 3 are aligned along the axial direction of the sandwich member 2, thereby making the connection between the working head 1 and the sandwich member 2, and the connection between the connecting head 3 and the sandwich member 2 more stable.

[0056] like Figure 1-2 As shown, in this embodiment, further comprising:

[0057] The insulating sleeve 6 is sleeved on the outside of the working head 1, the sandwich member 2 and the connecting head 3.

[0058] It should be noted that the insulating sleeve 6 is put on the outside of the working head 1, the interlayer part 2 and the connecting head 3 to play an insulating role, preventing the user from touching the working head 1 that comes into contact with the live body, and further preventing the working head 1, the interlayer part 2 and the connecting head 3 from being separated.

[0059] like Figure 1-3As shown, in this embodiment, further, the second end of the connector 3 is a polygonal column.

[0060] It should be noted that the second end of the connector 3 is used to connect to the electric wrench. The second end of the connector 3 is a polygonal prism, and the hole at the connecting end of the electric wrench is a matching polygonal prism hole, so that the second end of the connector 3 is installed in the polygonal prism hole. The connector 3 will not rotate relative to the polygonal prism hole, thereby improving the stability of the installation.

[0061] like Figure 1-3 As shown, in this embodiment, further, the second end of the working head 1 is a bit screw or a sleeve screw.

[0062] It should be noted that the second end of the working head 1 is a screwdriver bit with a thin wedge-shaped head that can be inserted into the slot or notch of the screw head. Alternatively, the second end of the working head 1 is a sleeve screw with a hexagonal head, which is suitable for applications requiring greater torque.

[0063] In other embodiments, the second end of the working head 1 may adopt other structures as needed.

[0064] The working process of the present invention is as follows: the multiple first protrusions 4 on the first end of the working head 1 are embedded in the multiple first grooves 21 on the first end of the interlayer member 2, and the multiple second protrusions 5 on the first end of the connecting head 3 are embedded in the multiple second grooves 22 on the second end of the interlayer member 2, so as to realize the coaxial working head 1, interlayer member 2 and connecting head 3 being connected in sequence.

[0065] During operation, the second end of the connector 3 is connected to the electric wrench, and the second end of the working head 1 is applied to the bolt. When the electric wrench is operated to rotate the live insulating tool of the present application to tighten the bolt, since the multiple first grooves 21 and the multiple second grooves 22 on the sandwich member 2 are symmetrically arranged about the central axis of the sandwich member 2, the multiple first grooves 21 and the multiple second grooves 22 are evenly spaced along the circumference of the sandwich member 2, and the first grooves 21 and the second grooves 22 have the same shape, the working head 1 and the connector 3 are connected through the sandwich member 2. When the live insulating tool is subjected to rotational torque, the stress it is subjected to is positive, effectively avoiding the generation of tangential stress concentration.

[0066] The sandwich component 2 is made of carbon fiber reinforced composite material. Since the axial tensile strength of the fiber in the carbon fiber reinforced composite material is much higher than the shear strength, the normal stress causes the load to be completely borne by the fiber, preventing the matrix from bearing tangential stress, and effectively avoiding the situation where tangential stress concentration occurs in the live insulating tool.

[0067] In summary, the embodiments of the present invention provide an electric wrench live insulating tool that can effectively avoid the occurrence of tangential stress concentration.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An electric wrench live insulating tool, characterized in that: include: A working head, a sandwich component and a connecting head are coaxially connected in sequence; A plurality of first grooves symmetrically arranged about the central axis are formed at the first end of the sandwich member, and a plurality of second grooves symmetrically arranged about the central axis are formed at the second end of the sandwich member, wherein the first grooves and the second grooves have the same shape, and the plurality of first grooves and the plurality of second grooves are evenly spaced along the circumference of the sandwich member; The first end of the working head is provided with a plurality of first protrusions symmetrically arranged about the central axis, and the plurality of first protrusions are respectively engaged with the plurality of first grooves; The first end of the connector is provided with a plurality of second protrusions symmetrically arranged about the central axis, the plurality of second protrusions are respectively engaged with the plurality of second grooves, and the second end of the connector is used for connecting an electric wrench.

2. The electric wrench live insulating tool according to claim 1, characterized in that: The sandwich component is made of carbon fiber reinforced composite material.

3. The electric wrench live insulating tool according to claim 1, characterized in that: The groove walls of the first groove and the second groove along the circumferential sides of the sandwich component are side groove walls, and a first arc column is provided on the side groove wall. The plane of the side portion of the first arc column is in contact with the wall surface of the side groove wall, and the axial direction of the first arc column is parallel to the axial direction of the sandwich component.

4. The electric wrench live insulating tool according to claim 3, characterized in that: The first arc-shaped columns on the side groove walls of the adjacent first groove and the second groove together form a cylinder.

5. The electric wrench live insulating tool according to claim 3, characterized in that: The side groove wall is parallel to the radial direction of the sandwich element.

6. The electric wrench live insulating tool according to claim 1, characterized in that: The groove walls of the first groove and the second groove close to the central axis of the sandwich component are top groove walls, and a second arc column is provided on the top groove wall. The plane of the side of the second arc column is in contact with the wall surface of the top groove wall, and the axial direction of the second arc column is parallel to the axial direction of the sandwich component.

7. The electric wrench live insulating tool according to claim 1, characterized in that: The groove wall of the first groove is away from the central axis of the sandwich and extends to the outer side surface of the sandwich. The groove wall of the second groove is away from the central axis of the sandwich and extends to the outer side surface of the sandwich. The outer side wall of the first protrusion and the outer side wall of the working head are aligned along the axial direction of the sandwich. The outer side wall of the second protrusion and the outer side wall of the connecting head are aligned along the axial direction of the sandwich.

8. The electric wrench live insulating tool according to claim 1, characterized in that: Also includes: An insulating sleeve is sleeved on the outside of the working head, the sandwich member and the connecting head.

9. The electric wrench live insulating tool according to claim 1, characterized in that: The second end of the connector is a polygonal column.

10. The electric wrench live insulating tool according to claim 1, characterized in that: The second end of the working head is a screwdriver bit or a sleeve screw.

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