Electric head torque calibration adjusting tool

Abstract

The application belongs to the technical field of electric head maintenance, and particularly relates to an electric head torque calibration adjusting tool, which comprises a nut sleeve and a screwdriver. The nut sleeve comprises a barrel and a first handle part connected with the barrel, and the barrel is used for sleeving and clamping on the nut. The screwdriver comprises a rod part, a head part and a second handle part. The head part is connected to one end of the rod part, and an insertion structure is arranged on the end surface of the head part away from the rod part. The insertion structure is used for being inserted into a groove of a screw. The second handle part is connected to the other end of the rod part. The head part and the rod part are used for being inserted into the barrel and can rotate in the barrel. The second handle part is exposed outside the barrel, so that after an operator releases the second handle part, the insertion structure of the screwdriver cannot be taken out of the groove of the screw. Therefore, it is not necessary to align the insertion structure with the groove again, personnel fatigue is reduced, the risk of component damage and personnel injury is reduced, and the working efficiency of electric head torque calibration is improved.

Description

Technical Field

[0001] This application belongs to the field of electric head repair technology, and in particular relates to an electric head torque calibration and adjustment tool. Background Technology

[0002] In the nuclear facility operation system, nuclear-grade electric actuators are key components that ensure the safe and stable operation of nuclear facilities. The accurate calibration of their torque values ​​directly determines the reliability of the actuators' actions, thereby affecting the overall operational safety of the nuclear facility.

[0003] To ensure the electric motor's torque output meets design standards, the distance between its torque limit switch and the cam needs to be adjusted periodically. Adjusting this distance typically involves tightening the screws securing the cam and the nuts fitted over them. In actual disassembly and adjustment, the electric motor torque calibration process is inefficient and carries the risk of personal injury and component damage. Utility Model Content

[0004] The purpose of this application is to provide a motor head torque calibration and adjustment tool, which aims to solve the technical problems of low efficiency and the risk of personnel injury and component damage in the existing motor head torque calibration work.

[0005] To achieve the above objectives, one technical solution adopted in this application is as follows: an electric head torque calibration and adjustment tool includes a nut sleeve and a screwdriver. The nut sleeve includes a cylindrical body and a first handle connected to the cylindrical body. The cylindrical body is used to fit and engage with the outside of a nut. The screwdriver includes a rod, a head, and a second handle. The head is connected to one end of the rod, and the end face of the head facing away from the rod has an insertion structure for inserting into the groove of a screw. The second handle is connected to the other end of the rod. The head and rod are used to insert into the cylindrical body and can rotate inside the cylindrical body. The second handle protrudes outside the cylindrical body.

[0006] Optionally, the cylinder includes a first cylinder section and a second cylinder section connected to each other. The first cylinder section has a locking hole adapted to the shape of the nut, and the second cylinder section has a through hole communicating with the locking hole. The locking hole is used to receive the head, and the rod is used to pass through the through hole. The diameter of the head is larger than the diameter of the through hole.

[0007] Optionally, the rod includes a first rod segment and a second rod segment. One end of the first rod segment is connected to the head and is used to pass through the through hole. The second rod segment is connected between the second handle and the other end of the first rod segment. The diameter of the second rod segment is larger than the diameter of the through hole.

[0008] Optionally, an observation hole is provided on the outer peripheral wall of the first cylindrical section.

[0009] Optionally, there are multiple observation holes, which are arranged at intervals along the circumference of the first cylindrical section.

[0010] Optionally, the engagement hole is a hexagonal hole, and / or the insertion structure is a straight protrusion, a cross protrusion, or a hexagonal protrusion.

[0011] Optionally, the first handle portion is arranged perpendicular to the cylinder body; and / or, the second handle portion is arranged perpendicular to the rod portion.

[0012] Optionally, the electric head torque calibration and adjustment tool also includes a feeler gauge tool, which includes a fixed base and at least one feeler gauge, one end of which is connected to the fixed base; the first handle is provided with a receiving hole, the feeler gauge is used to be inserted into the receiving hole, and the fixed base is used to seal the opening of the receiving hole.

[0013] Optionally, the feeler gauge tool also includes a retaining pin. The end of the feeler gauge has a connecting hole, and the mounting base has a insertion hole. The retaining pin is used to pass through the connecting hole and the insertion hole.

[0014] Optionally, the first handle is provided with a marking structure for indicating the direction of screwdriver rotation.

[0015] The electric head torque calibration and adjustment tool provided in this application has at least one of the following technical effects: When using the electric head torque calibration and adjustment tool, the operator places the sleeve of the nut socket on the nut, then inserts the plug-in structure of the screwdriver head into the groove of the screw. The operator holds the first handle and the second handle with both hands respectively. One hand fixes the first handle, while the other hand rotates the second handle. The rotation of the second handle drives the rod and head connected to it to rotate, thereby turning the screw. After the second handle is rotated to a certain position, the operator can release the second handle, flip the hand, and then grasp the second handle again, thus achieving wrist flipping. During this process, as the head and shaft of the screwdriver are inserted into the cylinder, the cylinder can limit the head and shaft of the screwdriver, so that after the operator releases the second handle, the screwdriver can be fixed in the cylinder. This makes it less likely for the screwdriver's insertion structure to come out of the screw's groove, thus reducing the number of times the insertion structure needs to be aligned with the groove, reducing operator fatigue, lowering the risk of component damage and personnel injury, and also improving the efficiency of electric head torque calibration. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the electric head torque calibration and adjustment tool provided in some embodiments of this application.

[0018] Figure 2 An exploded view of the electric head torque calibration and adjustment tool provided in some other embodiments of this application.

[0019] Figure 3 for Figure 1 The diagram shows the structure of the electric head torque calibration and adjustment tool.

[0020] Figure 4 For along Figure 3 Sectional view along line AA in the middle.

[0021] Figure 5 This is a schematic diagram of the structure of a nut sleeve provided in some embodiments of this application.

[0022] The following are the labeling elements in the figure: 1. Electric head torque calibration and adjustment tool; 11. Nut sleeve; 111. Cylinder body; 11101. First step surface; 1111. First cylinder section; 11111. Engaging hole; 11112. Observation hole; 1112. Second cylinder section; 11121. Through hole; 112. First handle; 1121. Marking structure; 1122. Receiving hole; 12. Screwdriver; 121. Rod; 12101. Second step surface; 1211. First rod section; 1212. Second rod section; 122. Head; 1221. Insertion structure; 123. Second handle; 13. Feeler gauge tool; 131. Fixing base; 1311. Base body; 1312. Threaded section; 1313. Protrusion; 13131. Insertion hole; 132. Feeler gauge; 1321. Connecting hole; 133. Fixing pin. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include at least one of that feature.

[0025] In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this application, it should be understood that the terms "inner", "outer", "side", "upper", "bottom", "front", "rear", etc., indicating the orientation or positional relationship are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] In the description of this application, it should be noted that the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0030] It should also be noted that in the embodiments of this application, the same reference numerals are used to represent the same component or part. For the same part in the embodiments of this application, the reference numerals may only be used to mark one part or component as an example. It should be understood that the reference numerals are also applicable to other identical parts or components.

[0031] The electric actuators used in nuclear power plants, officially called nuclear power plant electric valve actuators, are often simply referred to as electric actuators. Their core function is to remotely control the opening and closing of valves via manual operation by personnel in the main control room or through automatic control signals, thereby effectively improving the automation level of the power plant. Internally, the electric actuator consists of key components such as an electric motor, worm gear, self-locking clutch, reduction gear, travel limit mechanism, torque switch mechanism, valve position feedback device, and electrical control mechanism. These components work together to ensure its driving and control performance.

[0032] Due to the extremely high requirements for unit operational stability and equipment reliability in nuclear power plants, a strict maintenance program has been established for the electric motor heads. This program mandates a disassembly and overhaul of the electric motor head every ten years, focusing on checking the wear and tear of internal components and promptly replacing seals and lubricating oil to maintain equipment performance. Currently, nuclear power plants use a large number of SN-type electric motor heads, with a cumulative total of over 1,000 units across multiple sites. Therefore, during annual unit overhauls, a significant amount of disassembly and overhaul work on SN-type electric motor heads must be scheduled. Furthermore, after disassembly and overhaul, all electric motor heads must undergo torque calibration to ensure that their torque output meets operational standards.

[0033] During the torque calibration process of the electric screwdriver, the operator needs to hold a flathead screwdriver with one hand, applying force while suspended in the air, while simultaneously holding a wrench with the other hand to loosen the hex nut that mates with the screw. After the hex nut is loosened, one hand must continue to hold the wrench to prevent the nut from rotating with the screw. The other hand continues to adjust the screw while suspended in the air with the flathead screwdriver. Since the screw needs to be rotated multiple times to reach the pre-calibrated position, the operator can only apply force continuously by adjusting their wrist position with one hand. This requires frequently pulling the screwdriver out of the screw's groove, adjusting the hand position with the wrist, and then carefully reinserting it into the groove before continuing to tighten the screw. When the screw has rotated to the pre-calibrated number of turns, one hand must again apply force while suspended in the air to prevent the screw from shifting. At the same time, the other hand uses the wrench to tighten the hex nut, finally achieving a secure screw.

[0034] The torque calibration of the electric actuator cannot be successful on the first try. It usually requires 10 repeated pre-calibration operations. Each calibration must repeat the complete process of "loosening the nut - adjusting the screw - tightening the nut" until the torque value is calibrated to be qualified. In addition, the torque values ​​in the "on-off torque" and "off torque" directions must be calibrated separately to ensure that the torque output in both directions meets the requirements.

[0035] During the aforementioned calibration process, on the one hand, operators need to maintain a posture of "operating the screwdriver with one hand suspended in the air and holding the wrench with the other hand" for extended periods. This is especially problematic during multi-turn screw rotations, where the "single-hand multi-turn wrist adjustment posture" and "repeated insertion and removal for alignment" movements easily lead to hand muscle soreness. On the other hand, when the flathead screwdriver is being operated while suspended in the air, the alignment between the head and the screw's groove is difficult to maintain stably, making it prone to slipping out of the groove. This can not only cause hand injuries to the operator but also deform and damage the screw's groove, affecting the reliability of subsequent component mating. Therefore, simplifying screwdriver operation, reducing operator fatigue, minimizing hand injuries and component damage, and improving work efficiency are crucial research areas for electric head torque adjustment.

[0036] Based on this, this application provides an electric head torque calibration and adjustment tool, in which the head of the screwdriver can be inserted into the cylinder of the nut sleeve. In this way, during the wrist operation, the screwdriver is supported by the outer peripheral wall of the cylinder and can be stably fixed in the cylinder. At the same time, it is also stably inserted into the groove of the screw. This eliminates the need to repeatedly insert the screw into the groove during the torque adjustment process, reducing the risk of personnel fatigue, injury, and component damage, and also helps to improve the working efficiency of electric head torque calibration.

[0037] The following combination Figures 1-5 The electric head torque calibration and adjustment tool 1 of the present application embodiment will be described.

[0038] like Figures 1-2 As shown, in some embodiments, the electric head torque calibration and adjustment tool 1 includes a nut sleeve 11 and a screwdriver 12. The nut sleeve 11 includes a cylinder 111 and a first handle portion 112 connected to the cylinder 111. The cylinder 111 is used to fit and engage with the nut. The screwdriver 12 includes a rod portion 121, a head 122, and a second handle portion 123. The head 122 is connected to one end of the rod portion 121. The end face of the head 122 facing away from the rod portion 121 is provided with a plug-in structure 1221, which is used to insert into the groove of the screw. The second handle portion 123 is connected to the other end of the rod portion 121. The head 122 and the rod portion 121 are used to insert into the cylinder 111 and can rotate inside the cylinder 111. The second handle portion 123 is exposed outside the cylinder 111.

[0039] A screw can refer to a rod with external threads and a groove on its end face. The groove can be slotted, Phillips head, hexagonal, etc. Inside the electric motor, the operator rotates the screw on the electric motor to move the cam on the screw back and forth, adjusting the distance between the limit switch and the cam, thereby adjusting the torque value. A nut can refer to a hexagonal nut, etc., screwed onto the screw, which the operator can use to fix the screw.

[0040] The nut sleeve 11 refers to a sleeve used to fit and engage with a nut. The nut sleeve 11 includes a cylindrical body 111 and a first handle portion 112. The shape of the inner hole of the cylindrical body 111 is adapted to the shape of the nut. The operator can hold the first handle portion 112 to fix the sleeve, thus preventing the nut from rotating with the screw. For example, if the nut is a hexagonal nut, the inner hole of the sleeve is a hexagonal hole. The first handle portion 112 can be a rod, and it can be perpendicular to the cylindrical body 111 to facilitate the operator's grip on the first handle portion 112, thereby restricting the circumferential movement of the cylindrical body 111. Alternatively, in other examples, the first handle portion 112 can be coaxially arranged with the cylindrical body 111.

[0041] The cylinder 111 and the first handle part 112 can be fixedly connected by welding, snap-fitting, or bonding. For example, the cylinder 111 and the first handle part 112 are connected by welding, which has high connection strength and good connection reliability, and is conducive to improving the service life of the electric head torque calibration and adjustment tool 1.

[0042] The screwdriver 12 can refer to a component used to insert into the groove of a screw to rotate the screw. The screwdriver 12 includes a shank 121, a head 122, and a second handle 123. The head 122 has a plug-in structure 1221, which can be a protrusion on the head 122 facing away from the shank 121. This protrusion is adapted to the shape of the groove of the screw, so that the protrusion can be inserted into the groove, thereby achieving relative fixation of the screw and the screwdriver 12. The shank 121 can refer to the part used to connect the head 122 and the second handle 123. The second handle 123 is the part for the operator to hold. The head 122 and the shank 121 can be inserted into the barrel 111, and the second handle 123 is exposed outside the barrel 111 for easy gripping by the operator. The head 122 and the rod 121 are clearance-fitted with the cylinder 111, allowing them to rotate within the cylinder 111. This enables the screwdriver 12 to rotate relative to the cylinder 111, thus tightening or loosening the screw. The second handle 123 is perpendicular to the rod 121, facilitating the operator to rotate the rod 121 via the second handle 123, thereby turning the screw. Alternatively, in other examples, the second handle 123 can be coaxially arranged with the rod 121.

[0043] In some examples, the head 122, the rod 121, and the second handle 123 can be fixedly connected by welding, snap-fitting, or bonding. For example, the head 122, the rod 121, and the second handle 123 are connected by welding, which has high connection strength and good connection reliability, and is conducive to improving the service life of the electric head torque calibration and adjustment tool 1.

[0044] In this embodiment of the electric head torque calibration and adjustment tool 1, when in use, the operator puts the cylinder 111 of the nut sleeve 11 onto the nut, and then inserts the plug-in structure 1221 of the screwdriver head 122 into the groove of the screw. The operator holds the first handle 112 and the second handle 123 with both hands respectively. One hand fixes the first handle 112, and the other hand rotates the second handle 123. The rotation of the second handle 123 drives the rod 121 and the head 122 connected to it to rotate, thereby turning the screw. After the second handle 123 is rotated to a certain position, the operator can release the second handle 123, flip the hand and then grasp the second handle 123 again, thus realizing the wrist flip. During this process, since the head 122 and the shaft 121 of the screwdriver 12 are inserted into the cylinder 111, the cylinder 111 can limit the head 122 and the shaft 121 of the screwdriver 12. This allows the screwdriver 12 to be fixed inside the cylinder 111 after the operator releases the second handle 123. This makes it difficult for the screwdriver 12's insertion structure 1221 to come out of the screw's groove. This reduces the number of times the insertion structure 1221 needs to be aligned with the groove, reduces operator fatigue, lowers the risk of component damage and operator injury, and also helps improve the efficiency of electric head torque calibration.

[0045] Please combine them together Figure 3 and Figure 4 As shown, in some embodiments, the cylinder 111 includes a first cylinder section 1111 and a second cylinder section 1112 connected to each other. The first cylinder section 1111 has a locking hole 11111 adapted to the shape of a nut, and the second cylinder section 1112 has a through hole 11121 communicating with the locking hole 11111. The locking hole 11111 is used to receive the head 122, and the rod 121 is used to pass through the through hole 11121. The diameter d1 of the head 122 is larger than the aperture D1 of the through hole 11121.

[0046] The cylinder 111 can be divided into two sections along its length, one of which is the first cylinder section 1111 and the other is the second cylinder section 1112. The first cylinder section 1111 and the second cylinder section 1112 are cylindrical in shape; of course, the shape of the first cylinder section 1111 and the shape of the second cylinder section 1112 can also be prismatic, elliptical, or other shapes.

[0047] The inner hole of the first cylindrical section 1111 is the engaging hole 11111. The shape of the engaging hole 11111 is adapted to the shape of the nut so as to fit and engage with the nut to achieve circumferential fixation of the nut. For example, the engaging hole 11111 is hexagonal and the nut is a hexagonal nut.

[0048] The inner hole of the second cylindrical section 1112 forms a through hole 11121. The shape of the through hole 11121 can be adapted to the shape of the rod 121. For example, the rod 121 is cylindrical, and the through hole 11121 can be a round hole.

[0049] The outer diameters of the first cylindrical section 1111 and the second cylindrical section 1112 may be the same or different. For example, the cylindrical section 111 is a stepped cylindrical section 111, with the section with the larger outer diameter being the first cylindrical section 1111 and the section with the smaller outer diameter being the second cylindrical section 1112.

[0050] The first cylindrical section 1111 and the second cylindrical section 1112 can be integrally molded, for example, the first cylindrical section 1111 and the second cylindrical section 1112 can be integrally injection molded; or, the first cylindrical section 1111 and the second cylindrical section 1112 can be molded separately and then assembled together, for example, the first cylindrical section 1111 and the second cylindrical section 1112 can be welded together.

[0051] The depth of the engagement hole 11111 is greater than the height of the nut. After the first cylindrical section 1111 is fitted onto the nut, the head 122 is received in the engagement hole 11111 and located between the nut and the second cylindrical section 1112. The rod 121 passes through the through hole 11121. The diameter d1 of the head 122 is greater than the diameter D1 of the through hole 11121. The diameter D2 of the engagement hole 11111 is greater than the diameter D1 of the through hole 11121. A first stepped surface 11101 can be formed between the engagement hole 11111 and the through hole 11121. The first stepped surface 11101 can prevent the head 122 from coming out of the cylindrical section 111 through the through hole 11121.

[0052] By adopting the technical solution of this embodiment, after the first cylindrical section 1111 is sleeved on the nut, the head 122 will not come out of the cylindrical section 111 through the through hole 11121. This facilitates the stable insertion of the screwdriver 12 into the groove of the screw, which is convenient for subsequent operations and effectively reduces the risk of personnel fatigue and injury. In addition, the operation is simple and also helps to improve the working efficiency of electric head torque calibration.

[0053] In some embodiments, the rod portion 121 includes a first rod segment 1211 and a second rod segment 1212. One end of the first rod segment 1211 is connected to the head 122. The first rod segment 1211 is used to pass through the through hole 11121. The second rod segment 1212 is connected between the second handle portion 123 and the other end of the first rod segment 1211. The rod diameter d3 of the second rod segment 1212 is greater than the hole diameter D1 of the through hole 11121.

[0054] The rod 121 is a stepped rod. The section with the larger diameter is the second rod segment 1212, and the section with the smaller diameter is the first rod segment 1211. The diameter d2 of the first rod segment 1211 is smaller than the diameter d3 of the second rod segment 1212. A second stepped surface 12101 can be formed between the second rod segment 1212 and the first rod segment 1211. The first rod segment 1211 passes through the through hole 11121. The diameter d3 of the second rod segment 1212 is larger than the diameter D1 of the through hole 11121. The second stepped surface 12101 can... The second rod segment 1212 is blocked from entering the through hole 11121, thereby preventing the second rod segment 1212 from coming out through the through hole 11121 and the engagement hole 11111. In addition, the head 122 will not come out through the through hole 11121, so that the nut sleeve 11 and the screwdriver 12 are connected as a whole. In this way, the nut sleeve 11 and the screwdriver 12 will not separate. The whole tool can be held by simply holding the first handle 112, so that the screwdriver 12 can be released with one hand without the screwdriver 12 falling off.

[0055] The first segment 1211 and the second segment 1212 can be formed separately and then assembled together. For example, the first segment 1211 and the second segment 1212 can be welded together. The first segment 1211 is inserted into the through hole 11121 and then connected to the second segment 1212 to facilitate the assembly of the nut sleeve 11 and the screwdriver 12.

[0056] The second handle portion 123 and the second rod segment 1212 can be integrally molded, for example, the second handle portion 123 and the second rod segment 1212 can be integrally injection molded; or, the second handle portion 123 and the second rod segment 1212 can be molded separately and then assembled together, for example, the second handle portion 123 and the second rod segment 1212 can be welded together.

[0057] The head 122 and the first rod segment 1211 can be an integrally molded structure, for example, the head 122 and the first rod segment 1211 can be integrally injection molded; or, the head 122 and the first rod segment 1211 can be molded separately and then assembled together, for example, the head 122 and the first rod segment 1211 can be welded together.

[0058] In some embodiments, the length L1 of the first rod segment 1211 is greater than the length L2 of the first cylindrical segment 1111, which allows the screwdriver 12 to have a certain amount of movement space in the axial direction of the through hole 11121, so as to facilitate the tightening and loosening of the screw. The specific length relationship can be set according to actual needs.

[0059] In some embodiments, the diameter d2 of the first rod segment 1211 is smaller than the diameter D1 of the through hole 11121, so as to facilitate the screwdriver 12 to move and rotate along the axial direction of the through hole 11121.

[0060] In some embodiments, the outer peripheral wall of the first cylindrical section 1111 is provided with an observation hole 11112.

[0061] The observation hole 11112 penetrates the outer peripheral wall of the first cylindrical section 1111. The observation hole 11112 can be a waist hole and extends along the axial direction of the through hole 11121. The observation hole 11112 allows the operator to observe whether the plug-in structure 1221 is inserted into the groove of the screw, reducing the difficulty of fitting the plug-in structure 1221 and the groove, and facilitating the calibration and adjustment of the electric head torque.

[0062] In some embodiments, there are multiple observation holes 11112, and the multiple observation holes 11112 are arranged at intervals along the circumference of the first cylindrical section 1111.

[0063] The number of observation holes 11112 is two, three or more, and the multiple observation holes 11112 are arranged at intervals along the circumference of the first cylindrical section 1111, so that the insertion of the insertion structure 1221 and the groove can be observed from multiple directions of the first cylindrical section 1111, making the insertion operation of the insertion structure 1221 and the groove simpler and helping to improve the calibration and adjustment efficiency of the electric head torque.

[0064] In some examples, there are three observation holes 11112, which are evenly spaced around the circumference of the first cylindrical section 1111.

[0065] In some embodiments, the engagement hole 11111 is a hexagonal hole, and / or the insertion structure 1221 is a straight protrusion, a cross protrusion, or a hexagonal protrusion.

[0066] The engagement hole 11111 is hexagonal in shape, and hexagonal nuts are commonly used nuts. The engagement hole 11111 is hexagonal and can be used for the torque calibration requirements of most electric actuators.

[0067] The grooves of screws are commonly slotted, cross-shaped, or hexagonal. The insertion structure 1221 is a protrusion structure provided on the end face of the head 122 facing away from the rod 121. This protrusion structure can be slotted, cross-shaped, or hexagonal, which can better adapt to the rotation requirements of most screws.

[0068] In some embodiments, the first handle portion 112 is disposed perpendicular to the cylinder 111; and / or, the second handle portion 123 is disposed perpendicular to the rod portion 121.

[0069] The first handle part 112 is a rod part 121. One end of the first handle part 112 is welded to the outer peripheral wall of the cylinder 111 and is set perpendicular to the cylinder 111. The first handle part 112 is set perpendicular to the cylinder 111, so only a force opposite to the rotation direction of the nut needs to be applied to the first handle part 112 to stop the nut from rotating, which can stop the nut from rotating in a relatively time-saving and labor-saving way.

[0070] The second handle portion 123 is a rod portion 121. The end or middle of the second handle portion 123 is welded to the end of the second rod segment 1212 facing away from the first rod segment 1211 and is perpendicular to the second rod segment 1212. The second handle portion 123 is perpendicular to the rod portion 121, so that only the second handle portion 123 needs to be pushed to drive the rod portion 121 to rotate, which can drive the screw to rotate in a more time-saving and labor-saving way.

[0071] In some cases, during the torque calibration and adjustment process of the electric head, it is also necessary to use feeler gauge tool 13 to measure the distance between the cam and the limit switch.

[0072] In some embodiments, the electric head torque calibration and adjustment tool 1 further includes a feeler gauge tool 13, which includes a fixed base 131 and at least one feeler gauge 132. One end of the feeler gauge 132 is connected to the fixed base 131. The first handle portion 112 is provided with a receiving hole 1122, and the feeler gauge 132 is used to be inserted into the receiving hole 1122. The fixed base 131 is used to seal the opening of the receiving hole 1122.

[0073] The feeler gauge tool 13 can refer to a component used to measure the distance between the cam and the limit switch. The feeler gauge tool 13 includes a feeler gauge 132 and a fixing seat 131. The fixing seat 131 can refer to a component used to fix the feeler gauge 132. The feeler gauge 132 can refer to a sheet-like component with a preset thickness. If the feeler gauge 132 can be easily inserted between the cam and the limit switch without obvious looseness, or if slight resistance is felt when it is inserted, then the thickness of the feeler gauge 132 is approximately equal to the gap between the cam and the limit switch. In this way, the distance between the cam and the limit switch can be obtained.

[0074] The first handle portion 112 is hollow inside, forming a receiving hole 1122. A feeler gauge 132 is placed inside the receiving hole 1122, and a fixing seat 131 seals the opening of the receiving hole 1122, thereby enclosing the feeler gauge 132 inside the receiving hole 1122. When it is necessary to measure the distance between the cam and the limit switch, the fixing seat 131 and the feeler gauge 132 are removed from the receiving hole 1122, and then the feeler gauge 132 is inserted between the cam and the limit switch for measurement.

[0075] The fixing seat 131 can be fixed to the opening of the receiving hole 1122 by means of snap-fit, thread, etc.

[0076] By adopting the technical solution of this embodiment, the feeler gauge tool 13 can be directly accommodated in the receiving hole 1122 inside the first handle 112, which can make full use of the internal space of the entire tool, improve the structural compactness, and help reduce the size of the entire tool. In addition, the tool integrates the feeler gauge tool 13, which can realize the distance measurement between the cam and the limit switch, which helps to improve the practicality of the tool.

[0077] In some embodiments, the feeler gauge tool 13 further includes a fixing pin 133, the end of the feeler gauge 132 is provided with a connecting hole 1321, the fixing base 131 is provided with a insertion hole 13131, and the fixing pin 133 is used to pass through the connecting hole 1321 and the insertion hole 13131.

[0078] The retaining pin 133 refers to a component used to connect the feeler gauge 132 and the fixed base 131. The retaining pin 133 can be a cylindrical structure or a similar cylindrical structure. For example, the retaining pin 133 can also be a structure with a larger diameter at one end to prevent the feeler gauge 132 from falling off the retaining pin 133. When the retaining pin 133 is inserted into the connecting hole 1321 of the feeler gauge 132 and the insertion hole 13131 of the fixed base 131, the feeler gauge 132 can be connected to the fixed base 131. If the retaining pin 133 is removed from the connecting hole 1321 and the insertion hole 13131, the feeler gauge 132 is separated from the fixed base 131, thereby facilitating the measurement of the distance between the cam and the limit switch by the feeler gauge 132.

[0079] By adopting the technical solution of this embodiment, the feeler gauge 132 and the fixed seat 131 are connected by the cooperation of the fixing pin 133 with the connecting hole 1321 and the insertion hole 13131. The fixing pin 133 is easy to disassemble and assemble, which facilitates the disassembly and assembly of the feeler gauge 132 and the fixed seat 131, and makes it convenient for the feeler gauge 132 to measure.

[0080] In some embodiments, the fixing base 131 includes a base body 1311, a threaded section 1312, and a protrusion 1313. The threaded section 1312 is connected between the base body 1311 and the protrusion 1313. The threaded section 1312 is used for threaded connection within the receiving hole 1122. The insertion hole 13131 passes through the protrusion 1313 along an axial direction perpendicular to the threaded section 1312. The number of feeler gauges 132 can be one or more. If there are multiple feeler gauges 132, the multiple feeler gauges 132 can be distributed on opposite sides of the protrusion 1313 and fixed by a fixing pin 133 passing through the connecting hole 1321 of the feeler gauge 132 and the insertion hole 13131 of the protrusion 1313. The multiple feeler gauges 132 are distributed on opposite sides of the protrusion 1313, which can make full use of the space within the receiving hole 1122 and improve the structural compactness.

[0081] Please combine them together Figure 5 As shown, in some embodiments, the first handle portion 112 is provided with an marking structure 1121 for marking the rotation direction of the screwdriver 12.

[0082] The marking structure 1121 can refer to a sticker, printed structure, raised or recessed structure, etc., provided on the first handle portion 112. For example, the marking structure 1121 includes two mirror-shaped triangles provided on the first handle portion 112, with the direction of the triangles representing different rotation directions, thereby indicating different rotation directions of the screw; the triangles also have circles and text, and the rotation direction of the screw can be clearly displayed by using triangles, circles, text, etc., to facilitate the operation of the operator.

[0083] By adopting the technical solution of this embodiment, the rotation direction of the screw can be clearly marked by the marking structure 1121, reducing the risk of human error and improving the efficiency of screw torque calibration and adjustment.

[0084] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A tool for calibrating and adjusting the torque of an electric head, characterized in that, include: A nut sleeve includes a cylindrical body and a first handle connected to the cylindrical body, the cylindrical body being used to fit and engage with a nut. A screwdriver includes a shaft, a head, and a second handle. The head is connected to one end of the shaft, and the end face of the head facing away from the shaft has a plug-in structure for inserting into a groove of a screw. The second handle is connected to the other end of the shaft. The head and the shaft are used to insert into a cylindrical body and can rotate within the cylindrical body. The second handle protrudes outside the cylindrical body.

2. The electric head torque calibration and adjustment tool according to claim 1, characterized in that: The cylinder includes a first cylinder section and a second cylinder section connected to each other. The first cylinder section has a locking hole adapted to the shape of the nut, and the second cylinder section has a through hole communicating with the locking hole. The locking hole is used to receive the head, and the rod is used to pass through the through hole. The diameter of the head is larger than the diameter of the through hole.

3. The electric head torque calibration and adjustment tool according to claim 2, characterized in that: The rod includes a first rod segment and a second rod segment. One end of the first rod segment is connected to the head and is used to pass through the through hole. The second rod segment is connected between the second handle and the other end of the first rod segment. The diameter of the second rod segment is larger than the diameter of the through hole.

4. The electric head torque calibration and adjustment tool according to claim 2, characterized in that: The outer peripheral wall of the first cylindrical section is provided with an observation hole.

5. The electric head torque calibration and adjustment tool according to claim 4, characterized in that: The number of observation holes is multiple, and the multiple observation holes are arranged at intervals along the circumference of the first cylindrical section.

6. The electric head torque calibration and adjustment tool according to claim 2, characterized in that: The engagement hole is a hexagonal hole, and / or the insertion structure is a straight protrusion, a cross protrusion, or a hexagonal protrusion.

7. The electric head torque calibration and adjustment tool according to any one of claims 1 to 6, characterized in that: The first handle portion is arranged perpendicularly to the cylinder body; and / or, the second handle portion is arranged perpendicularly to the rod portion.

8. The electric head torque calibration and adjustment tool according to any one of claims 1 to 6, characterized in that: The electric head torque calibration and adjustment tool also includes a feeler gauge tool, which includes a fixed base and at least one feeler gauge. One end of the feeler gauge is connected to the fixed base. The first handle is provided with a receiving hole, and the feeler gauge is used to be inserted into the receiving hole. The fixed base is used to seal the opening of the receiving hole.

9. The electric head torque calibration and adjustment tool according to claim 8, characterized in that: The feeler gauge tool also includes a fixing pin. The end of the feeler gauge is provided with a connecting hole, and the fixing base is provided with a insertion hole. The fixing pin is used to pass through the connecting hole and the insertion hole.

10. The electric head torque calibration and adjustment tool according to any one of claims 1 to 6, characterized in that: The first handle is provided with an marking structure for indicating the rotation direction of the screwdriver.

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