Limiting device for nut stop washer

Abstract

The utility model belongs to fastener installation technical field, more specifically, it is related to a kind of limiting device of nut stop washer, it includes first limit rod, second limit rod and locking assembly, first limit rod has first positioning part, second limit rod has second positioning part, when using, first positioning part can be abutted with another nut of the side of nut to be fastened, second positioning part can be abutted with the stop washer of nut to be fastened, so it can be supported by first limit rod and second limit rod and another nut to the stop washer of nut to be fastened, directly constrain stop washer by first positioning part and second positioning part cooperation, limit the rotation of stop washer in nut fastening process, so it can save the step of repeatedly adjusting the position of stop washer, effectively improve bolt installation efficiency, reduce the residence time of operating personnel in nuclear island, reduce radiation risk.

Description

Technical Field

[0001] This application belongs to the field of fastener installation technology, and more specifically, relates to a limiting device for a nut locking washer. Background Technology

[0002] In the daily operation and maintenance of the nuclear island and conventional island, tightening and preventing loosening of valve bolts is a key aspect of ensuring the safe and stable operation of the system.

[0003] In related technologies, locking washers are often used to limit the rotation of nuts. The locking washer generally has a first lap lug and a second lap lug. The first lap lug is folded from the mounting surface of the nut to fit against the side adjacent to the mounting surface to limit the movement of the locking washer. The second lap lug fits against the side of the nut to cooperate with the first lap lug that fits against the surface of the equipment to limit the rotation of the nut.

[0004] However, during actual installation, as the tightening torque of the nut increases, the locking washer will rotate along with the nut. The first lap lug of the locking washer may rotate and become misaligned with the side of the equipment. After the first lap lug folds over, it cannot reliably fit against the side of the equipment, thus losing its restraining function. Therefore, during the actual bolt tightening process, the position of the first lap lug needs to be adjusted and corrected in real time to ensure that it always remains opposite to the side. As a result, the installation of a single bolt requires repeated adjustments and multiple tightenings to meet the usage requirements. The bolt tightening process consumes a lot of time to adjust the position of the locking washer, making it difficult to improve bolt installation efficiency, resulting in slow project progress and an increased risk of nuclear radiation exposure for workers inside the nuclear island. Utility Model Content

[0005] The purpose of this application is to provide a limiting device for a nut locking washer, so as to improve the problem that the locking washer rotates with the nut during the tightening process, causing the first lap joint to be unable to effectively limit the nut by folding.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A limiting device for a nut retaining washer is provided, used to limit the retaining washer during nut installation. The limiting device includes:

[0008] The first limiting rod has a first positioning part, which is adapted to abut against one of two adjacent nuts installed on the equipment;

[0009] A second limiting rod is movably connected to the first limiting rod. The second limiting rod has a second positioning part, which is set at an angle to the first positioning part and is used to abut against the stop washer corresponding to the other of the two adjacent nuts; and

[0010] The locking assembly connects the second limiting rod to the first limiting rod. When the locking assembly is in the locked state, the second limiting rod is locked to the first limiting rod. When the locking assembly is in the unlocked state, the second limiting rod can move relative to the first limiting rod.

[0011] In some embodiments, the locking assembly includes a connector and a first locking member. The connector is rotatably connected to the first limiting rod in the radial direction. The connector has a first connecting portion protruding from one side of the first limiting rod in the radial direction. A second limiting rod is connected to the first connecting portion. The connector also has a second connecting portion extending to the opposite side of the first limiting rod. The first locking member is rotatably connected to the second connecting portion.

[0012] The first locking member can cooperate with the first connecting part to clamp or release the first limiting rod, thereby locking the second limiting rod to the first limiting rod, or allowing the second limiting rod to rotate relative to the first limiting rod.

[0013] In some embodiments, the first limiting rod is provided with a first threaded hole, the first connecting part is provided with an external thread that matches the internal thread of the first threaded hole, the first connecting part is screwed into the first threaded hole, and the first locking member is a locking nut, which is screwed into the first connecting part.

[0014] In some embodiments, the second connecting part is provided with a second threaded hole, the axis of the second threaded hole intersects with the rotation axis of the connecting member, the second limiting rod is provided with an external thread that matches the internal thread of the second threaded hole, and the second limiting rod is screwed into the second threaded hole.

[0015] In some embodiments, the second positioning part is disposed at one end of the second limiting rod along the length direction, and the other end of the second limiting rod along the length direction passes through the second threaded hole;

[0016] The locking assembly also includes a second locking element, which is a locking nut, and is screwed to one end of the second limiting rod away from the second positioning part.

[0017] In some embodiments, a first positioning part is provided at one end of the first limiting rod along the length direction, and a handle part is provided at the other end of the first limiting rod along the length direction. A connecting member is provided between the first positioning part and the handle part. Along the length direction of the first limiting rod, the distance between the connecting member and the handle part is greater than the distance between the connecting member and the first positioning part.

[0018] In some embodiments, the first limiting rod is a metal rod, the handle is a rubber part provided on the first limiting rod, and / or, the second limiting rod is a metal rod.

[0019] In some embodiments, the second positioning portion is provided with at least one slot for the first overlapping ear of the stop pad to be fitted into.

[0020] In some embodiments, the slot is a notch located at the end of the second positioning portion opposite to the first limiting rod.

[0021] In some embodiments, the side of the first positioning part facing away from the second positioning part forms an abutment surface, which is used to abut against the side wall of the nut, and the abutment surface is a concave arc surface.

[0022] The nut locking washer limiting device provided in this application is suitable for limiting the rotation of a locking washer used to limit the nut during installation. The beneficial effect of this nut locking washer limiting device is that, in use, the limiting device is placed beside the nut installation position. For example, when the nut is installed on a flange, the limiting device is placed beside the inner or outer radial wall of the flange. The first positioning part is moved to abut against another nut beside the nut to be tightened. Then, the locking assembly is adjusted to release the second limiting rod. Force is applied to adjust the connection between the second limiting rod and the first limiting rod, causing the second positioning part to move to abut against the nut to be tightened. The locking washer of the nut abuts against the ground, and then the locking assembly is adjusted to lock the second limiting rod to the first limiting rod. The second limiting rod can no longer move relative to the first limiting rod. In this way, the first and second limiting rods, along with another nut next to it, provide support for the locking washer of the nut to be tightened. With the adjacent nut as a reference, the locking washer is directly constrained by the cooperation of the first and second positioning parts. This effectively restricts the rotation of the locking washer during the tightening process of the nut, thereby eliminating the need to repeatedly adjust the position of the locking washer, effectively improving the bolt installation efficiency, reducing the time that workers spend on the nuclear island, and reducing radiation risks. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a first-state view of a valve connection flange surface when a nut is installed in the relevant technology.

[0025] Figure 2 This is a second-state view of the valve connection flange surface in the relevant art.

[0026] Figure 3 A schematic diagram of the limiting device for the nut locking washer provided in the embodiments of this application;

[0027] Figure 4 for Figure 3 Another perspective view of the limiting device for the nut retaining washer shown;

[0028] Figure 5 for Figure 3 The diagram shows an exploded view of the limiting device.

[0029] Figure 6 For use Figure 3 The diagram shows the structure of the limiting device when it limits the stop washer of the nut installed on the flange.

[0030] The following are the labeling elements in the figure:

[0031] 100. Flange; 1001. Mounting surface; 1002. Support side;

[0032] 200. Nut; 201. Sidewall;

[0033] 300. Locking washer; 301. First lap joint; 302. Second lap joint;

[0034] 10. Limiting device; 11. First limiting rod; 111. First positioning part; 1111. Abutting surface; 112. First threaded hole; 113. Handle part; 12. Second limiting rod; 121. Second positioning part; 1211. Slot; 13. Locking assembly; 131. Connecting piece; 1311. First connecting part; 1312. Second connecting part; 1313. Second threaded hole; 132. First locking piece; 133. Second locking piece. Detailed Implementation

[0035] To make the technical problem to be solved, the technical solution and the beneficial effects of this application clearer, the following is in conjunction with the appendix. Figures 1 to 6 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, "multiple sets" means two or more sets, "multiple pieces" means two or more pieces, and "several" means one or more, unless otherwise explicitly specified.

[0039] In the daily operation and maintenance of the nuclear island and conventional island, the tightening and prevention of loosening of valve bolts are crucial to ensuring the safe and stable operation of the system. As key equipment for controlling fluid media, valves endure complex stresses such as pressure, temperature, and vibration under various operating conditions, placing stringent requirements on the reliability of bolt connections. Loosening of bolts can lead to gaps in the valve body connections, resulting in valve leakage.

[0040] In related technologies, locking washers are often used to limit the rotation of nuts. The locking washer generally has a first lap lug and a second lap lug. The first lap lug is folded from the mounting surface of the nut to fit against the side adjacent to the mounting surface to limit the movement of the locking washer. The second lap lug fits against the side of the nut to cooperate with the first lap lug that fits against the surface of the equipment to limit the rotation of the nut.

[0041] However, during actual installation, as the tightening torque of the nut increases, the locking washer will rotate along with the nut. The first lap lug of the locking washer may rotate and become misaligned with the side of the equipment. After the first lap lug folds over, it cannot reliably fit against the side of the equipment, thus losing its restraining function. Therefore, during the actual bolt tightening process, the position of the first lap lug needs to be adjusted and corrected in real time to ensure that it always remains opposite to the side. As a result, the installation of a single bolt requires repeated adjustments and multiple tightenings to meet the usage requirements. The bolt tightening process consumes a lot of time to adjust the position of the locking washer, making it difficult to improve bolt installation efficiency, resulting in slow project progress and an increased risk of nuclear radiation exposure for workers inside the nuclear island.

[0042] For example, such as Figure 1and Figure 2 As shown, the following description illustrates the installation of a nut 200 on a valve flange 100. The flange 100 has a mounting surface 1001 for installing the nut 200, and a supporting side surface 1002 adjacent to and located below the mounting surface 1001. The mounting surface 1001 is the axial surface of the flange 100, and the supporting side surface 1002 is the radial outer surface of the flange. When installing the nut 200, first insert the threaded rod into the flange 100, then place the retaining washer 300 onto the threaded rod, and then tighten the nut 200. At this time, the retaining washer 300 is subjected to the compressive force of the nut 200, and the second overlapping lug 302 abuts against the surface of the flange 100 facing the nut 200, i.e., the mounting surface 1001. Then, further force is applied to fold the first overlapping lug 301 of the washer downwards and abut against the side wall of the flange 100. Finally, a flat chisel is used to fold the second overlapping lug 302... The lug 302 is lifted off the surface of the flange 100, so that the second lap lug 302 is turned up toward the side wall 201 of the nut 200. Finally, the second lap lug 302 is struck toward the side of the nut 200 with a hammer or other tools, so that the second lap lug 302 fits against the side wall 201 of the nut 200. At the same time, the first lap lug 301 is folded over with a hammer or other tools to fit against the support side 1002 adjacent to the mounting surface 1001. In this way, the locking washer 300 can limit the loosening of the nut. However, during actual installation, when force is applied to tighten the nut 200, the retaining washer 300 will rotate along with the nut 200 due to the compressive force of the nut 200. During the tightening process of the nut 200, the position of the retaining washer 300 needs to be adjusted multiple times so that its first overlapping lug 301 is always located directly above the support side 1002. In this way, the first overlapping lug 301 can be folded and attached to the support side 1002 of the flange 100. The movement of the retaining washer 300 is restricted by the side wall of the flange 100 (support side 1002). Combined with the second overlapping lug 302 attached to the side of the nut 200, the rotation of the nut 200 is restricted.

[0043] Please refer to the following: Figures 1 to 6 The nut stop washer limiting device 10 provided in this application embodiment is applicable, but not limited to, when overhauling equipment in a nuclear power plant, to limit the position of the stop washer 300 during the installation of bolts and nuts 200 onto valve flanges 100, so that the stop washer 300 cannot rotate with the nut 200.

[0044] like Figures 3 to 6 As shown, this application provides a limiting device 10 for a nut stop washer, which is suitable for limiting the position of the stop washer 300 during the tightening process of the nut 200.

[0045] In the embodiments of this application, such as Figures 3 to 5As shown, the limiting device 10 for the nut stop washer includes a first limiting rod 11, a second limiting rod 12, and a locking assembly 13. The first limiting rod 11 has a first positioning part 111, which is adapted to abut against one of two adjacent nuts 200 installed on the equipment. The second limiting rod 12 is movably connected to the first limiting rod 11 and has a second positioning part 121, which is set at an angle to the first positioning part 111 and is used to abut against the stop washer 300 corresponding to the other of the two adjacent nuts 200. The second limiting rod 12 is connected to the first limiting rod 11 through the locking assembly 13. When the locking assembly 13 is in the locked state, the second limiting rod 12 is locked to the first limiting rod 11. When the locking assembly 13 is in the unlocked state, the second limiting rod 12 can move relative to the first limiting rod 11.

[0046] In this embodiment, when bolts are installed on the equipment, the locking washer 300 rotates with the nut 200 when it is tightened, causing the first overlapping lug 301 to misalign. The position of the locking washer 300 needs to be repeatedly adjusted so that the first overlapping lug 301 can always overlap with a specific surface of the equipment, thereby effectively preventing the corresponding nut 200 from loosening. For example, when the nut 200 is installed on the flange 100, the first overlapping lug 301 of the locking washer 300 is folded and fitted to the radially outer side wall 201 or inner side wall 201 of the flange 100 (as shown by the support side 1002 in the figure), thus restricting the movement of the locking washer 300 through the flange 100. Based on this, the limiting device 10 of this application limits the stop washer 300 during the tightening of the nut 200, preventing it from rotating with the nut 200. This ensures that the first lap ear 301 of the stop washer 300 can always remain above the inner side wall 201 or the outer side wall 201 of the flange 100. After folding, it can fit against the corresponding side wall 201. The position of the stop washer 300 does not need to be adjusted multiple times during the tightening process, thus improving the installation efficiency of the nut 200.

[0047] Understandably, the limiting device 10 includes a first limiting rod 11. The first limiting rod 11, as the core structure of the limiting device 10, provides a fixed reference for the entire device. It includes a first positioning part 111, which is adapted to abut against one of two adjacent nuts 200. Typically, one of the two adjacent nuts 200 is already installed (or in a relatively fixed state) and can serve as the reference nut 200. By abutting against this reference nut 200, the first positioning part 111 fixes the first limiting rod 11 in a stable reference position, preventing displacement of the entire limiting device 10. The first positioning part 111 abuts against the nut 200, and can abut against the side wall 201 of the nut 200.

[0048] The limiting device 10 also includes a second limiting rod 12, which is used to directly constrain the stop pad 300. Specifically, the second limiting rod 12 has a second positioning part 121, and the second positioning part 121 is set at an angle to the first positioning part 111. The second limiting rod 12 is movably connected to the first limiting rod 11, and the two are movably connected and the relative positional relationship (such as angle, interval distance, etc.) between the first positioning part 111 and the second positioning part 121 can be adjusted by adjusting the connection relationship between the two, thereby adapting to different usage scenarios. The second positioning part 121 is used to abut against the stop washer 300 corresponding to the other nut 200 among two adjacent nuts 200. The other nut 200 is the target nut 200 that is currently being tightened (the nut 200 to be installed). By abutting the second positioning part 121 against the stop washer 300 corresponding to the nut 200 to be tightened, the rotation of the stop washer 300 with the target nut 200 can be directly restricted. When the target nut 200 is tightened, the stop washer 300 cannot rotate because it is abutted by the second positioning part 121, thereby ensuring that the position of the stop washer 300 does not shift, so that the first lap ear 301 of the stop washer 300 is always opposite to the corresponding surface of the equipment (such as the side of the flange 100).

[0049] The limiting device 10 also includes a locking assembly 13, which is used to fix the limiting posture of the second limiting rod 12. The locking assembly 13 connects the first limiting rod 11 and the second limiting rod 12, realizing the switching between locking and unlocking states. When the locking assembly 13 is in the locked state, the second limiting rod 12 is fixed on the first limiting rod 11. At this time, the abutment force of the second positioning part 121 against the stop washer 300 is stable, ensuring reliable limiting. When the locking assembly 13 is in the unlocked state, the second limiting rod 12 can move relative to the first limiting rod 11 (such as adjusting its position or angle) to adapt to different specifications of nuts 200, stop washers 300, or the spacing between adjacent nuts 200, improving the versatility of the device.

[0050] Understandably, in specific embodiments, the locking component 13 may be a threaded locking structure, a pin / key locking structure, a clamping locking structure, or a snap / claw locking structure, etc.

[0051] The limiting device 10 for the nut locking washer in this embodiment of the application, such as Figure 6As shown, in use, the limiting device 10 is placed beside the installation position of the nut 200. For example, when the nut 200 is installed on the flange 100, the limiting device 10 is placed beside the inner or outer sidewall 201 of the flange 100 along the radial direction. The first positioning part 111 is moved to abut against another nut 200 beside the nut 200 to be tightened. Then, the locking assembly 13 is adjusted to make the second limiting rod 12 in the unlocked state. Force is applied to adjust the connection state between the second limiting rod 12 and the first limiting rod 11, so that the second positioning part 121 moves to abut against the stop washer 300 of the nut 200 to be tightened. Then, the locking assembly 13 is adjusted to lock the second limiting rod 12. With the first limiting rod 11 in place, the second limiting rod 12 can no longer move relative to the first limiting rod 11. In this way, the first limiting rod 11, the second limiting rod 12, and the adjacent nut 200 provide support for the stop washer 300 of the nut 200 to be tightened. With the adjacent nut 200 as a reference, the stop washer 300 is directly constrained by the cooperation of the first positioning part 111 and the second positioning part 121. This effectively restricts the rotation of the stop washer 300 during the tightening process of the nut 200, thereby eliminating the need to repeatedly adjust the position of the stop washer 300, effectively improving the bolt installation efficiency, reducing the time that workers spend on the nuclear island, and reducing the radiation risk.

[0052] It should be noted that, in the embodiments of this application, please refer to... Figure 1 and Figure 2 The first lap ear 301 refers to the ear structure of the retaining washer 300 for fitting and conforming to the side of the device, such as the flange 100, adjacent to the mounting surface 1001 of the mounting nut 200.

[0053] In some embodiments, such as Figures 3 to 5 As shown, the locking assembly 13 includes a connector 131 and a first locking member 132. The connector 131 is rotatably connected to the first limiting rod 11 along the radial direction. The connector 131 has a first connecting portion 1311 protruding from one side of the first limiting rod 11 along the radial direction. The second limiting rod 12 is connected to the first connecting portion 1311. The connector 131 also has a second connecting portion 1312 extending to the opposite side of the first limiting rod 11. The first locking member 132 is rotatably connected to the second connecting portion 1312. The first locking member 132 can cooperate with the first connecting portion 1311 to clamp or release the first limiting rod 11, thereby locking the second limiting rod 12 to the first limiting rod 11, or allowing the second limiting rod 12 to rotate relative to the first limiting rod 11.

[0054] In this embodiment, the first limiting rod 11 and the second limiting rod 12 are connected by a connector 131 to form a lever structure. The connector 131 rotates relative to the first limiting rod 11 with the radial direction of the first limiting rod 11 as the axis and provides a basis for adjusting the angle of the second limiting rod 12. The first locking member 132 cooperates with the first connecting part 1311 to lock and unlock the second limiting rod 12.

[0055] In use, when the first locking member 132 does not cooperate with the first connecting part 1311 to clamp the first limiting rod 11, there is a gap between the first locking member 132 and the first connecting part 1311, and no clamping force is generated on the first limiting rod 11. The second limiting rod 12 is in the unlocked state, and the connecting member 131 can rotate relative to the first limiting rod 11, driving the second limiting rod 12 to adjust the angle, so that the second positioning part 121 is aligned with the target stop pad 300. When the first locking member 132 is rotated, it rotates around the axis of the second connecting part 1312 and moves to contact the first limiting rod 11, thereby cooperating with the first connecting part 1311 to clamp the first limiting rod 11. The clamping surfaces of the first connecting part 1311 and the first locking member 132 are in close contact with the surface of the first limiting rod 11, and the frictional resistance prevents the connecting member 131 from rotating, thereby locking the second limiting rod 12 to the first limiting rod 11, so that the first positioning part 111 and the second positioning part 121 remain in a fixed position without change. It can be understood that the first locking member 132 can be a locking nut, such as a thumb knob.

[0056] In a specific embodiment, such as Figures 3 to 5 As shown, the first limiting rod 11 is provided with a first threaded hole 112, the first connecting part 1311 is provided with an external thread that matches the internal thread of the first threaded hole 112, the first connecting part 1311 is screwed into the first threaded hole 112, and the first locking member 132 is a locking nut, which is screwed into the first connecting part 1311.

[0057] In this embodiment, a first threaded hole 112 is provided on the first limiting rod 11, and the first connecting part 1311 has an external thread that is adapted to it. Through the cooperation of the internal and external threads, the first connecting part 1311 can be screwed into the first threaded hole 112. In this way, by adopting a threaded connection structure, the first connecting part 1311 can be stably installed on the first limiting rod 11, and the position of the first connecting part 1311 in the first threaded hole 112 can be adjusted according to actual needs to adapt to different usage scenarios. The structure is simple, flexible in use, and easy to operate.

[0058] Furthermore, the first locking element 132 is a locking nut, which is screwed onto the first connecting part 1311. When it is necessary to fix the second limiting rod 12, tightening the locking nut will exert pressure on the first connecting part 1311. Since the first connecting part 1311 and the first limiting rod 11 are connected by threads, this pressure will increase the friction between the first connecting part 1311 and the first limiting rod 11, thereby locking the second limiting rod 12 onto the first limiting rod 11 and preventing relative movement. Conversely, loosening the locking nut allows the second limiting rod 12 to rotate or move relative to the first limiting rod 11 for position adjustment and other operations.

[0059] In some embodiments, such as Figures 3 to 5 As shown, the second connecting part 1312 is provided with a second threaded hole 1313, the axis of the second threaded hole 1313 intersects with the rotation axis of the connecting part 131, and the second limiting rod 12 is provided with an external thread that matches the internal thread of the second threaded hole 1313. The second limiting rod 12 is screwed into the second threaded hole 1313.

[0060] In this embodiment, the second connecting part 1312 is provided with a second threaded hole 1313, and the second limiting rod 12 is provided with a matching external thread. The two are connected through the cooperation of the internal and external threads, so that the second limiting rod 12 can be stably installed on the second connecting part 1312, and it is also easy to disassemble and adjust. The axis of the second threaded hole 1313 intersects the rotation axis of the connecting part 131. After installation, the position and angle of the second limiting rod 12 can be adjusted according to actual needs. When the connecting part 131 rotates, since the second threaded hole 1313 intersects the rotation axis, the second limiting rod 12 can change its position and direction relative to the first limiting rod 11 within a certain range, so as to better adapt to different installation situations of nuts 200 and stop washers 300, and improve the versatility and flexibility of the limiting device 10.

[0061] Thus, by screwing the second limiting rod 12 into the second threaded hole 1313, the second limiting rod 12 can be adjusted to a suitable position according to the actual installation requirements, and then locked and fixed with the locking assembly 13, thereby achieving effective limiting of the stop washer 300, so that the stop washer 300 cannot rotate with the nut 200, thereby ensuring the bolt tightening and anti-loosening effect and improving the bolt installation efficiency.

[0062] In some embodiments, such as Figures 3 to 5 As shown, the second positioning part 121 is provided at one end of the second limiting rod 12 along the length direction, and the other end of the second limiting rod 12 along the length direction passes through the second threaded hole 1313; the locking assembly 13 also includes a second locking member 133, which is a locking nut, and the second locking member 133 is screwed to one end of the second limiting rod 12 away from the second positioning part 121.

[0063] In this embodiment, the second positioning part 121 is disposed at one end of the second limiting rod 12 along its length and is used to abut against the stop washer 300 to achieve the limiting function. The other end of the second limiting rod 12 extends out from the second threaded hole 1313 to serve as the operating end for adjusting and locking the second limiting rod 12. This facilitates adjusting the extension length of the second limiting rod 12 through threaded engagement, thereby precisely controlling the abutment position and force between the second positioning part 121 and the stop washer 300.

[0064] Based on this, the locking assembly 13 also includes a second locking member 133, which is a locking nut and is screwed to one end of the second limiting rod 12 away from the second positioning part 121. When the second limiting rod 12 is adjusted to a suitable position through threaded engagement (i.e., the second positioning part 121 and the stop washer 300 are reliably abutted), the second locking member 133 is tightened so that it is tightly fitted to the surface of the second connecting part 1312. At this time, the frictional force generated between the second locking member 133 and the second connecting part 1312 will restrict the autonomous rotation or displacement of the second limiting rod 12, thereby fixing the position of the second limiting rod 12 and ensuring that the limiting effect of the second positioning part 121 on the stop washer 300 is stable and reliable.

[0065] Thus, in this embodiment, the length adjustment is achieved by the threaded engagement of the second limiting rod 12 with the second threaded hole 1313, and the adjusted position is fixed by the locking of the second locking member 133. This ensures that the second positioning part 121 can adapt to the position requirements of the stop washer 300 under different installation scenarios, and also avoids the second limiting rod 12 from shifting due to vibration or force during the tightening of the nut 200. This continuously and stably limits the stop washer 300, ensuring that the stop washer 300 can effectively prevent the corresponding nut 200 from loosening, thereby helping to improve the installation efficiency and reliability of the bolt.

[0066] In some embodiments, such as Figures 3 to 5 As shown, the first positioning part 111 is provided at one end of the first limiting rod 11 along the length direction, and the other end of the first limiting rod 11 along the length direction is provided with a handle part 113. The connecting member 131 is provided between the first positioning part 111 and the handle part 113. Along the length direction of the first limiting rod 11, the interval between the connecting member 131 and the handle part 113 is greater than the interval between the connecting member 131 and the first positioning part 111.

[0067] In this embodiment, the first limiting rod 11 is divided into three key parts along its length, each with a clearly defined function. The first positioning part 111 is located at one end of the first limiting rod 11 along its length and is a functional part that directly abuts against the target stop pad 300 to limit its displacement or rotation. The handle part 113 is located at the other end of the first limiting rod 11 and is a part for the operator to hold or apply force to, so as to facilitate manual movement of the first limiting rod 11 to adjust its overall position. The connecting member 131 is installed between the first positioning part 111 and the handle part 113 and is rotatably connected to the first limiting rod 11 on the side of the first positioning part 111.

[0068] Based on this, along the length of the first limiting rod 11, the distance between the connector 131 and the handle 113 is greater than the distance between the connector 131 and the first positioning part 111. That is, the connector 131 is closer to the first positioning part 111 and farther from the handle 113, resulting in a more reasonable distribution of the lever arm. A small rotation can drive the first positioning part 111 to produce effective displacement. The connector 131 being farther away from the handle 113 reduces interference between the connector 131 and the operator's hand or the operating space of the handle 113, ensuring that the rotation of the handle 113 is not obstructed by the connector 131, thus improving the smoothness of operation. The first positioning part 111 is the core position of the limiting function. The connector 131 being closer to this position can shorten the force transmission path, reduce structural deformation or loosening caused by the excessive distance between the connector 131 and the positioning part, and improve the overall stability of the limiting function.

[0069] In some embodiments, the first limiting rod 11 is a metal rod, and the handle portion 113 is a rubber portion provided on the first limiting rod 11.

[0070] Thus, the first limiting rod 11 is made of metal (such as steel, iron, aluminum alloy, etc.), utilizing the high strength, rigidity, wear resistance, and strong deformation resistance of metal materials to ensure its structural stability as a core support and limiting component. The handle 113, as the part directly contacted and operated by the operator, is made of rubber to improve the grip experience and thus enhance operational stability. Furthermore, rubber is an insulating material; in scenarios involving conductive environments (such as some industrial equipment), the insulation properties of rubber provide additional safety assurance.

[0071] In the first embodiment, the second limiting rod 12 is also a metal rod. As a key component that undertakes limiting, force transmission and structural support, the second limiting rod 12 is made of metal material (such as steel, iron, aluminum alloy, etc.) and has sufficient strength and rigidity to maintain its stable shape, thereby providing sufficient resistance force to limit the stop pad 300.

[0072] In some embodiments, such as Figures 3 to 5As shown, the second positioning part 121 is provided with at least one slot 1211, which is used for the first lap ear 301 of the stop pad 300 to be fitted into.

[0073] In this embodiment, at least one slot 1211 is provided on the second positioning part 121. The slot 1211 is a recessed or notched structure, and its shape and size need to be designed according to the shape and size of the first overlapping ear 301 of the stop washer 300 to ensure that the first overlapping ear 301 can be fitted and snapped in. Typically, the shape of the slot 1211 may be rectangular, trapezoidal, or other shapes suitable for snapping. The number of slots 1211 can be one or more to better fit the first overlapping ear 301. The first overlapping ear 301 of the stop washer 300 can be inserted precisely into the slot 1211 of the second positioning part 121. Through this snap-fit ​​engagement, the connection and positioning of the two are achieved.

[0074] When the first lap ear 301 of the stop washer 300 is engaged with the slot 1211, the stop washer 300 is fixed in a specific position by the engagement of the first lap ear 301 with the slot 1211. This restricts the movement or rotation of the stop washer 300 relative to the second positioning part 121, allowing it to better perform its stopping function, thereby restricting the movement of the nut 200 associated with the stop washer 300, i.e., preventing the nut 200 from loosening.

[0075] In some embodiments, such as Figures 3 to 5 As shown, the slot 1211 is a notch located at the end of the second positioning part 121 that is away from the first limiting rod 11.

[0076] In this embodiment, a slot 1211 is formed between the ends of the second positioning part 121, and the first overlapping ear 301 can be directly inserted laterally from the end edge of the first positioning part 111, which facilitates the quick insertion or removal of the first overlapping ear 301 of the stop pad 300, simplifying the operation process during assembly or adjustment.

[0077] In some embodiments, such as Figure 4 and Figure 5 As shown, the side of the first positioning part 111 facing away from the second positioning part 121 forms an abutment surface 1111, which is used to abut against the side wall 201 of the nut 200. The abutment surface 1111 is a concave arc surface.

[0078] The side of the first positioning part 111 is a concave arc surface, which serves as an abutment surface 1111 to abut against the side wall 201 of the nut 200, which serves as a limiting reference. Its curvature and radius of curvature can be designed to match the shape of the side wall 201 of the nut 200. For example, the side wall 201 of common nuts 200, such as hexagonal nuts 200 and round nuts 200, is mostly a rounded transition or a cylindrical outer periphery. The curvature of the concave arc surface can match the outer arc of the side wall 201 of the nut 200, forming a close contact. Compared with the line contact (or point contact) between the plane and the side wall 201 of the nut 200, the concave arc surface can form a larger contact area with the arc-shaped side wall 201 of the nut 200, dispersing the abutment force and avoiding excessive local stress that could cause deformation of the nut 200 or the first positioning part 111.

[0079] In the specific embodiments, please refer to the following: Figures 3 to 6 When using the limiting device 10 of the nut locking washer according to the embodiments of this application, the operation can be performed by referring to the following steps:

[0080] 1. Initial positioning: Move the abutting surface 1111 of the first positioning part 111 of the first limiting rod 11 to the side wall 201 of the installed nut 200 adjacent to the nut 200 to be tightened, and then move the second positioning part 121 of the second limiting rod 12 toward the stop washer 300 corresponding to the nut 200 to be tightened.

[0081] 2. Angle adjustment: Rotate the connector 131 so that the second positioning part 121 is aligned with the first overlapping ear 301 of the stop washer 300 of the nut 200 to be tightened, and the first overlapping ear 301 is inserted into the slot 1211;

[0082] 3. Locking and fixing: Rotate the first locking member 132, and lock the position of the connector 131 by lever force increase and mechanical clamping, so as to ensure that the second limit rod 12 no longer moves, thereby continuously abutting the first lap ear 301 of the stop pad 300.

[0083] 4. Tightening nut 200: Tighten nut 200 with a torque wrench. During this process, the stop washer 300 cannot rotate because it is fixed by the limiting device 10, and the first lap ear 301 always remains in the correct position.

[0084] 5. Device disassembly: Loosen the first locking part 132, remove the limiting device 10, and complete the installation of a single bolt.

[0085] 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.

[0086] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A limiting device for a nut locking washer, used to limit the locking washer during nut installation, characterized in that, The limiting device includes: The first limiting rod has a first positioning part, which is adapted to abut against one of two adjacent nuts installed on the equipment; A second limiting rod is movably connected to the first limiting rod. The second limiting rod has a second positioning part, which is angled with the first positioning part and is used to abut against the stop washer corresponding to the other of the two adjacent nuts; and A locking assembly is provided, wherein the second limiting rod is connected to the first limiting rod via the locking assembly. When the locking assembly is in the locked state, the second limiting rod is locked to the first limiting rod. When the locking assembly is in the unlocked state, the second limiting rod can move relative to the first limiting rod.

2. The limiting device for the nut locking washer as described in claim 1, characterized in that, The locking assembly includes a connector and a first locking member. The connector is rotatably connected to the first limiting rod along the radial direction. The connector has a first connecting portion protruding from one side of the first limiting rod along the radial direction. The second limiting rod is connected to the first connecting portion. The connector also has a second connecting portion extending to the opposite side of the first limiting rod. The first locking member is rotatably connected to the second connecting portion. The first locking member can cooperate with the first connecting part to clamp or release the first limiting rod, thereby locking the second limiting rod to the first limiting rod, or allowing the second limiting rod to rotate relative to the first limiting rod.

3. The limiting device for the nut locking washer as described in claim 2, characterized in that, The first limiting rod is provided with a first threaded hole, the first connecting part is provided with an external thread that matches the internal thread of the first threaded hole, the first connecting part is screwed into the first threaded hole, and the first locking member is a locking nut, which is screwed into the first connecting part.

4. The limiting device for the nut locking washer as described in claim 2, characterized in that, The second connecting part is provided with a second threaded hole, the axis of the second threaded hole intersects with the rotation axis of the connecting member, the second limiting rod is provided with an external thread that matches the internal thread of the second threaded hole, and the second limiting rod is screwed into the second threaded hole.

5. The limiting device for the nut locking washer as described in claim 4, characterized in that, The second positioning part is located at one end of the second limiting rod along the length direction, and the other end of the second limiting rod along the length direction passes through the second threaded hole; The locking assembly further includes a second locking member, which is a locking nut, and is screwed to one end of the second limiting rod away from the second positioning part.

6. The limiting device for the nut locking washer as described in claim 2, characterized in that, The first positioning part is located at one end of the first limiting rod along the length direction, and the other end of the first limiting rod along the length direction is provided with a handle. The connecting member is located between the first positioning part and the handle. Along the length direction of the first limiting rod, the distance between the connecting member and the handle is greater than the distance between the connecting member and the first positioning part.

7. The limiting device for the nut locking washer as described in claim 6, characterized in that, The first limiting rod is a metal rod, the handle is a rubber part provided on the first limiting rod, and / or the second limiting rod is a metal rod.

8. The limiting device for the nut locking washer as described in any one of claims 1 to 7, characterized in that, The second positioning part is provided with at least one slot, which is used for the first overlapping ear of the stop pad to be fitted into.

9. The limiting device for the nut locking washer as described in claim 8, characterized in that, The slot is a notch located at the end of the second positioning part that is opposite to the first limiting rod.

10. The limiting device for the nut locking washer as described in any one of claims 1 to 7, characterized in that, The side of the first positioning part facing away from the second positioning part forms an abutment surface, which is used to abut against the side wall of the nut, and the abutment surface is a concave arc surface.

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