Ear dismounting device for nut anti-loosening limiting member

Abstract

The utility model belongs to the field of nuclear power overhauling technology, more specifically, relate to a kind of ear detachment device of nut anti-loose limiting piece's ear, it includes clamping piece, shovel ear and elastic piece, clamping piece includes driving handle and clamping part, clamping part can be from the side of nut clamping nut, driving handle is used to drive clamping piece rotation around the center line of clamping space;Shovel ear is connected to clamping part and is located outside clamping space, the head of shovel ear is flat to be used to extend between the side wall of nut and ear;Shovel ear is torsionally connected with clamping part by elastic piece, when clamping part is used to clamp nut, the head of shovel ear can be abutted on the side wall of nut under the action of elastic force of elastic piece. When using, hold driving handle and drive clamping piece rotation around the axis of nut, make the head of shovel ear move and insert between ear and the side wall of nut, so, ear can be shovelled, to realize the efficient detachment of the ear of nut anti-loose limiting piece, improve the detachment efficiency of nut.

Description

Technical Field

[0001] This application belongs to the field of nuclear power plant maintenance technology, and more specifically, it relates to a lug removal device for a nut anti-loosening limiting component. Background Technology

[0002] 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.

[0003] In related technologies, locking devices such as washers are commonly used to limit the rotation of nuts. These locking devices typically have a first overlapping lug and a second overlapping lug. The first overlapping lug fits against the surface of the equipment where the nut is installed to restrict the movement of the washer, while the second overlapping lug fits against the side of the nut to cooperate with the first overlapping lug on the equipment surface to limit the nut's rotation. During maintenance and disassembly of the nut, the second overlapping lug, which overlaps the side wall of the nut, must first be lifted and detached from the side wall of the nut before the nut can be rotated and removed smoothly.

[0004] During the maintenance of valves in the nuclear island and conventional island, a flathead screwdriver is often used to pry the second lap lug off the side wall of the nut, thus detaching it and removing the nut. This process is cumbersome, requires significant manpower and time, and is difficult to control precisely. It can easily scratch delicate surfaces of the equipment, damage surface structures such as anti-corrosion coatings, reduce structural strength, affect overall performance and lifespan, and in severe cases, even directly damage the equipment, hindering normal repair procedures and significantly impacting maintenance progress in time-sensitive emergency repair scenarios. Utility Model Content

[0005] The purpose of this application is to provide a nut anti-loosening limit member ear removal device, which aims to improve the efficiency of nut removal during maintenance and reduce the risk of nut loosening.

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

[0007] A lug removal device is provided for a nut anti-loosening limiting member, used to lift the lug of the nut anti-loosening limiting member and press it against the side wall of the nut to disengage it. The lug removal device includes:

[0008] The clamping member includes a drive handle and a clamping part disposed at one end of the drive handle. The clamping part has a clamping space for inserting a nut to be removed so that the clamping part can clamp the nut from the side of the nut. The drive handle is used to drive the clamping member to rotate about the center line of the clamping space.

[0009] The shovel ear is connected to the clamping part and located outside the clamping space. The shovel ear has a head away from the clamping part. The head is flat and is used to extend between the side wall of the nut and the ear part.

[0010] The elastic element and the spatula ear are torsionally connected to the clamping part and can be torsion relative to the clamping part;

[0011] When the clamping part is used to clamp the nut, the head of the shovel ear can abut against the side wall of the nut under the elastic force of the elastic element.

[0012] In some embodiments, with the center line direction of the vertical clamping space as the thickness direction, the thickness of the scoop gradually increases from the head of the scoop towards the scoop connecting clamping part.

[0013] In some embodiments, the side of the shovel ear facing the clamping space is a convex arc surface, wherein when the clamping part is used to clamp the nut, the very end of the head of the shovel ear abuts against the side wall of the nut.

[0014] In some embodiments, the side of the shovel ear facing away from the clamping space is a concave arc surface.

[0015] In some embodiments, the ear removal device further includes a fixing seat located outside the clamping space. The fixing seat is connected to the clamping seat and has a connecting shaft arranged parallel to the center line of the clamping space. The ear clip is sleeved on the connecting shaft and rotatably connected to the fixing seat.

[0016] In some embodiments, the elastic element is a torsion spring, which is sleeved on the connecting shaft, and one elastic arm of the torsion spring is connected to the fixed seat, while the other elastic arm of the torsion spring is connected to the shovel lug.

[0017] In some embodiments, along the direction of the center line of the vertical clamping space, the inner side of the clamping part facing the clamping space has a first concave arc surface and a second concave arc surface disposed opposite to each other, and the clamping space is located between the first concave arc surface and the second concave arc surface.

[0018] In some embodiments, the clamping part includes a first half and a second half, the clamping space is located between the first half and the second half, the drive handle is driven to at least one of the first half and the second half, the drive handle is used to drive the first half and the second half to move closer to each other or further away from each other, and the shovel ear is connected to the first half or the second half.

[0019] In some embodiments, the ear removal device further includes a first guide and a second guide, the first guide being disposed on the side wall of the first half facing the second half, and the second guide being disposed on the side wall of the second half facing the first half and spaced apart from the first guide.

[0020] The first guide member has a first guide surface, and the second guide member has a second guide surface. Both the first and second guide surfaces are cylindrical surfaces, and the clamping space is located between the first and second guide surfaces.

[0021] In some embodiments, the clamping device is a water pump clamp.

[0022] The ear removal device provided in this application is suitable for lifting and pressing the ear of a nut anti-loosening limiting member against the side wall of the nut. The beneficial effect of this ear removal device is that, in use, the drive handle is held to move the clamping member, the nut to be removed is put into the clamping space of the clamping member, force is applied to the drive handle to keep the clamping member holding the nut, the position of the clamping member is adjusted so that the head of the ear connected to the clamping member moves to abut against the side wall of the nut and approaches the ear from the side, that is, the head of the ear faces the fit gap between the ear and the side wall of the nut. After the position is adjusted, force is applied to the drive handle again, the drive handle drives the clamping member to rotate relative to the nut about the center line of the clamping space, that is, the axis of the nut, and moves the head of the ear towards the position close to the ear and inserts between the ear and the side wall of the nut. As the ear continues to move, the ear can be lifted and pressed against the side wall of the nut so that the ear is separated from the side wall of the nut. At this time, the limiting of the ear on the nut fails, and the nut can be smoothly and efficiently removed. Thus, the ear removal device of this application can achieve efficient removal of the ear of the nut anti-loosening limit member, which helps to improve the removal efficiency of the nut and thus improve the progress of maintenance. 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 schematic diagram of a structure in the related technology where the nut is installed on the surface of the valve's connecting flange and the second lap lug of the anti-loosening limiter is attached to the flange surface;

[0025] Figure 2 for Figure 1 The diagram shows a structure in which the second lap joint of the anti-loosening limiting member is folded to fit against the side wall of the nut.

[0026] Figure 3for Figure 2 A schematic diagram of the structure with the flange concealed.

[0027] Figure 4 This is a schematic diagram of the ear removal device provided in an embodiment of this application;

[0028] Figure 5 For use Figure 4 A view showing the state of the ear removal device;

[0029] Figure 6 for Figure 5 A cross-sectional view of the structure shown;

[0030] Figure 7 for Figure 4 Another perspective view of the ear removal device shown;

[0031] Figure 8 for Figure 4 A schematic diagram of the exploded structure of the ear removal device shown;

[0032] Figure 9 for Figure 4 A schematic diagram of the ear-scraper structure of the ear removal device shown;

[0033] Figure 10 for Figure 9 Another perspective view of the shovel ear shown.

[0034] The following are the labeling elements in the figure:

[0035] 100. Flange; 1001. Mounting surface;

[0036] 200. Nut; 201. Sidewall;

[0037] 300. Anti-loosening limiting component; 301. Ear; 3011. First overlapping ear; 3012. Second overlapping ear;

[0038] 10. Ear disassembly device; 11. Clamping component; 110. Drive handle; 111. Clamping part; 1111. First half; 1112. Second half; 112. Clamping space; 12. Shovel ear; 121. Head; 122. Convex arc surface; 123. Concave arc surface; 13. Elastic component; 14. Fixing base; 141. Connecting shaft; 15. First guide component; 151. First guide surface; 16. Second guide component; 161. Second guide surface. Detailed Implementation

[0039] 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 10The 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 scope of the present application.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] In related technologies, locking devices such as washers are commonly used to limit the rotation of nuts. These locking devices typically have a first overlapping lug and a second overlapping lug. The first overlapping lug fits against the surface of the equipment where the nut is installed to restrict the movement of the washer. The second overlapping lug fits against the side of the nut to cooperate with the first overlapping lug on the equipment surface to limit the nut's rotation. Before tightening the nut, the second overlapping lug is not fitted against the side of the nut to ensure that the nut can be rotated and tightened. After the nut is tightened, the second overlapping lug is folded over to fit against the side of the nut.

[0045] For example, such as Figure 1and Figure 2 As shown, taking the installation of nut 200 on valve flange 100 as an example, when installing nut 200, first insert the screw into flange 100, then put the anti-loosening limiting member 300 on the screw, and then put nut 200 on and tighten it. At this time, the anti-loosening limiting member 300 is subjected to the compressive force of nut 200, causing the second lap lug 3012 to abut against the surface of flange 100 facing nut 200, i.e., mounting surface 1001. Subsequently... Apply further force to fold the first overlapping lug 3011 of the anti-loosening limiting member 300 downwards and press it against the side wall of the flange 100. Then, use a flat chisel to pry the second overlapping lug 3012 off the surface of the flange 100, so that the second overlapping lug 3012 is turned towards the side wall 201 of the nut 200. Finally, use a hammer or other tool to tap the side of the nut 200, so that the second overlapping lug 3012 is pressed against the side wall 201 of the nut 200. In this way, the first overlapping lug 3011 is pressed against the side wall of the flange 100, restricting the movement of the anti-loosening limiting member 300 through the side wall of the flange 100, and the second overlapping lug 3012 is pressed against the side of the nut 200, thereby restricting the rotation of the nut 200. Thus, for nuts 200 with anti-loosening limiting parts 300 for limiting, when disassembling, the second overlapping lug 3012 that overlaps the side wall of the nut 200 needs to be lifted up and detached from the side wall 201 of the nut 200 before the nut 200 can be rotated and disassembled smoothly.

[0046] During the maintenance of valves in the nuclear island and conventional island, a flathead screwdriver is often used to pry the second lap lug off the side wall of the nut, thus detaching it and removing the nut. This process is cumbersome, requires significant manpower and time, and is difficult to control precisely. It can easily scratch delicate surfaces of the equipment, damage surface structures such as anti-corrosion coatings, reduce structural strength, affect overall performance and lifespan, and in severe cases, even directly damage the equipment, hindering normal repair procedures and significantly impacting maintenance progress in time-sensitive emergency repair scenarios.

[0047] Based on this, this application provides a device for removing the ear of a nut anti-loosening limiting component to solve the above problems.

[0048] Please refer to the following: Figures 1 to 10 The lug removal device for the nut anti-loosening limiting member provided in this application embodiment is applicable, but not limited to, during the maintenance of equipment in a nuclear power plant. It is used to press the lug of the anti-loosening limiting member that is attached to the side wall of the nut and disengage it from the side wall of the nut, thereby causing the limiting function of the anti-loosening limiting member to fail and the nut to be disassembled by normal rotation. For example, when the nut is installed on the flange of a valve, the second overlapping lug of the anti-loosening limiting member is attached to the side wall of the nut. When disassembling the nut, the lug removal device provided in this application embodiment can be used to remove the second overlapping lug from the side wall of the nut.

[0049] In the embodiments of this application, such as Figures 3 to 10 As shown in the figure, the direction indicated by arrow F is the extension direction of the center line of the clamping space. When the nut is inserted into the clamping space, the direction indicated by arrow F is the axial direction of the nut.

[0050] In the embodiments of this application, such as Figures 3 to 6 As shown, a nut anti-loosening limiting member ear removal device is provided, which is suitable for scraping up the ear of the nut anti-loosening limiting member and pressing it against the side wall of the nut. The ear removal device 10 includes a clamping member 11, a scraper ear 12, and an elastic space. The clamping member 11 includes a drive handle 110 and a clamping part 111 provided at one end of the drive handle 110. The clamping part 111 has a clamping space 112 for inserting the nut 200 to be removed so that the clamping part 111 can clamp the nut 200 from the side of the nut 200. The drive handle 110 is used to drive the clamping member 11 to rotate about the center line of the clamping space 112. The scraper ear 12 is connected to the clamping part 111. The holding part 111 is located outside the clamping space 112. The shovel ear 12 has a head 121 away from the clamping part 111. The head 121 is flat and is used to extend between the side wall 201 and the ear part 301 of the nut 200. The shovel ear 12 is torsionally connected to the clamping part 111 through the elastic member 13 and can be torsion relative to the clamping part 111. When the clamping part 111 is used to clamp the nut 200, the head 121 of the shovel ear 12 can abut against the side wall 201 of the nut 200 under the elastic force of the elastic member 13.

[0051] In this embodiment, it can be understood that the ear removal device 10 has a scraper ear 12, which is elastically torsionally connected to the clamping portion 111 via an elastic member 13. The head 121 of the scraper ear 12, away from the clamping portion 111, can be held against the side wall 201 of the nut 200 under the elastic force of the elastic member 13. Figure 5 and Figure 6 As shown, when the clamping part 111 rotates around the nut 200, the head 121 of the scraper ear 12 moves along the side wall 201 of the nut 200. Based on this, the head 121 of the scraper ear 12 is flattened. This shape design allows the head 121 of the scraper ear 12 to be inserted into the assembly gap between the ear 301 and the side wall 201 of the nut 200 as the clamping part 111 moves. That is, the head 121 of the scraper ear 12 can increase its insertion length between the ear 301 and the side wall 201 of the nut 200 as the clamping part 111 rotates and moves, thereby scraping the ear 301 from the side wall 201 of the nut 200 and pressing the ear 301 until it is disengaged from the side wall 201 of the nut 200.

[0052] The scraper ear 12 is torsionally connected to the clamping part 111 via an elastic element 13, allowing the scraper ear 12 to rotate relative to the clamping part 111 around the centerline of the clamping space 112. Specifically, when the clamping part 111 is not clamping the nut 200, the head 121 of the scraper ear 12 remains facing inwards into the clamping space 112 under the elastic force of the elastic element 13. When the clamping part 111 clamps the nut 200, the nut 200 is inserted into the clamping space 112, and the nut 200 moves until its sidewall 201 is in contact with the head 121 of the scraper ear 12, thereby pushing the head 121 of the scraper ear 12 out of the clamping space 112. At this point, the scraper ear 12... Under the elastic force of the elastic element 13, it still tends to move towards the clamping space 112, so that its head 121 can abut against the side wall 201 of the nut 200 with a certain fitting force. Thus, the head 121 can adaptively maintain its fit with the side wall 201 of the nut 200 during the rotation of the clamping part 111 (at least before the head 121 is inserted between the side wall 201 of the nut 200 and the ear 301), so that it can be accurately inserted between the ear 301 and the assembly gap of the nut 200 without manual alignment, which greatly reduces the difficulty of operation and improves the disassembly efficiency of the ear 301.

[0053] In the embodiments of this application, it can be understood that when the nut 200 is inserted into the clamping space 112 and the clamping part 111 clamps the side wall 201 of the nut 200, the driving handle 110 for driving the clamping member 11 to rotate around the center line of the clamping space 112 means that the driving handle 110 drives the clamping member 11 to rotate relative to the nut 200, that is, at this time the nut 200 is stationary and the clamping member 11 rotates around the nut 200.

[0054] The ear removal device 10 of this application embodiment is suitable for lifting the ear 301 of the anti-loosening limiting member 300 of the nut 200 and pressing it against the side wall 201 of the nut 200 to disengage it. Please refer to it in conjunction with the following: Figure 3 and Figure 4When using the ear removal device 10, the driver holds the drive handle 110 to move the clamping member 11, inserts the nut 200 to be removed into the clamping space 112 of the clamping part 111, applies force to the drive handle 110 to keep the clamping part 111 holding the nut 200, adjusts the position of the clamping part 111 so that the head 121 of the scraper ear 12 connected to the clamping part 111 abuts against the side wall 201 of the nut 200 and moves to a position close to the ear 301 from the side wall 201, that is, the head 121 of the scraper ear 12 faces the fitting gap between the ear 301 and the side wall 201 of the nut 200. After the adjustment is completed, force is applied to the drive handle 110 again. The drive handle 110 drives the clamping member 11 to rotate relative to the nut 200 about the center line of the clamping space 112, i.e., the axis of the nut 200. This causes the head 121 of the scraper ear 12 to move towards the ear 301 and insert between the ear 301 and the side wall 201 of the nut 200. As the scraper ear 12 continues to move, it can scrape up the ear 301 and press it against the side wall 201 of the nut 200, at which point the ear 301 loses its limiting effect on the nut 200, thus enabling the smooth and efficient disassembly of the nut 200. In this way, the ear disassembly device 10 of this application can achieve efficient disassembly of the ear of the nut 200 anti-loosening limiting member 300, which helps to improve the disassembly efficiency of the nut 200 and thus improve the progress of maintenance.

[0055] It should be noted that, in the embodiments of this application, please refer to... Figures 1 to 3 Ear 301 refers to the second overlapping ear 3012 of the anti-loosening limiting member 300, which is adapted to fit and conform to the side wall 201 of the nut 200.

[0056] In some embodiments, such as Figures 6 to 8 As shown, with the center line of the vertical clamping space 112 as the thickness direction, the thickness of the shovel ear 12 gradually increases from the head 121 of the shovel ear 12 toward the clamping part 111 connected to the shovel ear 12.

[0057] When the nut 200 is inserted into the clamping space 112 of the clamping part 111, the direction perpendicular to the center line of the clamping space 112, which is also the direction perpendicular to the axis of the nut 200 and the radial direction of the nut 200, is the thickness direction. Starting from the farthest end of the head 121 of the ear 12 and moving towards the clamping part 111, the thickness of the ear 12 gradually increases. That is, in terms of shape and structure, the head 121 of the ear 12 is relatively thin, while the part near the clamping part 111 is thicker, and the ear 12 exhibits a wedge-shaped or trapezoidal shape. Thus, the thinner head 121 can easily extend between the side wall 201 and the ear 301 of the nut 200, making it easier to find the leverage point and perform the scooping operation. The gradual thickening towards the connecting clamping part 111 increases the strength and stability of the scoop ear 12, making it less prone to deformation or damage when forcefully scooping the ear 301 of the anti-loosening limit member 300 of the nut 200, ensuring the smooth progress of the disassembly work, and also improving the service life of the scoop ear 12.

[0058] In some embodiments, such as Figure 5 , Figure 6 and Figure 9 and Figure 10 As shown, the side of the shovel ear 12 facing the clamping space 112 is a convex arc surface 122, wherein when the clamping part 111 is used to clamp the nut 200, the end of the head 121 of the shovel ear 12 abuts against the side wall 201 of the nut 200.

[0059] Understandably, since the nut 200 is typically hexagonal or circular, its outer sidewall 201 has an arcuate profile. Designing the side of the snipe lug 12 facing the clamping space 112 as a convex arc surface 122 allows the head 121 of the snipe lug 12 to better fit against the sidewall 201 of the nut 200. Furthermore, the convex arc surface 122 design also guides the head 121 to move smoothly along the sidewall 201 of the nut 200 when the snipe lug 12 rotates relative to the clamping part 111, reducing the risk of jamming or slippage and ensuring a smooth snipe-lifting process.

[0060] Based on this, when the clamping part 111 clamps the nut 200, i.e., in the initial clamping state, the very end (i.e., the thinnest part) of the head 121 of the shovel ear 12 is precisely abutting against the side wall 201 of the nut 200, providing an entry point for the subsequent shoveling action. By rotating the clamping part 111 to move the abutting position, the shovel ear 12 can accurately wedge between the nut 200 and the ear 301 of the anti-loosening limiting member 300. Furthermore, the line contact between the shovel ear 12 and the side wall 201 of the nut 200 can effectively reduce the friction between the two and improve the rotational smoothness of the clamping part 111. In addition, since the point of force for the shovel ear 12 to shovel the ear 301 is located at the very end of its head 121, according to the lever principle, the longer the lever arm, the greater the torque generated. The distance from the very end of the head 121 to the rotation center of the shovel ear 12 is relatively long, so a larger shoveling torque can be generated under the same driving force. In this way, the shoveling force can be maximized by utilizing the lever principle.

[0061] In some embodiments, such as Figure 5 , Figure 6 and Figure 9 and Figure 10 As shown, the side of the shovel ear 12 facing away from the clamping space 112 is a concave arc surface 123.

[0062] In this embodiment, the side of the shovel ear 12 facing away from the clamping space 112, that is, the side of the shovel ear 12 away from the center line of the clamping space 112 (the side opposite to the convex arc surface 122 facing the clamping space 112), has an inwardly concave arc shape, with the concave direction pointing towards the inside of the clamping space 112. This design can reduce the amount of material used while ensuring the structural strength of the shovel ear 12, making the shovel ear 12 lighter overall. At the same time, the concave arc surface 123 cooperates with the convex arc surface 122 on the other side. During the process of the shovel ear 12 scooping up the ear part 301, the very end of the head 121 of the shovel ear 12 moves to abut against the ear part 301, thereby further improving the scooping force of the shovel ear 12.

[0063] In some embodiments, such as Figure 4 , Figure 6 and Figure 8 As shown, the ear removal device 10 also includes a fixing seat 14 located outside the clamping space 112. The fixing seat 14 is connected to the clamping seat. The fixing seat 14 has a connecting shaft 141 arranged parallel to the center line of the clamping space 112. The ear 12 is sleeved on the connecting shaft 141 and rotatably connected to the fixing seat 14.

[0064] In this embodiment, a fixing seat 14 is provided outside the clamping space 112 and is fixedly connected to the clamping part 111. The fixing seat 14 has a connecting shaft 141, which extends parallel to the center line of the clamping space 112. That is, the direction of the connecting shaft 141 is consistent with the center direction of the clamping nut 200. The scraper ear 12 is sleeved on the connecting shaft 141 and rotatably connected to the fixing seat 14. The scraper ear 12 can rotate around the connecting shaft 141. That is, when the clamping part 111 clamps the nut 200, the scraper ear 12 can be twisted around the connecting shaft 141 under the action of the elastic member 13, so that its head 121 can extend into the space between the side wall 201 and the ear 301 of the nut 200.

[0065] In a specific embodiment, the fixing seat 14 is connected to the clamping part 111. For example, the fixing seat 14 can be integrally formed with the clamping part 11, or the fixing seat 14 can be connected to the clamping part 11 by means of snap-fit, welding, fastening, etc.

[0066] In some embodiments, such as Figure 4 , Figure 6 and Figure 8 As shown, the elastic element 13 is a torsion spring, which is sleeved on the connecting shaft 141. One elastic arm of the torsion spring is connected to the fixed seat 14, and the other elastic arm of the torsion spring is connected to the shovel ear 12.

[0067] Understandably, a torsion spring is a mechanical part that works by utilizing elasticity. When a torque is applied around a rotation axis, it undergoes elastic deformation and generates a reaction torque, so that the head 121 of the shovel ear 12 can abut against the side wall 201 of the nut 200 under the action of the torque.

[0068] In this embodiment, a torsion spring is sleeved on a connecting shaft 141, which provides the axis for mounting and supporting the torsion spring. The spring is sleeved on the connecting shaft 141, and its two elastic arms are connected to a fixed base 14 and a shovel lug 12, respectively. One elastic arm is connected to the fixed base 14, fixing one end of the torsion spring to the fixed base 14, thus defining a reference point for the spring and providing a fixed support point for generating torque. The other elastic arm is connected to the shovel lug 12. When the shovel lug 12 rotates around the connecting shaft 141, it causes the torsion spring to undergo torsional deformation, generating a corresponding reaction force. When the shovel lug 12 is not inserted between the side wall 201 and the ear portion 301 of the nut 200, the shovel lug 12 can maintain its head 121 against the side wall 201 of the nut 200.

[0069] In some embodiments, such as Figure 4 , Figure 7 and Figure 8As shown, along the direction of the center line of the vertical clamping space 112, the inner side of the clamping part 111 facing the clamping space 112 has a first concave arc surface 123 and a second concave arc surface 123 arranged opposite to each other. The clamping space 112 is located between the first concave arc surface 123 and the second concave arc surface 123. The first concave arc surface 123 and the second concave arc surface 123 are used to cooperate with each other to clamp the nut 200 to be disassembled.

[0070] In this embodiment, the clamping part 111 has two opposing concave arc surfaces 123 on its inner side facing the clamping space 112, namely the first concave arc surface 123 and the second concave arc surface 123. The first concave arc surface 123 and the second concave arc surface 123 are arranged opposite each other, forming the clamping space 112 in the middle. In this way, since the nut 200 is usually a regular shape such as hexagonal or circular, the first concave arc surface 123 and the second concave arc surface 123 can be adapted to the shape of the nut 200 to be removed. When the nut 200 is placed in the clamping space 112, the two concave arc surfaces 123 will contact the nut 200 from opposite sides. While the clamping part 111 holds the nut 200, it can rotate smoothly relative to the nut 200, so that the scraper ear 12 can rotate synchronously and scrape up the ear 301.

[0071] In some embodiments, such as Figure 4 , Figure 6 and Figure 8 As shown, the clamping part 111 includes a first half 1111 and a second half 1112. The clamping space 112 is located between the first half 1111 and the second half 1112. The drive handle 110 is driven to at least one of the first half 1111 and the second half 1112. The drive handle 110 is used to drive the first half 1111 and the second half 1112 to move closer to each other or further away from each other. The shovel ear 12 is connected to the first half 1111 or the second half 1112.

[0072] In this embodiment, the clamping part 111 is divided into a first half 1111 and a second half 1112, and the clamping space 112 is located between the first half 1111 and the second half 1112. The first half 1111 and the second half 1112 can clamp the nut 200 from two opposite directions. The drive handle 110 is drivenly connected to at least one of the first half 1111 and the second half 1112. The drive handle 110 can transmit power to the first half 1111 or the second half 1112, or to both simultaneously, through some transmission method, such as gear transmission or linkage transmission, thereby driving the first half 1111 and the second half 1112 to move closer to or further away from each other. When it is necessary to clamp the nut 200, the first half 1111 and the second half 1112 are moved towards the middle by operating the drive handle 110, thereby reducing the clamping space 112 and clamping the nut 200; when it is necessary to release the nut 200, the first half 1111 and the second half 1112 are moved in opposite directions by operating the drive handle 110, thereby expanding the clamping space 112 and releasing the nut 200.

[0073] The scraper lug 12 is connected to either the first half 1111 or the second half 1112. The scraper lug 12 moves in coordination with the clamping part 111. When the clamping part 111 clamps or releases the nut 200 by the drive handle 110, the scraper lug 12 can also adjust its position accordingly. For example, when the clamping part 111 clamps the nut 200, the scraper lug 12 can be twisted around the connecting shaft 141 under the action of the elastic member 13, so that its head 121 extends between the side wall 201 and the ear 301 of the nut 200; and when the clamping part 111 releases the nut 200, the scraper lug 12 can also return to its initial position with the movement of the clamping part 111 for the next use.

[0074] In some embodiments, such as Figure 4 , Figure 7 and Figure 8 As shown, the ear removal device 10 also includes a first guide 15 and a second guide 16. The first guide 15 is disposed on the side wall 201 of the first half 1111 facing the second half 1112, and the second guide 16 is disposed on the side wall 201 of the second half 1112 facing the first half 1111 and spaced apart from the first guide 15. The first guide 15 has a first guide surface 151, and the second guide 16 has a second guide surface 161. Both the first guide surface 151 and the second guide surface 161 are cylindrical surfaces. The clamping space 112 is located between the first guide surface 151 and the second guide surface 161. The first guide surface 151 and the second guide surface 161 are used to cooperate with each other to clamp the nut 200 to be removed.

[0075] In this embodiment, a first guide member 15 and a second guide member 16 are connected to the inner sidewall 201 of the clamping part 111. The nut 200 is clamped between the first guide member 15 and the second guide member 16. Different nuts 200 can be adapted by replacing different guide members, thus improving the versatility of the device. Furthermore, the first guide surface 151 of the first guide member 15 and the second guide surface 161 of the second guide member 16 are both cylindrical surfaces. The cylindrical surfaces can fit snugly against the outer contour of the nut 200 (such as the arc transition surface of a cylindrical or hexagonal nut), reducing stress concentration during clamping and providing a smooth guide path.

[0076] In a specific embodiment, the clamping component 11 is a water pump clamp.

[0077] Understandably, pump pliers are a common clamping tool, consisting of a plier head and a handle. The plier head includes a fixed plier head and a movable plier head, which are connected by a hinge shaft and can be opened and closed relative to each other. The handle is usually a lever design, and the opening and closing of the handle drives the fixed plier head and the movable plier head to clamp or release objects. Some pump pliers also have a toothed or bolt adjustment structure, which can change the opening size of the plier head to accommodate workpieces of different sizes.

[0078] In this embodiment, the clamping member 11 is a water pump clamp, wherein the clamping head is the clamping part 111, the handle is the driving handle 110, the fixed clamping head is the first half 1111, and the movable clamping head is the second half 1112. The first guide member 15 and the second guide member 16 are respectively installed on the two opposite inner sidewalls of the fixed clamping head and the movable clamping head. During operation, an external force is applied through the handle, i.e. the driving handle 110, to drive the fixed clamping head and the movable clamping head, i.e. the first half 1111 and the second half 1112, to move relative to each other, thereby driving the first guide member 15 and the second guide member 16 to move relative to each other, so as to clamp or release the nut 200.

[0079] Thus, water pump pliers are a mature standard tool, and their direct use as clamping component 11 can reduce the structural design and manufacturing costs of the device without the need to redevelop a dedicated clamping structure. Furthermore, water pump pliers have a broad market application base, and operators are more likely to become familiar with their usage methods and can quickly get started without special training. This allows the ear removal device 10 of this embodiment to achieve the clamping function by utilizing the mature structure of a standard tool, combining the advantages of low cost, strong versatility, and strong clamping force. At the same time, through linkage with components such as the scraper ear 12, a complete ear 301 removal solution is formed, achieving efficient removal of the ear 301 of the anti-loosening limit component 300. Moreover, after the ear 301 is removed from the nut 200, the same clamping component 11 can be used directly to clamp and rotate the nut 200 for removal.

[0080] Of course, in other embodiments, the clamping member 11 can also be other components with clamping capabilities, such as vises, chucks such as two-jaw chucks or three-jaw chucks, hydraulic grippers or electric grippers, etc.

[0081] 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.

[0082] Understandably, by using the lug removal device for the nut anti-loosening limiting member provided in the embodiments of this application, the lug of the nut anti-loosening limiting member is pried up and pressed against the side wall of the nut, which has the following advantages compared with the traditional technique of using a flathead screwdriver to pry the lug off the side wall of the nut:

[0083] 1. Significantly Improved Safety: Using a flathead screwdriver to pry the lugs off the side of the nut is difficult to control, and the screwdriver tip can easily slip out of control and injure the operator, posing a high risk of injury. The lug removal device in this application eliminates the flathead screwdriver, employing a mechanical mechanism that combines the lugs with a clamping component, fundamentally reducing the probability of accidents and ensuring the safety of maintenance personnel.

[0084] 2. Effective Equipment Protection: Using a flathead screwdriver to pry the lug from the side wall of the nut is difficult to control precisely, easily scratching the delicate surfaces of the equipment, damaging the anti-corrosion coating, weakening structural strength, and reducing equipment performance and service life. The lug removal device in this application uses a pry bar to lift the lug against the side wall of the nut. The operating position is far from the equipment surface, greatly reducing the risk of scratching the equipment, effectively maintaining equipment integrity, and extending equipment lifespan.

[0085] 3. Significantly Improved Maintenance Efficiency: The method of using a flathead screwdriver to pry the lugs off the side wall of a nut is laborious and requires a large operating space, resulting in low maintenance efficiency. The lug removal device of this application, through a movable clamping member, adjusts the clamping space to accommodate different nuts. Simultaneously, a torsion spring ensures the lugs fit tightly against the nut, adapting to various contact surfaces. This improves tool versatility and ease of operation, greatly shortens disassembly time, significantly increases maintenance efficiency, and improves maintenance progress.

[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 device for removing the lug of a nut anti-loosening limiting member, used to lift the lug of the nut anti-loosening limiting member and press it against the side wall of the nut, characterized in that, The ear removal device includes: A clamping member includes a drive handle and a clamping portion disposed at one end of the drive handle. The clamping portion has a clamping space for inserting a nut to be removed so that the clamping portion can clamp the nut from the side of the nut. The drive handle is used to drive the clamping member to rotate about the center line of the clamping space. A shovel ear is connected to the clamping portion and located outside the clamping space. The shovel ear has a head away from the clamping portion. The head is flattened to extend between the side wall of the nut and the ear portion. An elastic element is provided, wherein the spatula ear is torsionally connected to the clamping part via the elastic element and is capable of twisting relative to the clamping part; When the clamping part is used to clamp the nut, the head of the shovel ear can abut against the side wall of the nut under the elastic force of the elastic member.

2. The ear removal device as described in claim 1, characterized in that, With the direction perpendicular to the center line of the clamping space as the thickness direction, the thickness of the shovel ear gradually increases from the head of the shovel ear towards the direction where the shovel ear connects to the clamping part.

3. The ear removal device as described in claim 1, characterized in that, The side of the shovel ear facing the clamping space is a convex arc surface, wherein when the clamping part is used to clamp the nut, the very end of the head of the shovel ear abuts against the side wall of the nut.

4. The ear removal device as described in claim 3, characterized in that, The side of the shovel ear facing away from the clamping space is a concave arc surface.

5. The ear removal device as described in claim 1, characterized in that, The ear removal device further includes a fixing seat located outside the clamping space. The fixing seat is connected to the clamping part. The fixing seat has a connecting shaft arranged parallel to the center line of the clamping space. The ear clip is sleeved on the connecting shaft and rotatably connected to the fixing seat.

6. The ear removal device as described in claim 5, characterized in that, The elastic element is a torsion spring, which is sleeved on the connecting shaft. One elastic arm of the torsion spring is connected to the fixed seat, and the other elastic arm of the torsion spring is connected to the shovel lug.

7. The ear removal device as described in any one of claims 1 to 6, characterized in that, Along the direction perpendicular to the center line of the clamping space, the inner side of the clamping part facing the clamping space has a first concave arc surface and a second concave arc surface disposed opposite to each other, and the clamping space is located between the first concave arc surface and the second concave arc surface.

8. The ear removal device as described in any one of claims 1 to 6, characterized in that, The clamping part includes a first half and a second half, the clamping space is located between the first half and the second half, the driving handle is driven to at least one of the first half and the second half, the driving handle is used to drive the first half and the second half to move closer to each other or further away from each other, and the shovel ear is connected to the first half or the second half.

9. The ear removal device as described in claim 8, characterized in that, The ear removal device further includes a first guide and a second guide. The first guide is disposed on the side wall of the first half facing the second half, and the second guide is disposed on the side wall of the second half facing the first half and is spaced apart from the first guide. The first guide member has a first guide surface, the second guide member has a second guide surface, both the first guide surface and the second guide surface are cylindrical surfaces, and the clamping space is located between the first guide surface and the second guide surface.

10. The ear removal device as described in claim 9, characterized in that, The clamping device is a water pump clamp.

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