Ear pressing device of nut anti-loose limiting piece

Abstract

The invention belongs to the technical field of nuclear power overhaul, and particularly relates to an ear pressing device of a nut anti-loose limiting piece, which comprises a mounting frame, a driving piece and a clamping assembly, the clamping assembly comprises a first clamping piece and a second clamping piece, the first clamping piece is provided with a first shovel part, and the second clamping piece is provided with a second shovel part; the head part of the first shovel part and the first clamping surface are spaced and are flat so as to shovel up the lug part attached to the mounting surface provided with the nut; and the driving shaft drives the first clamping piece and the second clamping piece to get close to each other so as to abut against the lug part to be attached to the side wall of the nut. Thus, the lug pressing device can be used for shoveling up the lug of the nut anti-loose limiting piece and pressing the lug to be attached to the side wall of the nut, the lug does not need to be knocked by tools such as a hammer in the operation process, the lug of the anti-loose limiting piece can be moved to be attached to the side face of the nut, the adverse effect caused by knocking can be avoided, and the working efficiency is improved. And the attaching tightness of the lug part and the nut can be improved, and the anti-loosening reliability is improved.

Description

Technical Field

[0001] The present application belongs to the field of nuclear power maintenance technology, and more specifically, relates to an ear clamping device for a nut anti-loosening limiter. Background Art

[0002] During routine maintenance of the nuclear and conventional islands, tightening and preventing valve bolts from loosening is crucial for ensuring safe and stable system operation. As critical equipment for controlling fluid media, valves are subject to complex stresses such as pressure, temperature, and vibration under various operating conditions, placing stringent demands on the reliability of bolted connections. Loose bolts can cause gaps in the valve body joints, leading to valve leakage.

[0003] In the related art, nuts are typically positioned by using anti-loosening stoppers, such as washers, to restrict nut rotation. These stoppers typically have a first lap ear and a second lap ear. The first lap ear adheres to the surface of the device on which the nut is mounted to restrict movement of the stopper, while the second lap ear adheres to the side of the nut to cooperate with the first lap ear adhered to the device surface to restrict nut rotation. Before the nut is tightened, the second lap ear is not attached to the side of the nut to ensure that the nut can be rotated and tightened. After the nut is tightened, the second lap ear is folded over to attach to the side of the nut.

[0004] During the actual installation process, when the nut is tightened, the nut squeezes the anti-loosening limit piece so that the second lap ear is against the surface of the equipment installation nut. In this case, it is necessary to first use a flat shovel or other tool to lift the second lap ear, and then use a hammer or other tool to knock the second lap ear to fit the side of the nut, so that the second lap ear can be moved to fit the side of the nut.

[0005] However, hammering has obvious drawbacks. For one thing, there's no quantitative standard for the force applied, relying entirely on the operator's experience and feel. This inevitably leads to damage to the equipment during operation due to improper force. Both the nut itself and other connected components are at risk of scratches and deformation due to improper hammering, which in turn affects the equipment's precision, sealing performance, and overall service life. Furthermore, hammering also makes it difficult to ensure that the second lap ear fits tightly against the side of the nut, reducing the effectiveness of the anti-loosening stopper. During long-term operation, the risk of the nut loosening due to vibration, pressure fluctuations, and other factors increases, affecting the normal operation of valves and other equipment. Summary of the Invention

[0006] The purpose of the embodiments of the present application is to provide an ear clamping device for a nut anti-loosening limiter, aiming to improve the assembly efficiency and assembly reliability risk of the nut anti-loosening limiter during maintenance.

[0007] To achieve the above objectives, the technical solution adopted in this application is:

[0008] Provided is an ear pressing device for a nut anti-loosening limiter, which is used to scoop up the ear of the nut anti-loosening limiter and press it until it fits against the side wall of the nut. The ear pressing device includes:

[0009] Mounting rack;

[0010] The driving member includes a main body and a driving shaft provided on the main body, and the mounting frame is connected to the main body;

[0011] The clamping assembly includes a first clamping member and a second clamping member installed on the mounting frame and spaced apart along a first direction, the first clamping member having a first clamping surface for clamping the ear portion of the anti-loosening limit member, an end portion of the first clamping member facing away from the mounting frame being provided with a first shovel portion, the first shovel portion being provided on a side where the first clamping surface is located and being located below the first clamping surface in a direction away from the mounting frame, a head portion of the first shovel portion being spaced apart from the first clamping surface and being flattened for scooping up the ear portion affixed to the mounting surface where the nut is installed, the second clamping member having a second clamping surface facing the first clamping surface, the second clamping surface being used to affix to a side wall of the nut facing away from the ear portion;

[0012] In which, at least one of the first clamping member and the second clamping member is movably connected to the mounting frame and can move along the first direction, and the drive shaft is connected to the clamping assembly and can drive the first clamping member and the second clamping member to approach or move away from each other along the first direction, so that the first clamping surface and the second clamping surface are close to or away from each other.

[0013] In some embodiments, a first arcuate groove is provided at the end of the first clamping surface facing away from the mounting frame, and a groove wall of the first arcuate groove facing away from the mounting frame forms a first shovel portion.

[0014] In some embodiments, the first clamping surface is a plane, and the first clamping surface is used to fit with the side plane of the nut.

[0015] In some embodiments, the first clamping member is rotatably connected to the mounting frame, the rotation axis of the first clamping member is perpendicular to the first direction and parallel to the first clamping surface, and the first clamping member can rotate relative to the mounting frame to adjust the angle of the first clamping surface facing the second clamping surface.

[0016] In some embodiments, the first clamping member further has a third clamping surface, the third clamping surface includes a first half-plane and a second half-plane that are arranged at an angle and connected to each other, the boundary line between the first half-plane and the second half-plane is parallel to the rotation axis of the first clamping member, the first half-plane and the second half-plane are respectively used to adapt and fit with two adjacent side planes of the nut, and the first clamping member can be rotated relative to the mounting frame so that the first clamping surface is opposite to the second clamping surface, or the third clamping surface is opposite to the second clamping surface;

[0017] A second shovel portion is also provided at the end of the first clamping member facing away from the mounting frame. The second shovel portion is provided on the side where the third clamping surface is located and is located below the third clamping surface in the direction away from the mounting frame. The head of the second shovel portion is spaced apart from the third clamping surface and is flat so as to scoop up the ear portion that is attached to the mounting surface where the nut is installed.

[0018] In some embodiments, the angle between the first half plane and the second half plane is 120°.

[0019] In some embodiments, the third clamping surface also includes at least one extension plane, the side of the first half plane facing away from the second half plane is connected to the extension plane, and / or the side of the second half plane facing away from the first half plane is connected to the extension plane, when the third clamping surface cooperates with the second clamping surface and is used to clamp the nut, the extension plane is parallel to the second clamping surface, and the end of the extension plane facing away from the mounting frame is provided with a second arc groove, and the groove wall of the second arc groove facing away from the mounting frame forms a second shovel portion.

[0020] In some embodiments, the second clamping member is rotatably connected to the mounting frame, the rotation axis of the second clamping member is perpendicular to the first direction and parallel to the second clamping surface, and the second clamping member can rotate relative to the mounting frame to adjust the angle of the second clamping surface facing the first clamping surface.

[0021] In some embodiments, the structure of the second clamping member is the same as that of the first clamping member.

[0022] In some embodiments, the ear pressing device further includes a transmission assembly, the transmission assembly including a push block and two sets of connecting rods with identical structures mounted on the mounting frame, the push block being connected to the drive shaft, and the two sets of connecting rods being respectively connected to the push block and located on both sides of the drive shaft along the first direction;

[0023] The first clamping member is installed on the end of one of the connecting rod groups away from the push block, and the second clamping member is installed on the end of the other connecting rod group away from the push block. The drive shaft drives the push block to perform reciprocating linear motion along the second direction, and is transmitted through the two connecting rod groups to drive the first clamping member and the second clamping member to approach or move away from each other along the first direction, and the second direction is perpendicular to the first direction.

[0024] The ear pressing device provided by the present application is suitable for scooping up the ear of the nut anti-loosening limiter and pressing it to fit the side wall of the nut. The beneficial effect of the ear pressing device is that: when in use, the driving member and the mounting frame are moved so that the first clamping member and the second clamping member are located on both sides of the nut along the radial direction of the nut, and the end face of the first clamping member facing away from the mounting frame and the end face of the second clamping member facing away from the mounting frame are moved to abut against the mounting surface on which the nut is installed, while the first direction is kept parallel to the radial direction of the nut, and the head of the first shovel is aligned with the ear of the anti-loosening limiter facing away from the nut. The first clamping member is driven by a driving shaft, and the second clamping member is aligned with a surface of the side wall of the nut facing away from the ear. The driving member is then started, and the driving member drives the first clamping member and the second clamping member to approach each other in a first direction, i.e., the radial direction of the nut, through its driving shaft. During the approaching process, the head of the first shovel portion of the first clamping member extends between the ear and the mounting surface and scoops up the ear, so that the end facing away from the nut is folded toward the side wall of the nut. As the first clamping member and the second clamping member continue to approach each other, the second clamping surface is attached to the side wall of the nut, and the first clamping member presses the ear until it is attached to the side wall of the nut. In this way, by using the ear pressing device, the ear of the nut anti-loosening limiter can be operated, the ear originally attached to the mounting surface on which the nut is installed is scooped up, and pressed against the side wall of the nut, thereby effectively fixing the nut anti-loosening limiter and preventing the nut from loosening. Without using a hammer or other tools to knock on the ear, the ear of the anti-loosening limit piece that is in contact with the side wall of the nut can be moved to be in contact with the side of the nut, thereby avoiding a series of adverse effects caused by knocking. At the same time, it can also improve the tightness of the fit between the ear of the anti-loosening limit piece and the side of the nut, improve the anti-loosening reliability of the nut, further reduce the risk of nut loosening caused by factors such as vibration and pressure fluctuations, and improve the normal operation of equipment such as valves that are fastened with nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a structural diagram of the related art in which a nut is installed on the surface of a connecting flange of a valve and a second overlapping ear of an anti-loosening limiter is attached to the flange surface;

[0027] Figure 2 for Figure 1 The structure shown is a schematic diagram of the structure in which the second overlapping ear of the anti-loosening limiter is folded to fit the side wall surface of the nut;

[0028] Figure 3 A schematic structural diagram of the ear pressing device provided in an embodiment of the present application;

[0029] Figure 4 for Figure 3 Another perspective view of the ear compression device shown;

[0030] Figure 5 for Figure 3 Schematic diagram of the exploded structure of the ear pressing device shown;

[0031] Figure 6 for Figure 3 A schematic structural diagram of the first clamping member of the ear pressing device shown;

[0032] Figure 7 for Figure 6 Another perspective view of the first clamping member is shown;

[0033] Figure 8 for Figure 3 The structure diagram of the transmission component of the ear pressing device and the assembly structure of the mounting frame is shown.

[0034] Among them, the reference numerals in the figures are:

[0035] 100, flange; 1001, mounting surface;

[0036] 200, nut; 201, side wall;

[0037] 300, anti-loosening limiter; 301, ear; 3011, first overlapping ear; 3012, second overlapping ear;

[0038] 10. Ear pressing device; 11. Mounting frame; 111. Clamping block; 12. Driving member; 121. Main body; 122. Driving shaft; 13. Clamping assembly; 131. First clamping member; 1311. First clamping surface; 1312. First shovel portion; 1313. First arc-shaped groove; 1314. Third clamping surface; 1314a. First half plane; 1314b. Second half plane; 1314c. Extension plane; 1 315. Second shovel portion; 1316. Second arcuate groove; 132. Second clamping member; 1321. Second clamping surface; 1322. Fourth clamping surface; 1323. Third shovel portion; 1324. Fourth shovel portion; 1325. Third arcuate groove; 1326. Fourth arcuate groove; 14. Transmission assembly; 141. Connecting rod group; 1411. First connecting rod; 1412. Second connecting rod; 1413. Auxiliary rod; 142. Push block. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following Figures 1 to 8It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0040] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0041] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0042] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, "multiple groups" means two or more groups, "multiple pieces" means two or more pieces, and "several" means one or more, unless otherwise clearly defined.

[0043] During routine maintenance of the nuclear and conventional islands, tightening and preventing valve bolts from loosening is crucial for ensuring safe and stable system operation. As critical equipment for controlling fluid media, valves are subject to complex stresses such as pressure, temperature, and vibration under various operating conditions, placing stringent demands on the reliability of bolted connections. Loose bolts can cause gaps in the valve body joints, leading to valve leakage.

[0044] In the related art, nuts are typically positioned by using anti-loosening stoppers, such as washers, to restrict nut rotation. These stoppers typically have a first lap ear and a second lap ear. The first lap ear adheres to the surface of the device on which the nut is mounted to restrict movement of the stopper, while the second lap ear adheres to the side of the nut to cooperate with the first lap ear adhered to the device surface to restrict nut rotation. Before the nut is tightened, the second lap ear is not attached to the side of the nut to ensure that the nut can be rotated and tightened. After the nut is tightened, the second lap ear is folded over to attach to the side of the nut.

[0045] During the actual installation process, when the nut is tightened, the nut squeezes the anti-loosening limit piece so that the second lap ear is against the surface of the equipment installation nut. In this case, it is necessary to first use a flat shovel or other tool to lift the second lap ear, and then use a hammer or other tool to knock the second lap ear to fit the side of the nut, so that the second lap ear can be moved to fit the side of the nut.

[0046] For example, Figure 1 and Figure 2 As shown, taking the installation of the nut 200 on the flange 100 of the valve as an example, when installing the nut 200, first insert the screw into the flange 100, then put the anti-loosening limit piece 300 on the screw, and then put the nut 200 in and tighten the nut 200 with force. At this time, the anti-loosening limit piece 300 is subjected to the squeezing force of the nut 200, so that the second lap ear 3012 is abutted against the surface of the flange 100 facing the nut 200, that is, the installation surface 1001, and then force is applied to fold the first lap ear 3011 of the gasket downward and abut it against the side wall of the flange 100, and then use a flat shovel to lift the second lap ear 3012 from the surface of the flange 100, so that the second lap ear 3012 is flipped toward the side wall 201 of the nut 200, and finally use a hammer or other tool to knock the second lap ear 3012 toward the side of the nut 200, so that the second lap ear 3012 fits to the side wall 201 of the nut 200. In this way, the first overlapping ear 3011 is attached to the side wall of the flange 100, limiting the movement of the anti-loosening limiter 300 through the side wall of the flange 100, and the second overlapping ear 3012 is attached to the side of the nut 200, thereby limiting the rotation of the nut 200.

[0047] However, the use of hammering in this assembly method has obvious drawbacks. On the one hand, there is no quantitative standard for the force applied during the hammering, and it relies entirely on the operator's experience and feel. This inevitably leads to damage to the equipment due to improper force during operation. Both the nut itself and other connected components are at risk of scratches and deformation due to improper hammering, which in turn affects the accuracy, sealing performance and overall service life of the equipment. On the other hand, hammering also makes it difficult to ensure that the second lap ear can maintain a close fit with the side of the nut, which reduces the gasket's anti-loosening effect. During the long-term operation of the equipment, the risk of the nut loosening due to factors such as vibration and pressure fluctuations increases, affecting the normal operation of equipment such as valves.

[0048] Based on this, an embodiment of the present application provides an ear clamping device for a nut anti-loosening limiter to solve the above-mentioned problem.

[0049] Please also refer to Figures 1 to 8The ear pressing device of the nut anti-loosening limiter provided in the embodiment of the present application is applicable to, but not limited to, the use of the anti-loosening limiter to press the ear of the anti-loosening limiter after the nut is installed on various equipment and devices during the maintenance of nuclear power plants so that the ear can fit against the side wall of the nut, thereby limiting the rotation of the nut. For example, when the nut is installed on the flange of a valve, the second overlapping ear of the anti-loosening limiter is fit against the side wall of the nut, so that the anti-loosening limiter can limit the rotation of the nut relative to the flange. In the embodiment of the present application, Figures 3 to 8 As shown in the figure, the direction indicated by the arrow F1 is the first direction, and the direction indicated by the arrow F2 is the second direction.

[0050] In the embodiments of this application, Figures 3 to 8 As shown, an ear pressing device for a nut anti-loosening limiter is provided, which is suitable for scooping up the ear of the nut anti-loosening limiter and pressing it until it fits against the side wall of the nut.

[0051] In the embodiments of this application, Figures 3 to 5 As shown, the ear pressing device 10 includes a mounting frame 11 and a driving member 12, the driving member 12 includes a main body 121 and a driving shaft 122 provided on the main body 121, and the mounting frame 11 is connected to the main body 121; the clamping assembly 13 includes a first clamping member 131 and a second clamping member 132 installed on the mounting frame 11 and spaced apart along a first direction, the first clamping member 131 has a first clamping surface 1311 for clamping the ear 301 of the anti-loosening limit member 300, and the end of the first clamping member 131 facing away from the mounting frame 11 is provided with a first shovel portion 1312, the first shovel portion 1312 is provided on the side where the first clamping surface 1311 is located and is located below the first clamping surface 1311 in the direction away from the mounting frame 11, and the first shovel portion 1312 is provided on the side where the first clamping surface 1311 is located. The head is spaced apart from the first clamping surface 1311 and is flat so as to scoop up the ear 301 that is attached to the mounting surface 1001 on which the nut 200 is mounted. The second clamping member 132 has a second clamping surface 1321 facing the first clamping surface 1311, and the second clamping surface 1321 is used to fit with the side wall 201 of the nut 200 that is away from the ear 301; wherein, at least one of the first clamping member 131 and the second clamping member 132 is movably connected to the mounting frame 11 and can move along the first direction, and the drive shaft 122 is connected to the clamping assembly 13 and can drive the first clamping member 131 and the second clamping member 132 to approach or move away from each other along the first direction, so that the first clamping surface 1311 and the second clamping surface 1321 are close to or away from each other.

[0052] In a specific embodiment, when the first clamping surface 1311 and the second clamping surface 1321 approach each other, the two cooperate to clamp the ear 301 and the nut 200 and press the ear 301 to fit the side wall 201 of the nut 200. When the first clamping surface 1311 and the second clamping surface 1321 move away from each other, the two loosen the ear 301 and the nut 200.

[0053] In this embodiment, it is understood that the first clamping member 131 is provided with a first scooping portion 1312. The head of the first scooping portion 1312 is spaced apart from the first clamping surface 1311 and is flat. This shape design enables the head of the first scooping portion 1312 to be inserted under the ear portion 301 abutting against the mounting surface 1001, thereby scooping up the ear portion 301. The second clamping member 132 has a second clamping surface 1321 facing the first clamping surface 1311, which is configured to abut against the sidewall 201 of the nut 200 facing away from the ear portion 301. During the operation, the first shovel portion 1312 cooperates with the first clamping surface 1311 to first scoop up the ear 301 by the first shovel portion 1312, and then further fix the ear 301 by the first clamping surface 1311, and then the first clamping surface 1311 and the second clamping surface 1321 are brought close to each other to clamp the ear 301 of the nut anti-loosening limiter and the nut 200 in the middle, and make the ear 301 fit against the side wall 201 of the nut 200, and press the ear 301 until it fits against the side wall 201 of the nut 200.

[0054] At least one of the first clamping member 131 and the second clamping member 132 is movably connected to the mounting frame 11 and is capable of moving in a first direction. For example, the first clamping member 131 is movably connected to the mounting frame 11 and is capable of moving in the first direction, or the second clamping member 132 is movably connected to the mounting frame 11 and is capable of moving in the first direction, or the first clamping member 131 and the second clamping member 132 are each movably connected to the mounting frame 11 and both are capable of moving in the first direction. The drive shaft 122 is connected to the clamping assembly 13. When the main body 121 of the drive member 12 is activated, the drive shaft 122 drives the clamping assembly 13 to move, causing the first clamping member 131 and the second clamping member 132 to move toward or away from each other in the first direction. When the first clamping surface 1311 and the second clamping surface 1321 approach each other, the ear portion 301 of the nut anti-loosening limiter is clamped and pressed against the side wall 201 of the nut 200. When the ear portion 301 is released, the ear portion 301 is released.

[0055] The ear pressing device 10 of the embodiment of the present application is suitable for scooping up the ear 301 of the nut anti-loosening limiter and pressing it to fit the side wall 201 of the nut 200. Figure 1 and Figure 2When the ear pressing device is in use, the driving member 12 and the mounting frame 11 are moved so that the first clamping member 131 and the second clamping member 132 are located on both sides of the nut 200 along the radial direction of the nut 200, and the end surface of the first clamping member 131 facing away from the mounting frame 11 and the end surface of the second clamping member 132 facing away from the mounting frame 11 are moved to abut against the mounting surface 1001 on which the nut 200 is mounted, while the first direction is kept parallel to the radial direction of the nut 200, the head of the first shovel portion 1312 is aligned with the end of the ear 301 of the anti-loosening limit member 300 facing away from the nut 200, and the second clamping surface 1321 of the second clamping member 132 is aligned with the side wall 201 of the nut 200 facing away from the ear 3 01, and then start the driving member 12. The driving member 12 drives the first clamping member 131 and the second clamping member 132 to approach each other along the first direction, that is, the radial direction of the nut 200, through its driving shaft 122. During the approach, the head of the first shovel portion 1312 of the first clamping member 131 extends into between the ear 301 and the mounting surface 1001 and scoops up the ear 301, so that the end thereof facing away from the nut 200 is folded toward the side wall 201 of the nut 200. As the first clamping member 131 and the second clamping member 132 continue to approach each other, the second clamping surface 1321 is attached to the side wall 201 of the nut 200, and the first clamping member 131 presses the ear 301 until it is attached to the side wall 201 of the nut 200.

[0056] In this way, by using the ear pressing device, the ear 301 of the nut anti-loosening stopper can be operated, and the ear 301 originally attached to the mounting surface 1001 on which the nut 200 is installed can be lifted and pressed against the side wall 201 of the nut 200, thereby effectively fixing the nut anti-loosening stopper and preventing the nut 200 from loosening. Without using a hammer or other tool to strike the ear 301, the ear 301 of the anti-loosening stopper 300 that was originally attached to the side wall 201 of the nut 200 can be moved to be attached to the side of the nut 200, thereby avoiding a series of adverse effects caused by striking. At the same time, the tightness between the ear 301 of the anti-loosening stopper 300 and the side of the nut 200 can be improved, thereby improving the anti-loosening reliability of the nut 200, further reducing the risk of the nut 200 loosening due to factors such as vibration and pressure fluctuations, and improving the normal operation of equipment such as valves that are fastened with the nut 200.

[0057] It should be noted that in the embodiments of this application, please combine Figure 1 and Figure 2 The ear 301 refers to the second overlapping ear 3012 of the anti-loosening limiter 300 for adapting and fitting with the side wall 201 of the nut 200.

[0058] In some embodiments, as Figure 3 、 Figure 5 and Figure 6As shown, a first arcuate groove 1313 is provided at the end of the first clamping surface 1311 away from the mounting frame 11 , and a groove wall of the first arcuate groove 1313 away from the mounting frame 11 forms a first shovel portion 1312 .

[0059] In this embodiment, a first arcuate groove 1313 is provided on the first clamping surface 1311. The first arcuate groove 1313 is recessed inwardly and has a certain curvature. The groove wall of the first arcuate groove 1313 away from the mounting frame 11 forms a first shovel portion 1312, so that the head of the first shovel portion 1312 has a certain curvature and curved surface. On the one hand, when scooping up the ear portion 301, it can better fit the shape of the ear portion 301, provide a more uniform force, and avoid local excessive squeezing or damage to the ear portion 301; on the other hand, the arc-shaped structure may also help to guide the first shovel portion 1312 to smoothly enter the space between the ear portion 301 and the mounting surface 1001, so as to facilitate scooping up the ear portion 301 and realize subsequent clamping and pressing operations.

[0060] In addition, the first arc groove 1313 is arranged at the end of the first clamping surface 1311 and away from the mounting frame 11, so that the first arc groove 1313 and the first shovel portion 1312 formed thereby can be close to the ear portion 301 of the nut anti-loosening limiter that needs to be scooped up, and the mounting frame 11 will not interfere with the operation of the first shovel portion 1312.

[0061] In some embodiments, as Figure 6 As shown, the first clamping surface 1311 is a plane, and the first clamping surface 1311 is used to fit with the side plane of the nut 200 .

[0062] In this embodiment, the first clamping surface 1311 is a plane adapted to fit the side plane of the nut 200. When the first clamping surface 1311 clamps the ear portion 301 and folds over, the first clamping member 131 can press the ear portion 301 until it is tightly fitted against the side plane of the nut 200. In this way, the ear portion 301 of the nut anti-loosening limiter can be effectively clamped, preventing the ear portion 301 from shaking or shifting during operation. In addition, the first clamping surface 1311, by tightly fitting the side plane of the nut 200, can better press the ear portion 301 against the side wall 201 of the nut 200, achieving a good anti-loosening effect. In addition, this parallel fitting method can make the ear portion 301 more evenly stressed during the clamping and pressing process, avoiding damage to the ear 301 or the nut 200 due to excessive local force.

[0063] In some embodiments, as Figures 3 to 5As shown, the first clamping member 131 is rotatably connected to the mounting frame 11, and the rotation axis of the first clamping member 131 is perpendicular to the first direction and parallel to the first clamping surface 1311. The first clamping member 131 can rotate relative to the mounting frame 11 to adjust the angle of the first clamping surface 1311 facing the second clamping surface 1321.

[0064] In this embodiment, the first clamping member 131 is rotatably connected to the mounting frame 11, which means that the first clamping member 131 is not fixed to the mounting frame 11, but can rotate around a certain axis. This connection method provides the first clamping member 131 with freedom of movement, allowing it to achieve specific functions through rotation.

[0065] Specifically, the rotation axis is perpendicular to the first direction, that is, perpendicular to the relative movement direction between the first clamping member 131 and the second clamping member 132, and the rotation axis is parallel to the first clamping surface 1311. The first clamping surface 1311 always remains parallel to the rotation axis during the rotation process. In this way, the first clamping surface 1311 is used to adapt to the side plane of the nut 200 and clamp the key part of the ear 301 of the nut anti-loosening limit member. The rotation axis is parallel to it to ensure that when the first clamping member 131 rotates, the first clamping surface 1311 rotates around an axis parallel to itself, thereby adjusting the angle of the first clamping surface 1311 facing the second clamping surface 1321, that is, facing the side plane of the nut 200, so that the first clamping surface 1311 can be adjusted to remain parallel to the corresponding side plane of the nut 200.

[0066] In this way, through this angle adjustment, it is possible to better adapt to nuts 200 of different sizes and shapes, thereby improving the versatility and adaptability of the device. For example, when facing nuts 200 of different specifications, the first clamping member 131 can be rotated so that the angle between the first clamping surface 1311 and the second clamping surface 1321 can be optimized according to actual conditions, thereby clamping the ear 301 more tightly and stably therebetween, ensuring that the ear 301 can be effectively pressed to fit the side wall 201 of the nut 200, thereby improving the anti-loosening effect. At the same time, this adjustable angle design also helps to more conveniently place the ear 301 between the first clamping surface 1311 and the second clamping surface 1321 during the installation and operation of the device, thereby improving work efficiency.

[0067] In some embodiments, as Figures 3 to 5 As shown, the second clamping member 132 is rotatably connected to the mounting frame 11, and the rotation axis of the second clamping member 132 is perpendicular to the first direction and parallel to the second clamping surface 1321. The second clamping member 132 can rotate relative to the mounting frame 11 to adjust the angle of the second clamping surface 1321 facing the first clamping surface 1311.

[0068] In this embodiment, the second clamping member 132 is rotatably connected to the mounting frame 11, which means that the second clamping member 132 is not fixed to the mounting frame 11, but can rotate around a certain axis. This connection method provides the second clamping member 132 with freedom of movement, allowing it to achieve specific functions through rotation.

[0069] Specifically, the rotation axis is perpendicular to the first direction, that is, perpendicular to the relative movement direction between the first clamping member 131 and the second clamping member 132, and the rotation axis is parallel to the second clamping surface 1321. The second clamping surface 1321 always remains parallel to the rotation axis during the rotation process. In this way, the second clamping surface 1321 is used to adapt to and fit with the side plane of the nut 200. The rotation axis is parallel to it to ensure that when the second clamping member 132 rotates, the second clamping surface 1321 rotates around an axis parallel to itself, thereby adjusting the angle of the second clamping surface 1321 facing the side plane of the nut 200 adapted thereto, so that the second clamping surface 1321 can be adjusted to remain parallel to the side plane of the corresponding nut 200, thereby more completely fitting to the side plane of the nut 200.

[0070] In this way, through this angle adjustment, it is possible to better adapt to nuts 200 of different sizes and shapes, thereby improving the versatility and adaptability of the device. For example, when facing nuts 200 of different specifications, the angle between the first clamping surface 1311 and the second clamping surface 1321 can be optimized according to actual conditions by rotating the second clamping member 132, thereby clamping the ear 301 therebetween more tightly and stably, ensuring that the ear 301 can be effectively pressed to fit the side wall 201 of the nut 200, thereby improving the anti-loosening effect. At the same time, this adjustable angle design also helps to more conveniently place the ear 301 between the first clamping surface 1311 and the second clamping surface 1321 during the installation and operation of the device, thereby improving work efficiency.

[0071] In some embodiments, as Figure 3 、 Figure 5 and Figure 7As shown, the first clamping member 131 further has a third clamping surface 1314, which includes a first half plane 1314a and a second half plane 1314b that are arranged and connected at an angle, and the dividing line between the first half plane 1314a and the second half plane 1314b is parallel to the rotation axis of the first clamping member 131, and the first half plane 1314a and the second half plane 1314b are respectively used to adapt to the two adjacent side planes of the nut 200, and the first clamping member 131 can be rotated relative to the mounting frame 11 to make the first clamping surface 1314 11 is opposite to the second clamping surface 1321, or the third clamping surface 1314 is opposite to the second clamping surface 1321; the end of the first clamping member 131 facing away from the mounting frame 11 is also provided with a second shovel portion 1315, the second shovel portion 1315 is provided on the side where the third clamping surface 1314 is located and is located below the third clamping surface 1314 along the direction away from the mounting frame 11, the head of the second shovel portion 1315 is spaced apart from the third clamping surface 1314 and is flat for scooping up the ear 301 attached to the mounting surface 1001 on which the nut 200 is installed.

[0072] In this embodiment, the first clamping member 131 also has a third clamping surface 1314, which is another functional surface among the surfaces of the first clamping member 131 that is different from the first clamping surface 1311. The third clamping surface 1314 can be a surface facing away from the first clamping surface 1311 along the first direction, or it can be a surface connected to the side of the first clamping surface 1311 and adjacent to the first clamping surface 1311.

[0073] In this embodiment, the first clamping member 131 can rotate relative to the mounting frame 11 so as to switch between two states. In one state, Figure 3 and Figure 4 As shown, the first clamping surface 1311 is opposite to the second clamping surface 1321. At this time, it is mainly used to clamp the ear 301 of the nut anti-loosening limiter through the first clamping surface 1311 and the second clamping surface 1321, and press the ear 301 to fit against the side wall 201 of the nut 200; in another state, the third clamping surface 1314 is opposite to the second clamping surface 1321, and the two half planes of the third clamping surface 1314 are adapted to fit with the two adjacent side planes of the nut 200 to achieve a more secure clamping of the nut 200.

[0074] The third clamping surface 1314 is composed of a first half plane 1314a and a second half plane 1314b that are set and connected at an angle, so that the third clamping surface 1314 can adapt to the polyhedral side wall 201 of the nut 200, and the dividing line between the first half plane 1314a and the second half plane 1314b is parallel to the rotation axis of the first clamping member 131. When the first clamping member 131 rotates around the rotation axis, the two half planes of the third clamping surface 1314 can adjust the angle of its side plane facing the nut 200, so that the two half planes can be accurately aligned when they are in contact with the corresponding two side planes of the nut 200 to adapt to nuts 200 of different positions and angles, thereby improving the versatility and flexibility of the device.

[0075] Among them, it can be understood that the nut 200 is usually a polyhedron with multiple side faces. The first half plane 1314a and the second half plane 1314b are respectively used to fit with the two adjacent side planes of the nut 200. When the first clamping member 131 cooperates with the third clamping surface 1314 and the second clamping surface 1321 to clamp the ear 301 to the side wall 201 of the nut 200, the first half plane 1314a and the second half plane 1314b can respectively press the two side portions of the ear 301, thereby pressing the two side portions of the ear 301 to the two adjacent side walls 201 that fit the nut 200, so that the ear 301 can fit more stably and reliably on the side wall 201 of the nut 200, further improving the anti-loosening effect.

[0076] For example, when the nut 200 is a hexagonal nut 200, it has six side faces, and the angle between two adjacent side faces is 120 degrees. The angle α between the first half plane 1314a and the second half plane 1314b of the third clamping surface 1314 is also 120 degrees. Figure 7 As shown, in this way, when the third clamping surface 1314 is adjusted by rotating to the point where the first half plane 1314a is parallel to one side plane of the nut 200 and the second half plane 1314b is parallel to another adjacent side plane, the first clamping member 131 can cooperate with the second clamping member 132 to press the two side portions of the ear 301 to fit the two side portions of the nut 200 respectively.

[0077] Furthermore, the first clamping member 131 is further provided with a second scooping portion 1315. The second scooping portion 1315 is positioned to the side of the third clamping surface 1314 and is located below the third clamping surface 1314 in a direction away from the mounting frame 11. The head of the second scooping portion 1315 is spaced apart from the third clamping surface 1314 and is flat. Similar to the first scooping portion 1312, this shape design allows the head of the second scooping portion 1315 to be inserted under the ear portion 301 abutting against the mounting surface 1001, thereby scooping up the ear portion 301. Thus, when the third clamping surface 1314 is used in conjunction with the second clamping surface 1321, the ear portion 301 can be scooped up by the second scooping portion 1315.

[0078] In some embodiments, as Figure 4 、 Figure 5 and Figure 7 As shown, the third clamping surface 1314 also includes at least one extension plane 1314c, the side of the first half plane 1314a facing away from the second half plane 1314b is connected to the extension plane 1314c, and / or the side of the second half plane 1314b facing away from the first half plane 1314a is connected to the extension plane 1314c, and when the third clamping surface 1314 cooperates with the second clamping surface 1321 and is used to clamp the nut 200, the extension plane 1314c is parallel to the second clamping surface 1321, and the end of the extension plane 1314c facing away from the mounting frame 11 is provided with a second arc groove 1316, and the groove wall of the second arc groove 1316 facing away from the mounting frame 11 forms a second shovel portion 1315.

[0079] In this embodiment, the third clamping surface 1314 also includes an extended plane 1314c. When the third clamping surface 1314 cooperates with the second clamping surface 1321 and is used to clamp the nut 200, the extended plane 1314c is parallel to the second clamping surface 1321. A second arc-shaped groove 1316 is provided at the end of the plane facing away from the mounting frame 11. Similar to the first shovel portion 1312, the groove wall of the second arc-shaped groove 1316 facing away from the mounting frame 11 forms a second shovel portion 1315, so that the head of the second shovel portion 1315 has a certain curvature and curved surface. On the one hand, when scooping up the ear portion 301, it can better fit the shape of the ear portion 301, provide more uniform force, and avoid local excessive squeezing or damage to the ear portion 301; on the other hand, the arc-shaped structure may also help guide the second shovel portion 1315 to smoothly enter the space between the ear portion 301 and the mounting surface 1001, thereby facilitating the scooping up of the ear portion 301 to achieve subsequent clamping and pressing operations.

[0080] In addition, the second arc groove 1316 is arranged at the end of the extension plane 1314c, that is, the third clamping surface 1314, and is away from the mounting frame 11, so that the second arc groove 1316 and the second shovel portion 1315 formed thereby can be close to the ear portion 301 of the nut anti-loosening limit member that needs to be scooped up, and the mounting frame 11 will not interfere with the operation of the second shovel portion 1315.

[0081] In a specific embodiment, the extension plane 1314c is connected to the side of the first half plane 1314a facing away from the second half plane 1314b, or the extension plane 1314c is connected to the side of the second half plane 1314b facing away from the first half plane 1314a, or the side of the first half plane 1314a facing away from the second half plane 1314b and the side of the second half plane 1314b facing away from the first half plane 1314a are each connected to an extension plane 1314c.

[0082] In a specific embodiment, the third clamping surface 1314 and the first clamping surface 1311 are respectively arranged on two sides of the first clamping member 131 facing each other along the first direction, that is, the third clamping surface 1314 and the first clamping surface 1311 are arranged back to back, and the extension plane 1314c is parallel to the first clamping surface 1311.

[0083] In some embodiments, as Figures 3 to 5 As shown, the structure of the second clamping member 132 is the same as that of the first clamping member 131 .

[0084] In this embodiment, the structure of the second clamping member 132 is the same as that of the first clamping member 131 , which means:

[0085] In this embodiment, the first clamping member 131 and the second clamping member 132 have the same geometric shape, that is, the outer contour, the shape and position relationship of each functional surface (such as the clamping surface, the shovel portion, etc.) of the second clamping member 132 are completely consistent with those of the first clamping member 131.

[0086] For example, if the first clamping member 131 is provided with a first clamping surface 1311 and a third clamping surface 1314 (including a first half-plane 1314a, a second half-plane 1314b, and an extended plane 1314c), then the second clamping member 132 is correspondingly provided with a second clamping surface 1321 (structured in a mirror image with the first clamping surface 1311) and a fourth clamping surface 1322 (structured in a mirror image with the third clamping surface 1314) of the same configuration. If the first clamping member 131 is provided with a first arcuate groove 1313 and a first shovel portion 1312, as well as a second arcuate groove 1316 and a second shovel portion 1315 at the end, then the second clamping member 132 is provided with a third arcuate groove 1325 and a third shovel portion 1323, as well as a fourth arcuate groove 1326 and a fourth shovel portion 1324 at symmetrical positions, and the opening directions of the arcuate grooves and the flat head shapes of the shovel portions are also mirror image symmetrical. The first clamping member 131 and the second clamping member 132 are rotatably connected to the mounting frame 11 in the same manner. The rotatable connection structure of the second clamping member 132 to the mounting frame 11 is consistent with that of the first clamping member 131 .

[0087] On this basis, the first clamping member 131 and the second clamping member 132 can achieve complementary clamping actions. When the first clamping member 131 and the second clamping member 132 are arranged opposite each other, they can achieve "symmetrical clamping." That is, if the first clamping member 131 is aligned with the side plane of the nut 200 through the first clamping surface 1311, the second clamping surface 1321 of the second clamping member 132 is symmetrically aligned with the opposite side plane of the nut 200, forming a bidirectional clamping force and improving clamping stability. When the first clamping member 131 rotates to the point where the third clamping surface 1314 is opposite to the fourth clamping surface 1322 of the second clamping member 132, the third clamping surface 1314 can clamp the ear 301 to fit onto two adjacent side surfaces of the nut 200, and the fourth clamping surface 1322 can fit onto two other adjacent side surfaces of the nut 200, and these two sides are arranged opposite to the two side surfaces corresponding to the third clamping member, thereby achieving multi-sided clamping of the nut 200.

[0088] Thus, the first clamping member 131 and the second clamping member 132 have the same structure, and the first clamping member 131 and the second clamping member 132 can be produced in a standardized manner, thereby reducing manufacturing and maintenance costs. For example, the first clamping member 131 and the second clamping member 132 can be processed using the same mold.

[0089] In some embodiments, as Figures 3 to 5As shown, the ear pressing device 10 also includes a transmission assembly 14, which includes a push block 142 and two groups of connecting rod groups 141 with the same structure installed on the mounting frame 11, the push block 142 is connected to the drive shaft 122, and the two groups of connecting rod groups 141 are respectively connected to the push block 142 and are located on both sides of the drive shaft 122 along the first direction; the first clamping member 131 is installed at one end of one group of connecting rod groups 141 away from the push block 142, and the second clamping member 132 is installed at one end of the other group of connecting rod groups 141 away from the push block 142, and the drive shaft 122 drives the push block 142 to perform reciprocating linear motion along the second direction, and is transmitted through the two groups of connecting rod groups 141 to drive the first clamping member 131 and the second clamping member 132 to approach or move away from each other along the first direction, and the second direction is perpendicular to the first direction.

[0090] In this embodiment, the ear pressing device 10 also includes a transmission assembly 14, and the first clamping member 131 and the second clamping member 132 are connected to the driving shaft 122 of the driving member 12 through the transmission assembly 14, so that the first clamping member 131 can be driven away from or closer to each other by the driving member 12.

[0091] In a specific embodiment, the transmission assembly 14 is mainly composed of two groups of connecting rod groups 141 with the same structure installed on the mounting frame 11. These two groups of connecting rod groups 141 are key components for realizing force and motion transmission. Their identical structure means that they have similar characteristics and functions in terms of motion and force. The driving end of the drive shaft 122 is connected to a push block 142. The push block 142 moves under the action of the drive shaft 122. The push block 142 transmits the power of the drive shaft 122 to the connecting rod group 141. The two groups of connecting rod groups 141 are respectively connected to the push block 142 and are located on both sides of the drive shaft 122 along the first direction. This layout enables the movement of the push block 142 to be evenly transmitted to the two groups of connecting rod groups 141, ensuring the balance and stability of the transmission.

[0092] The first clamping member 131 is installed on one end of one set of connecting rod groups 141 away from the push block 142, and the second clamping member 132 is installed on the other end of the other set of connecting rod groups 141 away from the push block 142. When the driving shaft 122 drives the push block 142 to perform reciprocating linear motion along the second direction, the movement of the push block 142 is transmitted through the two sets of connecting rod groups 141. Due to the connection and transmission action of the connecting rod groups 141, the first clamping member 131 and the second clamping member 132 will approach or move away from each other along the first direction. In addition, the push block 142 moves in a second direction, which is perpendicular to the first direction, that is, the movement direction of the push block 142 pushed by the drive shaft 122 is perpendicular to the movement direction of the first clamping member 131 and the second clamping member 132. Through this vertical movement conversion, precise control of the positions of the first clamping member 131 and the second clamping member 132 is achieved, so that the distance between them can be adjusted as needed to adapt to nuts 200 of different sizes or to complete different operations, such as clamping or loosening the nut 200 and the ear 301.

[0093] For example, when the nut 200 needs to be tightened, the drive shaft 122 drives the push block 142 to move in the second direction, and through the transmission of the connecting rod group 141, the first clamping member 131 and the second clamping member 132 are moved closer to each other in the first direction until the ear 301 is tightened to fit the side wall 201 of the nut 200 and clamped; when the nut 200 needs to be loosened, the drive shaft 122 drives the push block 142 to move in the opposite direction of the first direction, driving the first clamping member 131 and the second clamping member 132 away from each other, thereby loosening the nut 200.

[0094] In a specific embodiment, Figure 3 、 Figure 5 and Figure 8 As shown, the two groups of connecting rod groups 141 each include a first connecting rod 1411, a second connecting rod 1412 and an auxiliary rod 1413, wherein, taking one group of connecting rod groups 141 as an example, the first connecting rod 1411, the second connecting rod 1412 and the auxiliary rod 1413 each have a first end and a second end arranged relatively along the second direction, the first end of the first connecting rod 1411 is pivoted to the push block 142, the middle part of the second connecting rod 1412 is pivoted to the mounting frame 11, the first end of the second connecting rod 1412 is pivoted to the second end of the first connecting rod 1411, the second end of the second connecting rod 1412 is fixedly connected to the clamping block 111, the first clamping member 131 is rotatably installed on the clamping block 111, the first end of the auxiliary rod 1413 is pivoted to the mounting frame 11, the second end of the auxiliary rod 1413 is fixedly connected to the mounting frame 11, and the auxiliary rod 1413 supports the clamping block 111 so that it can move stably.

[0095] In this manner, the drive shaft 122 of the driving member 12 drives the push block 142 to move in the first direction. The push block 142 drives the first connecting rod 1411 to pull the second connecting rod 1412 to pivot relative to the mounting frame 11, causing the second end of the second connecting rod 1412 to swing back and forth in the first direction relative to the mounting frame 11, thereby driving the clamping block 111 and the first clamping member 131 connected thereto to swing back and forth in the first direction. Similarly, the second clamping member 132 is pivotally mounted to the second end of the second connecting rod 1412 of the other connecting rod assembly 141 via the clamping block 111. While the push block 142 pushes the first clamping member 131, it also drives the second clamping member 132 to swing back and forth in the first direction via the other connecting rod assembly 141. In this way, the relative distance between the first clamping member 131 and the second clamping member 132 can be adjusted, that is, the first clamping member 131 and the second clamping member 132 can be driven away from or closer to each other.

[0096] In a specific embodiment, the driving member 12 may be a hydraulic driving member, or a pneumatic driving member or other driving structures.

[0097] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0098] It can be understood that by using the ear pressing device of the nut anti-loosening limiter provided in each embodiment of the present application, the ear of the nut anti-loosening limiter is scooped up and pressed until it fits against the side wall of the nut. Compared with the traditional technology of scooping up the ear with a flat shovel and hitting the ear with a hammer to make it fit against the side wall of the nut, it has the following advantages:

[0099] 1. High operational safety: The existing hammer-type striking method poses a significant safety hazard. Improper force during striking can easily cause the tool to lose control, resulting in accidental injury to the operator. The ear pressing device provided in the embodiments of the present application is driven by a drive element such as a hydraulic drive. The operator only needs to preset the drive parameters of the drive element and monitor the status, without having to directly strike the ear, greatly reducing the possibility of safety accidents.

[0100] 2. Strong equipment protection: Traditional methods make it difficult to precisely control the force of the strike, which can easily cause damage to the equipment, such as scratches and deformation, affecting the equipment's accuracy, sealing performance, and service life. The ear clamping device provided in the embodiments of the present application precisely controls the driving force and applies it smoothly, avoiding direct impact on the equipment and helping to extend the service life of components such as nuts and anti-loosening limiters.

[0101] 3. Excellent adaptability: The ear of the nut and the anti-loosening limiter has a variety of fitting angles and states in actual working conditions, such as the ear fitting with a side plane in the side wall of the nut, or the two sides of the ear fitting with two adjacent side planes in the side wall of the nut respectively. The first clamping member and the second clamping member of the ear clamping device provided in the embodiment of the present application are movably connected to the mounting frame, and the first clamping surface and the third clamping surface are provided to adapt to different fitting conditions. Regardless of whether the ear fits with one side plane of the nut or with both side planes at the same time, it can make the ear fit tightly, providing a guarantee for improving the anti-loosening effect.

[0102] 4. Accurate and efficient operation: Traditional installation relies on the operator's experience, resulting in uneven installation quality and low efficiency. The ear clamping device provided in the embodiment of the present application can achieve standardized and precise operation by accurately setting the driving parameters of the driving component, greatly improving the accuracy and consistency of installation. At the same time, the stable driving force output and efficient force transmission mechanism reduce the number of operating steps and time, significantly improve maintenance efficiency, and ensure the efficient implementation of nuclear power maintenance work such as valve maintenance.

[0103] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A device for pressing the ear of a nut anti-loosening limiter, used to scoop up the ear of the nut anti-loosening limiter and press it tightly to fit the side wall of the nut, characterized in that: The ear pressing device comprises: Mounting rack; The driving member includes a main body and a driving shaft provided on the main body, and the mounting bracket is connected to the main body; The clamping assembly comprises a first clamping member and a second clamping member mounted on the mounting frame and spaced apart along a first direction, the first clamping member having a first clamping surface for clamping the ear portion of the anti-loosening limit member, a first shovel portion being provided at an end of the first clamping member facing away from the mounting frame, the first shovel portion being provided on a side where the first clamping surface is located and being located below the first clamping surface in a direction away from the mounting frame, the head portion of the first shovel portion being spaced apart from the first clamping surface and being flattened for scooping up the ear portion affixed to the mounting surface on which the nut is mounted, the second clamping member having a second clamping surface facing the first clamping surface, the second clamping surface being used to affix to a side wall of the nut facing away from the ear portion; In which, at least one of the first clamping member and the second clamping member is movably connected to the mounting frame and can move along the first direction, and the drive shaft is connected to the clamping assembly and can drive the first clamping member and the second clamping member to approach or move away from each other along the first direction, so that the first clamping surface and the second clamping surface approach or move away from each other.

2. The ear pressing device according to claim 1, wherein: The end of the first clamping surface facing away from the mounting frame is provided with a first arcuate groove, and the groove wall of the first arcuate groove facing away from the mounting frame forms the first shovel portion.

3. The ear pressing device according to claim 1, wherein: The first clamping surface is a plane, and the first clamping surface is used to fit with the side plane of the nut.

4. The ear pressing device according to claim 1, wherein: The first clamping member is rotatably connected to the mounting frame, the rotation axis of the first clamping member is perpendicular to the first direction and parallel to the first clamping surface, and the first clamping member can be rotated relative to the mounting frame to adjust the angle of the first clamping surface facing the second clamping surface.

5. The ear pressing device according to claim 4, characterized in that: The first clamping member further has a third clamping surface, the third clamping surface including a first half plane and a second half plane that are connected and arranged at an angle, the boundary line between the first half plane and the second half plane being parallel to the rotation axis of the first clamping member, the first half plane and the second half plane being respectively adapted to fit with two adjacent side planes of the nut, and the first clamping member being rotatable relative to the mounting frame such that the first clamping surface is opposite to the second clamping surface, or the third clamping surface is opposite to the second clamping surface; A second shovel portion is further provided at the end of the first clamping member facing away from the mounting frame. The second shovel portion is provided on the side where the third clamping surface is located and is located below the third clamping surface in the direction away from the mounting frame. The head of the second shovel portion is spaced apart from the third clamping surface and is flat so as to scoop up the ear portion that is attached to the mounting surface on which the nut is mounted.

6. The ear pressing device according to claim 5, characterized in that: The included angle between the first half plane and the second half plane is 120°.

7. The ear pressing device according to claim 5, wherein: The third clamping surface also includes at least one extended plane, and the side of the first half plane facing away from the second half plane is connected to the extended plane, and / or the side of the second half plane facing away from the first half plane is connected to the extended plane. When the third clamping surface cooperates with the second clamping surface and is used to clamp the nut, the extended plane is parallel to the second clamping surface, and the end of the extension plane facing away from the mounting frame is provided with a second arc-shaped groove, and the groove wall of the second arc-shaped groove facing away from the mounting frame forms the second shovel portion.

8. The ear pressing device according to any one of claims 1 to 7, characterized in that: The second clamping member is rotatably connected to the mounting frame, the rotation axis of the second clamping member is perpendicular to the first direction and parallel to the second clamping surface, and the second clamping member can be rotated relative to the mounting frame to adjust the angle of the second clamping surface facing the first clamping surface.

9. The ear pressing device according to claim 8, wherein: The structure of the second clamping member is the same as that of the first clamping member.

10. The ear pressing device according to any one of claims 1 to 7, characterized in that: The ear pressing device further includes a transmission assembly, the transmission assembly including a push block and two groups of connecting rods with the same structure mounted on the mounting frame, the push block is connected to the drive shaft, and the two groups of connecting rods are respectively connected to the push block and located on both sides of the drive shaft along the first direction; The first clamping member is installed at one end of one group of the connecting rod groups away from the push block, and the second clamping member is installed at one end of the other group of the connecting rod groups away from the push block. The driving shaft drives the push block to perform reciprocating linear motion along the second direction, and is driven by the two groups of the connecting rod groups to drive the first clamping member and the second clamping member to move closer to or away from each other along the first direction, and the second direction is perpendicular to the first direction.

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