High-torque nut removal and tightening device

Abstract

This invention discloses a high-torque nut disassembly and tightening device, comprising: a base, a support clamping assembly, a support rod assembly, a first chuck assembly, and a force-applying drive assembly. The support clamping assembly is used to clamp the second long shaft or the locking nut mounted thereon from both sides of the second long shaft. The first chuck assembly is used to clamp the locking nut mounted on the outer circle of the first long shaft. The first chuck assembly has lever shafts extending cantilevered along opposite sides of the first long shaft. The force-applying drive assembly is vertically supported on the base and its upper end is connected to the outer end of one of the lever shafts, so that under the action of downward pressure, the first chuck assembly clamps the locking nut and rotates it by a set angle to disassemble or tighten it. This device is particularly suitable for situations where there is no space to use a torque multiplier on the test bench. It can disassemble and tighten the locking nut on the test bench without damaging the fasteners and equipment by drilling and cutting on-site, greatly improving disassembly efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of torque nut assembly and disassembly devices, and in particular, to a torque nut disassembly and tightening device. Background Technology

[0002] At the strength test site, various complex loads such as tensile force, shear force, bending moment, and torque are applied to the test piece through a hydraulic system, motor, and testing equipment. The testing equipment, directly connected to the test piece, also bears these complex loads. After multiple rounds of testing, or in case of test failures, the testing equipment needs to be disassembled and inspected on-site. The first step in this disassembly inspection is to disassemble the locking nut. If the nut's disassembly torque is too large, and there are many spatial interference factors around it (excessively long threaded rods, other parts connected to the ends of the threaded rods, hydraulic lines, and other objects), it must be disassembled and removed. Then, the remaining parts are inspected, and during reassembly, the locking nut can be accurately tightened, thus providing strong support for completing various important test tasks.

[0003] For disassembling high-torque locking nuts, existing solutions mainly involve using torque multipliers and matching tooling to apply a large-scale amplified torque. However, in many cases, due to interference between the long screw end and nearby obstacles, it is impossible to insert torque multipliers such as torque wrenches from the end of the long screw, or there is not enough operating space to apply a sufficient torque. Therefore, methods such as drilling and cutting can only be used to destructively disassemble the locking nuts.

[0004] Existing disassembly techniques for locking nuts are not suitable for on-site disassembly of locking nuts on testing equipment when they exhibit high torque jamming. The specific reasons are as follows: On the one hand, after the tester has completed multiple rounds of testing, especially the long-term heavy-load test, the locking nut has experienced increased thread engagement under various loads, resulting in jamming and significantly increasing the torque required for disassembly, making it difficult to disassemble using a torque wrench directly. On the other hand, at the test site, there were numerous loading rods, connecting rods, and connecting wires of various types, making it difficult to position common torque amplification tools such as torque multipliers at working positions coaxial with the nut, and there was no suitable point of leverage.

[0005] In situations like the above, mechanical methods are typically used to break the nut, such as using a hand drill to directly break it on-site. The disadvantages of this method are: it is difficult to operate, inefficient, and can damage the threaded and other mechanical structures of the equipment, leading to additional losses. Summary of the Invention

[0006] This invention provides a high-torque nut disassembly and tightening device to solve the technical problem of not having space to use a torque multiplier in complex test bench situations.

[0007] The technical solution adopted in this invention is as follows: A high-torque nut disassembly and tightening device is disclosed for disassembling or tightening locking nuts on a testing apparatus. The testing apparatus has a first long shaft and a second long shaft extending axially at both ends, and a locking nut is present on the outer circumference of at least the first long shaft. The device comprises: a base supporting the apparatus; a support clamping assembly and a support rod assembly vertically supported on the base; a first chuck assembly; and a force-applying drive assembly. The support clamping assembly and the support rod assembly are sequentially spaced along the axial direction of the testing apparatus, with the support rod assembly positioned closer to the first long shaft and the support clamping assembly positioned closer to the second long shaft. The support clamping assembly is used to disassemble or tighten locking nuts on both sides of the second long shaft. The first chuck assembly is used to clamp the second long shaft or the locking nut mounted on the outer circle of the second long shaft to prevent the tester from rotating when the locking nut on the outer circle of the first long shaft is disassembled or tightened. The first chuck assembly is used to clamp the locking nut mounted on the outer circle of the first long shaft from both sides. The support rod assembly is used to support the first chuck assembly and cooperates with the support clamping assembly to stably support the tester. The first chuck assembly has lever shafts that extend into cantilever arms along the opposite sides of the first long shaft. The force-driven assembly is vertically supported on the base platform and its upper end is connected to the outer end of one of the lever shafts so that the first chuck assembly can be rotated by a set angle to clamp the locking nut under the action of downward pressure for disassembly or tightening.

[0008] Furthermore, the first clamping assembly includes two sets of opposing first clamping heads and multiple sets of first fastening connectors; the two sets of first clamping heads are used to clamp the locking nut from both sides of the first end long shaft, and the multiple sets of first fastening connectors are passed through and connected between the two sets of first clamping heads to relatively tighten and lock the two sets of first clamping heads; and each set of first clamping heads includes a clamping head and a lever shaft connecting the clamping head.

[0009] Furthermore, the inner wall of the clamp head for contacting the locking nut is provided with a clamping structure; the locking nut is a regular polygonal structure, and the clamping structure is a V-shaped groove that clamps with two adjacent sides of the locking nut; or, the outer circular surface of the locking nut is machined to form two parallel planes, and the clamping structure is a mating plane that fits with the planes; or, two concave hook grooves are symmetrically machined on the outer circular surface of the locking nut, and the clamping structure is a convex protrusion connected to the inner wall for engaging with the hook grooves.

[0010] Furthermore, the force-driving assembly includes a mounting screw, a force-applying nut and a sensor sequentially mounted on the outer circumference of the mounting screw; the mounting screw is vertically positioned with its lower end threaded to the base platform, and its upper end is used to pass through the outer end of one of the lever shafts in the first chuck assembly; the sensor is supported on the lever shaft through which the mounting screw passes, and the force-applying nut is located above the sensor so that it can be moved downward under the action of external force to press down and push the sensor, thereby causing the sensor to press down and push the outer end of the lever shaft.

[0011] Furthermore, the support rod assembly includes a strut, an adjusting pad for adjusting the support height of the strut, and multiple sets of second fastening connectors; the adjusting pad is supported on the base platform, the strut is vertically arranged, and its bottom end is supported on the adjusting pad and detachably connected to the base platform through multiple sets of second fastening connectors; the upper end of the strut is used to support the bottom end of one set of first clamping heads upward, and the upper end of the force-applying drive assembly is connected to another set of first clamping heads.

[0012] Furthermore, the support clamping assembly includes a second chuck assembly, two sets of micro-motion connecting blocks connected to opposite sides of the second chuck assembly, and two sets of support seats respectively disposed on opposite sides of the second end long shaft; the second chuck assembly is used to clamp the second end long shaft from opposite sides or to lock nuts mounted on the outer circle of the second end long shaft; the two sets of support seats are respectively vertically arranged and their bottom ends are respectively connected to the base platform, and the upper ends of the two sets of support seats are respectively provided with mounting ports for installing the two sets of micro-motion connecting blocks, the two sets of micro-motion connecting blocks are disposed in the two mounting ports, and the micro-motion connecting blocks are movably connected to the mounting ports on the corresponding sides to avoid the tester being completely jammed by the support clamping assembly.

[0013] Furthermore, the second chuck assembly has the same structure as the first chuck assembly, and has two lever shafts that extend into cantilevered arms on opposite sides of the second end long axis; the two lever shafts are respectively threaded through two sets of micro-motion connecting blocks on both sides, and are rotatably connected to the micro-motion connecting blocks on the corresponding sides.

[0014] Furthermore, each set of support bases includes a support vertically mounted on the base, a cover plate, a third fastening connector, and multiple sets of fourth fastening connectors; the lower end of the support is detachably connected to the base platform via the third fastening connector, and the upper end of the support extends inward from its top end to form an installation opening, which penetrates the support along its thickness direction; the cover plate is placed on the top end of the support and is detachably connected to the support via multiple sets of fourth fastening connectors to close the upper opening of the installation opening; the micro-motion connecting block is located in the installation opening, and the upper and lower surfaces of the micro-motion connecting block contact the cover plate and the bottom surface of the installation opening, respectively, and the left and right surfaces of the micro-motion connecting block are respectively spaced from the left and right surfaces of the installation opening.

[0015] Furthermore, the high-torque nut disassembly and tightening device also includes a hoisting assembly, which includes a hoisting plate, a hoisting ring, and multiple sets of sixth fastening connectors that are detachably connected to one end of the base platform along its length via multiple sets of fifth fastening connectors; the upper end of the hoisting plate is provided with an oblong hole that penetrates the plate surface and extends along the height direction; one end of the hoisting ring is slidably connected to the oblong hole via the sixth fastening connector.

[0016] Furthermore, let T be the disassembly torque required to remove the locking nut, and S be the distance between opposite sides of the locking nut, then: , where F is the tensile load required to loosen and tighten the nut.

[0017] The present invention has the following beneficial effects: The high-torque nut removal and tightening device of this application is particularly suitable for complex test bench conditions, where there is no space to use a torque multiplier, for the removal and tightening of locking nuts on the test bench. In this application, the supporting clamping assembly and the support rod assembly work together to provide stable axial support for the test bench, facilitating the subsequent removal and installation of locking nuts. Simultaneously, the supporting clamping assembly clamps the second end of the test bench that does not currently require removal or tightening of locking nuts, preventing the test bench from rotating during the removal or tightening of locking nuts on the first end, which would affect the smooth execution of the removal and tightening actions. Furthermore, when it is necessary to remove and tighten nuts on the second end of the test bench, the test bench can be rotated. In this application, both the supporting clamping assembly and the first chuck assembly clamp the corresponding nuts from both sides of the first or second long shaft. The device of this application, which uses either the first or second long shaft or the locking nut, enters the testing apparatus from the side for clamping operations. It simultaneously applies torque from the side and provides anti-torsional constraint. Compared to existing tools that require operation on an axis concentric with the nut, this device allows for convenient disassembly and accurate tightening. Furthermore, during disassembly or tightening, the force-driving assembly applies force to the outer end of the lever shaft on the first chuck assembly, causing the first chuck assembly to apply a torque amplified several times (up to tens of thousands of Nm, or even more), with the center of the locking nut as the fulcrum and the length of the lever shaft as the lever arm. This makes it highly suitable for disassembling and assembling large threaded fasteners. The solution has been verified in use, repeatedly avoiding damage to fasteners and equipment through drilling and cutting on-site. It successfully disassembles jammed high-torque nuts, protecting equipment, reducing disassembly workload, and significantly improving disassembly efficiency.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the main structure of the high-torque nut disassembly and tightening device according to a preferred embodiment of the present invention; Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the middle AA direction; Figure 3 yes Figure 1 Schematic diagram of the cross-sectional structure along line A1-A1; Figure 4 yes Figure 1 Schematic diagram of the cross-sectional structure along the middle BB direction; Figure 5 yes Figure 4 A schematic diagram of the C-direction structure; Figure 6 yes Figure 1 Schematic diagram of the spatial structure of the medium-torque nut disassembly and tightening device Figure 1 ; Figure 7 yes Figure 1 Schematic diagram of the spatial structure of the medium-torque nut disassembly and tightening device Figure 2 ; Figure 8 yes Figure 1 Schematic diagram of the lifting state of the medium-high torque nut disassembly and tightening device; Figure 9 This is a cross-sectional view of the first chuck assembly clamping the locking nut in the second embodiment; Figure 10 This is a cross-sectional view of the first chuck assembly clamping the locking nut in the third embodiment.

[0020] Legend: 1. Testing apparatus; 11. Locking nut; 2. Base platform; 201. T-slot; 3. Support clamping assembly; 31. Second chuck assembly; 32. Micro-motion connecting block; 33. Support base; 331. Mounting port; 332. Support; 333. Cover plate; 334. Third fastening connector; 335. Fourth fastening connector; 4. Support rod assembly; 41. Strut; 42. Adjusting pad; 43. Second fastening connector; 5. First chuck assembly; 51. First clamping head; 511. Clamping head; 512. Lever shaft; 513. Clamping structure; 52. First fastening connector; 6. Force-applying drive assembly; 61. Mounting screw; 62. Force-applying nut; 63. Sensor; 64. Intermediate hydraulic actuator cylinder; 7. Lifting assembly; 71. Fifth fastening connector; 72. Lifting plate; 73. Lifting ring; 74. Sixth fastening connector. Detailed Implementation

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] Those skilled in the art will understand that, unless specifically stated otherwise, the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, components, and / or combinations thereof. It should be understood that when we say a component is "connected" to another component, it can be directly connected to the other component or connected via an intermediate component. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items. The terms "first" and "second," etc., in this specification and claims are used to distinguish different objects, not to describe a particular order.

[0023] Reference Figure 1 , Figure 6 and Figure 7A preferred embodiment of the present invention provides a high-torque nut disassembly and tightening device for disassembling or tightening a locking nut 11 on a testing apparatus 1. The testing apparatus 1 has a first long shaft and a second long shaft extending axially at both ends, and a locking nut 11 is mounted on the outer circumference of at least the first long shaft. The high-torque nut disassembly and tightening device includes: a base platform 2 providing mounting support; a support clamping assembly 3 and a support rod assembly 4 vertically supported on the base platform 2; a first chuck assembly 5; and a force-applying drive assembly 6. The support clamping assembly 3 and the support rod assembly 4 are arranged sequentially at intervals along the axial direction of the testing apparatus 1, with the support rod assembly 4 positioned closer to the first long shaft and the support clamping assembly 3 positioned closer to the second long shaft. The support clamping assembly 3 is used to clamp the second long shaft or the locking nut 11 mounted on the outer circumference of the second long shaft from both sides, preventing the testing apparatus 1 from rotating during the disassembly or tightening of the locking nut 11 on the outer circumference of the first long shaft. The first chuck assembly 5 is used to clamp the locking nut 11 mounted on the outer circle of the first long shaft from both sides. The support rod assembly 4 is used to support the first chuck assembly 5 and cooperates with the support clamping assembly 3 to stably support the tester 1. The first chuck assembly 5 has lever shafts 512 that extend cantilevered from both sides of the first long shaft. The force-applying drive assembly 6 is vertically supported on the base 2 and its upper end is connected to the outer end of one of the lever shafts 512, so that under the action of downward pressure, the first chuck assembly 5 clamps the locking nut 11 and rotates it by a set angle to disassemble or tighten it.

[0024] The high-torque nut disassembly and tightening device of this application is particularly suitable for complex test bench conditions, where there is no space to use a torque multiplier, for disassembling and tightening the locking nut 11 on the tester 1. In this application, the supporting clamping assembly 3 and the support rod assembly 4 are configured to provide stable axial support for the tester 1, facilitating the subsequent disassembly and installation of the locking nut 11 on the tester 1. Simultaneously, the supporting clamping assembly 3 clamps the second end of the tester 1 that does not currently require disassembly and tightening of the locking nut, preventing the tester 1 from rotating during the disassembly or tightening of the locking nut 11 on the first end, which would affect the smooth execution of the disassembly and tightening operations. Furthermore, when it is necessary to disassemble and tighten the nut on the second end of the tester 1, the tester 1 can be rotated. In this application, both the supporting clamping assembly 3 and the first chuck assembly 5 are clamped relative to each other by the two sides of the first or second long shaft. The corresponding first or second long shaft or locking nut, i.e., the device of this application, enters the tester 1 from the side for clamping operation, applies torque from the side, and also applies anti-torsional constraint from the side. Compared with existing tools that need to be arranged on the axis with the same center as the nut for operation, the device of this application can be disassembled and tightened very conveniently and accurately. In addition, during disassembly or tightening operations, the force driving component 6 is connected to the outer end of the lever shaft 512 on the first chuck assembly 5 to apply force, so that the first chuck assembly 5 applies a torque amplified several times (up to tens of thousands of Nm or even more) with the center of the locking nut 11 as the fulcrum and the length of the lever shaft 512 as the lever arm. Therefore, it is very suitable for the disassembly and assembly of large threaded fasteners. Moreover, the solution of this application has been verified by use, and has repeatedly avoided the use of drilling and cutting to damage the fasteners and equipment on site. It has successfully disassembled the stuck high torque nut, protected the equipment, reduced the disassembly workload, and greatly improved the disassembly efficiency.

[0025] Optionally, such as Figure 2 and Figure 3 As shown, the first chuck assembly 5 includes two sets of opposing first clamping heads 51 and multiple sets of first fastening connectors 52. The two sets of first clamping heads 51 are used to clamp the locking nut 11 from both sides of the first end long shaft. The multiple sets of first fastening connectors 52 are inserted and connected between the two sets of first clamping heads 51 to relatively tighten and lock the two sets of first clamping heads 51. Each set of first clamping heads 51 includes a clamping head 511 and a lever shaft 512 connecting the clamping head 511. In this optional solution, the first chuck assembly 5 has a simple structure, is easy to manufacture, has low manufacturing cost, and is easy to operate to clamp the locking nut 11.

[0026] In this optional embodiment, a clamping structure 513 is provided on the inner sidewall of the clamping head 511 for contacting the locking nut 11. A first embodiment of the first clamping head assembly 5 is as follows... Figure 2 and Figure 3As shown, the locking nut 11 has a regular polygonal structure, and the clamping structure 513 is a V-shaped groove that clamps onto two adjacent sides of the locking nut 11, so that the first chuck assembly 5 can stably clamp the locking nut 11, while also being universal for locking nuts 11 of different sizes. Or, as Figure 9 As shown, the outer cylindrical surface of the locking nut 11 is machined to form two parallel planes. The clamping structure 513 is a contact plane that fits against the planes, so that the first chuck assembly 5 can stably clamp the locking nut 11, while also being universal for locking nuts 11 of different sizes. Or, as Figure 10 As shown, two concave hook grooves are symmetrically machined on the outer circular surface of the locking nut 11. The clamping structure 513 is a snap-fit ​​protrusion connected to the inner side wall and protruding outward to be engaged in the hook groove, so that the first chuck assembly 5 can stably clamp the locking nut 11, and at the same time it is universal for locking nuts 11 of different sizes.

[0027] Optionally, such as Figure 2 and Figure 3 As shown, the force-applying drive assembly 6 includes a mounting screw 61, a force-applying nut 62 sequentially mounted on the outer circumference of the mounting screw 61, and a sensor 63. The mounting screw 61 is vertically positioned, with its lower end threaded to the base 2. The upper end of the mounting screw 61 passes through the outer end of one of the lever shafts 512 in the first clamp assembly 5. The sensor 63 is supported on the lever shaft 512 through which the mounting screw 61 passes. The force-applying nut 62 is located above the sensor 63, allowing it to be lowered by external force, thus pressing down and pushing the sensor 63, which in turn presses down and pushes the outer end of the lever shaft 512. The sensor 63 is used to read the axial force applied to the mounting screw 61, thereby accurately measuring the applied torque for precise tightening of the fasteners during assembly. When it is necessary to disassemble the locking nut 11, the mounting screw 61 is installed onto the base 2 through the through hole of the first clamp 51, and then the sensor 63 and the force-applying nut 62 are assembled, as follows. Figure 2 As shown in (AA), a torque wrench is then used to apply torque to the force-applying nut 62 (hydraulic methods can also be used instead). The sensor 63 monitors and gradually increases the load. Through the lever arm (amplification effect) of the first clamping head 51, the torque is amplified tens of times and transmitted to the locking nut 11, which is then removed from the long shaft at the first end. When it is necessary to tighten the locking nut 11, the operation steps are the same as those for disassembling the locking nut 11, except that the mounting screw 61 is threaded through and connected to the second set of first clamping heads 51, while the support rod assembly 4 is supported on the first set of first clamping heads 51, as shown. Figure 3 As shown in (A1-A1).

[0028] Preferably, such as Figure 3 and Figure 7As shown, the force-applying drive assembly 6 also includes an intermediate hydraulic actuator 64, which is installed between the sensor 63 and the first clamping head 51, to automatically apply force to the first clamping head 51 below via hydraulic means, while acting in the opposite direction on the sensor 63. The intermediate hydraulic actuator 64 is used to replace the force-applying nut 62 in applying force.

[0029] Optionally, such as Figure 2 and Figure 3 As shown, the support rod assembly 4 includes a support rod 41, an adjusting pad 42 for adjusting the support height of the support rod 41, and multiple sets of second fastening connectors 43. The adjusting pad 42 is supported on the base platform 2. The support rod 41 is vertically arranged, and its bottom end is supported on the adjusting pad 42 and detachably connected to the base platform 2 through multiple sets of second fastening connectors 43. The upper end of the support rod 41 is used to tighten the bottom end of one set of first clamping heads 51 upwards, and the upper end of the force-applying drive assembly 6 is connected to another set of first clamping heads 51. In actual operation, the support height of the support rod 41 is adjusted by setting the number of adjusting pads 42.

[0030] Optionally, such as Figure 4 and Figure 7 As shown, the support clamping assembly 3 includes a second chuck assembly 31, two sets of micro-motion connecting blocks 32 connected to opposite sides of the second chuck assembly 31, and two sets of support seats 33 respectively disposed on opposite sides of the second end long shaft. The second chuck assembly 31 is used to clamp the second end long shaft from opposite sides or to lock nuts 11 mounted on the outer circle of the second end long shaft. The two sets of support seats 33 are respectively vertically arranged and their bottom ends are respectively connected to the base platform 2. The upper ends of the two sets of support seats 33 are respectively provided with mounting ports 331 for installing the two sets of micro-motion connecting blocks 32. The two sets of micro-motion connecting blocks 32 are disposed in the two mounting ports 331, and the micro-motion connecting blocks 32 are movably connected to the mounting ports 331 on the corresponding side to prevent the tester 1 from being completely jammed by the support clamping assembly 3.

[0031] In this optional solution, such as Figure 4 As shown, the second clamp assembly 31 has the same structure as the first clamp assembly 5, and has two lever shafts 512 extending cantilevered to opposite sides of the second end long axis. The two lever shafts 512 are respectively threaded through two sets of micro-motion connecting blocks 32 on both sides, and are rotatably connected to the corresponding micro-motion connecting blocks 32, so that the second clamp assembly 31 has a certain degree of freedom and avoids the tester 1 from being "stiffened" by force.

[0032] In this optional solution, such as Figure 5 and Figure 7As shown, each set of support bases 33 includes a support 332 vertically mounted on the base, a cover plate 333, a third fastening connector 334, and multiple sets of fourth fastening connectors 335. The lower end of the support 332 is detachably connected to the base platform 2 via the third fastening connector 334. The upper end of the support 332 extends inward from its top end to form a mounting opening 331, which penetrates the support 332 along its thickness direction. The cover plate 333 covers the top end of the support 332 and is detachably connected to the support 332 via multiple sets of fourth fastening connectors 335 to close the upper opening of the mounting opening 331. The micro-motion connecting block 32 is located in the mounting port 331, and its upper and lower surfaces contact the cover plate 333 and the bottom surface of the mounting port 331, respectively. The left and right surfaces of the micro-motion connecting block 32 are spaced apart from the corresponding left and right surfaces of the mounting port 331, thus ensuring that this part has left and right swing freedom. This ensures that when a load is applied to the torque end (the first long axis of the tester 1), no load other than torque is applied to the object being disassembled (tester 1), protecting the object being disassembled. In this optional solution, such as... Figure 4 and Figure 7 As shown, the bottom end of the support 332 has a U-shaped notch, and the base 2 is provided with a corresponding T-shaped groove 201. The support 332 slides freely in the T-shaped groove of the base 2 through the third fastening connector 334 connected in the U-shaped notch, so that the support clamping assembly 3 can flexibly adapt to the distance between the locking nuts of the operated equipment.

[0033] Optionally, such as Figure 1 and Figure 7 As shown, the high-torque nut removal and tightening device also includes a lifting assembly 7. The lifting assembly 7 includes a lifting plate 72, a lifting ring 73, and multiple sets of sixth fastening connectors 74, all detachably connected to one end of the base platform 2 along its length via multiple sets of fifth fastening connectors 71. The upper end of the lifting plate 72 has a slotted hole extending through the plate surface and along its height. One end of the lifting ring 73 is slidably connected to the slotted hole via the sixth fastening connectors 74. During operation, a crane is used to lift the entire device to a vertical position, such as... Figure 8 As shown, the locking nut 11 in the vertical position of the equipment is disassembled and tightened accurately.

[0034] Optionally, let T be the disassembly torque required to remove the locking nut 11, and S be the distance between opposite sides of the locking nut 11, then: F is the tensile load required to disassemble and tighten the nut 11. During the design process, the first chuck assembly 5 needs to be designed to withstand at least this load F.

[0035] The specific procedures during work are as follows: like Figure 2As shown in (AA), two first clamping heads 51 are installed to clamp the locking nut 11, and then the two first clamping heads 51 are connected and fixed by several sets of first fastening connectors 52 (including bolts and nuts); Install the support rod 41 and the adjusting pad 42 onto the base 2, and fix them with two sets of second fastening connectors 43; like Figure 5 As shown, the micro-motion connecting block 32 is assembled onto the second clamping head of the second chuck assembly 31, and another micro-motion connecting block 32 is assembled onto the second clamping head of another second chuck assembly 31; the two micro-motion connecting blocks 32 are respectively assembled into the mounting port 331 of the support 332, and then two cover plates 333 are assembled, and the cover plates 333 are respectively connected and fixed to the support 332 with four fourth fastening connectors 335; like Figure 3 As shown, two support seats 33 are connected to the base platform 2 via a T-shaped rail. By sliding the support seats 33, the two second clamping heads clamp the locking nuts. Then, the support seats 33 are installed and fixed using two sets of third fastening connectors 334. The two second clamping heads are connected and fixed using several sets of bolts and nuts. like Figure 1 As shown, the hanging plate 72 is assembled onto the base 2 and fixed with 3 sets of fifth fastening connectors 71; the lifting ring 73 is passed through the waist-shaped hole of the hanging plate 72 and fixed with 2 sets of sixth fastening connectors 74. During the disassembly stage of locking nut 11, the mounting screw 61 is inserted through the through hole of the first clamping head 51 and installed onto the base 2. Then, the sensor 63 and the force-applying nut 62 are assembled, as follows. Figure 2 As shown in (AA); A torque is applied to the force-applying nut 62 using a torque wrench, and the load is gradually increased by the sensor 63. The torque is amplified by tens of times and transmitted to the locking nut 11 through the lever arm (amplification effect) of the first clamping head 51, so that it can be disassembled and removed from the first end long shaft. During the assembly and tightening stage of locking nut 11, remove the force-applying nut 62, sensor 63, and mounting screw 61. Insert the mounting screw 61 through the through hole of the second first clamping head 51 and install it onto the base platform 2. Then assemble the intermediate hydraulic actuator 64, sensor 63, and force-applying nut 62, as follows: Figure 3 As shown; Manual pressure is applied to the intermediate hydraulic actuator 64 to apply axial force to the mounting screw 61. The load is monitored by the sensor 63 and gradually increased. Through the lever arm (amplification effect) of the second set of first clamping heads 51, the torque is amplified by tens of times and transmitted to the locking nut 11. The tightening torque of the locking nut 11 is accurately determined by the reading of the sensor 63. The base platform has lifting rings 73 on its two end faces, allowing the entire device to be lifted vertically using a crane. (See...) Figure 8The locking nut 11 in the vertical position of the equipment is disassembled and tightened accurately.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A device for disassembling and tightening a high-torque nut, characterized in that, For disassembling or tightening the locking nut (11) on the tester (1), wherein the tester (1) has a first end long shaft and a second end long shaft extending axially at both ends, and at least the outer circle of the first end long shaft has a locking nut (11), the high torque nut disassembly and tightening device includes: The base (2) which serves as the installation support, the support clamping assembly (3) and the support rod assembly (4) which are vertically supported on the base (2), the first clamp assembly (5) and the force application drive assembly (6). The support clamping assembly (3) and the support rod assembly (4) are arranged sequentially at intervals along the axial direction of the tester (1), and the support rod assembly (4) is arranged close to the first end long shaft, and the support clamping assembly (3) is arranged close to the second end long shaft. The support clamping assembly (3) is used to clamp the second end long shaft from both sides or to install the locking nut (11) on the outer circle of the second end long shaft to prevent the tester (1) from rotating when the locking nut (11) on the outer circle of the first end long shaft is disassembled or tightened. The first chuck assembly (5) is used to clamp the locking nut (11) mounted on the outer circle of the first long shaft from both sides of the first end. The support rod assembly (4) is used to support the first chuck assembly (5) and works in conjunction with the support clamping assembly (3) to stably support the tester (1). The first chuck assembly (5) has lever shafts (512) that extend into cantilever arms on opposite sides along the long axis of the first end. The force-applying drive assembly (6) is vertically supported on the base (2) and its upper end is connected to the outer end of one of the lever shafts (512) so that the first chuck assembly (5) can clamp the locking nut (11) and rotate it by a set angle under the action of downward pressure to disassemble or tighten. The support clamping assembly (3) includes a second chuck assembly (31), two sets of micro-motion connecting blocks (32) connected to opposite sides of the second chuck assembly (31), and two sets of support seats (33) respectively disposed on opposite sides of the second end long shaft; the second chuck assembly (31) is used to clamp the second end long shaft from opposite sides or to install a locking nut (11) on the outer circle of the second end long shaft; the two sets of support seats (33) are respectively vertically arranged and their bottom ends are respectively connected to the base platform (2), and the upper ends of the two sets of support seats (33) are respectively provided with mounting ports (331) for installing the two sets of micro-motion connecting blocks (32). The two sets of micro-motion connecting blocks (32) are respectively disposed in the two mounting ports (331), and the micro-motion connecting blocks (32) are movably connected to the mounting ports (331) on the corresponding side to avoid the tester (1) being completely jammed by the support clamping assembly (3).

2. The high-torque nut disassembly and tightening device according to claim 1, characterized in that, The first clamping assembly (5) includes two sets of first clamping heads (51) arranged opposite to each other, and multiple sets of first fastening connectors (52). Two sets of first clamping heads (51) are used to clamp the locking nut (11) from both sides of the first end long shaft. Multiple sets of first fastening connectors (52) are connected between the two sets of first clamping heads (51) to tighten and lock the two sets of first clamping heads (51) respectively. Each first clamping head (51) includes a clamping head (511) and a lever shaft (512) connecting the clamping head (511).

3. The high-torque nut disassembly and tightening device according to claim 2, characterized in that, A clamping structure (513) is provided on the inner sidewall of the clamp head (511) for contacting the locking nut (11). The locking nut (11) has a regular polygonal structure, and the clamping structure (513) is a V-shaped groove that clamps onto two adjacent sides of the locking nut (11); or The outer cylindrical surface of the locking nut (11) is machined to form two parallel planes, and the clamping structure (513) is a mating plane that fits against the planes; or The locking nut (11) has two concave hook grooves symmetrically machined on its outer circular surface. The clamping structure (513) is a convex protrusion connected to the inner side wall for engaging with the hook grooves.

4. The high-torque nut disassembly and tightening device according to claim 2, characterized in that, The force-applying drive assembly (6) includes a mounting screw (61), a force-applying nut (62) and a sensor (63) sequentially mounted on the outer circle of the mounting screw (61). The mounting screw (61) is vertically set and its lower end is used to be threaded to the base (2). The upper end of the mounting screw (61) is used to pass through the outer end of one of the lever shafts (512) in the first chuck assembly (5). The sensor (63) is supported on the lever shaft (512) through which the mounting screw (61) passes. The force-applying nut (62) is located above the sensor (63) to be moved down by external force and thus press down and push the sensor (63), thereby causing the sensor (63) to press down and push the outer end of the lever shaft (512).

5. The high-torque nut disassembly and tightening device according to claim 2, characterized in that, The strut assembly (4) includes a strut (41), an adjustment pad (42) for adjusting the support height of the strut (41), and multiple sets of second fastening connectors (43). The adjusting pad (42) is supported on the base (2), the support rod (41) is set vertically, and its bottom end is supported on the adjusting pad (42) and is detachably connected to the base (2) through multiple sets of second fastening connectors (43). The upper end of the support rod (41) is used to support the bottom end of one set of first clamping heads (51) upward, and the upper end of the force driving assembly (6) is connected to another set of first clamping heads (51).

6. The high-torque nut disassembly and tightening device according to claim 2, characterized in that, The second clamp assembly (31) has the same structure as the first clamp assembly (5), and has two lever shafts (512) extending into cantilever arms on opposite sides of the second end long axis. Two lever shafts (512) are respectively threaded through two sets of micro-motion connecting blocks (32) on both sides, and are rotatably connected to the corresponding micro-motion connecting block (32).

7. The high-torque nut disassembly and tightening device according to claim 2, characterized in that, Each set of support bases (33) includes a support (332) vertically mounted on the base, a cover plate (333), a third fastening connector (334), and multiple sets of fourth fastening connectors (335); The lower end of the support (332) is detachably connected to the base (2) through the third fastening connector (334). The upper end of the support (332) extends from its top end to form an installation port (331), and the installation port (331) penetrates the support (332) along the thickness direction of the support (332). The cover plate (333) is placed on the top of the support (332) and is detachably connected to the support (332) by multiple sets of fourth fastening connectors (335) to close the upper opening of the mounting port (331); The micro-motion connecting block (32) is located in the mounting port (331), and the upper and lower surfaces of the micro-motion connecting block (32) are in contact with the bottom surface of the cover plate (333) and the mounting port (331) respectively. The left and right surfaces of the micro-motion connecting block (32) are respectively separated from the left and right surfaces of the mounting port (331).

8. The high-torque nut disassembly and tightening device according to claim 1, characterized in that, The high-torque nut removal and tightening device also includes a hoisting assembly (7), which includes a lifting plate (72), a lifting ring (73), and a set of sixth fastening connectors (74) that are detachably connected to one end of the base (2) in the length direction via multiple sets of fifth fastening connectors (71). The upper end of the hanging plate (72) is provided with a waist-shaped hole that penetrates the plate surface and extends along the height direction; One end of the lifting ring (73) is slidably connected to the waist-shaped hole via the sixth fastening connector (74).

9. The high-torque nut disassembly and tightening device according to claim 1, characterized in that, Let T be the disassembly torque required to remove the locking nut (11), and S be the distance between opposite sides of the locking nut (11), then: , where F is the tensile load required to remove the unlocking nut (11).

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