A tool for large post and nut assembly

Abstract

The application provides a tool for assembling large columns and nuts, and relates to the technical field of mechanical equipment. The tool for assembling large columns and nuts comprises at least two column axial displacement brackets and a nut rotating bracket, the two column axial displacement brackets and the nut rotating bracket are arranged horizontally and spaced apart in the same direction, a column drag wheel is arranged on the top of the column axial displacement bracket and rotates, the wheel surface of the column drag wheel is used for rolling fit with the circumferential surface of the column in the axial direction of the column, and the top of the nut rotating bracket is provided with two nut drag wheels, and the wheel surfaces of the two nut drag wheels are used for rolling fit with the outer circumferential surface of the nut.

Description

Technical Field

[0001] This invention relates to the field of mechanical equipment technology, and more specifically, to a tool for assembling large columns and nuts. Background Technology

[0002] In heavy-duty hydraulic shearing equipment in the metallurgical industry, the vertical guidance and reciprocating shearing motion of the upper and lower shear blades are highly dependent on the precise installation of the column. As the core load-bearing and positioning component of the equipment, the column is characterized by its large overall size, extremely high weight, and stringent assembly precision requirements. The ends of the column must be axially positioned and pre-tightened using lock nuts to ensure the stability of the shear blade operation and the shearing accuracy.

[0003] However, in existing assembly operations, both the oversized columns and locking nuts are heavy components, lacking dedicated assembly auxiliary tooling. The entire process relies on overhead cranes combined with manual alignment and tightening. This process results in the columns and nuts being extremely heavy, making precise manual alignment difficult. Initial deviations in thread engagement are significantly increased, easily leading to thread chipping, damage, and tangled threads, severely compromising thread fit accuracy and drastically shortening equipment lifespan. Simultaneously, the lack of effective centering supports and horizontal limiting devices during nut tightening causes severe hoisting sway, making it difficult to control assembly coaxiality and easily leading to nut locking due to uneven load distribution and preload. Furthermore, the overall assembly process heavily depends on the experience of skilled technicians, resulting in low assembly efficiency, excessive labor intensity, and high safety risks such as crushing and falling during heavy component hoisting and alignment, posing a serious threat to operators. Summary of the Invention

[0004] The problem this invention addresses is how to effectively solve the difficulties in the assembly process of the column and nut, so as to improve assembly efficiency.

[0005] To address the aforementioned problems, this invention provides a tool for assembling large columns and nuts, comprising at least two column axial displacement brackets and a nut rotation bracket. The two column axial displacement brackets and the nut rotation bracket are arranged horizontally at intervals in the same direction. A column roller is rotatably mounted on the top of each column axial displacement bracket, and the wheel surface of the column roller is used for rolling engagement with the circumferential surface of the column along the axial direction. Two nut rollers are mounted on the top of the nut rotation bracket, and the wheel surfaces of the two nut rollers are used for rolling engagement with the outer circumferential surface of the nut.

[0006] Optionally, the column axial displacement bracket includes a first support and a second support, the first support being rotatably connected to the column roller, and the first support slidingly engaging with the second support along the radial direction of the column.

[0007] Optionally, the column axial displacement bracket further includes a fixedly installed third support, the second support being located on top of the third support and slidingly engaging with the third support through a first wedge-shaped surface.

[0008] Optionally, the column axial displacement bracket further includes a first fastener, which is used to limit the sliding of the second support and the third support.

[0009] Optionally, the diameter of the column-mounted roller gradually increases from the middle to both ends along its axial direction.

[0010] Optionally, the nut rotating bracket includes two first support seats and a second support seat. The first support seats are rotatably connected to the nut drag wheels in a one-to-one correspondence. Both first support seats are slidably engaged with the second support seats along the radial direction of the column.

[0011] Optionally, the nut rotating bracket further includes a third support, the second support being located on top of the third support and slidingly engaged with the third support via a second wedge-shaped surface.

[0012] Optionally, the nut rotating bracket further includes a second fastener for limiting the sliding of the third support and the second support.

[0013] Optionally, the column axial displacement bracket further includes a first locking member, which is used to restrict the sliding of the first support and the second support.

[0014] Optionally, the nut rotating bracket further includes a second locking member for limiting the sliding of the first support and the second support.

[0015] Compared with related technologies, the tool for assembling large columns and nuts in this invention provides a foundation for the horizontal placement of the column by arranging at least two horizontally spaced column axial displacement brackets. The column's stability is ensured by the rolling engagement between the column's circumferential surface and the wheel surfaces of the column support rollers. The column support rollers slide along the column's axial direction and onto its circumferential surface, limiting the column's movement direction and ensuring accurate subsequent movement. Two nut support rollers are rotatably mounted on the top of a threaded rotating bracket, with the outer circumferential surface of the nut rolling into the wheel surfaces of the two nut support rollers. These rollers support the nut and ensure that the nut is positioned within the two nut support rollers. Supported by the towing wheel, it can rotate around its own axis. The column axial displacement bracket and the nut rotation bracket are arranged horizontally in the same direction, ensuring that the column and nut are distributed in the same direction during assembly. When the nut rotates, the threaded connection between the column and nut drives the column to move axially until the threaded connection is complete. This avoids thread damage caused by manual alignment deviations, ensures coaxiality control, effectively solves the problem of thread damage caused by alignment difficulties during column and nut assembly, ensures assembly coaxiality, improves assembly efficiency, and reduces safety risks. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the axial displacement bracket for the column in an embodiment of the present invention; Figure 2 This is a schematic diagram of the column axial displacement bracket supporting the column in an embodiment of the present invention; Figure 3 This is a schematic diagram of the nut rotating bracket in an embodiment of the present invention; Figure 4 This is a schematic diagram of the column and nut fitting together in an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures: 1-Column axial displacement bracket; 11-Column roller; 12-First support; 13-Second support; 14-Third support; 15-First fastener; 16-First locking element; 2-Nut rotating bracket; 21-Nut roller; 22-First support seat; 23-Second support seat; 24-Third support seat; 25-Second fastener; 26-Second locking element. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] In the attached figures, the X-axis represents left and right positions, with the positive direction of the X-axis representing the right side and the negative direction representing the left side; the Y-axis represents front and back positions, with the positive direction of the Y-axis representing the front and the negative direction representing the back; and the Z-axis represents up and down positions, with the positive direction of the Z-axis representing the top and the negative direction representing the bottom. It should be noted that the aforementioned representations of the X, Y, and Z axes are merely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0020] It should be noted that the terms "first," "second," etc., used in the specification and claims of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein.

[0021] Combination Figures 1 to 4 As shown, this embodiment of the invention provides a tool for assembling large columns and nuts, including at least two column axial displacement brackets 1 and a nut rotation bracket 2. The two column axial displacement brackets 1 and the nut rotation bracket 2 are arranged horizontally at intervals in the same direction. A column drag wheel 11 is rotatably provided on the top of the column axial displacement bracket 1. The wheel surface of the column drag wheel 11 is used to roll and engage with the circumferential surface of the column 3 along the axial direction of the column 3. Two nut drag wheels 21 are provided on the top of the nut rotation bracket 2. The wheel surfaces of the two nut drag wheels 21 are used to roll and engage with the outer circumferential surface of the nut 4.

[0022] Specifically, the column axial displacement bracket 1 and the nut rotation bracket 2 are located on the horizontal plane and are arranged at intervals along the Y-axis. The number of column axial displacement brackets 1 is at least two. Figure 4As shown, two column axial displacement brackets 1 are located on one side of the positive Y-axis, and the nut rotation bracket 2 is located on one side of the negative Y-axis. Each column axial displacement bracket 1 has a column roller 11 at its top, which can rotate around its own axis. The nut rotation bracket 2 has two nut rollers 21 at its top, spaced apart along the X-axis, with their surfaces rolling into the outer circumferential surface of the nut 4. It should be noted that in this embodiment, the outer circumferential surface of the nut 4 is a smooth curved surface. When assembling the column 3 and nut 4, the column 3 is hoisted by an overhead crane and placed horizontally on the two column axial displacement brackets 1. After the overhead crane is removed, the two column rollers 11 fully roll into the circumferential surface of the column 3. Then, the nut 4 is hoisted by an overhead crane. The nut 4 is supported by two nut rollers 21. Since the column 3 rolls with the column rollers 11 along its axis, the column 3 can be pushed before the nut 4 rotates, so that the threaded end of the column 3 extends into the internal thread hole of the nut 4. Then, the nut 4 is rotated, and the two nut rollers 21 rotate with the nut 4, ensuring that the nut 4 only rotates around its axis (the rotation of the two nut rollers 21 can also drive the nut 4 to rotate). Through the threaded connection, the rotating nut 4 drives the column 3 to move along its axis, and during the movement of the column 3, the column rollers 11 ensure the accuracy of the direction of movement of the column 3.

[0023] Therefore, in this embodiment, at least two column axial displacement brackets 1 are arranged horizontally at intervals to provide a foundation for the flat placement of the column 3. After the circumferential surface of the column 3 rolls with the wheel surface of the column roller 11, the stability of the column 3 is ensured. The column roller 11 slides with the circumferential surface of the column 3 along the axial direction, restricting the movement direction of the column 3 and ensuring the accuracy of the subsequent movement direction of the column 3. Two nut rollers 21 are rotatably set on the top of the threaded rotating bracket 2, and the outer circumferential surface of the nut 4 rolls with the wheel surface of the two nut rollers 21. The two nut rollers 21 support the nut 4, and make the nut 4 roll with the two nut rollers 21. Supported by the support, it can rotate around its own axis. Then, through the column axial displacement bracket 1 and the nut rotation bracket 2, which are arranged horizontally at intervals in the same direction, it is ensured that the column 3 and nut 4 are distributed in the same direction during the assembly process. Thus, when the nut 4 rotates, the threaded connection between the column 3 and the nut 4 can drive the column 3 to move along its axis until the threaded connection between the column 3 and the nut 4 is completed. This can avoid thread damage caused by manual alignment deviation, ensure coaxiality control, effectively solve the problem of thread damage caused by difficulty in centering during the assembly of the column and nut, ensure assembly coaxiality, improve assembly efficiency, and reduce safety risks.

[0024] Optionally, combined Figure 1As shown, the column axial displacement bracket 1 includes a first support 12 and a second support 13. The first support 12 is rotatably connected to the column drag wheel 11, and the first support 12 slides with the second support 13 along the radial direction of the column 3.

[0025] Specifically, such as Figure 1 As shown, in this embodiment, the radial direction of the column 3 refers to the direction parallel to the X-axis. The first support 12 is located at the upper end of the second support 13 and is slidably connected to the second support 13 along the X-axis direction. For example, the bottom of the first support 12 is provided with a protrusion, and the upper end of the second support 13 is provided with a groove. The length direction of the protrusion and the groove is parallel to the X-axis, and the protrusion and the groove are slidably engaged. The column roller 11 is rotatably mounted on the upper end of the first support 12, that is, from top to bottom, the column roller 11, the first support 12, and the second support 13 are distributed in sequence.

[0026] Thus, through the rotatable connection between the first support 12 and the column roller 11, and the sliding engagement of the first support 12 with the second support 13 along the radial direction of the column 3, the sliding of the first support 12 relative to the second support 13 can change the position of the column roller 11 in the radial direction of the column 3. This allows the assembly personnel to adjust the position of the first support 12 on the second support 13 according to the actual alignment deviation between the column 3 and the nut 4, ensuring that the wheel surface of each column roller 11 can fully contact the circumferential surface of the column 3. This effectively solves the problem of the large column 3 being difficult to align accurately under gravity, provides the necessary spatial position compensation for the smooth engagement of the nut 4 and the column 3, significantly reduces the risk of thread profile collision, chipping, and tangled threads, thereby improving the thread fit accuracy and equipment service life, simplifying the assembly process, reducing reliance on the experience of skilled technicians, and improving assembly efficiency and safety.

[0027] Optionally, combined Figure 1 As shown, the column axial displacement bracket 1 also includes a fixedly installed third support 14, and the second support 13 is located on top of the third support 14 and slides with the third support 14 through the first wedge-shaped surface.

[0028] Specifically, such as Figure 1 As shown, the top of the third support 14 and the bottom of the second support 13 are slidably engaged by a first wedge-shaped surface, with the end of the first wedge-shaped surface in the positive X-axis direction higher than the end in the negative X-axis direction. When the second support 13 slides relative to the third support 14, the height of the column roller 11 can be adjusted.

[0029] Thus, with the second support 13 located on top of the third support 14 and slidingly engaged with the third support 14 through the first wedge-shaped surface, the third support 14 can serve as a stable fixed base, providing a solid foundation for the entire radial adjustment mechanism. This ensures that the adjustment mechanism will not shake or shift when bearing the huge weight of the column 3. At the same time, the sliding of the second support 13 relative to the third support 14 allows for the adjustment of the height of the column rollers 11, thereby ensuring that each column roller 11 maintains the same height and ensuring the stability of the column 3 when placed horizontally.

[0030] Optionally, combined Figure 1 As shown, the column axial displacement bracket 1 also includes a first fastener 15, which is used to limit the sliding of the second support 13 and the third support 14.

[0031] Specifically, the first fastener 15 can be implemented in various ways. For example, a combination of bolts and nuts can be used. By providing through holes in the second support 13 and the third support 14, the bolts can pass through and be tightened with nuts, thereby generating axial preload to press the two supports tightly together and restrict their slippage. Alternatively, mechanical clamping mechanisms such as wedges or eccentric wheels can be used. Through their own structural design, they can generate lateral or radial clamping forces during operation to lock the second support 13 and the third support 14 in a preset position.

[0032] Thus, by using the first fastener 15 to restrict the sliding of the second support 13 and the third support 14, after the second support 13 and the third support 14 have achieved fine adjustment of their radial positions through the first wedge surface, the first fastener 15 can forcibly fix them together. This can effectively eliminate the risk of sliding caused by external vibration, gravity load or assembly force, which ensures that the column 3 always maintains the preset support position and posture during the assembly process, thereby avoiding assembly deviation caused by loose support structure, significantly improving the stability and reliability of the assembly process of the large column 3 and nut 4, and effectively ensuring assembly accuracy and work safety.

[0033] Optionally, combined Figure 1 As shown, the diameter of the column-mounted towing wheel 11 gradually increases from the middle to both ends along its axial direction.

[0034] Specifically, the wheel surface of the column-mounted tow wheel 11 is designed as a drum-shaped or waist-drum-shaped structure. For example, its wheel surface can be formed by two opposing conical surfaces meeting in the middle, so that the minimum diameter is located in the middle and gradually increases towards both ends; or, its wheel surface can be designed as an arc-shaped surface with continuous curvature, such as using a parabolic or hyperbolic cross-sectional profile, so as to achieve a smooth transition increase in diameter from the middle to both ends.

[0035] Thus, by gradually increasing the diameter of the column roller 11 along its axial direction from the center to both ends, when the column 3 experiences a slight misalignment, the difference in diameter between the contact point between the column 3 and the roller surface generates a restoring force pointing towards the center. This causes the column 3 to automatically return to the center position of the column roller 11, effectively preventing lateral swaying caused by the column 3 deviating from the center during rolling. This not only enhances the stability of the column 3 during axial movement but also reduces local wear between the circumferential surface of the column 3 and the column roller 11 by optimizing the stress distribution in the contact area, providing a reliable physical support foundation for achieving high-precision column and nut assembly.

[0036] Optionally, combined Figure 3 As shown, the nut rotating bracket 2 includes two first support seats 22 and a second support seat 23. The first support seats 22 are rotatably connected to the nut drag wheel 21 in a one-to-one correspondence. Both first support seats 22 are slidably engaged with the second support seats 23 along the radial direction of the column 3.

[0037] Specifically, the first support base 22 and the nut pulley 21 are rotatably connected in a one-to-one correspondence. For example, the nut pulley 21 can be rotatably mounted on the upper end of the corresponding first support base 22 via a bearing. Both first support bases 22 are slidably engaged with the second support base 23 along the radial direction of the column 3.

[0038] Thus, by mounting the nut rollers 21 on two first support seats 22 that can slide radially along the column 3, and making the first support seats 22 and second support seats 23 slide in engagement, precise radial adjustment of the support point of the nut 4 is achieved. That is, during the assembly process, the operator can independently or synchronously adjust the radial position of the two first support seats 22 according to the actual size of the nut 4 and its relative position to the column 3, thereby precisely controlling the support point of the nut rollers 21 on the nut 4. This adjustability ensures that the nut 4 remains coaxial with the height of the column 3 during rotation and engagement, effectively avoiding problems such as thread collision, biting, and tangled threads caused by eccentricity or shaking of the nut 4, significantly improving the accuracy of thread engagement and assembly quality. At the same time, it also avoids the nut 4 from being locked due to uneven load, ensuring the uniformity of preload, thereby extending the service life of the equipment, reducing the reliance on the experience of skilled technicians, and improving assembly efficiency and safety.

[0039] Optionally, combined Figure 3 As shown, the nut rotating bracket 2 also includes a third support 24, and a second support 23 is located on top of the third support 24 and slides with the third support 24 through a second wedge-shaped surface.

[0040] Specifically, the second wedge surface is similar to the first wedge surface, with the second wedge surface located at the end height in the positive direction of the X-axis and at the end height in the negative direction of the X-axis.

[0041] Thus, with the second support 23 positioned on top of the third support 24 and slidingly engaged with it via the second wedge-shaped surface, when the height of the nut 4 needs adjustment, the second support 23 is driven to slide horizontally on the second wedge-shaped surface of the third support 24. This horizontal displacement is precisely converted into a small vertical rise or fall, allowing the nut 4 to quickly and accurately achieve optimal coaxiality and height matching when threadedly engaging with the column 3. This significantly reduces assembly difficulty and time, avoiding the difficulties and time-consuming nature of traditional manual alignment or rough adjustments. It also effectively reduces the risk of thread chipping, damage, and tangled threads, thus protecting the thread fit accuracy and equipment lifespan. Simultaneously, the wedge-shaped surface structure provides adjustment functionality while ensuring stable support for the heavy-duty nut 4, preventing wobbling and uneven loading during assembly.

[0042] Optionally, combined Figure 3 As shown, the nut rotating bracket 2 also includes a second fastener 25, which is used to limit the sliding of the third support 24 and the second support 23.

[0043] Specifically, the second fastener 25 can be implemented in various forms. For example, it can be a set of bolts and nuts, whereby the bolts are passed through pre-drilled through holes or slots in the second support 23 and the third support 24, and the nuts are tightened, thereby generating sufficient clamping force between them to limit relative sliding. The combination of bolts and nuts can be selected according to the required clamping force and structural space, for example, using high-strength bolts or self-locking nuts to enhance the fastening effect. In addition, the second fastener 25 can also be a wedge or tapered pin structure, whereby the wedge or tapered pin is inserted into a pre-set mating groove between the second support 23 and the third support 24, utilizing the wedge effect to generate expansion force or friction force, thereby limiting relative sliding between them.

[0044] Thus, the second fastener 25 reliably restricts the sliding between the second support 23 and the third support 24, ensuring the structural stability of the nut rotation bracket 2 when supporting the nut 4. Specifically, during the assembly process of the nut 4 and the column 3, the presence of the second fastener 25 ensures that the nut 4 supported by the nut pulley 21 maintains precise alignment, preventing eccentric loading, tilting, or decreased alignment accuracy of the nut 4 due to relative sliding between the second support 23 and the third support 24. This significantly reduces the risk of thread chipping, damage, and tangled threads, protecting the thread fit accuracy and extending the equipment's service life. Furthermore, it improves the coaxiality of the assembly process, ensuring the smoothness of the nut 4's engagement and the uniformity of the preload.

[0045] Optionally, combined Figure 1As shown, the column axial displacement bracket 1 also includes a first locking member 16, which is used to restrict the sliding of the first support 12 and the second support 13.

[0046] Specifically, the first locking element 16 can be implemented in various forms. For example, it can be a bolt and nut fastening structure, where through holes are provided on the first support 12 and the second support 13, and bolts are passed through these through holes and then tightened with nuts to firmly connect the two together. Alternatively, the first locking element 16 can also be a wedge locking structure, where wedge-shaped grooves are provided on the sliding surfaces of the first support 12 and the second support 13, and wedges are inserted or pressed in, using the self-locking action or friction generated by the wedges to limit sliding.

[0047] Thus, during the assembly of the large column 3 and nut 4, the column axial displacement bracket 1 needs to be adjusted according to the radial dimension of the column 3 to ensure that the column support roller 11 can stably support the column 3. Once the radial position adjustment is completed, the first locking member 16 can firmly lock the first support 12 and the second support 13 together, thereby eliminating the gaps and shaking that may be caused by the sliding fit. This ensures that the support point of the column 3 remains in the preset precise position throughout the entire assembly process, avoiding the offset of the column 3 axis caused by the loosening of the support structure, thereby significantly improving the alignment accuracy and stability during the assembly of the column 3 and nut 4, effectively preventing problems such as thread collision and chipping, and thus ensuring the quality of the thread fit and the service life of the equipment.

[0048] Optionally, combined Figure 3 As shown, the nut rotating bracket 2 also includes a second locking member 26, which is used to restrict the sliding of the first support 22 and the second support 23.

[0049] Specifically, the second locking element 26 can be implemented in various ways. For example, the second locking element 26 can be a combination of bolts and nuts, which are inserted and tightened through pre-drilled through holes or threaded holes in the first support 22 and the second support 23 to generate clamping force and securely fix the two together. Alternatively, the second locking element 26 can be designed as a wedge structure, which can be inserted into a pre-set wedge groove between the first support 22 and the second support 23. The wedge is pressed together by its self-locking action or by fasteners (such as set screws) to restrict sliding.

[0050] Thus, the second locking member 26 effectively restricts the sliding of the first support 22 and the second support 23, fixing the radial position of the nut pulley 21. That is, during the assembly of the large column 3 and the nut 4, even if the nut 4 generates radial force when rotating or moving on the nut pulley 21, the second locking member 26 can effectively resist these forces, preventing unexpected displacement of the support. This ensures that the nut rotating bracket 2 maintains a constant alignment when supporting the nut 4, avoiding coaxiality deviations caused by loose support structures. Especially after the first support 22 and the second support 23 are adjusted to their relative positions through sliding engagement to adapt to different sizes or alignment requirements, the second locking member 26 can firmly lock this adjusted position, thereby maintaining adjustment flexibility while ensuring stability during assembly, providing a reliable structural guarantee for the precise assembly of the large column 3 and the nut 4.

[0051] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A tool for assembling large columns and nuts, characterized in that, It includes at least two column axial displacement brackets (1) and a nut rotation bracket (2). The two column axial displacement brackets (1) and the nut rotation bracket (2) are arranged horizontally at intervals in the same direction. The top of the column axial displacement bracket (1) is rotatably provided with a column roller (11). The wheel surface of the column roller (11) is used to roll and engage with the circumferential surface of the column (3) along the axial direction of the column (3). The top of the nut rotation bracket (2) is provided with two nut rollers (21). The wheel surface of the two nut rollers (21) is used to roll and engage with the outer circumferential surface of the nut (4).

2. The tool for assembling large columns and nuts according to claim 1, characterized in that, The column axial displacement bracket (1) includes a first support (12) and a second support (13). The first support (12) is rotatably connected to the column trolley (11), and the first support (12) slides along the radial direction of the column (3) with the second support (13).

3. The tool for assembling large columns and nuts according to claim 2, characterized in that, The column axial displacement bracket (1) also includes a fixed third support (14), the second support (13) is located on top of the third support (14) and slides with the third support (14) through a first wedge-shaped surface.

4. The tool for assembling large columns and nuts according to claim 3, characterized in that, The column axial displacement bracket (1) further includes a first fastener (15), which is used to restrict the sliding of the second support (13) and the third support (14).

5. The tool for assembling large columns and nuts according to claim 1, characterized in that, The diameter of the column tug (11) gradually increases from the middle to both ends along its axial direction.

6. The tool for assembling large columns and nuts according to claim 1, characterized in that, The nut rotating bracket (2) includes two first support seats (22) and a second support seat (23). The first support seats (22) are rotatably connected to the nut roller (21) in a one-to-one correspondence. Both first support seats (22) slide in cooperation with the second support seat (23) along the radial direction of the column (3).

7. The tool for assembling large columns and nuts according to claim 6, characterized in that, The nut rotating bracket (2) also includes a third support (24), the second support (23) is located on top of the third support (24) and slides with the third support (24) through a second wedge-shaped surface.

8. The tool for assembling large columns and nuts according to claim 7, characterized in that, The nut rotating bracket (2) also includes a second fastener (25) for restricting the sliding of the third support (24) and the second support (23).

9. The tool for assembling large columns and nuts according to claim 2, characterized in that, The column axial displacement bracket (1) further includes a first locking member (16), which is used to restrict the sliding of the first support (12) and the second support (13).

10. The tool for assembling large columns and nuts according to claim 9, characterized in that, The nut rotating bracket (2) also includes a second locking member (26) for restricting the sliding of the first support (22) and the second support (23).

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