A support for a roller assembly

Abstract

The application discloses a kind of for supporting bolt assembly's roller frame, it is related to roller frame technical field, including base and two groups of roller support mechanism, two groups of roller support mechanism are respectively arranged at the front end and rear end above base, for supporting the support bolt of horizontal placement, roller support mechanism includes support frame, two roller assemblies, roller distance adjusting assembly and inclination adjusting mechanism, support frame is rotatably connected with base, two roller assemblies are oppositely arranged on support frame and form V-shaped support space, roller distance adjusting assembly is used to adjust the distance between two roller assemblies, inclination adjusting mechanism is used to adjust the inclination angle of support frame relative to base, roller assembly includes mutually fixedly connected roller body and roller shaft, roller shaft is rotatably connected with support frame, the present application can automatically drive roller, improve adaptability.

Description

Technical Field

[0001] This invention relates to the field of roller frame technology, and in particular to a roller frame for supporting bolt assembly. Background Technology

[0002] In industries such as nuclear power, petrochemicals, and heavy machinery, it is often necessary to assemble large-diameter, long support bolts. Taking the reactor coolant pump in a nuclear power plant as an example, its support bolts are large in diameter, long in length, and heavy (a single piece can weigh hundreds of kilograms). Precise thread fitting with the upper support bolt holes must be completed in confined spaces and harsh environments. Existing support bolt assembly technologies mainly employ the following methods: First, the vertical assembly method, which uses vertical hoisting to lift the support bolt vertically and screw it into the upper support bolt hole. This method suffers from problems such as a high center of gravity, poor hoisting stability, and difficulty in centering when the large bolt is vertical. It also requires a large working height, making it difficult to implement in confined spaces such as nuclear island buildings. Furthermore, operators must work at height, posing safety risks. Second, the horizontal rigid support assembly method, which in some cases uses simple V-blocks or fixed brackets to horizontally support the bolts, and then adjusts the bolt position using a crane or hand-operated hoist. The drawback of this method is that the fixed support cannot adjust the horizontal inclination angle of the bolt, making it difficult to position the bolt... The axis of the bolt and the upper support screw hole are precisely aligned. The friction between the bolt and the bracket is large, and manual rotation during assembly is laborious and can easily damage the thread surface. In addition, there is no horizontal rotation adjustment function, and it is difficult to adjust the parallelism between the bolt and the screw hole. Thirdly, there is existing roller frame technology. Related technologies have disclosed a roller device for assembling support bolts, including a roller frame for supporting support bolts, a hand-operated hoist for adjusting the horizontal tilt angle of the roller frame, and an inclinometer for measuring the horizontal tilt angle of the roller frame. The roller frame includes rollers that support support bolts and lifting lugs set on the outside of the rollers. The roller frame makes the horizontally placed support bolts and the upper support have the same horizontal tilt angle, and their axes are parallel and opposite. Assembly can be completed by manually rotating the support bolts.

[0003] However, the existing roller frame technology still has the following shortcomings: (1) The contact method between the roller and the bolt is singular and has poor adaptability. The existing roller frame uses rollers of fixed diameter to directly support the bolt, which cannot adapt to bolts of different diameters. Different roller frames of different specifications need to be replaced for bolts of different diameters, resulting in insufficient versatility. (2) Lack of active drive function for the roller. The existing technology relies on manually rotating the bolt to complete the assembly. For support bolts with large diameters and long thread fits, manual rotation is labor-intensive, inefficient, and difficult to control the rotation speed and torque, which can easily cause thread damage. Summary of the Invention

[0004] In order to at least solve one of the above-mentioned technical problems, the present invention aims to provide a roller frame for supporting bolt assembly, which can automatically drive the rollers and improve adaptability.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A roller frame for supporting bolt assembly includes a base and two sets of roller support mechanisms. The two sets of roller support mechanisms are respectively located at the front and rear ends above the base, and are used to jointly support horizontally placed support bolts.

[0007] The roller support mechanism includes a support frame, two roller assemblies, a roller spacing adjustment assembly, and a tilt angle adjustment mechanism; the support frame is rotatably connected to the base, the two roller assemblies are arranged opposite each other on the support frame to form a V-shaped support space, the roller spacing adjustment assembly is used to adjust the spacing between the two roller assemblies, and the tilt angle adjustment mechanism is used to adjust the tilt angle of the support frame relative to the base;

[0008] The roller assembly includes a roller body and a roller shaft that are fixedly connected to each other, and the roller shaft is rotatably connected to the support frame; at least one roller assembly of the roller support mechanism is provided with a driving device, the driving device including a drive motor and a transmission mechanism, the transmission mechanism being tractively connected to the roller shaft to drive the roller body to rotate.

[0009] Preferably, the roller spacing adjustment assembly includes a bidirectional lead screw, a first slider, and a second slider. The bidirectional lead screw is rotatably mounted on the support frame via bearings. The support frame is provided with a guide structure extending along the axial direction of the bidirectional lead screw. The first slider and the second slider are respectively threaded onto the reverse threads at both ends of the bidirectional lead screw and are both slidably engaged with the guide structure. The two roller assemblies are respectively fixedly connected to the first slider and the second slider.

[0010] Preferably, the tilt adjustment mechanism includes a lifting component and a tilt detection component.

[0011] Preferably, the bottom of the lifting component is fixedly connected to the base, the top of the lifting component is rotatably connected to the support frame, and the positions where the support frame is rotatably connected to the base and the positions where the lifting component is rotatably connected to the support frame are spaced apart, so that the lifting component causes the support frame to swing relative to the base when it extends or retracts.

[0012] Preferably, the lifting assembly is an electric cylinder.

[0013] Preferably, the tilt detection component is a tilt meter, which is installed on the roller support mechanism or support frame.

[0014] The present invention has the following beneficial effects:

[0015] I. Significantly Enhanced Adaptability to Bolts of Different Diameters: This technical solution, through the inclusion of a roller spacing adjustment component, allows for adjustment of the V-shaped support space formed by two roller assemblies as needed. When dealing with support bolts of different diameters, there is no need to replace the entire roller frame or roller assembly; simply adjusting the spacing ensures good contact and stable support between the roller body and the bolt surface. This not only significantly expands the applicability of a single device and reduces the cost of preparing multiple sets of tooling for different projects on-site, but also avoids the time and manpower waste caused by frequent tooling changes. It is particularly suitable for scenarios with complex on-site conditions and diverse bolt specifications, such as nuclear power plants.

[0016] Second, the system achieves automated bolt rotation, significantly reducing labor intensity and improving assembly quality. The solution integrates a drive unit consisting of a drive motor and transmission mechanism into the roller assembly, enabling it to actively drive the roller body to rotate, relying on friction to rotate the supporting bolt. This completely changes the existing work mode that relies on manual rotation of large-diameter, heavy bolts, greatly reducing the labor intensity of operators and improving assembly efficiency. More importantly, the electric drive allows for precise control of rotation speed and torque, ensuring a smooth and uniform bolt insertion process. This effectively avoids the risk of damage to precision threads caused by uneven force and impact during manual operation, guaranteeing the assembly quality and long-term reliability of key components.

[0017] Third, the system achieves precise adjustment of the bolt's horizontal tilt angle, ensuring accurate alignment and smooth assembly. The solution utilizes a tilt angle adjustment mechanism to drive the support frame to swing relative to the base, thereby precisely adjusting the horizontal tilt angle of the supported bolt. Combined with real-time feedback from the tilt angle detection component, operators can adjust the bolt axis to an ideal state where it is completely parallel and coincident with the axis of the upper support's bolt hole. This fundamentally solves the problem of axis alignment caused by the inability to adjust the tilt angle of fixed supports, eliminates assembly obstacles such as thread seizing and uneven wear caused by alignment deviations, makes the screwing in of heavy bolts smoother, and avoids structural internal stress that may be generated by forced assembly.

[0018] IV. Stable and reliable structure, ensuring safety and precise adjustment under heavy loads; two sets of roller support mechanisms, arranged rear-to-rear, jointly support the horizontally placed support bolts, forming a stable two-point support structure. This effectively distributes the weight load of the hundreds of kilograms of bolts, ensuring overall stability during assembly. The integration of spacing adjustment, tilt angle adjustment, and rotation drive functions allows the massive bolts to complete all posture adjustments and alignments while under stable support, avoiding the safety risks associated with repeated lifting and adjustments in traditional hoisting methods. This makes it particularly suitable for use in environments with limited space and extremely high safety requirements, such as nuclear island plant buildings.

[0019] V. Strong spatial adaptability, perfectly suited to the needs of operations in confined spaces; the entire technical solution adopts a horizontal assembly approach, integrating all adjustment and drive mechanisms into a compact structure on the base. Compared to vertical assembly methods that require a great deal of vertical space, this solution significantly reduces the required clearance height for operations, enabling the precise assembly of bolts with large length-to-diameter ratios to be successfully completed in typical industrial scenarios such as nuclear island plant buildings and equipment compartments with limited height, solving the pain point that traditional methods are difficult to implement in such scenarios.

[0020] VI. Synergistic Effect of Components to Form a Complete Precision Assembly Solution: This solution is not simply a collection of functions; the roller spacing adjustment, tilt angle adjustment, and automatic drive work together seamlessly. Spacing adjustment ensures optimal envelope support and sufficient driving friction for bolts of different diameters; tilt angle adjustment precisely establishes the prerequisite for axial alignment; and automatic drive, based on the stability and alignment established by the former two, smoothly executes the screwing action. The three elements work together to form a complete, efficient, and reliable overall solution for the horizontal assembly of large-diameter bolts, from adaptive and stable support to automatic precision screwing. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view of an embodiment of the present invention.

[0023] Figure 2 This is a side view of an embodiment of the present invention.

[0024] In the diagram: 1. Base; 201. Support frame; 221. Roller body; 222. Roller shaft; 231. Drive motor; 232. Transmission mechanism; 241. Two-way lead screw; 242. First slider; 243. Second slider; 244. Guide structure; 251. Lifting assembly; 252. Tilt angle detection assembly. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1 to 2 As shown, a roller frame for supporting bolt assembly includes a base 1 and two sets of roller support mechanisms. The two sets of roller support mechanisms are respectively located at the front and rear ends above the base 1, and are used to jointly support horizontally placed support bolts.

[0027] The roller support mechanism includes a support frame 201, two roller assemblies, a roller spacing adjustment assembly, and a tilt angle adjustment mechanism. The support frame 201 is rotatably connected to the base 1. The two roller assemblies are arranged opposite each other on the support frame 201 to form a V-shaped support space. The roller spacing adjustment assembly is used to adjust the spacing between the two roller assemblies. The tilt angle adjustment mechanism is used to adjust the tilt angle of the support frame 201 relative to the base 1.

[0028] The roller assembly includes a roller body 221 and a roller shaft 222 that are fixedly connected to each other. The roller shaft 222 is rotatably connected to the support frame 201. At least one roller assembly of the roller support mechanism is provided with a driving device, which includes a drive motor 231 and a transmission mechanism 232. The transmission mechanism 232 is hygienically connected to the roller shaft 222 and is used to drive the roller body 221 to rotate.

[0029] like Figures 1 to 2 As shown, two sets of roller support mechanisms are arranged at the front and rear ends of the base 1, forming a two-point support structure. The working principle is that a horizontally placed large-diameter support bolt is straddled and rested on these two sets of mechanisms. The weight of the bolt is shared by the two support points, ensuring the stability of the heavy bolt's posture during assembly and avoiding the risk of overturning that may occur with single-point support. This provides a stable foundation platform for subsequent adjustment and alignment operations.

[0030] In each roller support mechanism, two roller assemblies are arranged opposite each other to form a V-shaped support space. The principle behind this is that when the support bolt is placed horizontally within this V-shaped space, the cylindrical outer surface of the bolt simultaneously contacts the circumferential surfaces of the two roller bodies 221. This V-shaped structure utilizes the bolt's own weight to automatically center it and fit it against the two rollers, achieving natural alignment and stable clamping for bolts of different diameters. Simultaneously, it converts the bolt's weight into a normal force acting on the rollers, providing the necessary preload for the rollers' frictional drive.

[0031] The support frame 201 is rotatably connected to the base 1 and is equipped with a tilt adjustment mechanism. Its working principle is that the tilt adjustment mechanism acts as a drive source, pushing or pulling the support frame 201 to swing at a small angle around its rotatable connection point with the base 1. This allows for precise adjustment of the overall horizontal tilt angle of the support bolts within the V-shaped support space, ensuring accurate parallel alignment between their axis and the axis of the upper support bolt hole at the far end. This clears obstacles for subsequent axial screw-in assembly and fundamentally solves the problem of thread seizing or damage caused by the included angle between the two ends of the axis.

[0032] The roller spacing adjustment assembly is used to change the relative distance between two roller assemblies. Its working principle involves an adjustment mechanism driving the two roller assemblies to move synchronously closer or further apart, thereby changing the opening angle and bottom height of the V-shaped support opening. The advantage of this is that when mounting support bolts of different diameters, no parts need to be replaced; simply adjusting this spacing ensures that the roller body 221 always maintains optimal contact with the bolt surface. This guarantees that large-diameter bolts can fall into the support space while preventing small-diameter bolts from being suspended due to an excessively low support point, greatly enhancing the versatility and adaptability of the equipment.

[0033] A drive unit consisting of a drive motor 231 and a transmission mechanism 232 is integrated into one of the roller components of at least one set of roller support mechanisms, and is connected to the roller shaft 222 for transmission. Its working principle is that the torque output by the drive motor 231 is transmitted to the roller shaft 222 through the transmission mechanism 232, causing the roller body 221 to rotate actively. The rotating roller body 221 then drives the heavy bolt to rotate smoothly around its own axis through static friction with the surface of the support bolt. This automatic drive method replaces manual rotation, not only significantly improving assembly efficiency and greatly reducing labor intensity, but more importantly, achieving stable and controllable rotation speed and torque, effectively protecting the precision threads of the bolt and bolt hole from accidental damage, and ensuring assembly quality.

[0034] like Figures 1 to 2As shown, the roller spacing adjustment assembly includes a bidirectional lead screw 241, a first slider 242, and a second slider 243. The bidirectional lead screw 241 is rotatably mounted on a support frame 201 via bearings. The support frame 201 is provided with a guide structure 244 extending axially along the bidirectional lead screw 241. The first slider 242 and the second slider 243 are threaded onto the opposite threads at both ends of the bidirectional lead screw 241, and both are in sliding engagement with the guide structure 244. The two roller assemblies are fixedly connected to the first slider 242 and the second slider 243, respectively. The roller spacing adjustment assembly adopts a structure of bidirectional lead screw 241 cooperating with the first slider 242 and the second slider 243. Its working principle is that the two ends of the bidirectional lead screw 241 have threads with opposite directions of rotation. When the bidirectional lead screw 241 is rotated, the first slider 242 and the second slider 243, which are respectively engaged on the opposite threads at both ends, will produce opposite directions of movement. Because the guide structure 244 on the support frame 201 restricts the two sliders to move only axially and not rotate with the lead screw, rotating the lead screw can drive the first slider 242 and the second slider 243 to move synchronously towards each other or away from each other. Since the two roller assemblies are fixed to these two sliders respectively, the opening size of the V-shaped support can be continuously and symmetrically adjusted, ensuring that regardless of the diameter of the bolt being supported, its axis can automatically remain on the central symmetry plane of the V-shaped space, achieving high-precision adaptive centering support.

[0035] like Figures 1 to 2 As shown, the tilt adjustment mechanism includes a lifting assembly 251 and a tilt detection assembly 252. The bottom of the lifting assembly 251 is fixedly connected to the base 1, and the top of the lifting assembly 251 is rotatably connected to the support frame 201. The positions where the support frame 201 is rotatably connected to the base 1 and the positions where the lifting assembly 251 is rotatably connected to the support frame 201 are spaced apart, so that the lifting assembly 251 causes the support frame 201 to swing relative to the base 1 when it extends or retracts. The lifting assembly 251 is an electric cylinder. The tilt detection assembly 252 is a tilt meter, which is mounted on the roller support mechanism or the support frame 201.

[0036] The tilt adjustment mechanism consists of two parts: a lifting assembly 251 and a tilt detection assembly 252. Its working principle is as follows: the lifting assembly 251 acts as the actuator, providing linear extension and retraction power, while the tilt detection assembly 252 acts as the feedback element, measuring the current angle state in real time. By observing the readings of the tilt detection assembly 252, the operator can control the extension and retraction of the lifting assembly 251 until the tilt angle of the support frame 201 reaches the target value. The effect of this combination is to transform the previous vague angle adjustment relying on visual inspection and experience into precise closed-loop adjustment with real-time data feedback, significantly improving the accuracy and efficiency of aligning the bolt axis with the upper support bolt hole axis, and eliminating assembly failures caused by tilt angle deviations.

[0037] The bottom of the lifting assembly 251 is fixed to the base 1, and the top is rotatably connected to the support frame 201. These two connection points are spaced apart from the rotatable connection points of the support frame 201 and the base 1, forming a lever or swing arm mechanism. Its working principle is that when the lifting assembly 251 extends or retracts, since the base 1 is fixed, the hinge point at the top of the lifting assembly 251 pushes or pulls the support frame 201, causing it to rotate and swing around its fixed rotatable connection point with the base 1. Specifically, the lifting assembly 251 is designed as an electric cylinder, utilizing its high precision, self-locking capability, and fast response to execute this action. The overall effect is that the linear displacement of the electric cylinder can be precisely converted into a small angular change in the support frame 201, achieving stepless and stable adjustment of the horizontal tilt angle of the support bolts. After adjustment, the self-locking capability of the electric cylinder maintains this posture for a long time, providing a reliable static positioning basis for subsequent rotational assembly.

[0038] The tilt detection component 252 specifically uses an inclinometer, which is installed on the roller support mechanism or support frame 201. Its principle is that the inclinometer can directly sense the absolute tilt angle of its mounting plane relative to the horizontal plane. Because it is fixed to the support frame 201 or roller support mechanism, which will sway, it can reflect the current axial tilt angle of the support bolt in real time and accurately. The convenience of this setup is that the operator can intuitively read the angle value at the workstation without the need for external measuring tools, guiding the precise operation of the lifting component 251, making the tilt adjustment process simple, fast, and accurate.

[0039] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. A roller frame for supporting bolt assembly, characterized in that, It includes a base (1) and two sets of roller support mechanisms, which are respectively located at the front and rear ends above the base (1) to jointly support the horizontally placed support bolts. The roller support mechanism includes a support frame (201), two roller assemblies, a roller spacing adjustment assembly, and a tilt adjustment mechanism; the support frame (201) is rotatably connected to the base (1), the two roller assemblies are arranged opposite each other on the support frame (201) to form a V-shaped support space, the roller spacing adjustment assembly is used to adjust the spacing between the two roller assemblies, and the tilt adjustment mechanism is used to adjust the tilt angle of the support frame (201) relative to the base (1); The roller assembly includes a roller body (221) and a roller shaft (222) fixedly connected to each other. The roller shaft (222) is rotatably connected to the support frame (201). At least one roller assembly of the roller support mechanism is provided with a driving device, which includes a drive motor (231) and a transmission mechanism (232). The transmission mechanism (232) is tractively connected to the roller shaft (222) to drive the roller body (221) to rotate.

2. A roller frame for supporting bolt assembly according to claim 1, characterized in that, The roller spacing adjustment assembly includes a bidirectional lead screw (241), a first slider (242), and a second slider (243). The bidirectional lead screw (241) is rotatably mounted on the support frame (201) via bearings. The support frame (201) is provided with a guide structure (244) extending axially along the bidirectional lead screw (241). The first slider (242) and the second slider (243) are respectively threaded onto the reverse threads at both ends of the bidirectional lead screw (241) and are both slidably engaged with the guide structure (244). The two roller assemblies are fixedly connected to the first slider (242) and the second slider (243) respectively.

3. A roller frame for supporting bolt assembly according to claim 2, characterized in that, The tilt adjustment mechanism includes a lifting assembly (251) and a tilt detection assembly (252).

4. A roller frame for supporting bolt assembly according to claim 3, characterized in that, The bottom of the lifting component (251) is fixedly connected to the base (1), and the top of the lifting component (251) is rotatably connected to the support frame (201). The positions where the support frame (201) is rotatably connected to the base (1) and the positions where the lifting component (251) is rotatably connected to the support frame (201) are spaced apart, so that when the lifting component (251) extends or retracts, it drives the support frame (201) to swing relative to the base (1).

5. A roller frame for supporting bolt assembly according to claim 4, characterized in that, The lifting assembly (251) is an electric cylinder.

6. A roller frame for supporting bolt assembly according to claim 4, characterized in that, The tilt detection component (252) is a tilt meter, which is installed on the roller support mechanism or support frame (201).

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