Clamping device for welding bridge expansion device

Abstract

The utility model provides a clamping device for welding of a bridge expansion device, which comprises a support beam body, a plurality of support beam units, a plurality of clamping devices, a plurality of clamping devices and a plurality of clamping devices, and is characterized in that the support beam body comprises a plurality of support beam units; the straightening mechanisms are arranged on the supporting surface of the supporting beam body in a sliding mode, and the straightening mechanisms are arranged in the extending direction of the supporting beam body at intervals and used for clamping and straightening the edge beam of the bridge expansion device; the swinging mechanism is used for driving the supporting beam body to swing and comprises a driving rotating device and a follow-up rotating device, and the driving rotating device is arranged at one end of the supporting beam body; the follow-up rotating device is arranged at the other end of the supporting beam body and arranged at the splicing position of the adjacent supporting beam units. According to the utility model, the edge beam of the bridge expansion device can be automatically turned over, straightened and straightened, so that the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bridge expansion joint welding technology, and in particular to a clamping device for welding bridge expansion joints. Background Technology

[0002] Currently, the production of bridge expansion joints is mostly semi-automated or manual, and there are still many shortcomings in terms of production efficiency, accuracy, and adaptability, as detailed below:

[0003] 1. In most cases, the weld points between the bridge expansion joint and the supporting beam are not on the same surface. After the weld points on the upper surface are welded, the operator needs to manually flip the beam to complete the weld points on the lower surface, which results in low production efficiency.

[0004] 2. Bridge expansion joints are welded together on the support beams in pairs. Each pair of bridge expansion joints may have bends and cannot fit together flat, which will cause the welding process to stop and require manual heating and straightening. Traditional production lines have limited adaptability and further reduce production efficiency.

[0005] Therefore, there is an urgent need for a clamping device for welding bridge expansion joints that can automatically flip the beams and straighten the side beams of the bridge expansion joints. Utility Model Content

[0006] The purpose of this invention is to provide a clamping device for welding bridge expansion joints, aiming to solve the technical problem of low welding efficiency in traditional bridge expansion joints.

[0007] To achieve the above objectives, this utility model provides a clamping device for welding bridge expansion joints, comprising:

[0008] The support beam body includes a plurality of support beam units, which are sequentially connected to form the support beam body.

[0009] Several straightening mechanisms are slidably disposed on the support surface of the support beam body, and the several straightening mechanisms are arranged at intervals along the extension direction of the support beam body for clamping and straightening the side beams of the bridge expansion joint.

[0010] A swing mechanism is used to drive the support beam body to swing, which includes an active rotation device and a follower rotation device, wherein the active rotation device is disposed at one end of the support beam body;

[0011] The follow-up rotation device is located at the other end of the support beam body and at the splice of adjacent support beam units.

[0012] As a further improvement to the above solution, the active rotation device includes a base and a rotary drive device disposed on the base, and the rotating end of the rotary drive device is connected to one end of the support beam body; the rotation axis of the rotary drive device is arranged parallel to the extension line of the length direction of the support beam body.

[0013] Preferably, the rotary drive device is a worm gear rotary drive device, a planetary gear reduction rotary drive, or a hydraulic motor direct drive rotary mechanism.

[0014] As a further improvement to the above solution, the follower rotation device includes a driving roller and a driven roller disposed on the outer wall of the support beam body and pressed against the driving roller, wherein the driven rollers are arranged in pairs.

[0015] The two driven rollers are matched and arranged on both sides of the driving roller.

[0016] As a further improvement to the above scheme, the adjacent support beam units are detachably connected by half-flanges, and a half-wheel disc is provided between the adjacent half-flanges, the half-wheel disc constituting the driving roller; and the half-flange of the end support beam unit constitutes the driving roller.

[0017] As a further improvement to the above solution, two first linear guide rails are provided parallel to each other on the support surface of the support beam body. Correspondingly, a first slider is provided on the bottom surface of the straightening mechanism. The first slider is matched and set on the first linear guide rail, so that the straightening mechanism can be slidably set on the support beam body. Preferably, the first slider has a locking device.

[0018] As a further improvement to the above solution, the straightening mechanism includes a clamping seat, a drive motor disposed at one end of the clamping seat, a trapezoidal screw and a lead screw nut, and a pair of clamping components.

[0019] The trapezoidal screw passes through the clamping seat, with one end connected to the drive motor and the other end rotatably connected to the clamping seat. The trapezoidal screw has two trapezoidal threads with opposite directions of rotation. The screw nut is slidably sleeved on the corresponding trapezoidal thread segment.

[0020] The clamping components are connected to the corresponding lead screws and nuts via connecting plates to straighten or open the clamping components.

[0021] As a further improvement to the above solution, the clamping assembly includes a clamping seat disposed on the connecting plate and a clamping block disposed on the side of the clamping seat;

[0022] The clamping base includes a base plate, a side plate vertically disposed on one side of the bottom, and a reinforcing plate disposed between the base plate and the side plate. The clamping block is disposed on the side of the side plate opposite to the reinforcing plate.

[0023] As a further improvement to the above solution, the straightening mechanism also includes a second linear guide rail disposed on both sides of the trapezoidal screw and arranged parallel to it at intervals; correspondingly, the bottom surface of the connecting plate is provided with a second slider, and the second slider is fitted onto the second linear guide rail.

[0024] Because this utility model adopts the above technical solutions, the beneficial effects of this application are as follows:

[0025] This utility model provides a clamping device for welding bridge expansion joints. Through the detachable splicing design of the support beam units and the sliding arrangement of the straightening mechanism, an axially extendable modular structure is formed, effectively adapting to the clamping requirements of side beams of different specifications. The standardized splicing interface design of the support beam units breaks through the size limitations of traditional fixed clamps. By increasing or decreasing the number of support beam units, the clamping length can be continuously adjusted, allowing a single set of equipment to cover more than 80% of the specifications of conventional bridge expansion joints, significantly improving equipment utilization. The multi-point interval clamping of the straightening mechanism along the extension direction of the support beam significantly enhances the uniformity of straightening the side beam. Specifically, in use, spot welding can be performed first, followed by straightening of the spot-welded side beam by the straightening mechanism, and then full welding can be performed. There is no need to remove the spot-welded side beam for hot straightening and then perform secondary clamping. Therefore, the straightening mechanism, while achieving straightening, can improve production efficiency.

[0026] In addition, the swing mechanism adopts an active-follower composite drive mode. By cooperating the main driving torque of the active rotation device with the auxiliary support of the follower rotation device, the support beam body can be precisely adjusted in three-dimensional space, so that the welding working surface is always at the optimal process angle, effectively reducing the amount of welding deformation. It can also realize automatic flipping, eliminating the need for manual flipping and secondary clamping, thereby improving production efficiency and greatly improving the overall assembly accuracy of the telescopic device.

[0027] This invention achieves integrated operation of side beam positioning, straightening, and angle adjustment through the synergistic effect of the sliding straightening mechanism and the rotating support mechanism. The clamping time of a single product is reduced by about 40%, and it can directly enter the full welding process without secondary correction, significantly improving the cycle efficiency of the production line. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional schematic diagram of a clamping device for welding bridge expansion joints disclosed in this utility model.

[0030] Figure 2 for Figure 1 A magnified schematic diagram of the I-axis;

[0031] Figure 3 This is a top view schematic diagram of a clamping device for welding bridge expansion joints disclosed in this utility model;

[0032] Figure 4 for Figure 3 AA sectional view;

[0033] Figure 5 This is a three-dimensional schematic diagram of the straightening mechanism disclosed in this utility model.

[0034] Figure label:

[0035] 1. Support beam body; 11. Support beam unit; 12. Half flange; 13. Half wheel; 14. First linear guide rail; 15. First slider;

[0036] 2. Straightening mechanism; 21. Clamping seat; 22. Drive motor; 23. Trapezoidal screw; 24. Lead screw nut; 25. Clamping assembly; 26. Connecting plate;

[0037] 3. Swinging mechanism; 31. Active rotating device; 311. Base; 312. Rotation drive device; 32. Follower rotating device; 321. Driving roller; 322. Driven roller;

[0038] 4. Bridge expansion joints; 41. Side beams; 42. Ear-shaped anchors.

[0039] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. 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.

[0041] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0043] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0044] See Figures 1-5 This utility model provides a clamping device for welding bridge expansion joints, including a supporting beam body 1, a straightening mechanism 2, and a swinging mechanism 3. The following describes the technical solution in detail with reference to embodiments.

[0045] like Figure 1 As shown, the support beam body 1 is assembled from several support beam units 11 by a detachable connection. Each support beam unit 11 has a half-flange 12 welded to both ends, and the mating surface of the half-flange 12 has evenly distributed bolt holes. The half-flanges 12 of adjacent support beam units 11 are fastened together by high-strength bolts to form an annular flange structure. When two half-flanges 12 are mated, a pre-reserved annular assembly gap is provided at their edges, and a half-wheel disc 13 is embedded within the gap; the thickness of the half-wheel disc 13 matches the width of the annular assembly gap.

[0046] Two first linear guide rails 14 are arranged parallel to each other on the support surface of the support beam body 1. Correspondingly, a first slider 15 is provided on the bottom surface of the straightening mechanism 2. The first slider 15 is matched and arranged on the first linear guide rails 14, so that the straightening mechanism 2 can be slidably arranged on the support beam body 1. Preferably, the first slider 15 has a locking device. In use, the interval position of each straightening mechanism 2 can be flexibly adjusted according to the length of the side beam 41 of the bridge expansion joint 4. In this embodiment, the interval position between each straightening mechanism 2 can be manually adjusted, and then locked on the first linear guide rails 14 by the locking device of the first slider 15.

[0047] See Figure 4 and Figure 5 Each straightening mechanism 2 includes a clamping seat 21, a drive motor 22, a trapezoidal screw 23, a lead screw nut 24, and a pair of clamping assemblies 25. The drive motor 22 is fixed to the right end of the clamping seat 21 and is drivenly connected to the right end of the trapezoidal screw 23 via a coupling. The left end of the trapezoidal screw 23 is rotatably supported on the left end of the clamping seat 21 via a bearing assembly. The trapezoidal screw 23 has two trapezoidal thread segments with opposite directions of rotation, and the pitch of the two threads is equal and symmetrically distributed. The lead screw nut 24 includes a first nut and a second nut, which are respectively sleeved on the two trapezoidal thread segments and form a self-locking fit with the thread segments. The two clamping assemblies 25 are respectively fixed to the first nut and the second nut via corresponding connecting plates 26. When the drive motor 22 rotates forward, the two lead screw nuts 24 move synchronously in opposite directions, driving the clamping assemblies 25 to clamp the workpiece; when rotating in reverse, the clamping assemblies 25 are opened.

[0048] See Figure 1 and Figure 2 The swing mechanism 3 includes an active rotation device 31 and a follower rotation device 32. The active rotation device 31 is located at the first end of the support beam body 1, driving the support beam body 1 to rotate around the axis. The follower rotation device 32 is located at the tail end of the support beam body 1 and the splicing point of adjacent support beam units 11. The follower rotation device 32 at the splicing point transmits torque through the half-wheel disk 13 to ensure that multiple support beam units 11 swing synchronously.

[0049] This utility model, through the detachable splicing design of the support beam unit 11 and the sliding arrangement of the straightening mechanism 2, forms an axially extendable modular structure, effectively adapting to the clamping requirements of side beams 41 of different specifications. The standardized splicing interface design of the support beam unit 11 breaks through the size limitations of traditional fixed clamps. By increasing or decreasing the number of support beam units 11, the clamping length can be continuously adjusted, allowing a single set of equipment to cover more than 80% of the specifications of conventional bridge expansion joints 4, significantly improving equipment utilization. The multi-point interval clamping of the straightening mechanism 2 along the extension direction of the support beam significantly enhances the uniformity of straightening the side beam 41. Specifically, in use, spot welding can be performed first, and then the straightening mechanism 2 can be used to straighten the spot-welded side beam 41 before full welding. There is no need to remove the spot-welded side beam 41 for hot straightening and then perform secondary clamping. Therefore, the setting of the straightening mechanism 2 can improve production efficiency while achieving straightening.

[0050] In addition, the swing mechanism 3 adopts an active-follower composite drive mode. Through the main driving torque of the active rotation device 31 and the auxiliary support of the follower rotation device 32, the support beam body 1 can be precisely adjusted in three-dimensional space, so that the welding working surface is always at the optimal process angle, effectively reducing the amount of welding deformation, and can realize automatic flipping without the need for manual flipping and secondary clamping, thereby improving production efficiency and greatly improving the overall assembly accuracy of the telescopic device.

[0051] This utility model achieves integrated operation of positioning, straightening, and angle adjustment of the side beam 41 through the coordinated action of the sliding straightening mechanism 2 and the rotating support mechanism. The clamping time of a single product is reduced by about 40%, and it can directly enter the full welding process without secondary correction, which significantly improves the cycle efficiency of the production line.

[0052] It should be noted that the structure of the bridge expansion joint 4 is as follows: Figure 2 As shown, the device includes two side beams 41 arranged in pairs. Several ear-shaped anchors 42 are evenly spaced on the sides of the side beams 41. This clamping device is used to clamp the pair of side beams 41. The bottoms of the two side beams 41 are connected as one piece by steel bars and other connectors, and have a preset expansion joint. In use, the side beams 41 are detachably placed on the support surface of the support beam body 1 and fixed on the support surface by connectors. Then, the ear-shaped anchors 42 are placed in sequence at the marked positions by the gripping robot. Then, the ear-shaped anchors 42 are spot welded to the side beams 41 by the spot welding robot. Then, the straightening mechanism 2 is activated to straighten and correct the spot welded bridge expansion device 4. The swing mechanism 3 is activated as needed to keep the welding surface at the optimal process angle without manual flipping.

[0053] In a preferred embodiment, the active rotation device 31 includes a base 311 and a rotary drive device 312 disposed on the base 311, and the rotating end of the rotary drive device 312 is connected to one end of the support beam body 1; the rotation axis of the rotary drive device 312 is arranged parallel to the extension line of the length direction of the support beam body 1.

[0054] Preferably, the rotary drive device 312 can be any one of a worm gear rotary drive device 312, a planetary gear reduction rotary drive device 312, or a hydraulic motor direct drive rotary mechanism, wherein:

[0055] The worm gear rotary drive device 312 achieves a high reduction ratio and self-locking function through the meshing transmission of the worm and worm wheel;

[0056] The planetary gear reduction rotary drive 312 provides high torque output through a multi-stage planetary gear set;

[0057] The hydraulic motor direct-drive rotary mechanism uses a hydraulic motor to directly drive the support beam body 1, which is suitable for heavy-duty working conditions.

[0058] In a preferred embodiment, the follower rotation device 32 includes a driving roller 321 and a driven roller 322 disposed on the outer wall of the support beam body 1 and pressed against the driving roller 321. The driven rollers 322 are arranged in pairs.

[0059] Two driven rollers 322 are matched and arranged on both sides of the driving roller; in this embodiment, the half-disc 13 constitutes the driving roller 321; and the half-flange 12 of the end support beam unit 11 constitutes the driving roller 321; the outer surface of the half-flange 12 of the support beam unit 11 located at the end of the support beam body 1 is directly processed to form the driving roller 321 separately.

[0060] In practice, the two driven rollers 322 are arranged symmetrically to press against both sides of the driving roller 321, forming a double-sided clamping friction pair structure.

[0061] The follow-up rotation device 32 can be arranged at the end or middle of the support beam body 1 at a single point or multiple points according to the length and load distribution requirements. It can not only meet the simplified installation requirements of short beam structures, but also realize the optimized distribution of span loads of long beam structures, and has strong engineering adaptability.

[0062] By combining single-point active drive and multi-point follow-up drive, the bending moment load during the swinging process of the support beam is effectively dispersed, significantly improving the torsional stiffness and motion stability of the mechanism, and is especially suitable for precise swing control of large-span support beams.

[0063] In a preferred embodiment, the bottom surface of the connecting plate 26 is provided with two second sliders along its length. The second linear guide rails are arranged parallel to both sides of the trapezoidal screw 23 and are fixed to the upper surface of the clamping seat 21 by bolts. The second sliders and the second linear guide rails form a sliding pair, so that the connecting plate 26 moves linearly along the second linear guide rails when the trapezoidal screw 23 rotates.

[0064] The trapezoidal screw 23 drives the symmetrically distributed lead screw nuts 24, achieving synchronous centering movement of the clamping assembly 25, eliminating the off-center load problem caused by unilateral drive, and improving the concentricity and positioning accuracy of workpiece clamping. The added second linear guide rail and the second slider at the bottom of the connecting plate 26 form a double guiding structure, which significantly reduces the radial force on the trapezoidal screw 23, avoids jamming of the lead screw nut 24 due to lateral force, and extends the service life of the mechanism. The inclined surface friction characteristics of the trapezoidal thread pair can automatically lock the position of the lead screw nut 24 when the power is off, preventing the clamping assembly 25 from being accidentally released due to vibration or external force, and ensuring clamping reliability.

[0065] As a preferred embodiment, see Figure 5 The clamping assembly 25 includes a clamping seat disposed on the connecting plate 26 and a clamping block disposed on the side of the clamping seat;

[0066] The clamping base includes a base plate, a side plate vertically disposed on one side of the base plate, and a reinforcing plate disposed between the base plate and the side plate. The clamping block is disposed on the side of the side plate opposite to the reinforcing plate; specifically, the clamping block is detachably mounted on the side of the side plate opposite to the reinforcing plate by bolts. The clamping surface of the clamping block is provided with anti-slip texture, and an adjustment groove is provided between the bottom of the clamping block and the side plate. By tightening the locking bolt, the clamping block can be slidably adjusted along the height direction of the side plate to adapt to the clamping requirements of workpieces of different sizes. The clamping block adopts a sliding adjustment design, combined with anti-slip texture and locking bolts, to ensure that the workpiece is clamped stably and the position can be precisely adjusted, which is suitable for high-precision welding or processing scenarios.

[0067] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A clamping device for bridge expansion joint welding, characterized in that, include: The support beam body includes a plurality of support beam units, which are sequentially connected to form the support beam body. Several straightening mechanisms are slidably disposed on the support surface of the support beam body, and the several straightening mechanisms are arranged at intervals along the extension direction of the support beam body for clamping and straightening the side beams of the bridge expansion joint. A swing mechanism is used to drive the support beam body to swing, which includes an active rotation device and a follower rotation device, wherein the active rotation device is disposed at one end of the support beam body; The follow-up rotation device is located at the other end of the support beam body and at the splice of adjacent support beam units.

2. A clamping device for welding of bridge expansion joints according to claim 1, characterized in that The active rotation device includes a base and a rotary drive device disposed on the base, wherein the rotating end of the rotary drive device is connected to one end of the support beam body; the rotation axis of the rotary drive device is arranged parallel to the extension line of the length direction of the support beam body.

3. A clamping device for welding of bridge expansion joints according to claim 1 or 2, characterized in that The follow-up rotation device includes a driving roller and a driven roller disposed on the outer wall of the support beam body and pressed against the driving roller, wherein the driven rollers are arranged in pairs. The two driven rollers are matched and arranged on both sides of the driving roller.

4. A clamping device for welding of bridge expansion joints according to claim 3, characterized in that The adjacent support beam units are detachably connected by half-flanges, and a half-wheel disc is provided between the adjacent half-flanges. The half-wheel disc constitutes the driving roller; and the half-flange of the end support beam unit constitutes the driving roller.

5. A clamping device for welding of expansion joints for bridges according to claim 1 or 2, characterized in that Two first linear guide rails are arranged parallel to each other at intervals on the support surface of the support beam body. Correspondingly, a first slider is provided on the bottom surface of the straightening mechanism. The first slider is matched and arranged on the first linear guide rail, so that the straightening mechanism can be slidably arranged on the support beam body.

6. A clamping device for welding of expansion joints for bridges according to claim 1 or 2, characterized in that The straightening mechanism includes a clamping seat, a drive motor disposed at one end of the clamping seat, a trapezoidal screw and a lead screw nut, and a pair of clamping components; The trapezoidal screw passes through the clamping seat, with one end connected to the drive motor and the other end rotatably connected to the clamping seat. The trapezoidal screw has two trapezoidal threads with opposite directions of rotation. The screw nut is slidably sleeved on the corresponding trapezoidal thread segment. The clamping components are connected to the corresponding lead screws and nuts via connecting plates to straighten or open the clamping components.

7. A clamping device for welding of bridge expansion joints according to claim 6, characterized in that The clamping assembly includes a clamping seat disposed on the connecting plate and a clamping block disposed on the side of the clamping seat; The clamping base includes a base plate, a side plate vertically disposed on one side of the base plate, and a reinforcing plate disposed between the base plate and the side plate. The clamping block is disposed on the side of the side plate opposite to the reinforcing plate.

8. A clamping device for welding of bridge expansion joints according to claim 6, characterized in that The straightening mechanism further includes second linear guides arranged on both sides of the trapezoidal screw and spaced parallel to it; correspondingly, the bottom surface of the connecting plate is provided with second sliders, and the second sliders are fitted onto the second linear guides.

9. A clamping device for welding of bridge expansion joints according to claim 2, characterized in that The rotary drive device is a worm gear rotary drive device, a planetary gear reduction rotary drive, or a hydraulic motor direct drive rotary mechanism.

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