A turnover welding tool for a dump truck carriage

Abstract

The present application belongs to the technical field of welding tooling for self-unloading vehicles, in particular to a turnover welding tooling for a self-unloading vehicle carriage, comprising: a base, two groups of racks, two groups of lifting seats, a turnover platform, a turnover power source, a lifting mechanism, a first support, a second support and a turnover locking member; compared with the prior art, the turnover welding tooling can realize 180° complete turnover of large structural members such as the floor of the self-unloading vehicle carriage, and meet the requirement of double-sided welding; in addition, the reliable retention of the lifting seat at the high position is realized through the linkage locking mechanism, and the falling of the lifting seat is prevented when the lifting mechanism fails; and the working mode of low-position stable welding and high-position safe turnover can be realized, and the welding precision and operation safety are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of welding fixtures for dump trucks, and particularly relates to a tilting welding fixture for dump truck bodies, specifically used for tilting welding fixtures for large structural components such as the floor plate of a dump truck body. Background Technology

[0002] The floor assembly of a dump truck body is the basic load-bearing structure of the truck body, consisting of a floor panel and reinforcing components such as longitudinal beams and transverse beams welded to its bottom surface. During the welding process of the floor assembly, it is usually necessary to weld the bottom surface (welding the longitudinal beams and transverse beams) and the top surface (joint welds) of the floor panel separately, thus requiring double-sided welding of the floor workpiece. Due to the large size of the floor (up to several meters in length) and its heavy weight (hundreds to thousands of kilograms per piece), traditional tipping methods require overhead cranes or multiple people working together, which is not only inefficient but also poses safety hazards.

[0003] Currently, there are some tipping welding fixture solutions in the dump truck manufacturing industry: For example, patent CN202726400U discloses a side-tilting welding fixture for a dump truck's undercarriage. It employs a hinged structure connecting a fixed frame and a tilting frame, using a hydraulic cylinder to drive the tilting frame to rotate around a tilting base, enabling welding of the workpiece at any angle within the range of 0–80°. Its shortcomings include: a maximum tilting angle of 80°, preventing 180° tilting; welding on the other side of the workpiece still requires manual flipping or secondary hoisting; and significant changes in the workpiece's center of gravity during tilting, requiring improvement in stability.

[0004] For example, patent CN116690090B discloses a welding fixture for tilting and turning the cab of a diesel engineering dump truck, which achieves multiple tilting of the cab through the cooperation of a tilting mechanism and a clamping mechanism. In this solution, the tilting and clamping need to be operated in steps, the structure is complex, and it is mainly used for small and medium-sized workpieces such as cabs, and is not suitable for large base plate workpieces.

[0005] For example, patent CN215967189U discloses a dump truck body tilting and welding device that achieves a 180° tilt through a "two-stage relay" of the first and second tilting groups. This solution adopts a dual-station structure, resulting in a large equipment size and requiring the coordinated operation of two tilting groups, making the control logic complex.

[0006] In summary, the existing welding fixtures for dump truck bodies have the following main shortcomings: (1) Limited flipping angle: Most tooling can only achieve 0 to 80° flipping, and cannot complete 180° full flipping. Welding on the other side of the workpiece still requires manual flipping or secondary hoisting. (2) Lack of low-position stable support design: Most tooling tilting platforms are used for welding in a high position or in a suspended state, which results in insufficient rigid support and affects welding accuracy; (3) Insufficient safety of large workpieces during the flipping process: Large workpieces lack reliable anti-fall protection devices during the flipping process, and there is a safety risk of workpieces falling due to the failure of the lifting mechanism.

[0007] Therefore, it is necessary to improve the existing welding fixtures for dump truck bodies. Summary of the Invention

[0008] The purpose of this invention is to address the aforementioned technical problems by providing a tilting welding fixture for dump truck bodies. This fixture can achieve a 180° complete tilting of large structural components such as the dump truck body floor, meeting the requirements for double-sided welding. Furthermore, a linkage locking mechanism ensures that the lifting seat is reliably maintained in a high position and prevents the lifting seat from falling when the lifting mechanism fails. It also enables a working mode of stable welding at a low position and safe tilting at a high position, improving welding accuracy and operational safety.

[0009] In view of this, the present invention provides a welding fixture for tilting and welding a dump truck body, comprising: The base is fixedly installed on the ground. Two sets of racks are set on both sides of the base, and each set of racks is equipped with vertical guide rails; Two sets of lifting seats, each set of lifting seats is slidably connected to two sets of vertical guide rails, and the movement trajectory of the lifting seats includes the welding position and the flipping position; The tilting platform has two ends that are rotatably connected to two sets of lifting seats via tilting shafts. The tilting platform can carry workpieces and is equipped with a clamping mechanism that can clamp the workpieces. The flip power source is used to drive the flip shaft to rotate relative to the lifting seat. The lifting mechanism is used to drive two sets of lifting seats to rise and fall relative to the base. The first support member is located at the top of the frame; The second support member is installed on the lifting seat. The second support member can cooperate with the first support member at the top of the frame to form a fall-proof support for the lifting seat. A flip-locking component is installed on the lifting seat. The flip-locking component can lock or unlock the flip shaft at the current angle. When the lifting seat is in the welding position, the bottom surface of the tilting platform contacts the base to achieve stable welding, and the tilting shaft is unlocked at this time. During the lifting process of the lifting seat, the tilting shaft is locked. When the lifting seat rises to the tilting position, the second support component cooperates with the first support component to form a fall-prevention support, and the tilting shaft is unlocked.

[0010] In the above technical solution, the overall flipping platform has a U-shaped structure, and the inner surface of the flipping platform forms a positioning groove for workpiece positioning. The bottom surface of the positioning groove is provided with multiple notches that are opposite to the connection weld positions of the workpiece base plate panel.

[0011] In the above technical solution, the clamping mechanism further includes a fixed column, a clamping arm, a clamping screw hole, and a clamping screw. The fixed column is set on the flipping platform, one end of the clamping arm is rotatably connected to the fixed column, the clamping screw hole is set on the other end of the clamping arm, and the clamping screw is threadedly connected to the clamping screw hole. When the clamping screw rotates, it can approach or move away from the workpiece, thereby cooperating with the flipping platform to clamp or release the workpiece.

[0012] In the above technical solution, furthermore, the base is provided with a clearance groove. In the initial state, the clamping mechanism is located above the flipping platform. After the flipping platform is flipped 180°, the clamping mechanism can enter the clearance groove, thereby making the flipping platform stably placed on the base.

[0013] In the above technical solution, the first support member further includes a fixed bracket, a swing arm, and a first reset elastic member. The fixed bracket is set on the top side wall of the frame. The middle part of the swing arm is rotatably connected to the fixed bracket. The swing arm has a first end and a second end that swing around the middle part. A locking block is provided on the side wall of the second end of the swing arm. The two ends of the first reset elastic member are respectively connected to one end of the swing arm and the fixed bracket. The second support component includes a push block and a stop block. The push block is set on the upper surface of the lifting seat. The side wall of the push block is provided with a slot for the block to be inserted. The width of the slot in the vertical direction is greater than the width of the block in the vertical direction. The stop block is set on one side of the slot. The stop block can move in the vertical direction on the lifting seat. The movement trajectory of the stop block includes an avoidance position and an obstruction position. During the lifting process, the push block can push the first end of the swing arm upward, causing the second end of the swing arm to swing towards the slot, thereby allowing the locking block to engage in the slot. During the swing of both ends of the swing arm, the stop block is in the avoidance position, at which time the stop block will not contact the second end of the swing arm. After the locking block engages in the slot, the stop block moves to the blocking position, at which time the stop block is located on the side of the second end of the swing arm away from the push block, and the stop block can prevent the locking block from exiting the slot. During the process of the second end of the swing arm approaching the slot, the first reset elastic element is squeezed. After the locking block engages in the slot, there is a gap between the two in the vertical direction. This gap allows the lifting platform to generate a free stroke during the descent, thereby allowing the locking block to exit the slot.

[0014] In the above technical solution, the upper surface of the lifting seat is provided with an installation groove, the tilting shaft passes through the installation groove, and the tilting locking component includes a connecting gear and a locking seat. The connecting gear is located in the installation groove and is coaxially mounted on the tilting shaft. The locking seat is slidably mounted in the installation groove in the vertical direction and is located above the connecting gear. The bottom surface of the locking seat is provided with a locking tooth assembly that can mesh with the connecting gear. A locking drive component that can drive the locking seat to move closer to or away from the connecting gear is provided in the installation groove.

[0015] In the above technical solution, further, the lower end of the stop block is located in the mounting groove, the stop block is connected to the locking seat, and the locking drive component includes an electromagnet, a metal plate, and a second reset elastic element. The metal plate is disposed at the bottom of the stop block, the electromagnet is disposed on the bottom surface of the mounting groove and below the metal plate, and the second reset elastic element is disposed between the bottom surface of the locking seat and the bottom surface of the mounting groove. When the electromagnet is energized, it can attract the metal plate, thereby driving the stop block and the locking seat to move downwards simultaneously, causing the stop block to move from the blocking position to the avoidance position, and bringing the locking seat closer to the connecting gear. During this process, the second reset elastic element is squeezed. After the electromagnet is de-energized, the stop block and the locking seat can be reset under the elastic force of the second reset elastic element, thereby causing the stop block to move from the avoidance position to the blocking position, and moving the locking seat away from the connecting gear.

[0016] In the above technical solution, the lifting seat is further provided with a detachable protective cover, which can cover the opening of the mounting groove, and the protective cover is provided with an extension groove for the upper end of the stop block to extend out.

[0017] In the above technical solution, each set of frames has two frames, and the four frames are respectively set at the four corners of the base. Each frame is equipped with a vertical guide rail. The two sides of each set of lifting seats are slidably connected to the vertical guide rails on the two frames. Each frame is equipped with a first support member, and the two sides of each set of lifting seats are equipped with a second support member. Each set of lifting seats is equipped with a flip locking member.

[0018] In the above technical solution, the power source for the rollover is further adopted as either manual drive or electronic control drive.

[0019] The beneficial effects of this invention are: 1. The tilting platform is raised to a high position using a lifting seat, and after completing a 180° rotation in an interference-free space, it is lowered back to a low position, placing the workpiece in a posture conducive to welding. During welding, the tilting platform is stably placed on the base, which provides rigid support. Compared with cantilever tilting tables, this results in higher welding precision and less deformation.

[0020] 2. Through the pure mechanical linkage between the first support member and the second support member, the mechanism does not interfere with the lifting movement of the lifting seat when the lifting mechanism is working normally; when the lifting seat rises to a high position, the mechanism forms a fall protection support to prevent the lifting seat from falling abnormally due to the failure of the lifting mechanism; the vertical gap design between the card block and the card slot enables the mechanism to automatically distinguish between normal descent and abnormal fall, without the need for sensor or controller intervention, and has high reliability.

[0021] 3. The flipping locking component (the meshing state of the connecting gear and the locking gear group) and the stop (blocking position and avoidance position) are controlled simultaneously by an electromagnet. The state switching between "flipping platform locked / flipping platform unlocked" and "lifting seat unlocked / lifting seat locked" can be achieved simply by controlling the on and off of the electromagnet. The control logic is simple and the operation is convenient. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the top three-dimensional structure of the workpiece in this invention, showing the connecting weld between the crossbeam and the longitudinal beam.

[0024] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of the workpiece in this invention, showing the connecting weld formed by multiple steel plates.

[0025] Figure 3 This is a three-dimensional structural diagram of the flip welding fixture of the present invention, in which the lifting seat is located at the welding position.

[0026] Figure 4 This is a three-dimensional structural diagram of the flip welding fixture of the present invention, in which the lifting seat is located in the flip position.

[0027] Figure 5 This is a top view of the flip welding fixture of the present invention.

[0028] Figure 6 This is a three-dimensional structural diagram of the workpiece placed on the flip welding fixture of the present invention, with the lifting seat located at the welding position.

[0029] Figure 7 This is a three-dimensional structural diagram of the workpiece placed on the flip welding fixture of the present invention, with the lifting seat located in the flip position.

[0030] Figure 8This is a schematic diagram of the bottom structure of the flipping platform when a workpiece is placed on the flipping welding fixture of the present invention and the lifting seat is in the flipping position.

[0031] Figure 9 for Figure 5 A schematic diagram of the cross-section in the AA direction is shown. Only a part of the cross-section is shown in the figure. The figure shows the second support member and the first support member working together to form a fall protection support, while the flip shaft is unlocked.

[0032] Figure 10 for Figure 9 Based on the deformation, the figure shows the state in which the second support member cooperates with the first support member to release the fall protection support, while the flip axis is locked.

[0033] Figure 11 This is a schematic diagram of a vertical cross-section at a certain point on the flipping platform when a workpiece is placed on the flipping welding fixture of the present invention and the lifting seat is in the flipping position.

[0034] Figure 12 This is a schematic diagram of the flipping process of the flipping platform when the lifting seat is in the flipping position in this invention. The diagram shows the flipping platform at the initial angle, at a certain angle during the flipping process, and after flipping 180°.

[0035] The markings in the diagram are as follows: M, Base plate; Z, Longitudinal beam; H, Crossbeam; 1, Base; 101, Clearance groove; 2, Frame; 3, Vertical guide rail; 4, Lifting seat; 401, Mounting groove; 5, Tilting platform; 501, Positioning groove; 502, Notch; 6, Clamping mechanism; 601, Fixed column; 602, Clamping arm; 603, Clamping screw; 7, Tilting shaft; 8, Lifting mechanism; 9, First support member; 901, Fixed bracket; 902, Swing arm; 903, First reset elastic member; 904, Locking block; 10, Second support member; 1001, Pushing block; 1002, Stop block; 1003, Slot; 1101, Connecting gear; 1102, Locking seat; 1103, Locking gear assembly; 1201, Electromagnet; 1202, Metal sheet; 1203, Second reset elastic member; 13, Protective cover; 131, Extension groove. Detailed Implementation

[0036] 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.

[0037] In the description of this invention, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0038] Workpiece Description: Please see Figure 1 and Figure 2 The workpiece of the present invention is the bottom plate assembly of a dump truck body, including a bottom plate panel M and reinforcing members such as longitudinal beams Z and transverse beams H welded to its bottom surface. The bottom plate panel M is spliced ​​together from multiple steel plates. Before the workpiece is transferred to the flipping welding fixture of the present invention for welding, the multiple steel plates, multiple transverse beams H and longitudinal beams Z have been preliminarily fixed by spot welding according to the design position. Connecting welds are formed between adjacent steel plates, and connecting welds are also formed between transverse beams H and longitudinal beams Z, waiting for complete welding.

[0039] Overall structure: The present invention provides a tilting welding fixture for a dump truck body, including a base 1, a frame 2, a lifting seat 4, a tilting platform 5, a tilting power source, a lifting mechanism 8, a first support member 9, a second support member 10, and a tilting locking member.

[0040] Please see Figure 3 and Figure 4 The base 1 is fixedly installed on the ground, serving as the load-bearing foundation for the entire tooling. The base 1 is welded from structural steel and has sufficient rigidity and strength to support large base plate workpieces. The base 1 is provided with a clearance groove 101, the position of which corresponds to the position of the clamping mechanism 6 after the flipping platform 5 is flipped 180°.

[0041] Please see Figures 3-5 The machine frame 2 consists of two sets, located on both sides of the base 1. Each set of machine frame 2 contains two frames, and the four frames are positioned at the four corners of the base 1, forming a four-corner support structure. Each frame is equipped with a vertical guide rail 3, which extends along the height of the frame. The frames are made of H-beams or I-beams, providing sufficient structural rigidity.

[0042] Please see Figure 3and Figure 4 The lifting seat 4 is provided in two sets. Each set of lifting seats 4 has its two sides slidably connected to the vertical guide rails 3 on two separate frames. Therefore, the lifting seat 4 can slide up and down along the vertical guide rails 3. The movement trajectory of the lifting seat 4 includes a welding position and a flipping position. The welding position is when the lifting seat 4 is at the lowest point of the vertical guide rail 3, and the flipping position is when the lifting seat 4 is at the preset position at the highest point of the vertical guide rail 3. Please refer to [link / reference]. Figure 9 and Figure 10 The upper surface of the lifting seat 4 is provided with an installation groove 401 for accommodating components such as the flipping locking parts; the lifting seat 4 is also provided with a detachable protective cover 13, which can cover the opening of the installation groove 401 to prevent welding spatter and debris from entering the installation groove 401. The protective cover 13 is provided with an extension groove 131 that allows the upper end of the stop block 1002 to extend out.

[0043] The two ends of the tilting platform 5 are rotatably connected to two sets of lifting seats 4 respectively through the tilting shaft 7. Specifically, both ends of the tilting platform 5 are provided with tilting shaft 7. The tilting shaft 7 is rotatably connected to the lifting seat 4 through bearings. One end of one tilting shaft 7 extends into the mounting groove 401 of one set of lifting seats 4, and one end of the other tilting shaft 7 passes through the mounting groove 401 of the other set of lifting seats 4 and extends to the outside of the lifting seat 4 for connecting the tilting power source. Please see Figure 3 and Figure 4 The flipping platform 5 has a U-shaped structure, with a hollow area in the middle and a solid frame around it. The inner surface of the flipping platform 5 (i.e. the inner edge of the U-shaped structure) forms a positioning groove 501 for workpiece positioning. The bottom surface of the positioning groove 501 is provided with multiple notches 502 that are opposite to the connection weld position of the workpiece base plate panel M. The hollow area of ​​the U-shaped structure provides space for welding operations, making it easy for the welding torch to approach the weld position from below the platform. The tilting platform 5 is used to carry the workpiece, and a clamping mechanism 6 is provided on the tilting platform 5 to clamp the workpiece. Please refer to [link / reference]. Figure 4 and Figure 11The clamping mechanism 6 includes a fixed post 601, a clamping arm 602, a clamping screw hole, and a clamping screw 603. The fixed post 601 is fixedly installed on the upper surface of the flipping platform 5 near the edge. One end of the clamping arm 602 is rotatably connected to the fixed post 601, allowing the clamping arm 602 to swing around the fixed post 601 in the horizontal plane. The clamping screw hole is located at the end of the clamping arm 602 away from the fixed post 601. The clamping screw 603 is threadedly connected to the clamping screw hole. The upper end of the clamping screw 603 is provided with a knob or wrench socket for operation, and the lower end of the clamping screw 603 is provided with a pressure head to increase the contact area with the workpiece. When the workpiece is placed on the flipping platform 5, the clamping arm 602 is swung above the workpiece, and the clamping screw 603 is rotated to move it downward. The pressure head presses against the surface of the workpiece, thereby fixing the workpiece on the flipping platform 5. The workpiece can be released by rotating the clamping screw 603 in the opposite direction.

[0044] In the initial state (i.e., before the flipping platform 5 has flipped), the clamping mechanism 6 is located above the flipping platform 5; when the flipping platform 5 flips 180°, the clamping mechanism 6 flips down with the flipping platform 5. At this time, the clamping mechanism 6 can just enter the clearance groove 101 on the base 1, so that the flipping platform 5 can be stably placed on the base 1 and will not be unable to be placed due to interference between the clamping mechanism 6 and the base 1.

[0045] The tilting power source is used to drive the tilting shaft 7 to rotate relative to the lifting seat 4. The tilting power source can be manually driven, for example, by setting a handwheel at one end of the tilting shaft 7, and the operator can drive the tilting platform 5 to tilt by turning the handwheel. The tilting power source can also be electrically driven, for example, by setting a motor at one end of the tilting shaft 7, and driving the tilting shaft 7 to rotate through the motor. The electric drive method can be used with a reducer to obtain sufficient torque and precise angle control. The tilting power source is installed on the lifting seat 4 and can be raised and lowered together with the lifting seat 4.

[0046] The lifting mechanism 8 is used to drive the two sets of lifting seats 4 to rise and fall relative to the base 1. The lifting mechanism 8 can be a screw drive mechanism or a hydraulic cylinder drive mechanism. When a screw drive mechanism is used, a screw is vertically installed on each frame. The screw is driven to rotate synchronously by a motor through a synchronous belt or chain. A nut that cooperates with the screw is fixed on the lifting seat 4. The motor drives the screw to rotate, and the nut drives the lifting seat 4 to rise and fall along the guide rail. When a hydraulic cylinder drive mechanism is used, a hydraulic cylinder is vertically installed on the base 1. The piston rod of the hydraulic cylinder is directly connected to the lifting seat 4, and the lifting is controlled by the hydraulic system. The hydraulic cylinder has a pressure holding and self-locking function, which can maintain the position of the lifting seat 4 when the power is off.

[0047] First support member 9 and second support member 10: Please see Figure 3 and Figure 4The first support member 9 is set on the top of the frame 2 and is used to cooperate with the second support member 10 to form a fall protection support for the lifting seat 4 on the top of the frame 2. Each frame in each group of frames 2 is provided with a first support member 9, so a total of four first support members 9 are provided. The second support member 10 is installed on the lifting seat 4. Each lifting seat 4 has a second support member 10 on both sides, so there are a total of four second support members 10, which correspond one-to-one with the four first support members 9.

[0048] Please see Figure 6 , Figure 7 , Figure 9 as well as Figure 10 The first support member 9 includes a fixed bracket 901, a swing arm 902, and a first reset elastic member 903. The fixed bracket 901 is fixedly mounted on the top side wall of the frame 2. The fixed bracket 901 is plate-shaped or frame-shaped and provides a mounting base for the swing arm 902. The middle part of the swing arm 902 is rotatably connected to the fixed bracket 901 through a pin, so the swing arm 902 can swing around the pin in the middle part. The swing arm 902 has a first end and a second end that swing around the middle part. That is, when the swing arm 902 rotates around the middle part, the first end and the second end swing in opposite directions. A locking block 904 is provided on the side wall of the second end of the swing arm 902. The locking block 904 protrudes towards the lifting seat 4. One end of the first reset elastic member 903 is connected to one end of the swing arm 902, and the other end is connected to the fixed bracket 901. In this embodiment, the first reset elastic member 903 is a tension spring. When the swing arm 902 is pushed to swing, the tension spring is stretched and stores force. When the external force disappears, the tension spring retracts and resets the swing arm 902. In another embodiment, the first reset elastic element 903 can also be a torsion spring, which is installed on the rotation shaft of the swing arm 902, and can also achieve the reset function.

[0049] The second support member 10 includes a push block 1001 and a stop block 1002. The push block 1001 is fixedly mounted on the upper surface of the lifting seat 4. The push block 1001 protrudes upward from the upper surface of the lifting seat 4. A slot 1003 is provided on the side of the push block 1001 near the swing arm 902. The opening of the slot 1003 faces the second end of the swing arm 902. The width and depth of the slot 1003 in the horizontal direction match the slot 904, so that the slot 904 can be inserted into the slot 1003. The width and depth of the slot 1003 in the vertical direction are... The height of the slot 1003 is greater than the vertical width of the locking block 904, meaning the height of the slot 1003 is greater than the height of the locking block 904. This results in gaps between the upper surface of the locking block 904 and the upper surface of the slot 1003, and between the lower surface of the locking block 904 and the lower surface of the slot 1003, after the locking block 904 is engaged in the slot 1003. The size of these gaps should be calculated and determined based on the length of the swing arm 902 and the geometry of the locking block 904, to ensure that the locking block 904 can swing within the gaps and exit the slot 1003 during normal descent.

[0050] The lower end of the stop block 1002 extends into the mounting groove 401 of the lifting seat 4. The stop block 1002 is connected to the locking seat 1102 of the flip locking member. Therefore, the lifting and lowering movement of the stop block 1002 is synchronized with the lifting and lowering movement of the locking seat 1102.

[0051] The fitting relationship between the first support member 9 and the second support member 10 is as follows: During the lifting process of the lifting seat 4, the push block 1001 moves upward with the lifting seat 4. When the top of the push block 1001 contacts and pushes the first end of the swing arm 902 upward, the swing arm 902 rotates around its middle part, and the second end of the swing arm 902 swings towards the slot 1003. During the swing of the swing arm 902, the stop block 1002 is in a clearance position and will not interfere with the movement of the second end of the swing arm 902. When the lifting seat 4 is raised to the position, the stop block 904 on the second end of the swing arm 902 is engaged in the slot 1003 on the side wall of the push block 1001. After the stop block 904 is engaged in the slot 1003, the stop block 1002 moves to the blocking position. At this time, the stop block 1002 is located on the side of the second end of the swing arm 902 away from the push block 1001, which restricts the swing of the second end of the swing arm 902 away from the push block 1001, thereby preventing the stop block 904 from exiting the slot 1003 and keeping the lifting seat 4 in a high position.

[0052] Flip-locking component: Please see Figure 9 and Figure 10 The flipping locking component is installed on the lifting seat 4 to lock or unlock the flipping shaft 7 at the current angle; each lifting seat 4 is equipped with a flipping locking component, so there are two flipping locking components in total, which lock the flipping shaft 7 at both ends of the flipping platform 5 respectively.

[0053] The flipping locking component includes a connecting gear 1101 and a locking seat 1102. The connecting gear 1101 is located in the mounting groove 401 of the lifting seat 4 and is coaxially fixed on the flipping shaft 7. The connecting gear 1101 rotates together with the flipping shaft 7. The locking seat 1102 is slidably disposed in the mounting groove 401 in the vertical direction. The locking seat 1102 is located above the connecting gear 1101. The bottom surface of the locking seat 1102 is provided with a locking tooth assembly 1103, which can mesh with the connecting gear 1101. A locking drive component that can drive the locking seat 1102 to move closer to or away from the connecting gear 1101 is provided in the mounting groove 401. The locking drive includes an electromagnet 1201, a metal plate 1202, and a second reset elastic member 1203. The metal plate 1202 is disposed at the bottom of the stop block 1002. Since the stop block 1002 is connected to the locking seat 1102, the metal plate 1202, the stop block 1002, and the locking seat 1102 are fixedly connected together and can move synchronously. The electromagnet 1201 is fixedly disposed on the bottom surface of the mounting groove 401 and located below the metal plate 1202. The second reset elastic member 1203 is disposed between the locking seat 1102 and the bottom surface of the mounting groove 401. In this embodiment, the second reset elastic member 1203 is a compression spring, one end of which abuts against the lower surface of the locking seat 1102 and the other end of which abuts against the bottom surface of the mounting groove 401.

[0054] When the electromagnet 1201 is energized, it generates magnetism and attracts the metal plate 1202, thereby driving the block 1002, the metal plate 1202 and the locking seat 1102 to move downward as a whole. This causes the block 1002 to move from the blocking position to the avoidance position, and at the same time, the locking seat 1102 moves closer to the connecting gear 1101. The locking gear assembly 1103 meshes with the connecting gear 1101. During this process, the second reset elastic element 1203 is compressed and stores force. When the locking gear assembly 1103 meshes with the connecting gear 1101, the connecting gear 1101 is locked and cannot rotate, the flipping shaft 7 is locked, and the flipping platform 5 is locked at the current angle. When the electromagnet 1201 is de-energized, its magnetism disappears, and the metal sheet 1202 is no longer attracted. Under the elastic force of the second reset elastic element 1203, the stop block 1002, the metal sheet 1202, and the locking seat 1102 move upward as a whole to reset, causing the stop block 1002 to move from the avoidance position to the blocking position. At the same time, the locking seat 1102 moves away from the connecting gear 1101, and the locking gear assembly 1103 separates from the connecting gear 1101. After the locking gear assembly 1103 separates from the connecting gear 1101, the connecting gear 1101 can rotate freely, the flip shaft 7 is unlocked, and the flip platform 5 can be flipped.

[0055] The working process of the dump truck body tilting welding fixture of the present invention is as follows: (1) Initial clamping: The lifting seat 4 is located in the welding position, and the flipping platform 5 is placed horizontally on the base 1. The workpiece that has been positioned by spot welding is hoisted onto the flipping platform 5. The workpiece is positioned by the positioning groove 501. Then, the clamping screw 603 of the clamping mechanism 6 is operated to clamp and fix the workpiece on the flipping platform 5. (2) Welding the first side: At this time, the bottom surface of the flipping platform 5 is in contact with the base 1, and the base 1 provides rigid support. Welding of the first side of the workpiece is carried out in this state, such as welding the weld between the longitudinal beam Z and the base plate panel M, the weld between the cross beam H and the base plate panel M, and the weld at the intersection of the longitudinal beam Z and the cross beam H; (3) Flipping preparation: After the first side is welded, the electromagnet 1201 is energized, attracting the metal sheet 1202. The stop block 1002 and the locking seat 1102 move downwards synchronously. The locking seat 1102 moves downwards so that its locking gear 1103 meshes with the connecting gear 1101, the flipping shaft 7 is locked, and the flipping platform 5 is locked at the current angle to prevent the flipping platform 5 from rotating accidentally during the lifting process. At the same time, the stop block 1002 moves downwards to the avoidance position. (4) Lifting and avoiding: Start the lifting mechanism 8, drive the lifting seat 4 to rise along the vertical guide rail 3, and lift the flipping platform 5 and the workpiece as a whole. During the lifting process, the flipping platform 5 remains locked and will not rotate relative to the lifting seat 4. (5) High-position locking: When the lifting seat 4 rises to the flip position, the top of the push block 1001 contacts and pushes the first end of the swing arm 902 upward, causing the swing arm 902 to swing. The locking block 904 at the second end of the swing arm 902 is locked into the slot 1003 of the push block 1001. At this time, the electromagnet 1201 is de-energized. The stop block 1002 and the locking seat 1102 move upward synchronously to reset under the elastic force of the second reset elastic element 1203. The locking seat 1102 moves upward to separate its locking gear 1103 from the connecting gear 1101. The flip shaft 7 is unlocked, and the flip platform 5 can rotate freely. At the same time, the stop block 1002 moves upward to the blocking position, located on the side of the second end of the swing arm 902 away from the push block 1001, restricting the locking block 904 from exiting the slot 1003, so that the lifting seat 4 is kept in the high position. Thus, the lifting seat 4 is mechanically locked in the flip position, and the flip platform 5 is unlocked and can be flipped. (6) Flipping: The flipping power source drives the flipping shaft 7 to rotate, and the flipping platform 5 drives the workpiece to rotate 180° to complete the flipping of the workpiece; (7) Flipping and locking: After the flipping is completed, the electromagnet 1201 is energized again, the stop block 1002 and the locking seat 1102 move downward synchronously, the locking seat 1102 moves downward so that its locking gear 1103 meshes with the connecting gear 1101 again, the flipping shaft 7 is locked, the flipping platform 5 is locked at 180° angle, and at the same time the stop block 1002 moves downward to the avoidance position, releasing the obstruction to the second end of the swing arm 902; (8) Lowering and resetting: Start the lifting mechanism 8 to run in reverse and drive the lifting seat 4 to move downward. In the initial stage of descent, the push block 1001 is still pushing against the first end of the swing arm 902, and the locking block 904 is still locked in the slot 1003. As the lifting seat 4 continues to descend, the push block 1001 and the first end of the swing arm 902 will generate relative displacement. Since the width of the slot 1003 in the vertical direction is greater than that of the locking block 904, the locking block 904 can generate relative vertical movement in the slot 1003, so that the locking block 904 can exit from the slot 1003 to release the anti-fall support. When the locking block 904 completely exits the slot 1003, the swing arm 902 is reset under the elastic force of the first reset elastic element 903. The lifting seat 4 continues to descend to the lowest welding position, and the bottom surface of the flipping platform 5 contacts the base 1, which provides rigid support. (9) Welding the second side: After the flipping platform 5 is stably placed on the base 1, the second side of the workpiece is welded, for example, the weld seam of the top surface of the base plate panel M is welded. (10) Unloading: After welding is completed, loosen the clamping screw 603 of the clamping mechanism 6, release the workpiece, and lift the welded base plate assembly away from the flipping platform 5.

[0056] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A tipping welding fixture for a dump truck body, characterized in that, include: A base (1) is fixedly installed on the ground; Two sets of racks (2) are respectively set on both sides of the base (1), and vertical guide rails (3) are provided on both sets of racks (2); Two sets of lifting seats (4), the two sets of lifting seats (4) are slidably connected to the two sets of vertical guide rails (3) respectively, and the movement trajectory of the lifting seats (4) includes the welding position and the flipping position; A flipping platform (5) is provided. The two ends of the flipping platform (5) are rotatably connected to two sets of lifting seats (4) respectively through a flipping shaft (7). The flipping platform (5) can carry workpieces and is provided with a clamping mechanism (6) that can clamp the workpieces. A flip power source is used to drive the flip shaft (7) to rotate relative to the lifting seat (4); Lifting mechanism (8), the lifting mechanism (8) is used to drive the two sets of lifting seats (4) to lift relative to the base (1); A first support member (9) is disposed on the top of the frame (2); The second support member (10) is disposed on the lifting seat (4). The second support member (10) can cooperate with the first support member (9) to form a fall-proof support for the lifting seat (4) on the top of the frame (2). A flip-locking component is provided on the lifting seat (4), and the flip-locking component can lock or unlock the flip shaft (7) at the current angle; When the lifting seat (4) is in the welding position, the bottom surface of the flipping platform (5) contacts the base (1) to achieve stable welding, and the flipping shaft (7) is unlocked at this time; during the lifting process of the lifting seat (4), the flipping shaft (7) is locked; when the lifting seat (4) rises to the flipping position, the second support member (10) cooperates with the first support member (9) to form a fall-prevention support, and the flipping shaft (7) is unlocked.

2. The tipping welding fixture for the dump truck body according to claim 1, characterized in that: The flipping platform (5) has an overall U-shaped structure. The inner surface of the flipping platform (5) forms a positioning groove (501) for workpiece positioning. The bottom surface of the positioning groove (501) is provided with multiple notches (502) that are opposite to the connection weld positions of the workpiece base plate panel (M).

3. The tipping welding fixture for the dump truck body according to claim 2, characterized in that: The clamping mechanism (6) includes a fixed post (601), a clamping arm (602), a clamping screw hole, and a clamping screw (603). The fixed post (601) is disposed on the flipping platform (5). One end of the clamping arm (602) is rotatably connected to the fixed post (601). The clamping screw hole is disposed at the other end of the clamping arm (602). The clamping screw (603) is threadedly connected to the clamping screw hole. When the clamping screw (603) rotates, it can approach or move away from the workpiece, thereby cooperating with the flipping platform (5) to clamp or release the workpiece.

4. The tipping welding fixture for the dump truck body according to claim 3, characterized in that: The base (1) is provided with a clearance groove (101). In the initial state, the clamping mechanism (6) is located above the flipping platform (5). After the flipping platform (5) is flipped 180°, the clamping mechanism (6) can enter the clearance groove (101), so that the flipping platform (5) is stably placed on the base (1).

5. The tipping welding fixture for the dump truck body according to claim 1, characterized in that: The first support member (9) includes a fixed bracket (901), a swing arm (902), and a first reset elastic member (903). The fixed bracket (901) is disposed on the top side wall of the frame (2). The middle part of the swing arm (902) is rotatably connected to the fixed bracket (901). The swing arm (902) has a first end and a second end that swing around the middle part. A locking block (904) is disposed on the side wall of the second end of the swing arm (902). The two ends of the first reset elastic member (903) are respectively connected to one end of the swing arm (902) and the fixed bracket (901). The second support member (10) includes a push block (1001) and a stop block (1002). The push block (1001) is disposed on the upper surface of the lifting seat (4). The side wall of the push block (1001) is provided with a slot (1003) into which the stop block (904) can be inserted. The width of the slot (1003) in the vertical direction is greater than the width of the stop block (904) in the vertical direction. The stop block (1002) is disposed on one side of the slot (1003). The stop block (1002) can move vertically on the lifting seat (4). The movement trajectory of the stop block (1002) includes an avoidance position and a blocking position. During the lifting process of the lifting seat (4), the push block (1001) can push the first end of the swing arm (902) upward, causing the second end of the swing arm (902) to swing towards the slot (1003), thereby causing the locking block (904) to engage in the slot (1003). During the swinging process of the two ends of the swing arm (902), the stop block (1002) is in the avoidance position. After the locking block (904) engages in the slot (1003), the stop block (1002) moves to the blocking position. At this time, the stop block (1002) is located in the... The second end of the swing arm (902) is away from the push block (1001), and the stop block (1002) can restrict the locking block (904) from exiting the slot (1003); during the process of the second end of the swing arm (902) approaching the slot (1003), the first reset elastic element (903) is squeezed; after the locking block (904) is inserted into the slot (1003), there is a gap between the two in the vertical direction, which allows the lifting seat (4) to generate a free stroke during the descent, so that the locking block (904) can exit the slot (1003).

6. The tipping welding fixture for the dump truck body according to claim 5, characterized in that: The upper surface of the lifting seat (4) is provided with a mounting groove (401), the flipping shaft (7) passes through the mounting groove (401), the flipping locking component includes a connecting gear (1101) and a locking seat (1102), the connecting gear (1101) is located in the mounting groove (401) and coaxially disposed on the flipping shaft (7), the locking seat (1102) is slidably disposed in the mounting groove (401) in the vertical direction, the locking seat (1102) is located above the connecting gear (1101), the bottom surface of the locking seat (1102) is provided with a locking tooth assembly (1103), the locking tooth assembly (1103) can mesh with the connecting gear (1101); the mounting groove (401) is provided with a locking drive component that can drive the locking seat (1102) to approach or move away from the connecting gear (1101).

7. The tipping welding fixture for the dump truck body according to claim 6, characterized in that: The lower end of the stop block (1002) is located in the mounting groove (401). The stop block (1002) is connected to the locking seat (1102). The locking drive component includes an electromagnet (1201), a metal plate (1202), and a second reset elastic member (1203). The metal plate (1202) is disposed at the bottom of the stop block (1002). The electromagnet (1201) is disposed on the bottom surface of the mounting groove (401) and located below the metal plate (1202). The second reset elastic member (1203) is disposed between the locking seat (1102) and the bottom surface of the mounting groove (401). When the electromagnet (1201) is energized, it can attract the... The metal plate (1202) causes the stop block (1002) and the locking seat (1102) to move downwards simultaneously, so that the stop block (1002) moves from the blocking position to the avoidance position and the locking seat (1102) moves closer to the connecting gear (1101). During this process, the second reset elastic element (1203) is squeezed. After the electromagnet (1201) is de-energized, the stop block (1002) and the locking seat (1102) can be reset under the elastic force of the second reset elastic element (1203), so that the stop block (1002) moves from the avoidance position to the blocking position and the locking seat (1102) moves away from the connecting gear (1101).

8. The tipping welding fixture for the dump truck body according to claim 6 or 7, characterized in that: The lifting seat (4) is provided with a detachable protective cover (13), which can cover the opening of the mounting groove (401). The protective cover (13) is provided with an extension groove (131) that allows the upper end of the stop block (1002) to extend out.

9. The tipping welding fixture for the dump truck body according to claim 1, characterized in that: Each set of the frame (2) has two frames, and the four frames are respectively set at the four corners of the base (1). Each frame is provided with a vertical guide rail (3). The two sides of each set of the lifting seat (4) are slidably connected to the vertical guide rails (3) on the two frames. Each frame is provided with a first support member (9). The two sides of each set of the lifting seat (4) are provided with a second support member (10). Each set of the lifting seat (4) is provided with a flipping lock member.

10. The tipping welding fixture for the dump truck body according to claim 1, characterized in that: The power source for the rotation can be manually driven or electrically controlled.

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