A sweeper truck box welding positioning tool clamp

Abstract

The present application relates to the technical field of sanitation vehicle welding processing, in particular to a kind of washing and sweeping vehicle box body welding positioning tool fixture and welding device, including fixture platform and rotating structure, rotating structure includes main shaft, two V-shaped frames, support structure, two second driving structures and two locking structures;Two sliding connection components are symmetrically provided on V-shaped frame;Support structure includes two support rods, support rod is connected with fixture platform, and the both ends of support rod are respectively connected with the sliding connection component on two V-shaped frames;Second driving structure is used to drive two support rods to move respectively towards main shaft and away from main shaft direction;Two locking structures are respectively arranged on two V-shaped frames, and locking structure and second driving structure are respectively arranged at the both ends of V-shaped frame, and locking structure is used to fix support rod;The present application is provided with fixture platform and rotating mechanism, so that the positions such as inside bottom, two sides sidewall of washing and sweeping vehicle box body can be welded using flat welding mode.

Description

Technical Field

[0001] This invention relates to the field of sanitation vehicle welding technology, specifically to a welding positioning fixture for a sweeper truck body, and also to a welding device. Background Technology

[0002] In the manufacturing process of sweeper trucks, the body, as a core load-bearing component, must possess high strength and high sealing performance to meet the long-term needs of loading sewage and garbage. Therefore, the welding quality of the body directly determines the overall performance and service life of the sweeper truck. The body structure of sweeper trucks is mostly a rectangular cavity. The welding process involves connecting the bottom and side walls of the body to the pre-installed steel plates. Special tooling fixtures are required to position and fix the body to ensure welding accuracy and efficiency.

[0003] Patent CN215546310U discloses a tooling fixture for processing the body of a sweeper truck. It includes a base, a body bracket, a clamping mechanism, and a clamping adjustment mechanism. The clamping adjustment mechanism consists of a longitudinal translation adjustment mechanism, a lateral translation adjustment mechanism, and a height adjustment mechanism. The longitudinal translation adjustment mechanism achieves front-to-back position adjustment through the cooperation of a longitudinal slide rail and a longitudinal sliding plate. The lateral translation adjustment mechanism achieves left-to-right position adaptation by relying on a support column, a lateral slide rail, and a lateral sliding plate. The height adjustment mechanism uses a height adjustment cylinder to drive an L-shaped bracket, thereby driving the clamping mechanism to achieve fine-tuning of the height. At the same time, the clamping mechanism is equipped with a clamping arm flipping drive cylinder, which can drive the clamping arm bracket to flip and clamp the body. The adjustment block on the clamping arm can also adjust the positioning position according to the bending shape of the body.

[0004] While the above solution enables the assembly and welding of sweeper truck bodies of different specifications, during the welding process, the bottom of the body can be naturally kept horizontal due to the fixing method of the tooling fixture, allowing for flat welding. Flat welding provides a clear operating view and a stable molten pool, ensuring the forming quality and sealing of the bottom weld. However, for the side walls of the body, the tooling fixture cannot adjust the side walls to a near-horizontal welding position, necessitating vertical welding. During vertical welding, the molten pool is prone to flowing downwards due to gravity, leading to defects such as weld beads, incomplete penetration, and undercut. This severely affects the strength and sealing of the side wall welds, making it difficult to meet the corrosion and pressure resistance requirements of the sweeper truck body under long-term loads of sewage and garbage. This results in drastically different welding effects between the bottom and side walls of the sweeper truck body. The bottom weld is of stable and reliable quality, while the side wall welds are prone to quality issues, ultimately reducing the structural reliability and service life of the sweeper truck body and failing to meet high-standard production requirements. Summary of the Invention

[0005] To address the aforementioned issues, a welding positioning fixture for a sweeper truck body is provided. By setting up a fixture platform and a rotating mechanism, flat welding can be used for welding parts such as the bottom and side walls of the sweeper truck body.

[0006] To address the problems of existing technologies, this invention provides a welding and positioning fixture for a sweeper truck body, comprising a fixture platform for mounting various fixtures. The lower end of the fixture platform has a rotating structure, which includes a main shaft, two V-shaped supports, a support structure, two second drive structures, and two locking structures. The two V-shaped supports are respectively located at both ends of the main shaft, and two sliding connection components are symmetrically arranged on the V-shaped supports. The support structure is located between the two V-shaped supports and includes two support rods connected to the fixture platform. The two ends of the support rods are respectively connected to the sliding connection components on the two V-shaped supports. The two second drive structures are respectively located on the two V-shaped supports, and are used to drive the two support rods to move towards and away from the main shaft, respectively. The two locking structures are respectively located on the two V-shaped supports, and the locking structures and second drive structures are respectively located at both ends of the V-shaped supports. The locking structures are used to fix the support rods.

[0007] Preferably, the support structure further includes a lifting structure, which is used to drive the two support rods to move closer to or further away from the main shaft simultaneously.

[0008] Preferably, the lifting structure includes a first driving structure and multiple support guide components; the first driving structure is connected to two support rods; the multiple support guide components are equally spaced at the lower end of the clamping platform, and the support guide components are used to slide to connect the two support rods and the clamping platform.

[0009] Preferably, the first driving structure includes a first guide rod and multiple driving blocks; the first guide rod is arranged parallel between two support rods and connected to the clamping platform; the multiple driving blocks are slidably arranged on the first guide rod, and each driving block has a transmission rod at both ends, with the driving block and the support rod respectively hinged at both ends.

[0010] Preferably, the first drive structure further includes a first linear driver, which is used to control the drive block to move along the first guide rod.

[0011] Preferably, the second drive structure includes a transmission block, a third guide rod, and a linear drive assembly; the transmission block is connected to one end of the support rod via a bearing; the third guide rod is used to limit the movement direction of the transmission block; and the linear drive assembly is used to drive the transmission block to move along the third guide rod.

[0012] Preferably, the locking structure includes a fixing block, a rectangular frame, and two self-pressurizing components; the fixing block is connected to one end of the support rod via a bearing; the rectangular frame is connected to a V-shaped frame; the two self-pressurizing components are respectively disposed inside the rectangular frame and on both sides of the fixing block, and the two self-pressurizing components are used to clamp and lock the position of the fixing block.

[0013] Preferably, the self-pressurizing assembly includes a pressing plate and a plurality of fourth guide rods; the pressing plate has a plurality of slots for locking the fixing block; the plurality of fourth guide rods are equally spaced on the pressing plate, the fourth guide rods are slidably connected to the rectangular frame, and the fourth guide rods are fitted with elastic elements that provide a thrust toward the fixing block.

[0014] Preferably, the locking structure further includes an unlocking component for unlocking the two self-clamping component locking blocks.

[0015] A welding apparatus, including a welding positioning fixture for a sweeper truck body.

[0016] The advantages of this invention compared to the prior art are: 1. This invention provides a clamping platform and a rotating mechanism. The second driving structure and locking structure in the rotating mechanism fix the clamping platform in a horizontal position before welding, making it easy to fix the sweeper body on the clamping platform. The second driving structure drives the support rod to move towards the main shaft, and the main shaft drives the clamping platform to rotate. Combined with the locking structure to fix the support rod at the welding position, the bottom and side walls of the sweeper body can be in a near-horizontal state during welding. This allows the bottom and side walls of the sweeper body to be welded using a flat welding method, avoiding problems such as unstable molten pool and poor weld formation caused by complex welding postures such as vertical welding and overhead welding.

[0017] 2. This invention features a lifting structure. During bottom welding, after the locking structure is unlocked, the lifting structure drives the support rod closer to the main shaft, causing the platform to descend. This is suitable for bottom flat welding operations. Before side wall welding, the locking structure is unlocked again, and the lifting structure drives the support rod away from the main shaft, causing the platform to rise. This provides space for subsequent main shaft adjustment of the box angle. The lifting structure can flexibly adjust the height of the fixture platform according to the welding process requirements, thus solving the problem that fixed-height fixtures are difficult to adapt to different welding scenarios.

[0018] 3. The present invention provides a first driving structure and multiple supporting and guiding components. The multiple supporting and guiding components serve as a transition structure between the support rod and the fixture platform. Through the rigid connection between the first moving block and the second guide rod, the driving force of the support rod is evenly distributed to the lower end face of the fixture platform, thereby avoiding deformation caused by excessive local stress on the fixture platform, extending the service life of the fixture platform, and ensuring the overall structural stability of the platform, providing a reliable bearing foundation for welding operations. Attached Figure Description

[0019] Figure 1 This is a perspective view of a welding apparatus according to the present invention.

[0020] Figure 2 This is a perspective view of the rotating mechanism in a welding and positioning fixture for a sweeper truck body according to the present invention.

[0021] Figure 3 This is a perspective view of the fixture platform, main shaft, V-frame, and support structure in a welding and positioning tooling fixture for a sweeper truck body according to the present invention.

[0022] Figure 4 This is a perspective view of the support rod, the first drive structure, and the support guide assembly in a welding and positioning fixture for a sweeper truck body according to the present invention.

[0023] Figure 5 This is a perspective view of the support rod, first guide rod, drive block, transmission rod, first linear driver, first moving block, and second guide rod in a welding and positioning fixture for a sweeper truck body according to the present invention.

[0024] Figure 6 This is a perspective view of the main shaft, V-shaped frame, support rod, first drive structure, support and guide assembly, and second drive structure in a welding and positioning fixture for a sweeper truck body according to the present invention.

[0025] Figure 7 This is a perspective view of the V-shaped frame, support rod, second drive structure, and locking structure in a welding and positioning fixture for a sweeper truck body according to the present invention.

[0026] Figure 8 This is a perspective view of the transmission block, third guide rod, and linear drive assembly in a welding and positioning fixture for a sweeper truck body according to the present invention.

[0027] Figure 9 This is a perspective view of the fixing block, rectangular frame, self-pressurizing component, and unlocking component in a welding positioning fixture for a sweeper truck body according to the present invention.

[0028] Figure 10 This is a perspective view of the fixing block, rectangular frame, clamping plate, fourth guide rod, and elastic element in a welding positioning fixture for a sweeper truck body according to the present invention.

[0029] Figure 11 This is a perspective view of the self-pressurizing component, the second linear actuator, and the drive plate in a welding positioning fixture for a sweeper truck body according to the present invention.

[0030] The diagram is labeled as follows: 1. Fixture platform; 2. Spindle; 3. V-block; 31. Sliding connection assembly; 311. Slide rod; 312. Slider; 4. Support structure; 41. Support rod; 42. Lifting structure; 421. First drive structure; 4211. First guide rod; 4212. Drive block; 4213. Transmission rod; 4214. First linear actuator; 422. Support guide assembly; 4221. First moving block; 4222. Second guide rod; 5. Second drive structure; 51. Transmission block; 52. Third guide rod; 53. Linear drive assembly; 531. Lead screw; 532. Rotary actuator; 6. Locking structure; 61. Fixing block; 62. Rectangular frame; 63. Self-clamping assembly; 631. Clamping plate; 632. Fourth guide rod; 633. Elastic element; 64. Unlocking assembly; 641. Second linear actuator; 642. Drive plate. Detailed Implementation

[0031] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0032] Reference Figure 1 Figure 11 As shown: A welding and positioning fixture for a sweeper truck body includes a fixture platform 1 for mounting various fixtures. The lower end of the fixture platform 1 has a rotating structure, which includes a main shaft 2, two V-shaped supports 3, a support structure 4, two second drive structures 5, and two locking structures 6. The two V-shaped supports 3 are respectively located at both ends of the main shaft 2. Two sliding connection assemblies 31 are symmetrically arranged on the V-shaped supports 3. Each sliding connection assembly 31 includes a slide rod 311 and a slider 312. Multiple slide rods 311 are connected to the V-shaped supports 3, and the sliders 312 are slidably connected to the multiple slide rods 311. The support structure 4... The support structure 4 is connected to the slider 312 and is disposed between the two V-shaped frames 3. The support structure 4 includes two support rods 41, which are connected to the clamping platform 1. The two ends of the support rods 41 are respectively connected to the sliding connection components 31 on the two V-shaped frames 3. Two second drive structures 5 are respectively disposed on the two V-shaped frames 3. The second drive structures 5 are used to drive the two support rods 41 to move towards the main shaft 2 and away from the main shaft 2, respectively. Two locking structures 6 are respectively disposed on the two V-shaped frames 3, and the locking structures 6 and the second drive structures 5 are respectively disposed at the two ends of the V-shaped frames 3. The locking structures 6 are used to fix the support rods 41.

[0033] Before welding, the clamping platform 1 is in a horizontal state under the control of the second drive structure 5 and the locking structure 6. During welding, the sweeper body to be welded is placed stably on the horizontal clamping platform 1 using hoisting equipment. Various special tooling fixtures on the clamping platform 1 are activated to clamp and fix the corresponding parts of the sweeper body, ensuring a tight connection between the sweeper body and the clamping platform 1 to prevent displacement of the sweeper body during welding. Then, the steel plate or other auxiliary structures to be connected to the sweeper body are placed into the designated welding positions inside the sweeper body. Since the bottom of the sweeper body is on a horizontal plane, flat welding is used directly at this point. The pre-assembled steel plate is welded to the bottom of the sweeper truck body. After the bottom welding is completed, the welding process of the inner side wall of the sweeper truck body begins. At this time, as the main shaft 2 rotates, the two locking structures 6 release the fixation on one of the support rods 41. Simultaneously, the two second drive structures 5 apply a force towards the main shaft 2 to the other support rod 41, causing the support rod 41 to drive the corresponding slider 312 to move towards the main shaft 2 along the slide bar 311 on the V-shaped frame 3. The unlocked support rod 41 then drives the corresponding slider 312 to move away from the main shaft 2 along the slide bar 311. As the two support rods 41 move in opposite directions, the clamping platform 1 gradually tilts around the main shaft 2, bringing... The sweeper body rotates synchronously until the side wall to be welded on the sweeper body rotates to a near-horizontal state. At this point, the main shaft 2 stops rotating, and the second drive structure 5 stops operating. The two support rods 41 are repositioned by the locking structure 6 to ensure that the side wall of the sweeper body remains stable and near-horizontal. At this point, flat welding can be used to weld the connection between the pre-installed steel plate and the side wall of the sweeper body. When welding the inner wall of the other side of the sweeper body, first release the two locking structures 6 from fixing the support rods 41. The main shaft 2 rotates in the opposite direction, and at the same time, the direction of the force of the two second drive structures 5 is adjusted so that they apply a force far from the support rods 41 that were previously close to the main shaft 2. The force acting on the main shaft 2 applies a force towards the main shaft 2 to the support rod 41 that was previously away from the main shaft 2, causing the two support rods 41 to move in opposite directions. Driven by the support rods 41, the clamping platform 1 rotates the sweeper car body towards the other side of the main shaft 2 until the side wall to be welded on the other side of the sweeper car body rotates to a near-horizontal state. The support rods 41 are then fixed again by the locking structure 6 to ensure the stability of the car body position. Through the synergistic effect of the rotation structure and the locking structure 6, the bottom and side walls of the sweeper car body can be welded using a flat welding method, avoiding problems such as unstable molten pool and poor weld formation caused by complex welding postures such as vertical welding and overhead welding.

[0034] Reference Figure 2 and Figure 4 As shown: The support structure 4 also includes a lifting structure 42, which is used to drive the two support rods 41 to move closer to or further away from the main shaft 2 at the same time.

[0035] After the sweeper truck body is hoisted onto the clamping platform 1 and secured, the two locking structures 6 are first controlled to simultaneously release the fixation on the support rods 41, freeing the support rods 41 from positional constraints and enabling them to move along the slide bar 311. Then, the lifting structure 42 is activated, driving the two support rods 41 closer together. Since the support rods 41 themselves have a downward tendency, under the drive of the lifting structure 42, the two support rods 41 drive the corresponding sliders 312 to move along the slide bar 311 on the V-shaped frame 3 towards the main shaft 2. As the two support rods 41 simultaneously approach the main shaft 2, the clamping platform 1, connected to the upper end of the support rods 41, moves smoothly downward until it reaches a position suitable for welding operations. Height, locking structure 6 relocks support rod 41. When the bottom of the box is welded and the side wall of the box needs to be welded, the two locking structures 6 remove the fixation of support rod 41 again. Then, the lifting structure 42 is activated and the drive direction is switched. The two support rods 41 are driven to move slider 312 synchronously away from the main shaft 2 along the slide bar 311 on the V-shaped frame 3. The support height of the clamping platform 1 gradually increases, driving the clamping platform 1 to move smoothly upward until it is raised to a height that is convenient for the main shaft 2 to rotate and adjust the angle of the side wall of the sweeper box. The lifting structure 42 can flexibly adjust the height of the clamping platform 1 according to the welding process requirements, thus solving the problem that fixed height clamps are difficult to adapt to different welding scenarios.

[0036] Reference Figure 4 and Figure 5 As shown: The lifting structure 42 includes a first drive structure 421 and multiple support guide components 422; the first drive structure 421 is connected to two support rods 41; the multiple support guide components 422 are equally spaced at the lower end of the clamping platform 1, and the support guide components 422 are used to slide to connect the two support rods 41 and the clamping platform 1.

[0037] Specifically, the support and guide assembly 422 includes two first moving blocks 4221 and a second guide rod 4222. The two first moving blocks 4221 are respectively connected to two support rods 41. The two ends of the second guide rod 4222 are fixedly connected to the clamping platform 1, and the second guide rod 4222 is perpendicular to the two support rods 41. The two first moving blocks 4221 are slidably connected to the second guide rod 4222.

[0038] As the two support rods 41 move toward the main shaft 2, the two first moving blocks 4221, which are fixed to the upper end of the support rods 41, are simultaneously pulled by the support rods 41 and move closer to each other along the axis of the second guide rod 4222. Since the second guide rod 4222 is rigidly connected to the clamping platform 1, the sliding of the first moving blocks 4221 along the guide rod drives the second guide rod 4222 to move downward synchronously, thereby pulling the clamping platform 1 down smoothly. When the clamping platform 1 drops to the target height that meets the bottom welding operation inside the box, the control locking structure 6 relocks the position of the support rods 41. At this time, the position of the first moving blocks 4221 on the second guide rod 4222 is fixed, and the clamping platform 1 is maintained at the set height, entering the bottom welding process. As the two support rods 41 move away from the main shaft 2, the two first moving blocks 4221, which are fixed to the upper end of the support rods 41, are simultaneously pushed by the support rods 41 and move closer to each other along the axis of the second guide rod 4222. With the lines moving away from each other, the second guide rod 4222, pushed by the first moving block 4221, causes the entire clamping platform 1 to move upward. Due to the equal spacing of multiple support and guide components 422, each component transmits movement synchronously, ensuring that the clamping platform 1 remains horizontal during the ascent and avoiding tilting. When the clamping platform 1 rises to a height that allows the spindle 2 to rotate and adjust the angle of the box side wall, the locking structure 6 locks the support rod 41 again. At this time, the position of the first moving block 4221 on the second guide rod 4222 is fixed, and the clamping platform 1 is stabilized at this height, providing a suitable operating space for subsequent side wall welding. The support and guide component 422, as a transition structure between the support rod 41 and the clamping platform 1, transmits the driving force of the support rod 41 evenly to the lower end face of the clamping platform 1 through the rigid connection of the first moving block 4221 and the second guide rod 4222, thereby avoiding deformation caused by excessive local stress on the clamping platform 1.

[0039] Reference Figure 4 and Figure 5 As shown: The first drive structure 421 includes a first guide rod 4211 and a plurality of drive blocks 4212; the first guide rod 4211 is arranged in parallel between two support rods 41 and is connected to the clamping platform 1; the plurality of drive blocks 4212 are all slidably arranged on the first guide rod 4211, and each end of the drive block 4212 is provided with a transmission rod 4213, and the two ends of the transmission rod 4213 are respectively hinged to the drive block 4212 and the support rod 41.

[0040] When the clamping platform 1 needs to be moved downwards, the locking structure 6 first removes the fixed constraint on the support rod 41, activating the second drive structure 5. This second drive structure 5 applies a driving force towards the main shaft 2 to the support rod 41, which is directly connected to it. The support rod 41 moves towards the main shaft 2 along the slide bar 311 on the V-frame 3, triggering the transmission action of the first drive structure 421. The transmission rod 4213, hinged to the support rod 41, moves accordingly. Since the hinge point between the transmission rod 4213 and the support rod 41 is fixed, the transmission rod 4213 rotates around this hinge point. During this rotation, the angle between the transmission rod 4213 and the support rod 41 gradually decreases. The vertical distance between the ends gradually increases, providing a power basis for the movement of the drive block 4212. At this time, the drive block 4212 moves along the axis of the first guide rod 4211. At the same time, the transmission rod 4213 hinged to the other side of the drive block 4212 moves synchronously with the drive block 4212, applying a pulling force toward the first guide rod 4211 to another support rod 41 that is not directly driven by the second drive structure 5. The first drive structure 421 converts the driving force of the second drive structure 5 on a single support rod 41 into synchronous driving of the two support rods 41, thereby avoiding problems such as inconsistent movement speed of the two support rods 41 and tilting of the clamping platform 1 caused by individual driving.

[0041] Reference Figure 5 and Figure 6 As shown: The first drive structure 421 also includes a first linear driver 4214, which is used to control the drive block 4212 to move along the first guide rod 4211.

[0042] When the clamping platform 1 needs to be rotated, if the position of the drive block 4212 is not fixed, the second drive structure 5 will drive the connected support rod 41 to move, and the first drive structure 421 will drive the other support rod 41 to move in the same direction, making it impossible to rotate the clamping platform 1. Therefore, a first linear actuator 4214 is set. When the two support rods 41 are driven to move closer to each other, the first linear actuator 4214 provides additional force to the movement of the drive block 4212, making the drive block 4212 move more smoothly along the first guide rod 4211. During the rotation of the clamping platform, the first linear actuator 4214 fixes the position of the drive block 4212 on the first guide rod 4211. Therefore, the transmission rods 4213 on both sides of the drive block 4212 will not rotate, and the distance between the two support rods 41 can remain fixed. When the second drive structure 5 drives the connected support rod 41 to move towards the spindle 2, the other support rod 41 can move away from the spindle 2, thereby avoiding the interference problem of the support rods 41 moving in the same direction, so that the two support rods 41 can move in opposite directions, ensuring that the clamping platform 1 can tilt smoothly.

[0043] Reference Figure 7 and Figure 8 As shown: The second drive structure 5 includes a transmission block 51, a third guide rod 52, and a linear drive assembly 53; the transmission block 51 is connected to one end of the support rod 41 via a bearing; the third guide rod 52 is used to limit the movement direction of the transmission block 51; the linear drive assembly 53 is used to drive the transmission block 51 to move along the third guide rod 52.

[0044] Specifically, the linear drive assembly 53 includes a lead screw 531 and a rotary driver 532. The lead screw 531 is parallel to the third guide rod 52, and the transmission block 51 is threadedly connected to the lead screw 531. The rotary driver 532 is used to drive the lead screw 531 to rotate around its own axis.

[0045] After the bottom welding of the sweeper truck body is completed, the clamping platform 1 needs to be rotated to make the side wall nearly horizontal. At this time, the first linear actuator 4214 has fixed the position of the drive block 4212 to ensure the stability of the distance between the two support rods 41. The locking structure 6 removes the fixation of the support rods 41, and the rotary actuator 532 of the second drive structure 5 is activated, which drives the lead screw 531 to rotate in the forward direction. Through the threaded transmission, the transmission block 51 moves along the third guide rod 52 towards the main shaft 2. The transmission block 51 drives the support rod 41 connected to it to move along the slide rod 311 on the V-shaped frame 3 towards the main shaft 2 through the bearing. Since the first linear actuator 4214 has fixed the drive block 4212, With the position and angle of the transmission rod 4213 unchanged, the other support rod 41 will not move accordingly, forming a reverse movement of the two support rods 41, one near and one far. Therefore, the fixture platform 1 gradually tilts around the main shaft 2 until the side wall to be welded on the sweeper body is close to horizontal. At this time, the rotation drive 532 stops, the locking structure 6 fixes the position of the two support rods 41, and the rotation adjustment of the fixture platform 1 is completed, preparing for the flat welding of the side wall. The second drive structure 5 adopts the design of threaded transmission of lead screw 531. The threaded engagement between lead screw 531 and transmission block 51 has high-precision transmission characteristics, thereby ensuring accurate control of the tilt angle of fixture platform 1 and reducing the alignment error of the welding part.

[0046] Reference Figure 7 and Figure 9 As shown: The locking structure 6 includes a fixing block 61, a rectangular frame 62 and two self-pressurizing components 63; the fixing block 61 is connected to one end of the support rod 41 through a bearing; the rectangular frame 62 is connected to the V-shaped frame 3; the two self-pressurizing components 63 are respectively arranged inside the rectangular frame 62 and on both sides of the fixing block 61, and the two self-pressurizing components 63 are used to clamp and lock the position of the fixing block 61.

[0047] Although the second drive structure 5 has the ability to lock the position of the transmission block 51, relying solely on the second drive structure 5 to lock the position of one support rod 41 will still cause the other support rod 41 to tend to move downward along the first guide rod 4211. By setting a fixing block 61 and two self-pressurizing components 63, the two self-pressurizing components 63 fix the position of the fixing block 61 from both sides of the fixing block 61. The fixing block 61 prevents the support rod 41 connected to it from moving downward. By clamping the fixing block 61 with the self-pressurizing components 63 on both sides, the downward movement of the support rod 41 is prevented from the root. Combined with the unilateral locking of the second drive structure 5, the positions of the two support rods 41 are fixed, ensuring that the fixture platform 1 maintains a stable angle and height during the welding process.

[0048] Reference Figure 9 and Figure 10 As shown: The self-pressurizing assembly 63 includes a pressing plate 631 and a plurality of fourth guide rods 632; the pressing plate 631 has a plurality of slots for locking the fixing block 61; the plurality of fourth guide rods 632 are equally spaced on the pressing plate 631, the fourth guide rods 632 are slidably connected to the rectangular frame 62, and the fourth guide rods 632 are fitted with elastic members 633 that provide a thrust toward the fixing block 61.

[0049] The elastic element 633 can be a spring. The spring applies a thrust to the clamping plate 631, causing the clamping plate 631 to drive the fourth guide rod 632 to slide axially toward the fixed block 61 until the slot on the clamping plate 631 is fully engaged with the fixed block 61. At the same time, the synchronous clamping of the clamping plates 631 on both sides forms a symmetrical clamping force on the fixed block 61. After the clamping plate 631 is engaged with the fixed block 61 through the slot, the fixed block 61 is restricted to its current position inside the rectangular frame 62 and cannot move further. Since the fixed block 61 is rigidly connected to the support rod 41 through the bearing, this constraint effect is effective. The force is synchronously transmitted to the support rod 41, preventing it from sliding along the slide bar 311 on the V-shaped frame 3. Combined with the locking of the other support rod 41 by the second drive structure 5, the two support rods 41 are fixed in both directions, ensuring the stability of the clamping platform 1. The clamping action of the self-clamping assembly 63 is automatically completed by the thrust of the elastic element 633, without the need for a complex transmission process. The response time from the removal of external force to the completion of clamping is short. When unlocking, only external force needs to be applied to quickly release the constraint. The overall operation process is simple and efficient, thereby shortening the time for adjusting and locking the position of the support rod 41. Reference Figure 9 and Figure 11 As shown: The locking structure 6 also includes an unlocking component 64, which is used to unlock the two self-pressurizing components 63 locking the fixing block 61.

[0050] Specifically, the unlocking component 64 includes a second linear driver 641 and two drive plates 642. The second linear driver 641 is fixed on the rectangular frame 62, and both drive plates 642 are connected to the output end of the second linear driver 641. The two ends of the drive plates 642 are respectively hinged to the second linear driver 641 and the clamping plate 631.

[0051] When it is necessary to release the fixing block 61 secured by the two self-clamping components 63, the second linear actuator 641 is activated, controlling its output end to extend linearly toward the fixing block 61. Since the second linear actuator 641 is fixed on the rectangular frame 62, the linear motion of its output end can drive the two drive plates 642 hinged to it to move synchronously. The two drive plates 642 rotate around the hinge axis with the output end of the second linear actuator 641, and the angle between the drive plate 642 and the output end of the second linear actuator 641 gradually increases. At the same time, the other end of the drive plate 642 applies a pulling force through the hinge axial clamping plate 631. The direction of this force is opposite to the direction of the thrust of the elastic element 633. Conversely, to overcome the elastic potential energy of the elastic element 633, the two pressure plates 631 overcome the thrust of the elastic element 633 and move along the guide direction of the fourth guide rod 632. During this process, the pressure plates 631 drive the fourth guide rod 632 to move synchronously, and the elastic element 633 is further compressed to store elastic potential energy. At the same time, the slot on the pressure plate 631 disengages from the fixed block 61 until it is completely separated. The fixed block 61 is freed from the locking and clamping constraints and regains its ability to move freely along the internal channel of the rectangular frame 62. Power is provided by the second linear actuator 641, and the two drive plates 642 transmit power, thereby realizing the automatic unlocking of the two self-pressurizing components 63 locking the fixed block 61.

[0052] Reference Figure 1 A welding apparatus, including a welding positioning fixture for a sweeper truck body. The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A welding and positioning fixture for a sweeper truck body, comprising a fixture platform (1) for mounting various fixtures, characterized in that, The lower end of the fixture platform (1) is provided with a rotating structure, which includes a main shaft (2), two V-shaped frames (3), a support structure (4), two second drive structures (5) and two locking structures (6). Two V-shaped brackets (3) are respectively set at both ends of the main shaft (2), and two sliding connection components (31) are symmetrically arranged on the V-shaped brackets (3). The support structure (4) is set between two V-shaped frames (3). The support structure (4) includes two support rods (41). The support rods (41) are connected to the clamp platform (1). The two ends of the support rods (41) are respectively connected to the sliding connection components (31) on the two V-shaped frames (3). Two second drive structures (5) are respectively set on two V-shaped frames (3). The second drive structures (5) are used to drive the two support rods (41) to move toward the main shaft (2) and away from the main shaft (2) respectively. Two locking structures (6) are respectively set on two V-shaped frames (3), and the locking structure (6) and the second driving structure (5) are respectively set at both ends of the V-shaped frame (3). The locking structure (6) is used to fix the support rod (41).

2. The welding and positioning fixture for a sweeper truck body according to claim 1, characterized in that, The support structure (4) also includes a lifting structure (42), which is used to drive the two support rods (41) to move closer to or further away from the main shaft (2) at the same time.

3. The welding and positioning fixture for a sweeper truck body according to claim 2, characterized in that, The lifting structure (42) includes a first drive structure (421) and multiple support and guide components (422). The first drive structure (421) is connected to two support rods (41); Multiple support guide components (422) are equally spaced at the lower end of the fixture platform (1). The support guide components (422) are used to slide the two support rods (41) to the fixture platform (1).

4. The welding and positioning fixture for a sweeper truck body according to claim 3, characterized in that, The first drive structure (421) includes a first guide rod (4211) and multiple drive blocks (4212). The first guide rod (4211) is arranged parallel between the two support rods (41) and connected to the clamping platform (1); Multiple drive blocks (4212) are slidably mounted on the first guide rod (4211). Both ends of the drive block (4212) are provided with transmission rods (4213), and the two ends of the transmission rods (4213) are respectively hinged to the drive block (4212) and the support rod (41).

5. A welding positioning fixture for a sweeper truck body according to claim 4, characterized in that, The first drive structure (421) also includes a first linear driver (4214) for controlling the drive block (4212) to move along the first guide rod (4211).

6. The welding and positioning fixture for a sweeper truck body according to claim 1, characterized in that, The second drive structure (5) includes a transmission block (51), a third guide rod (52), and a linear drive assembly (53). The transmission block (51) is connected to one end of the support rod (41) via a bearing; The third guide rod (52) is used to limit the movement direction of the transmission block (51); The linear drive assembly (53) is used to drive the transmission block (51) to move along the third guide rod (52).

7. The welding and positioning fixture for a sweeper truck body according to claim 1, characterized in that, The locking structure (6) includes a fixing block (61), a rectangular frame (62), and two self-pressurizing components (63). The fixing block (61) is connected to one end of the support rod (41) by a bearing; The rectangular frame (62) is connected to the V-shaped frame (3); Two self-pressurizing components (63) are respectively set inside the rectangular frame (62) and on both sides of the fixing block (61). The two self-pressurizing components (63) are used to clamp and lock the position of the fixing block (61).

8. A welding positioning fixture for a sweeper truck body according to claim 7, characterized in that, The self-pressurizing assembly (63) includes a pressing plate (631) and a plurality of fourth guide rods (632); The clamping plate (631) has multiple slots for locking the fixing block (61); Multiple fourth guide rods (632) are equally spaced on the pressure plate (631). The fourth guide rods (632) are slidably connected to the rectangular frame (62). An elastic element (633) that provides a thrust toward the fixed block (61) is sleeved on the fourth guide rods (632).

9. A welding positioning fixture for a sweeper truck body according to claim 7, characterized in that, The locking structure (6) also includes an unlocking component (64) for unlocking the two self-pressurizing components (63) from locking the fixing block (61).

10. A welding apparatus, characterized in that, Including a welding and positioning fixture for a sweeper truck body as described in any one of claims 1-9.

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