An assembly tool for heavy truck casting cross beam

Abstract

This utility model relates to the field of crossbeam assembly technology, specifically to an assembly fixture for a heavy-duty truck casting crossbeam. A flipping device allows a fixed jig to rotate around a horizontal axis of rotation. A movable jig is mounted inside the fixed jig. Both the fixed and movable jigs are U-shaped structures, with their webs facing each other and parallel. The moving direction of the movable jig is perpendicular to the rotation axis of the fixed jig. Positioning components are provided on the inner sides of the webs of both the fixed and movable jigs. A guide rail is connected to the bottom edge of the fixed jig, perpendicular to its web. A slider slides along the guide rail, and a lifting plate is mounted on the slider. The lifting plate is parallel to the rotation axis of the fixed jig and perpendicular to its web. This utility model directly lifts the casting block and moves it precisely along the guide rail using a lifting structure, avoiding repeated adjustments and surface damage to the casting block caused by difficulty in controlling the landing point of the lifting equipment, thus improving assembly efficiency and product quality.

Description

Technical Field

[0001] This utility model relates to the field of crossbeam assembly technology, specifically to an assembly fixture for a heavy truck casting crossbeam. Background Technology

[0002] Cast crossbeams are the core load-bearing components connecting the chassis frame and the balance suspension in medium and heavy-duty truck chassis systems. Cast crossbeams have a typical H-shaped structure, consisting of symmetrically distributed connecting plates on both sides and a cast block in the middle. Compared to ordinary stamped crossbeams, cast crossbeams need to withstand greater loads and are usually cast from high-strength alloy materials, resulting in a larger weight per piece.

[0003] In the existing patent CN119566208A, entitled "A Riveting Fixture for a Vehicle Frame Crossbeam," the two bent connecting plates of the vehicle frame crossbeam are fixed to opposing positioning plate assemblies. One positioning plate assembly is then driven to slide close to the other, so that the two bent connecting plates respectively support both ends of the crossbeam body with corresponding riveting points. The corresponding riveting point anchors are then fixed. After flipping the plate, the corresponding riveting points on the other side are riveted to complete the initial assembly. However, the crossbeam body is directly placed on the two bent connecting plates, meaning that during the assembly of the vehicle frame crossbeam, the crossbeam body still needs to be manually placed between the two bent connecting plates.

[0004] However, the above technical solution is only applicable to ordinary crossbeams. For cast crossbeams, the weight of the cast block between the two connecting plates is much greater than that of the ordinary crossbeam body. When using the above technical solution, it is difficult for manual labor to directly lift and place the cast block between the two connecting plates. Therefore, lifting equipment is required to lift the cast block and align it with the connection point on the two connecting plates. The assembly efficiency is slow. Since it is difficult for the lifting equipment to accurately control the landing point, repeated adjustments are required afterward, which will also damage the surface of the cast block, affecting product quality and installation accuracy. Utility Model Content

[0005] To address the problem that existing assembly fixtures for chassis crossbeams are unsuitable for cast crossbeams that are significantly heavier than ordinary chassis crossbeams, and that existing assembly methods require lifting equipment to suspend the cast blocks and align them with the connection points of the two connecting plates (resulting in slow assembly efficiency), and that repeated adjustments due to the difficulty in precisely controlling the landing point of the lifting equipment can damage the surface of the cast blocks, affecting product quality and installation accuracy, this invention provides an assembly fixture for heavy-duty truck cast crossbeams.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An assembly fixture for a heavy-duty truck casting crossbeam includes a flipping device rotatably connected to a fixed jig. The rotation axis of the fixed jig is horizontally set, and a movable jig is movably mounted inside the fixed jig. Both the fixed jig and the movable jig are U-shaped structures with their openings facing each other. The webs of the fixed jig and the movable jig are parallel, and the moving direction of the movable jig is perpendicular to the rotation axis of the fixed jig. Positioning components are provided on the inner sides of the webs of both the fixed jig and the movable jig, which can fix the connecting plate of the casting crossbeam. A guide rail is connected to one edge of the middle part of the web of the fixed jig. The extension direction of the guide rail is perpendicular to the surface of the web of the fixed jig. A slider is slidably connected to the guide rail, and a lifting plate is provided on the slider. The surface of the lifting plate is parallel to the rotation axis of the fixed jig and perpendicular to the surface of the web of the fixed jig. The surface of the lifting plate can support the casting block of the casting crossbeam.

[0007] The above structural design utilizes a lifting structure composed of guide rails, sliders, and a lifting plate to directly lift the casting block and move it precisely along the guide rails. Only the casting block needs to be placed on the lifting plate using lifting equipment, avoiding repeated adjustments and surface damage caused by difficulty in controlling the landing point of the lifting equipment, thus improving assembly efficiency and product quality. Both the fixed and moving jigs are U-shaped with opposite openings. The moving jig can move in a direction perpendicular to the rotation axis of the fixed jig, and the distance between the fixed and moving jigs can be adjusted according to the length of the casting beam, adapting to different specifications of casting beams and offering strong versatility. Positioning components are installed on the inner side of the web plates of both the fixed and moving jigs to firmly fix the connecting plate of the casting beam, ensuring the stability of the connecting plate during assembly and providing a foundation for precise alignment between the casting block and the connecting plate, improving overall installation accuracy. The flipping device is rotatably connected to the fixed jig, and the rotation axis of the fixed jig is horizontal. During assembly, the fixed jig can be driven to flip, facilitating assembly operations on different sides of the casting beam without the need for manual handling of the flipped beam, reducing labor intensity.

[0008] As a preferred implementation of the assembly tooling for a heavy-duty truck casting crossbeam, the lifting plate has a T-shaped structure, including a crossbeam and a connecting vertical plate. The middle part of the crossbeam is connected to the connecting vertical plate. The extension direction of the crossbeam is consistent with the extension direction of the rotation axis of the fixed tire body, and the extension direction of the connecting vertical plate is consistent with the extension direction of the guide rail. The slider is connected to the side of the guide rail close to the fixed tire body, and the side of the slider away from the guide rail is fixedly connected to the side of the connecting vertical plate.

[0009] With the above structural design, the lifting plate is designed as a T-shape, and the extension direction of the crossbeam is consistent with the rotation axis of the fixed tire. This allows for more even weight support from the bottom of the cast block, preventing tilting or slippage due to uneven force during lifting and movement, thus improving lifting safety and stability. The extension direction of the connecting vertical plate is consistent with the guide rail, and the slider is fixedly connected to the connecting vertical plate. This ensures that when the lifting plate moves along the guide rail, the crossbeam always remains parallel to the rotation axis of the fixed tire, guaranteeing precise movement of the cast block and further improving the accuracy of docking with the connecting plate.

[0010] As a preferred method for assembling a heavy-duty truck casting crossbeam, the crossbeam plate has several positioning pins on its surface, and the center line of each positioning pin is perpendicular to the surface of the crossbeam plate.

[0011] With the above structural design, the crossarm plate is equipped with several positioning pins, and the center line of the pins is perpendicular to the crossarm plate surface. When the casting block is placed on the crossarm plate, the positioning pins can be inserted into the pre-set positioning holes at the bottom of the casting block, restricting the horizontal displacement of the casting block on the crossarm plate and preventing positional displacement of the casting block during movement or assembly, ensuring precise correspondence between the casting block and the connecting plate. Although it is still necessary to use lifting equipment to lower the casting block so that the positioning pins can be inserted into the positioning holes on the casting block, it is less difficult to operate compared to aligning the casting block with the connection points of the two connecting plates. After insertion, repeated adjustments are not required.

[0012] As a preferred implementation of the assembly tooling for heavy-duty truck casting crossbeams, each positioning component includes a positioning plate and several electromagnetic blocks. The plate surface of the positioning plate is parallel to the plate surface of the corresponding web plate. The positioning plate is detachably connected to the corresponding web plate. A positioning pin is provided on the plate surface of the positioning plate away from the corresponding web plate. The axis of the positioning pin is perpendicular to the plate surface of the positioning plate. Several electromagnetic blocks are fixedly connected to the plate surface of the corresponding web plate along the extension direction of the rotation axis of the fixed tire body.

[0013] The above structural design includes a positioning plate and an electromagnetic block. The second positioning pin on the positioning plate can be inserted into the positioning hole of the connecting plate (which can be an existing bolt hole on the connecting plate) to achieve mechanical positioning. When the electromagnetic block is energized, it generates magnetic force to attract the connecting plate. This dual fixing method effectively prevents the connecting plate from loosening or shifting during assembly, making it particularly suitable for fixing heavy cast beam connecting plates. The positioning plate is detachably connected to the web plate. When different specifications of cast beam connecting plates need to be assembled, the position of the positioning plate can be changed, and a positioning plate of the corresponding size and the position of the second positioning pin can also be replaced without replacing the entire tooling, reducing tooling replacement costs and improving tooling versatility.

[0014] As a preferred implementation of the assembly tooling for heavy-duty truck casting crossbeams, each positioning component includes two or three positioning plates, which are arranged along the extension direction of the rotation axis of the fixed jig; each positioning plate is detachably connected to the corresponding web plate by countersunk bolts.

[0015] With the above structural design, each positioning component has two or three positioning plates arranged along the rotation axis of the fixed tire body. These two or three positioning plates position the connecting plate from different locations, forming two-point or multi-point positioning. This prevents the connecting plate from rotating due to single-point positioning, further ensuring the positional accuracy of the connecting plate during assembly. The positioning plates are detachably connected to the web plate via countersunk bolts. This countersunk bolt connection is stable and easy to install and remove. When the positioning plates are worn or need replacement, they can be quickly disassembled and replaced, reducing maintenance difficulty and time costs. Simultaneously, the heads of the countersunk bolts do not protrude from the surface of the positioning plates, avoiding interference with the placement and fixation of the connecting plates. Multiple bolt holes for connecting to the countersunk bolts can be provided on the web plate of both the fixed and movable tire bodies, facilitating the movement of the positioning plates along the extension direction of the rotation axis of the fixed tire body.

[0016] As a preferred method for assembling a heavy-duty truck casting crossbeam, the web of the fixed body is provided with a guide rail on its side edge, and the web of the movable body is provided with two support plates on the same side as the guide rail. The surface of each support plate is parallel to the surface of the lifting plate, and the surface of each support plate is flush with the surface of the lifting plate.

[0017] Using the above structural design, the support plate can be used to support the corresponding connecting plate.

[0018] As a preferred implementation of the assembly tooling for a heavy-duty truck casting crossbeam, the guide rail is located between two support plates connected on the fixed jig body.

[0019] The above structural design allows the support plate to support the corresponding connecting plate more stably.

[0020] As a preferred method for assembling a heavy-duty truck casting crossbeam, a laser ranging device is connected inside the fixed tire body. The laser ranging device includes a laser transmitter and a laser reflector receiver, both of which face the web of the moving tire body.

[0021] The above structural design incorporates a laser ranging device inside the fixed jig, with both the laser emitter and receiver facing the web of the moving jig. This allows for real-time measurement of the distance between the fixed and moving jigs. Based on the measurement data, the position of the moving jig is precisely adjusted to ensure a perfect match between the distance between the fixed and moving jigs and the length of the cast crossbeam. This avoids assembly errors caused by distance deviations and improves assembly accuracy. The laser ranging device also monitors the moving distance of the moving jig in real time. When the moving jig approaches its limit position, it promptly issues a signal to prevent collisions between the moving jig and the fixed jig due to excessive movement, thus protecting the tooling structure from damage.

[0022] As a preferred implementation of the assembly tooling for a heavy-duty truck casting crossbeam, a set of lead screw devices and a limiting block are connected to the inner sides of the two wing plates of the fixed body. The moving body moves within the fixed body in a direction perpendicular to the rotation axis of the fixed body via the lead screw devices. Each set of lead screw devices includes a servo motor and a lead screw body. The output end of the servo motor is connected to one end of the lead screw body, and the other end of the lead screw body is rotatably connected to the limiting block. A moving block is connected to the outer side of the two wing plates of the moving body. The moving block has an internal threaded hole, and the outer circumferential surface of the lead screw body is threadedly connected to the corresponding internal threaded hole of the moving block.

[0023] The above structural design incorporates a lead screw device on the inner side of the fixed jig's wing plate. A servo motor drives the lead screw to rotate, and the lead screw moves the jig through the threaded engagement with the moving jig's moving block. The servo motor can precisely control the rotation speed and angle, thereby precisely controlling the moving jig's distance and speed, ensuring accurate positioning of the jig and meeting the assembly requirements of cast beams of different specifications. The lead screw device is used in conjunction with a limit block, which restricts the maximum moving distance of the jig, preventing it from detaching from the fixed jig due to excessive movement, protecting the tooling structure, and avoiding assembly accidents caused by uncontrolled jig positioning.

[0024] As a preferred embodiment of the assembly fixture for a heavy-duty truck casting crossbeam, the tilting device includes a base, on which are mounted an active tilting box and a driven tilting box, located on opposite sides of the extension direction of the rotation axis of the fixed jig. The active tilting box contains a second servo motor, which is connected to a gear reducer. The gear reducer includes a meshing pinion and a large gear, with the large gear coaxially connected to the active drive shaft. The active drive shaft is coaxially aligned with the rotation axis of the fixed jig, with one end of the active drive shaft extending out of the active tilting box and rotatably connected to it. An active flange is connected to the end of the active drive shaft near the fixed jig, and the active flange is connected to the outer side of one side wing plate of the fixed jig. The driven tilting box contains a driven drive shaft, which is coaxially aligned with the rotation axis of the fixed jig. One end of the driven drive shaft extends out of the driven tilting box near the fixed jig and is rotatably connected to it. A driven flange is connected to the end of the driven drive shaft near the fixed jig, and the driven flange is connected to the outer side of the other side wing plate of the fixed jig.

[0025] The above-described structural design includes an active tilting box and a passive tilting box. In the active tilting box, a servo motor drives the active drive shaft via a gear reducer. In the passive tilting box, the passive drive shaft rotates synchronously with the active drive shaft. Both drive shafts are connected to the fixed jig's wing plates via flanges, ensuring the fixed jig rotates smoothly around its horizontal axis. This prevents tilting or swaying during tilting, ensuring assembly safety. The servo motor can precisely control its speed and rotation angle, transmitting power through the gear reducer to accurately control the tilting angle of the fixed jig. This meets the angle requirements for assembling different surfaces of the cast beam, eliminating the need for manual angle judgment and improving assembly accuracy and efficiency. Both the active and passive drive shafts are coaxial with the fixed jig's rotation axis and securely connected to the fixed jig's wing plates via flanges. This ensures even weight distribution on the fixed jig and cast beam, preventing breakage of the drive shafts or flanges due to uneven stress during tilting, thus improving the structural strength and service life of the tilting device.

[0026] The beneficial effects of this utility model include: 1. The lifting structure, consisting of guide rails, sliders, and lifting plates, can directly lift the casting block and move it precisely along the guide rails. Simply place the casting block on the lifting plate with the help of lifting equipment. This avoids repeated adjustments and damage to the surface of the casting block caused by the difficulty in controlling the landing point of the lifting equipment, thus improving assembly efficiency and product quality.

[0027] 2. Both the fixed jig and the movable jig are U-shaped with their openings facing each other. The movable jig can move along a direction perpendicular to the rotation axis of the fixed jig. The distance between the fixed jig and the movable jig can be adjusted according to the length of the cast crossbeam, making it suitable for assembling cast crossbeams of different specifications and highly versatile.

[0028] 3. Positioning components are set on the inner side of the web of both the fixed and movable jigs to firmly fix the connecting plate of the cast crossbeam, ensuring the stability of the connecting plate during assembly, providing a basis for the precise docking of the cast block and the connecting plate, and improving the overall installation accuracy.

[0029] 4. The flipping device is rotatably connected to the fixed jig, and the axis of rotation of the fixed jig is horizontal. During the assembly process, the fixed jig can be driven to flip, which facilitates the assembly operation of different surfaces of the cast crossbeam. There is no need to manually handle the flipped crossbeam, reducing labor intensity. Attached Figure Description

[0030] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the assembly tooling for a heavy-duty truck casting crossbeam in a specific embodiment of this utility model; Figure 2 This is a schematic diagram of the base structure in a specific embodiment of the present utility model; Figure 3 This is a cross-sectional structural diagram of the active tilting box and the driven tilting box in a specific embodiment of this utility model; Figure 4 This is a cross-sectional structural diagram of the active tilting box in a specific embodiment of the present utility model; Figure 5 This is a cross-sectional structural diagram of the driven tilting box in a specific embodiment of the present utility model; Figure 6 This is a top view of a fixed tire body and a connecting plate in a specific embodiment of the present utility model. Figure 7 This is a top view of the movable tire body in a specific embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of the web plate for fixing the tire body in a specific embodiment of this utility model; Figure 9 This is a schematic diagram of the positioning plate in a specific embodiment of the present utility model; Figure 10 This is a schematic diagram of the structure for fixing the tire body in a specific embodiment of this utility model. Figure 1 ; Figure 11 This is a schematic diagram of the structure for fixing the tire body in a specific embodiment of this utility model. Figure 2 ; Figure 12This is a schematic diagram of the structure for fixing the tire body in a specific embodiment of this utility model. Figure 3 .

[0032] List of components and reference numerals: 1. Tilting device; 11. Base; 12. Active tilting box; 13. Driven tilting box; 14. Servo motor II; 15. Gear reducer; 16. Pinion; 17. Gear; 18. Active drive shaft; 19. Active flange; 110. Driven drive shaft; 111. Driven flange; 2. Fixed tire body; 3. Moving tire body; 4. Positioning assembly; 41. Positioning plate; 42. Electromagnetic block; 43. Positioning pin two; 5. Guide rail; 6. Slider; 7. Lifting plate; 71. Crossbeam; 72. Connecting vertical plate; 73. Positioning pin 1; 8. Support plate; 9. Laser rangefinder; 010. Lead screw assembly; 0101. Servo motor 1; 0102. Lead screw body; 011. Limit block; 012. Moving block; 013. Connecting plate; 014. PLC control system. Detailed Implementation

[0033] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Reference Figure 1-12 This embodiment proposes an assembly fixture for a heavy truck casting crossbeam, including a flipping device 1, which is rotatably connected to a fixed jig 2. The rotation axis of the fixed jig 2 is set horizontally, so that the fixed jig 2 can be flipped 360° around the rotation axis.

[0035] Reference Figure 1 In this embodiment, the flipping device 1 includes a base 11, on which an active flipping box 12 and a driven flipping box 13 are provided. The active flipping box 12 and the driven flipping box 13 are located on both sides of the extension direction of the rotation axis of the fixed tire body 2.

[0036] Reference Figure 3 and Figure 4The active tilting box 12 is equipped with a second servo motor 14, which is connected to a gear reducer 15. The gear reducer 15 includes a small gear 16 and a large gear 17 that mesh with each other. The large gear 17 is coaxially connected to the active drive shaft 18. The active drive shaft 18 is coaxially arranged with the rotation axis of the fixed tire body 2. One end of the active drive shaft 18 near the fixed tire body 2 extends out of the active tilting box 12 and is rotatably connected to the active tilting box 12. An active flange 19 is connected to one end of the active drive shaft 18 near the fixed tire body 2. The active flange 19 is connected to the outer side of one side wing plate of the fixed tire body 2.

[0037] Reference Figure 3 and Figure 5 The driven rotating box 13 is provided with a driven drive shaft 110. The driven drive shaft 110 is coaxially arranged with the rotation axis of the fixed tire body 2. One end of the driven drive shaft 110 near the fixed tire body 2 extends out of the driven rotating box 13 and is rotatably connected to the driven rotating box 13. One end of the driven drive shaft 110 near the fixed tire body 2 is connected to a driven flange 111. The driven flange 111 is connected to the outer side of the other wing plate of the fixed tire body 2.

[0038] Reference Figure 1 A movable tire body 3 is provided inside the fixed tire body 2. Both the fixed tire body 2 and the movable tire body 3 are U-shaped structures. The openings of the fixed tire body 2 and the movable tire body 3 are opposite each other, and the web of the fixed tire body 2 and the web of the movable tire body 3 are parallel. The moving direction of the movable tire body 3 is perpendicular to the rotation axis of the fixed tire body 2.

[0039] Reference Figure 6-10 Positioning components 4 are provided on the inner side of the web of both the fixed tire body 2 and the movable tire body 3. The positioning components 4 can fix the connecting plate 013 of the cast crossbeam. The connecting plate 013 of the cast crossbeam is... Figure 1 Two opposing C-shaped plates are present in each positioning assembly 4. Each positioning assembly 4 includes two to three positioning plates 41 and several electromagnetic blocks 42. The surface of the positioning plate 41 is parallel to the surface of the corresponding web plate. The positioning plate 41 is detachably connected to the corresponding web plate by countersunk bolts. The two to three positioning plates 41 in each positioning assembly 4 are arranged along the extension direction of the rotation axis of the fixed tire body 2. A positioning pin 43 is provided on the surface of the positioning plate 41 away from the corresponding web plate, and the axis of the positioning pin 43 is perpendicular to the surface of the positioning plate 41. Several electromagnetic blocks 42 are fixedly connected to the surface of the corresponding web plate along the extension direction of the rotation axis of the fixed tire body 2. Several electromagnetic blocks 42 are electrically connected to the on / off control module (not shown in the figure).

[0040] Reference Figure 10-12 One side edge of the mid-section of the abdominal plate of the fixed fetal body 2 (i.e. Figure 10A guide rail 5 is connected to the bottom edge of the web of the fixed jig body 2. The extension direction of the guide rail 5 is perpendicular to the surface of the web of the fixed jig body 2. A slider 6 is slidably connected to the top of the guide rail 5. A lifting plate 7 is provided on the top of the slider 6. The surface of the lifting plate 7 is parallel to the rotation axis of the fixed jig body 2 and perpendicular to the surface of the web of the fixed jig body 2. The surface of the lifting plate 7 can support the casting block of the casting crossbeam. Specifically, the lifting plate 7 has a T-shaped structure and includes a crossbeam 71 and a connecting vertical plate 72. The middle part of the crossbeam 71 is connected to the connecting vertical plate 72. The extension direction of the crossbeam 71 is consistent with the extension direction of the rotation axis of the fixed jig body 2, and the extension direction of the connecting vertical plate 72 is consistent with the extension direction of the guide rail 5. The top of the slider 6 is fixedly connected to the bottom surface of the connecting vertical plate 72. The top surface of the crossbeam 71 is provided with several positioning pins 73, and the center line of each positioning pin 73 is set perpendicular to the surface of the crossbeam 71.

[0041] Reference Figure 6-7 and Figure 9-11 The side edge of the guide rail 5 is provided in the middle of the web of the fixed tire body 2 (i.e., Figure 10 The bottom edge of the web of the fixed tire body 2 and the side edge of the middle of the web of the movable tire body 3 on the same side as the guide rail 5 (i.e. Figure 1 Two support plates 8 are provided on the bottom edge of the web of the moving tire body 3. The two support plates 8 of the fixed tire body 2 are located on the left and right sides of the guide rail 5. The two support plates 8 of the moving tire body 3 are arranged opposite to the two support plates 8 of the fixed tire body 2. The surface of each support plate 8 is parallel to the surface of the lifting plate 7, and the surface of each support plate 8 is flush with the surface of the lifting plate 7.

[0042] Reference Figure 6-7 and Figure 9-10 To enable the movable tire body 3 to move within the fixed tire body 2 in a direction perpendicular to the rotation axis of the fixed tire body 2, a set of lead screw devices 010 and a limiting block 011 are connected to the inner sides of the two wing plates of the fixed tire body 2. The movable tire body 3 moves within the fixed tire body 2 in a direction perpendicular to the rotation axis of the fixed tire body 2 via the lead screw devices 010. Each set of lead screw devices 010 includes a servo motor 0101 and a lead screw body 0102. The output end of the servo motor 0101 is connected to one end of the lead screw body 0102, and the other end of the lead screw body 0102 is rotatably connected to the limiting block 011. A movable block 012 is connected to the outer side of each of the two wing plates of the movable tire body 3. The movable block 012 has an internal threaded hole, and the outer circumferential surface of the lead screw body 0102 is threadedly connected to the corresponding internal threaded hole of the movable block 012.

[0043] Reference Figure 8A laser ranging device 9 is connected inside the fixed jig body 2. The laser ranging device 9 is installed on the web of the fixed jig body 2, close to a certain wing plate, so as not to affect the fixing of the connecting plate 013 of the cast crossbeam, nor to affect the movement of the movable jig body 3. The laser ranging device 9 includes a laser emitting head and a laser reflecting receiving head, both of which face the web of the movable jig body 3.

[0044] Reference Figure 1 In this embodiment, the side of the flipping device 1 is equipped with a PLC control system 014, which is electrically connected to the servo motor 0101, the laser rangefinder 9, the servo motor 14, and the power on / off control module. In this embodiment, the guide rail 5 can be a linear guide rail, and the driving device for the guide rail 5 and the slider 6 can be a linear motor (not shown in the figure), which is electrically connected to the PLC control system 014.

[0045] The working process of this embodiment is as follows: Power on the entire assembly fixture and start it up. Initialize the equipment status through the PLC control system 014 to ensure that the active tilting box 12 and the driven tilting box 13 of the tilting device 1, the lead screw device 010 on the fixed body 2, the laser rangefinder 9, and the electromagnetic block 42 of the positioning component 4 are all in normal standby state and there is no fault alarm.

[0046] Take the connecting plates 013 of the two cast crossbeams respectively and place them on the positioning components 4 on the inner side of the web of the fixed jig 2 and the inner side of the web of the movable jig 3. Insert the second positioning pin 43 on the positioning plate 41 on the inner side of the web of the fixed jig 2 into the positioning hole of the corresponding connecting plate 013 (existing bolt holes on the connecting plate 013 can be used). Similarly, insert the second positioning pin 43 on the positioning plate 41 on the inner side of the web of the movable jig 3 into the positioning hole of the other connecting plate 013 to achieve the initial positioning of the connecting plates 013. Next, control the power on / off control module through the PLC control system 014 to energize the electromagnetic blocks 42 on the webs of the fixed jig 2 and the movable jig 3. The electromagnetic blocks 42 generate magnetic force to attract the connecting plates 013, further fixing the connecting plates 013 firmly to the positioning components 4 and preventing the connecting plates 013 from shifting during subsequent assembly.

[0047] Using a lifting device, the casting block of the casting beam is lifted and slowly moved above the support plate 7 located on the middle side edge of the web of the fixed jig body 2. The lifting device is adjusted so that the preset positioning hole at the bottom of the casting block is aligned with the positioning pin 73 on the crossbeam 71 of the support plate 7. The casting block is then slowly lowered so that the positioning pin 73 is inserted into the positioning hole of the casting block, completing the positioning of the casting block on the support plate 7. After that, the lifting device is removed.

[0048] According to the length specifications of the cast crossbeam to be assembled, the PLC control system 014 sends commands to the servo motors 0101 on the inner sides of the two wing plates of the fixed jig 2. After the servo motors 0101 start, they drive the lead screw body 0102 to rotate. The lead screw body 0102 engages with the internal threaded hole of the moving block 012 on the outer side of the wing plate of the moving jig 3, driving the moving jig 3 to move within the fixed jig 2 in a direction perpendicular to the rotation axis of the fixed jig 2. During this process, the laser ranging device 9 inside the fixed jig 2 works in real time. The laser emitter emits laser light, and the laser reflector receives the laser light reflected back from the web of the moving jig 3, feeding back the measured distance data between the fixed jig 2 and the moving jig 3 to the PLC control system 014. The PLC control system 014 adjusts the operation of the servo motors 0101 in real time according to the feedback data until the distance between the fixed jig and the moving jig matches the length of the cast crossbeam. Then, the servo motors 0101 stop running, and the position of the moving jig 3 is fixed.

[0049] The linear motor is controlled by the PLC control system 014 to make the slider 6 at the bottom of the lifting plate 7 slide along the guide rail 5 on the web of the fixed body 2. Since the extension direction of the connecting vertical plate 72 of the lifting plate 7 is consistent with that of the guide rail 5, when the slider 6 slides, it drives the lifting plate 7 and the casting block to move along the extension direction of the guide rail 5 (perpendicular to the web surface of the fixed body 2) until the connecting end of the casting block is precisely aligned with the connecting end of the connecting plate 013 fixed on the fixed body 2 and the moving body 3. At this time, the slider 6 stops moving, and the alignment state between the casting block and the connecting plate 013 is maintained.

[0050] Workers used appropriate assembly tools (such as bolts, nuts, and other connectors) to assemble and fix the casting block to the joint of the two connecting plates 013, completing the initial connection assembly of the casting beam.

[0051] After one side of the cast crossbeam is assembled, the PLC control system 014 sends a command to the servo motor 14 in the active tilting box 12 of the tilting device 1. The servo motor 14 starts, and power is transmitted to the active drive shaft 18 via the gear reducer 15 (the small gear 16 meshes with the large gear 17). The active drive shaft 18 drives the fixed jig 2, connected to it via the active flange 19, to begin tilting around the horizontal rotation axis. The driven drive shaft 110 in the driven tilting box 13 rotates synchronously with the fixed jig 2, ensuring the stable tilting of the fixed jig 2. According to the assembly requirements, the fixed jig 2 is tilted to a suitable angle (so that the other side of the cast crossbeam to be assembled faces upwards), the servo motor 14 stops running, and the fixed jig 2 maintains its current tilting angle. The operator then performs subsequent assembly operations on the other side of the cast crossbeam, such as adding connecting parts and checking the assembly quality.

[0052] After all surfaces of the cast crossbeam are assembled and inspected, the PLC control system 014 controls servo motor 14 to run in reverse, causing the fixed jig 2 to rotate back to its initial horizontal position. Then, the control solenoid block 42 is de-energized, the magnetic force disappears, and the assembled cast crossbeam is removed from the fixture. Finally, the servo motor 0101 is controlled to run in reverse, driving the moving jig 3 to reset to its initial position. Components such as the laser rangefinder 9 and the lifting plate 7 also return to their initial state. The entire assembly process is complete, and the fixture awaits the next assembly task.

[0053] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembly fixture for a heavy-duty truck casting crossbeam, comprising a tilting device (1), characterized in that, The flipping device (1) is rotatably connected to the fixed body (2). The rotation axis of the fixed body (2) is set horizontally. A movable body (3) is provided inside the fixed body (2). Both the fixed body (2) and the movable body (3) are U-shaped structures. The openings of the fixed body (2) and the movable body (3) are opposite each other. The web of the fixed body (2) and the web of the movable body (3) are parallel. The moving direction of the movable body (3) is perpendicular to the rotation axis of the fixed body (2). Positioning components (4) are provided on the inner side of the web of the fixed body (2) and the inner side of the web of the movable body (3). The positioning components (4) can fix the connecting plate (013) of the cast crossbeam. A guide rail (5) is connected to one side edge of the middle part of the web of the fixed body (2). The extension direction of the guide rail (5) is perpendicular to the surface of the web of the fixed body (2). A slider (6) is slidably connected on the guide rail (5). A lifting plate (7) is provided on the slider (6). The surface of the lifting plate (7) is parallel to the rotation axis of the fixed body (2), and the surface of the lifting plate (7) is perpendicular to the surface of the web of the fixed body (2). The surface of the lifting plate (7) can support the casting block of the casting beam.

2. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 1, characterized in that, The lifting plate (7) has a T-shaped structure. The lifting plate (7) includes a crossbeam (71) and a connecting vertical plate (72). The middle part of the crossbeam (71) is connected to the connecting vertical plate (72). The extension direction of the crossbeam (71) is consistent with the extension direction of the rotation axis of the fixed tire (2). The extension direction of the connecting vertical plate (72) is consistent with the extension direction of the guide rail (5). The slider (6) is connected to the side of the guide rail (5) close to the fixed tire (2). The side of the slider (6) away from the guide rail (5) is fixedly connected to the side of the connecting vertical plate (72).

3. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 2, characterized in that, The crossbeam (71) has several positioning pins (73) on its surface, and the center line of each positioning pin (73) is perpendicular to the surface of the crossbeam (71).

4. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 1, characterized in that, Each positioning component (4) includes a positioning plate (41) and several electromagnetic blocks (42). The plate surface of the positioning plate (41) is parallel to the plate surface of the corresponding web plate. The positioning plate (41) is detachably connected to the corresponding web plate. A positioning pin (43) is provided on the plate surface of the positioning plate (41) away from the corresponding web plate. The axis of the positioning pin (43) is perpendicular to the plate surface of the positioning plate (41). Several electromagnetic blocks (42) are fixedly connected to the plate surface of the corresponding web plate along the extension direction of the rotation axis of the fixed tire body (2).

5. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 4, characterized in that, Each positioning component (4) includes two or three positioning plates (41) arranged along the extension direction of the rotation axis of the fixed tire body (2); each positioning plate (41) is detachably connected to the corresponding web plate by countersunk bolts.

6. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 1, characterized in that, The middle of the web of the fixed tire body (2) is provided with the side edge of the guide rail (5), and the middle of the web of the movable tire body (3) is provided with two support plates (8) on the same side as the guide rail (5). The surface of each support plate (8) is parallel to the surface of the lifting plate (7), and the surface of each support plate (8) is flush with the surface of the lifting plate (7).

7. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 6, characterized in that, The guide rail (5) is located between two support plates (8) connected to the fixed tire body (2).

8. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 1, characterized in that, The fixed tire body (2) is internally connected to a laser ranging device (9), which includes a laser transmitter and a laser reflector, both of which face the web of the moving tire body (3).

9. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 1, characterized in that, The inner sides of the two wing plates of the fixed tire body (2) are connected to a set of screw devices (010) and a limiting block (011). The moving tire body (3) moves in the fixed tire body (2) along the direction perpendicular to the rotation axis of the fixed tire body (2) through the screw devices (010). Each set of lead screw devices (010) includes a servo motor (0101) and a lead screw body (0102). The output end of the servo motor (0101) is connected to one end of the lead screw body (0102), and the other end of the lead screw body (0102) is rotatably connected to the limit block (011). A moving block (012) is connected to the outer side of each of the two wing plates of the moving body (3). The moving block (012) has an internal thread hole, and the outer circumferential surface of the lead screw body (0102) is threadedly connected to the internal thread hole of the corresponding moving block (012).

10. The assembly fixture for a heavy-duty truck casting crossbeam according to claim 1, characterized in that, The flipping device (1) includes a base (11), on which an active flipping box (12) and a driven flipping box (13) are provided. The active flipping box (12) and the driven flipping box (13) are located on both sides of the extension direction of the rotation axis of the fixed tire body (2). The active tilting box (12) is equipped with a second servo motor (14), which is connected to a gear reducer (15). The gear reducer (15) includes a small gear (16) and a large gear (17) that mesh with each other. The large gear (17) is coaxially connected to the active drive shaft (18). The active drive shaft (18) is coaxially set with the rotation axis of the fixed tire body (2). The end of the active drive shaft (18) close to the fixed tire body (2) extends out of the active tilting box (12), and the active drive shaft (18) is rotatably connected to the active tilting box (12). The end of the active drive shaft (18) close to the fixed tire body (2) is connected to an active flange (19), which is connected to the outer side of one side wing plate of the fixed tire body (2). The driven rotating box (13) is provided with a driven drive shaft (110). The driven drive shaft (110) is coaxial with the rotation axis of the fixed tire body (2). The end of the driven drive shaft (110) near the fixed tire body (2) extends out of the driven rotating box (13) and is rotatably connected to the driven rotating box (13). The end of the driven drive shaft (110) near the fixed tire body (2) is connected to a driven flange (111). The driven flange (111) is connected to the outer side of the other side wing plate of the fixed tire body (2).

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