Circulation conveying device for vehicle frame production

Abstract

The invention is suitable for the technical field of motor vehicle whole vehicle manufacturing, and provides a circulation conveying device for vehicle frame production, which comprises a suspension unit and a conveying shell, a controllable track unit is composed of a top track, side guide rails and a push-pull cylinder B. The side guide rails are fixed on two sides of the bottom in the conveying shell. The top rail is fixed to the top in the conveying shell through a plurality of push-pull cylinders B. The stable advancing assembly comprises a rack, a U-shaped bracket, a suspension main shaft, a gear and a double-output-shaft motor, the middle of the suspension main shaft is provided with a middle wheel matched with the top rail, the front side and the rear side of the suspension main shaft are provided with edge wheels matched with the side face guide rails, and the double-output-shaft motor is arranged in the U-shaped bracket on the suspension main shaft. And bearing rails are arranged on the front side and the rear side of the U-shaped bracket and are in sliding connection with the conveying shell. By flexibly disassembling and assembling the stable advancing assembly, convenient maintenance and adjustment are achieved, and meanwhile it is ensured that the suspension unit conducts stable and reliable suspension and lifting control on the vehicle frame.

Description

Technical Field

[0001] The present invention belongs to the technical field of motor vehicle manufacturing, and particularly relates to a transfer and conveying device for frame production. Background Art

[0002] An electric vehicle (EV) is a vehicle that uses one or more on-board electric motors as a power source, replacing the traditional internal combustion engine. The main types of electric vehicles include pure electric vehicles, plug-in hybrid electric vehicles, and range-extended electric vehicles. These vehicles are powered by a rechargeable battery pack to drive the electric motor, thereby propelling the vehicle forward.

[0003] During the frame production process, traditional transfer and conveying systems often face problems such as inconvenient maintenance, poor adjustment flexibility, and insufficient operating stability. These systems usually adopt a fixed track and component design, so that once maintenance or equipment layout adjustment according to production requirements is required, a large amount of time and labor costs must be spent on disassembly and reinstallation work.

[0004] Therefore, in view of the above current situation, there is an urgent need to develop a transfer and conveying device for frame production to overcome the deficiencies in current practical applications. Summary of the Invention

[0005] The purpose of the present invention is to provide a transfer and conveying device for frame production, aiming to solve the problems mentioned in the above background art.

[0006] The present invention is realized as follows. A transfer and conveying device for frame production includes a suspension unit and a conveying housing. The suspension unit is used to suspend the frame and control its lifting and lowering. The bottom of the conveying housing is provided with a bottom opening, and further includes: A controllable track unit, which includes a top track, side guide rails, and a push-pull cylinder B. The side guide rails are fixed to the front and rear sides of the inner bottom of the conveying housing, and a plurality of push-pull cylinders B are fixed in the middle of the inner top of the conveying housing. The output ends of the plurality of push-pull cylinders B are straddled and fixed with the top track; Stable traveling assembly, the stable traveling assembly includes a rack, a U-shaped bracket, a suspension main shaft, gears and a double-output shaft motor. Rack fixing grooves are provided on the front and rear sides of the bottom opening on the conveying housing, and a rack is fixed to the bottom of the rack fixing grooves. A middle wheel capable of cooperating with the top track is rotatably installed in the middle of the suspension main shaft, and side wheels capable of corresponding cooperation with two side guide rails are rotatably installed on the front and rear sides of the suspension main shaft. A U-shaped bracket is also fixed on the suspension main shaft, and a double-output shaft motor is fixed to the inner bottom of the U-shaped bracket. Gears capable of meshing with the two racks are fixed to the two output ends of the double-output shaft motor. Load-bearing tracks slidably connected to the conveying housing on both sides of the bottom opening are also fixed to the front and rear sides of the U-shaped bracket; the suspension unit is installed and fixed to the outer bottom of the U-shaped bracket.

[0007] Further technical solution, the middle wheel and the side wheels have the same structural dimensions, and the wheel grooves of the middle wheel and the side wheels are all rounded at the corners, and the bottom of the top track and the top of the side guide rails are all rounded at the corners; A plurality of the push-pull cylinders B are evenly distributed along the length direction of the top track.

[0008] Further technical solution, the two branches of the U-shaped bracket are fixedly connected to the suspension main shaft between the middle wheel and the side wheels; the double-output shaft motor is fixedly connected to the two side branches and the bottom of the U-shaped bracket; the two output shafts of the double-output shaft motor are also rotatably connected to the two side branches of the U-shaped bracket through bearings.

[0009] Further technical solution, the load-bearing track adopts an inverted L-shaped structure, and two load-bearing tracks are fixed to the front and rear sides of the U-shaped bracket respectively, and the two load-bearing tracks are slidably connected to the conveying housing above and below the rack fixing groove correspondingly; when the push-pull cylinder B drives the top track to descend and abut against the middle wheel, the side wheels abut against the side guide rails, the rack meshes with the gear, and the load-bearing track cooperates with the conveying housing to slide.

[0010] Further technical solution, the suspension unit includes a push-pull cylinder A and a hook. The push-pull cylinder A is vertically fixed to the outer bottom of the U-shaped bracket, and a W-shaped hook is rotatably installed at the output end of the push-pull cylinder A.

[0011] Further technical solution: The transfer and conveying device for frame production further includes adjustable start-stop units installed on the left and right sides of the U-shaped bracket of the stable traveling assembly. The adjustable start-stop unit includes a fixed panel detachably and fixedly connected to the U-shaped bracket. A peripheral cylinder is horizontally fixed on the fixed panel. A touch plate is slidably arranged inside the peripheral cylinder. An elastic member for elastically supporting the touch plate is also arranged inside the peripheral cylinder. A core rod that slides out from the end of the peripheral cylinder is fixed to the side of the touch plate away from the elastic member. A contact disk is fixed to the end of the core rod away from the touch plate. A push-pull cylinder C is also fixed to the inside of the peripheral cylinder. The output end of the push-pull cylinder C is fixed with a contact switch that is electrically connected to the double-output shaft motor and used to control it.

[0012] Further technical solution: The contact disk adopts a disk-shaped structure, and the corners of the contact disk are rounded; the elastic member adopts a spring, and when there is no external force, under the elastic force of the elastic member, the touch plate abuts against the end of the peripheral cylinder away from the fixed panel.

[0013] Further technical solution: When the contact switch is not triggered, the double-output shaft motor works normally; when the contact switch is triggered by the touch plate, the double-output shaft motor stops working.

[0014] Further technical solution: When the stable traveling assembly travels to the right, the elongation length of the push-pull cylinder C of the adjustable start-stop unit on the right side of the stable traveling assembly is greater than the elongation length of the push-pull cylinder C of the adjustable start-stop unit on the left side; when the stable traveling assembly travels to the left, the elongation length of the push-pull cylinder C of the adjustable start-stop unit on the right side of the stable traveling assembly is less than the elongation length of the push-pull cylinder C of the adjustable start-stop unit on the left side.

[0015] The transfer and conveying device for frame production provided by the present invention has the following beneficial effects: When it is necessary to disassemble and assemble the stable traveling assembly, only need to control the push-pull cylinder B to shorten, so that the stable traveling assembly is lifted upward to separate the gear and the rack, the conveying housing and the bearing track, the top track and the middle wheel, and the side wheel and the side guide rail, and then the stable traveling assembly can be quickly disassembled and assembled at the end of the conveying housing, that is, select an appropriate number of stable traveling assemblies, which is flexible and convenient. Similarly, after the push-pull cylinder B controls the cooperation of the top track and the middle wheel, by using the cooperation of the side wheel and the side guide rail, as well as the cooperation of the top track and the middle wheel, it can be ensured that the suspension main shaft is always in a stable traveling state. With the stable support of the rack for the gear and the supporting effect of the bearing track slidingly connected to the conveying housing, overall, the gear can be continuously and stably meshed with the rack, and by using the characteristics of the double-output shaft motor, the stable traveling assembly travels smoothly and reliably, which is beneficial for the suspension unit to suspend the frame and control its lifting.

[0016] In summary, the transfer and conveying device for frame production can achieve convenient maintenance and adjustment by flexibly disassembling and assembling the stable traveling components, while ensuring that the suspension unit stably and reliably suspends and controls the lifting of the frame. Description of the Drawings

[0017] Figure 1 FIG. 1 is a schematic diagram of the overall structure of the transfer and conveying device for frame production provided by an embodiment of the present invention; Figure 2 FIG. 2 Figure 1 is a schematic diagram of the structure from another perspective; Figure 3 FIG. 3 is a schematic diagram of the structure corresponding to a single stable traveling component in the transfer and conveying device for frame production provided by an embodiment of the present invention; Figure 4 FIG. 4 Figure 3 is a schematic diagram of the structure from another perspective; Figure 5 FIG. 5 Figure 3 is a schematic diagram of the structure with the conveying outer shell removed; Figure 6 FIG. 6 Figure 5 is a schematic diagram of the structure from another perspective; Figure 7 FIG. 7 is a schematic diagram of the main cross-sectional structure of the adjustable start-stop unit part in the transfer and conveying device for frame production provided by an embodiment of the present invention; Figure 8 FIG. 8 is a schematic diagram of the cooperation between two adjacent adjustable start-stop units when the transfer and conveying device for frame production provided by an embodiment of the present invention travels to the right; Figure 9 FIG. 9 is a schematic diagram of the cooperation between two adjacent adjustable start-stop units when the transfer and conveying device for frame production provided by an embodiment of the present invention travels to the left.

[0018] In the figures: 1 - suspension unit, 2 - conveying outer shell, 3 - top track, 4 - side guide rail, 5 - rack fixing groove, 6 - rack, 7 - bottom opening, 8 - U-shaped bracket, 9 - push-pull cylinder A, 10 - hook, 11 - adjustable start-stop unit, 12 - fixed panel, 13 - push-pull cylinder B, 14 - side wheel, 15 - middle wheel, 16 - suspension main shaft, 17 - gear, 18 - double-output shaft motor, 19 - stable traveling component, 20 - outer cylinder, 21 - inner core rod, 22 - contact disc, 23 - bearing track, 24 - push-pull cylinder C, 25 - contact switch, 26 - elastic member, 27 - trigger plate. Detailed Embodiment

[0019] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The following is a detailed description of the specific implementation of the present invention in combination with specific embodiments.

[0021] As Figures 1-6 shown, a transfer and conveying device for frame production provided by an embodiment of the present invention includes a suspension unit 1 and a conveying housing 2. The suspension unit 1 is used for suspending the frame and controlling its lifting and lowering. A bottom opening 7 is provided at the bottom of the conveying housing 2, and further includes: A controllable track unit, which includes a top track 3, side guide rails 4, and a push-pull cylinder B13. The front and rear sides of the inner bottom of the conveying housing 2 are fixed with side guide rails 4, and a plurality of push-pull cylinders B13 are fixed in the middle of the inner top of the conveying housing 2. The output ends of the plurality of push-pull cylinders B13 are fixedly spanned with a top track 3. Among them, the push-pull cylinder B13 is synchronously controlled by a controller, and the telescopic stroke error of each push-pull cylinder B13 is controlled within ±0.5 mm to ensure that the lifting action of the top track 3 remains horizontal; the control program of the controller presets two working modes: a maintenance mode (the push-pull cylinder B13 is fully retracted) and an operation mode (the push-pull cylinder B13 extends to the set stroke).

[0022] A stable traveling component 19, which includes a rack 6, a U-shaped bracket 8, a suspension main shaft 16, a gear 17, and a double-output shaft motor 18. Rack fixing grooves 5 are provided on the front and rear sides of the bottom opening 7 on the conveying housing 2, and a rack 6 is fixed to the bottom of the rack fixing grooves 5. A middle wheel 15 capable of cooperating with the top track 3 is rotatably installed in the middle of the suspension main shaft 16, and side wheels 14 capable of corresponding cooperation with the two side guide rails 4 are rotatably installed on the front and rear sides of the suspension main shaft 16. A U-shaped bracket 8 is also fixed on the suspension main shaft 16, and a double-output shaft motor 18 is fixed to the inner bottom of the U-shaped bracket 8. Gears 17 capable of meshing with the two racks 6 are fixed to the two output ends of the double-output shaft motor 18. Load-bearing tracks 23 that are slidably connected to the conveying housing 2 on both sides of the bottom opening 7 are also fixed on the front and rear sides of the U-shaped bracket 8; the suspension unit 1 is fixedly installed on the outer bottom of the U-shaped bracket 8.

[0023] In the embodiment of the present invention, when it is necessary to disassemble and assemble the stable traveling component 19, only need to control the push-pull cylinder B13 to shorten, so as to lift the stable traveling component 19 upward, separating the gear 17 from the rack 6, separating the conveying housing 2 from the bearing track 23, separating the top track 3 from the middle wheel 15, and separating the side wheel 14 from the side guide rail 4. Then, the stable traveling component 19 can be quickly disassembled and assembled at the end of the conveying housing 2, that is, select an appropriate number of stable traveling components 19, which is flexible and convenient. Similarly, after the push-pull cylinder B13 controls the cooperation of the top track 3 and the middle wheel 15, by using the cooperation of the side wheel 14 and the side guide rail 4, as well as the cooperation of the top track 3 and the middle wheel 15, it can ensure that the suspension main shaft 16 is always in a stable traveling state. With the stable support of the rack 6 for the gear 17 and the supporting effect of the sliding connection between the bearing track 23 and the conveying housing 2, as a whole, the gear 17 can be continuously and stably meshed with the rack 6, and by utilizing the characteristics of the double-output shaft motor 18, the stable traveling component 19 can travel smoothly and reliably, thus facilitating the suspension of the frame by the suspension unit 1 and controlling its lifting and lowering.

[0024] In summary, for the transfer and conveying device used in the production of the frame, by flexibly disassembling and assembling the stable traveling component 19, it realizes convenient maintenance and adjustment, and at the same time ensures the stable and reliable suspension and lifting control of the frame by the suspension unit 1.

[0025] As Figures 1-6 shown, as a preferred embodiment of the present invention, the conveying housing 2 can adopt a linear structure or a circular structure, which can be processed and welded into shape as required according to production needs, and a detachable structure is arranged to meet the disassembly and assembly requirements of the stable traveling component 19.

[0026] The middle wheel 15 and the side wheel 14 have the same structural dimensions, and the wheel grooves of the middle wheel 15 and the side wheel 14 are all rounded at the corners. The bottom of the top track 3 and the top of the side guide rail 4 are also rounded at the corners to reduce friction and improve the cooperation effect.

[0027] A plurality of push-pull cylinders B13 are evenly distributed along the length direction of the top track 3 to meet the requirement of stable lifting and driving of the top track 3.

[0028] The two branches of the U-shaped bracket 8 are fixedly connected to the suspension main shaft 16 between the middle wheel 15 and the side wheel 14, which is stable and reliable; the double-output shaft motor 18 is fixedly connected to both side branches and the bottom of the U-shaped bracket 8 to ensure its stability; the two output shafts of the double-output shaft motor 18 are also rotatably connected to both side branches of the U-shaped bracket 8 through bearings to ensure the stability of its power output.

[0029] The load-bearing track 23 adopts an inverted L-shaped structure. Two load-bearing tracks 23 are fixed on each of the front and rear sides of the U-shaped bracket 8, and the two load-bearing tracks 23 are slidably connected to the corresponding upper and lower parts of the transmission housing 2 of the rack fixing groove 5. When the push-pull cylinder B13 drives the top track 3 to descend and abut against the middle wheel 15, the side wheel 14 abuts against the side guide rail 4, the rack 6 is meshed and connected with the gear 17, and the load-bearing track 23 is slidably connected with the transmission housing 2, ensuring the stable traveling state of the stable traveling assembly 19, and overall realizing the stable matching state between the stable traveling assembly 19 and the transmission housing 2.

[0030] Regarding the structure of the suspension unit 1, specifically: The suspension unit 1 includes a push-pull cylinder A9 and a hook 10. The push-pull cylinder A9 is vertically fixed to the outer bottom of the U-shaped bracket 8. The output end of the push-pull cylinder A9 is rotatably installed with a W-shaped hook 10. Due to the structure and rotational arrangement of the hook 10, it is beneficial for the flexible and reliable hanging of the vehicle frame, and the force is balanced. The lifting of the vehicle frame can be controlled by the push-pull cylinder A9 to meet the processing displacement requirements. Among them, the hook 10 is made of high-strength alloy steel, and the contact surface between the hook 10 and the vehicle frame is designed with anti-slip lines, and the friction coefficient ≥ 0.4, ensuring that the vehicle frame has no sliding deviation during the lifting process.

[0031] As Figure 2 、 7 As shown in Figure -9, as a preferred embodiment of the present invention, the flow conveyor device for vehicle frame production further includes adjustable start-stop units 11 installed on the left and right sides of the U-shaped bracket 8 of the stable traveling assembly 19. The adjustable start-stop unit 11 includes a fixed panel 12 detachably and fixedly connected to the U-shaped bracket 8. A peripheral cylinder 20 is horizontally fixed on the fixed panel 12. A touch plate 27 is slidably arranged inside the peripheral cylinder 20. An elastic member 26 for elastically supporting the touch plate 27 is also arranged inside the peripheral cylinder 20. A core rod 21 that slides out from the end of the peripheral cylinder 20 is fixed to the side of the touch plate 27 away from the elastic member 26. A contact disk 22 is fixed to the end of the core rod 21 away from the touch plate 27. A push-pull cylinder C24 is also fixed to the inside of the peripheral cylinder 20. The output end of the push-pull cylinder C24 is fixed with a contact switch 25 that is electrically connected to the double-output shaft motor 18 and used to control it.

[0032] Preferably, the contact disk 22 adopts a disk-shaped structure, and the corners of the contact disk 22 are rounded; the elastic member 26 adopts a spring, and when there is no external force, under the elastic force of the elastic member 26, the touch plate 27 abuts against the end of the peripheral cylinder 20 away from the fixed panel 12.

[0033] Preferably, when the contact switch 25 is not triggered, the double-output shaft motor 18 operates normally; when the contact switch 25 is triggered by the trigger plate 27, the double-output shaft motor 18 stops operating. The triggering logic of the contact switch 25 is as follows: when the contact disk 22 contacts the contact disk 22 of the adjacent stable traveling component 19, the inner core rod 21 compresses the elastic member 26, and the trigger plate 27 moves toward the fixed panel 12 until the contact switch 25 is triggered and the double-output shaft motor 18 stops operating; when the contact disk 22 disengages, the elastic member 26 resets and the double-output shaft motor 18 restarts.

[0034] Preferably, as Figure 8 shown, when the stable traveling component 19 travels to the right, the extension length of the push-pull cylinder C24 of the adjustable start-stop unit 11 on the right side of the stable traveling component 19 is greater than the extension length of the push-pull cylinder C24 of the adjustable start-stop unit 11 on the left side, so that the contact switch 25 of the adjustable start-stop unit 11 on the right side of the stable traveling component 19 serves as a signal to start and stop the double-output shaft motor 18, while the contact switch 25 of the adjustable start-stop unit 11 on the left side of the stable traveling component 19 is ineffective. As Figure 9 shown, when the stable traveling component 19 travels to the left, the extension length of the push-pull cylinder C24 of the adjustable start-stop unit 11 on the right side of the stable traveling component 19 is less than the extension length of the push-pull cylinder C24 of the adjustable start-stop unit 11 on the left side, so that the contact switch 25 of the adjustable start-stop unit 11 on the left side of the stable traveling component 19 serves as a signal to start and stop the double-output shaft motor 18, while the contact switch 25 of the adjustable start-stop unit 11 on the right side of the stable traveling component 19 is ineffective.

[0035] It can be understood that after the contact disks 22 on two adjacent stable traveling components 19 collide, the elastic member 26 is compressed and the trigger plate 27 moves accordingly. When the contact switch 25 is triggered, the double-output shaft motor 18 stops operating and the stable traveling component 19 immediately stops moving. According to the different working efficiencies of the workstations, the automatic start and stop of the stable traveling component 19 are realized; after the front stable traveling component 19 restarts, the elastic member 26 of the two adjacent stable traveling components 19 extends until the contact disks 22 separate and the trigger plate 27 also releases the triggering state of the contact switch 25, and the double-output shaft motor 18 continues to operate stably and flexibly. In addition, the initial distance between the trigger plate 27 and the contact switch 25 can also be adjusted by the push-pull cylinder C24, that is, the buffer zone length is changed, so as to realize the adjustment control of the stop distance between the two stable traveling components 19 and further meet the requirements of different working conditions and production links.

[0036] Smoothing test of the stable traveling component 19: Use a three-axis acceleration sensor (accuracy ±0.01g) to measure the vibration amplitude of the vehicle frame during traveling. Test conditions: load 1000 kg, speed 1.0 m / s.

[0037] Table 1 Amplitude Test under Different Vibration Directions As can be seen from Table 1 above, in the present invention, through the multi-point cooperation of the middle wheel 15 and the top track 3, and the side wheel 14 and the side guide rail 4, and the sliding support of the bearing track 23, the vibration amplitude is significantly reduced.

[0038] In the above embodiments of the present invention, a transfer and conveying device for frame production is provided, and the working principle is summarized as follows: By controlling the shortening of the push-pull cylinder B13, the stable traveling assembly 19 is lifted upward, so that the gear 17 is separated from the rack 6, the transmission housing 2 is separated from the bearing track 23, the top track 3 is separated from the middle wheel 15, and the side wheel 14 is separated from the side guide rail 4, thereby realizing quick disassembly and assembly, and facilitating the selection of an appropriate number of stable traveling assemblies 19 according to needs.

[0039] The suspension unit 1 includes a push-pull cylinder A9 and a W-shaped hook 10. The lifting of the frame is controlled by the push-pull cylinder A9, and the reliable suspension of the frame is realized by using the structure of the hook 10 and its rotational arrangement, and the force balance is ensured.

[0040] When the push-pull cylinder B13 drives the top track 3 to descend and abut against the middle wheel 15, a sliding connection is formed between the side wheel 14 and the side guide rail 4, the rack 6 and the gear 17, and the bearing track 23 and the transmission housing 2, ensuring the stable traveling state of the suspension main shaft 16. The use of the double-output shaft motor 18 further enhances the smoothness and reliability during the traveling process.

[0041] In addition, adjustable start-stop units 11 are installed on both sides of each stable traveling assembly 19, which include components such as a contact disk 22, a trigger plate 27, an elastic member 26, and a contact switch 25. After adjacent two stable traveling assemblies 19 come into contact, the elastic member 26 is compressed, the trigger plate 27 moves to trigger the contact switch 25, causing the double-output shaft motor 18 to stop working, thereby realizing the automatic start and stop of the stable traveling assembly 19. By adjusting the extension length of the push-pull cylinder C24, the buffer zone length can be changed, and then the distance after stopping can be adjusted to adapt to different working conditions.

[0042] To sum up, the present invention not only realizes the efficient and stable suspension and conveying of the frame, but also provides a convenient maintenance method, and can flexibly adjust the relative positions and operating states of each component according to the specific situation of the production line, improving the adaptability and flexibility of the entire system.

[0043] The control of each component can adopt the PLC controller disclosed in the prior art, and the models and circuit connections of each component are not specifically limited and can be flexibly set in actual applications.

[0044] The circuits, electronic components, and modules involved are all prior arts, which can be fully implemented by those skilled in the art without further elaboration. The content protected by the present invention does not involve improvements to software and methods either.

[0045] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as falling within the scope described in this specification.

[0046] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be subject to the appended claims.

Claims

1. A conveying device for frame production, comprising a suspension unit (1) and a conveying shell (2), wherein the suspension unit (1) is used to suspend the frame and control its lifting and lowering, and the bottom of the conveying shell (2) is provided with a bottom opening (7), characterized in that: Also includes: A controllable track unit, the controllable track unit comprising a top track (3), side guide rails (4) and a push-pull cylinder B (13); the side guide rails (4) are fixed to the front and rear sides of the inner bottom of the transmission shell (2); a plurality of push-pull cylinders B (13) are fixed to the middle of the inner top of the transmission shell (2); the top track (3) is fixed across the output ends of the plurality of push-pull cylinders B (13); A stable travel component (19), the stable travel component (19) comprising a rack (6), a U-shaped bracket (8), a suspension spindle (16), a gear (17) and a dual-output shaft motor (18), a rack fixing groove (5) is opened on the transmission housing (2) at the front and rear sides of the bottom opening (7), and a rack (6) is fixed at the bottom of the rack fixing groove (5); a middle wheel (15) capable of cooperating with the top track (3) is rotatably installed in the middle of the suspension spindle (16), and wheels (17) capable of cooperating with the two top tracks (3) are rotatably installed on the front and rear sides of the suspension spindle (16). The side guide rails (4) correspond to the side wheels (14); a U-shaped bracket (8) is also fixed on the suspension main shaft (16); a dual-output shaft motor (18) is fixed to the inner bottom of the U-shaped bracket (8); two output ends of the dual-output shaft motor (18) are fixed with gears (17) that can mesh with two racks (6); the front and rear sides of the U-shaped bracket (8) are also fixed with load-bearing rails (23) that are slidably connected to the transmission shell (2) on both sides of the bottom opening (7); the suspension unit (1) is installed and fixed to the outer bottom of the U-shaped bracket (8).

2. The frame production flow conveying device according to claim 1, characterized in that: The structure dimensions of the middle wheel (15) and the side wheel (14) are the same, and the wheel grooves of the middle wheel (15) and the side wheel (14) are both rounded; The bottom of the top rail (3) and the top of the side rail (4) are both rounded; A plurality of push-pull cylinders B (13) are evenly distributed along the length direction of the top rail (3).

3. The frame production flow conveying device according to claim 1, characterized in that: The two branches of the U-shaped bracket (8) are fixedly connected to the suspension main shaft (16) between the middle wheel (15) and the side wheel (14); The dual-output shaft motor (18) is fixedly connected to both side branches and the bottom of the U-shaped bracket (8); The output shafts on both sides of the dual-output shaft motor (18) are also rotatably connected to the branches on both sides of the U-shaped bracket (8) via bearings.

4. The frame production flow conveying device according to claim 1, characterized in that: The bearing rail (23) adopts an inverted L-shaped structure, and two bearing rails (23) are fixed on the front and rear sides of the U-shaped bracket (8), and the two bearing rails (23) are correspondingly slidably connected to the upper and lower parts of the transmission housing (2) of the rack fixing groove (5); When the push-pull cylinder B (13) drives the top rail (3) to descend and abut against the middle wheel (15), the side wheel (14) abuts against the side guide rail (4), the rack (6) meshes with the gear (17), and the bearing rail (23) slides with the conveying housing (2).

5. The frame production flow conveying device according to claim 1, characterized in that: The suspension unit (1) comprises a push-pull cylinder A (9) and a hook (10); The push-pull cylinder A (9) is vertically fixed to the outer bottom of the U-shaped bracket (8), and a W-shaped hook (10) is rotatably mounted on the output end of the push-pull cylinder A (9).

6. The frame production flow conveying device according to any one of claims 1 to 5, characterized in that: The flow conveying device for frame production also includes adjustable start-stop units (11) installed on the left and right sides of a U-shaped bracket (8) of a stable travel component (19); The adjustable start-stop unit (11) comprises a fixed panel (12) detachably fixedly connected to a U-shaped bracket (8), an outer cylinder (20) being fixedly mounted horizontally on the fixed panel (12), a touch plate (27) being slidably mounted on the inner side of the outer cylinder (20), an elastic member (26) for elastically supporting the touch plate (27) being further mounted inside the outer cylinder (20), an inner core rod (21) being slidably extended from an end of the outer cylinder (20) being fixedly mounted on a side of the touch plate (27) away from the elastic member (26), and a contact plate (22) being fixedly mounted on an end of the inner core rod (21) away from the touch plate (27); A push-pull cylinder C (24) is also fixed on the inner side of the outer cylinder (20), and a contact switch (25) is fixed on the output end of the push-pull cylinder C (24) and is electrically connected to the dual-output shaft motor (18) and used to control it.

7. The frame production flow conveying device according to claim 6, characterized in that: The contact disk (22) adopts a disk-shaped structure, and the corners of the contact disk (22) are rounded; The elastic member (26) is a spring, and when there is no external force, under the elastic force of the elastic member (26), the touch plate (27) abuts against an end of the outer cylinder (20) away from the fixed panel (12).

8. The transfer conveying device for frame production according to claim 7, characterized in that: When the contact switch (25) is not triggered, the dual-output shaft motor (18) operates normally; When the contact switch (25) is triggered by the touch plate (27), the dual-output shaft motor (18) stops working.

9. The frame production flow conveying device according to claim 8, characterized in that: When the stable travel component (19) moves to the right, the extension length of the push-pull cylinder C (24) of the adjustable start-stop unit (11) on the right side of the stable travel component (19) is greater than the extension length of the push-pull cylinder C (24) of the adjustable start-stop unit (11) on the left side; When the stable travel component (19) moves to the left, the extension length of the push-pull cylinder C (24) of the adjustable start-stop unit (11) on the right side of the stable travel component (19) is smaller than the extension length of the push-pull cylinder C (24) of the adjustable start-stop unit (11) on the left side.

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