Oil tank positioning, assembling and welding device

Abstract

The invention relates to the field of oil tank welding, and discloses an oil tank positioning, assembling and welding device which comprises a device base and an oil tank assembly arranged above the device base, a positioning mechanism is arranged on the device base, a bearing structure is inserted into the positioning mechanism in a threaded mode, and a plurality of movable bases capable of moving on the device base are arranged on the device base. The movable base is driven by an adjusting driving mechanism arranged on the device base to move, a positioning clamping mechanism capable of clamping the oil tank assembly is hinged to the movable base and driven by a transmission structure arranged on the positioning mechanism to rotate, and the two sides of the positioning clamping mechanism are each provided with an assembling and welding mechanism capable of adjusting the distance. The assembling and welding mechanism is driven by the positioning and clamping mechanism to rotate, the positioning and clamping mechanism is provided with the assembling and welding piece capable of conducting spot welding on the oil tank assembly, the assembling and welding efficiency is improved, an upper cover and a lower shell of the oil tank are automatically aligned through the positioning and clamping mechanism, spot welding of the assembling and welding piece is automatically completed, the steps of manual alignment and electric welding machine operation are reduced, manual intervention is reduced, and time is saved.

Description

Technical Field

[0001] The invention relates to the field of oil tank welding, and in particular to an oil tank positioning and welding device. Background Art

[0002] In the field of fuel tank manufacturing, the assembly welding of split fuel tanks is a key step in ensuring the tank's sealing and structural strength. The existing technology lacks a dedicated automated positioning and welding integrated device for the assembly welding of split fuel tanks. The welding process mainly relies on manual labor combined with simple equipment. The specific operation process and existing problems are as follows: Existing equipment for welding split fuel tanks is extremely simple, consisting primarily of a basic workbench and a fixed electric welder (including an electrode assembly), without specialized positioning, clamping, or adjustment mechanisms. The workbench merely supports the fuel tank assembly and lacks adjustment or positioning capabilities. The electric welder is often fixed in a single location, requiring manual adjustment of welding angles and positions, and lacks interlocking adaptation mechanisms with the tank assembly.

[0003] First, two workers are required to cooperate: one person places the lower shell on the workbench, and the other person buckles the upper cover of the fuel tank onto the lower shell. Both people need to manually align the edges of the two (usually by observing the flatness of the edges with the naked eye); after alignment, the two people need to maintain a stable posture and move the aligned edges to the electrode of the electric welder; then, the electric welder completes a spot weld; if spot welding is required on other edges of the fuel tank or different positions on the same edge, the two people need to synchronously adjust the posture of the fuel tank assembly (such as flipping or translating), and repeat the above spot welding operation again until all necessary welds are completed.

[0004] Two workers need to cooperate throughout the process to maintain the posture of the fuel tank assembly. Steps such as alignment, movement, and position adjustment take a long time. The fuel tank status needs to be readjusted every time a spot weld is completed. For multi-end and multi-point welding requirements, the operation cycle is greatly extended, which is difficult to meet mass production needs. In addition, the workers need to repeat the adjustment and alignment steps for a long time, which can easily lead to a decrease in operational stability due to fatigue, resulting in positioning and alignment errors. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above difficulties and provide a fuel tank positioning and welding device.

[0006] A fuel tank positioning and welding device comprises a device base and a fuel tank assembly arranged above the device base, the device base is provided with a positioning mechanism, the positioning mechanism is threadedly plugged with a bearing structure capable of bearing the fuel tank assembly, the device base is provided with a plurality of movable bases capable of moving on the device base, the movable bases are driven to move by an adjusting drive mechanism arranged on the device base, a positioning clamping mechanism capable of clamping the fuel tank assembly is hinged on the movable base, the positioning clamping mechanism is driven to rotate by a transmission structure arranged on the positioning mechanism, welding mechanisms capable of adjusting the spacing are provided on both sides of the positioning clamping mechanism, the welding mechanisms are driven to rotate by the positioning clamping mechanism, and the positioning clamping mechanism is provided with welding parts capable of spot welding the fuel tank assembly.

[0007] As an improvement, the mobile base includes a moving block that can move on the base of the device, the positioning and clamping mechanism includes a folding rod hinged to the top of the moving block at the bend, and the top of the folding rod is provided with a clamping member that abuts the end of the oil tank assembly. The transmission structure includes a slider driven by the positioning mechanism and moving up and down, and the slider is hinged with a hinge seat corresponding to the position of several mobile bases, and the hinge seat is provided with an abutment plate, and the end of the abutment plate is fixedly connected to a plug rod that is inserted into the bottom end of the folding rod.

[0008] As an improvement, the positioning mechanism includes a cover shell arranged on the base of the device, an electric telescopic rod is provided on the cover shell, a pillar passing through the slider is provided at the top of the electric telescopic rod, a limit block is provided at the top of the pillar, and a spring is provided between the limit block and the slider and is sleeved outside the pillar.

[0009] As an improvement, the bearing structure includes a bearing plate located above the limit block and supporting the oil tank assembly. An adjustment block is rotatably provided at the center of the bottom end of the bearing plate. The bottom end of the adjustment block is fixedly connected to a screw rod that is threadedly connected to the pillar. The bottom end of the bearing plate is provided with a kit that is sleeved on the outside of the folding rod.

[0010] As an improvement, the movable base also includes a horizontal block arranged on the movable block, a cavity is provided in the horizontal block and a through hole connected to the cavity is provided at the end thereof, the assembly welding mechanism includes a gear located in the cavity and a tooth plate meshing with the gear and passing through the through hole, one end of the tooth plate is fixedly connected to a side plate, a side rod is rotatably provided at the top end of the side plate, and both ends of the folding rod are fixedly connected to a transmission plate that slides through the side rod, and the assembly welding parts are arranged on the side rod.

[0011] As an improvement, a slot is provided on one end face of the side rod near the oil tank assembly, a partition is fixed in the slot and the partition is used to divide the upper slot and the lower slot, the welded parts include an electric telescopic rod 2 located in the lower slot, a top plate is provided at the top end of the electric telescopic rod 2, an electrode assembly 1 passing through the partition is fixed on the top plate, a spring 2 is provided between the partition and the top plate and is sleeved on the outside of the electrode assembly 1, the top end of the side rod is inserted into the electrode assembly 2, the top end of the electrode assembly 2 is fixedly connected to the fixed plate, a spring 3 is provided between the fixed plate and the top end of the side rod and is sleeved on the outside of the electrode assembly 2, and when the top plate moves up, the fixed plate is driven downward by the transmission assembly.

[0012] As an improvement, the transmission assembly includes a top rod fixed to the top plate and moving up and down in the side rod. The top end of the top rod extends out from the top of the side rod. The top of the side rod is located on one side of the top rod and a support plate is provided. The fixed plate is provided with a through groove that is transparent from top to bottom. The top end of the support plate is rotated to provide a driving plate in an inclined state. The top end of the driving plate abuts against the through groove, and the bottom end abuts against the top rod.

[0013] As an improvement, the clamping member includes a stud threaded through the top end of the folding rod, a clamping block abutting against the oil tank assembly is provided at the end of the stud, and a nut is sleeved on the external thread.

[0014] As an improvement, the base of the device includes a base body, a slide groove is provided on the base body, a slide rod is provided in the slide groove, the bottom end of the moving block is located in the slide groove and is slidably connected to the slide rod, an end plate is provided at the side end of the base body, and the adjustment drive mechanism includes a bidirectional screw that is rotatably arranged on one side end plate and passes through the cover shell, and a bevel gear 1 is provided below the bidirectional screw that is rotatably arranged on the base body, and bevel gear 1 is meshed with bevel gear 2 at both ends, and threaded rods are provided at the two ends of the bevel gear through the cover shell, and the end of the threaded rod passes through the other side end plate, and the bidirectional screw and the threaded rod end are both provided with an adjustment end 1, and the two ends of the bidirectional screw and the two threaded rods are respectively threadedly connected to several moving blocks.

[0015] The beneficial effects of the present invention compared with the prior art are: Improved welding efficiency: The positioning and clamping mechanism automatically aligns the upper and lower tank covers, automatically spot-welding the welded parts, reducing the need for manual alignment and welding machine operation, reducing manual intervention and saving time. The welding mechanism is linked to the positioning and clamping mechanism, so the welded parts are synchronously positioned after positioning is completed, reducing adjustment time before welding and significantly improving welding efficiency.

[0016] Precise structural linkage: The positioning mechanism drives the transmission structure, which drives the positioning clamping mechanism to rotate and clamp the oil tank. At the same time, the positioning clamping mechanism drives the welding mechanism to rotate synchronously, ensuring that the welded parts are accurately aligned with the welding position and ensuring welding accuracy.

[0017] Adaptable to multiple sizes: The bearing structure adjusts the height of the bearing plate through the adjustment block and the screw rod to adapt to oil tanks of different thicknesses; the adjustment drive mechanism drives the mobile base to move, adjusts the spacing of the positioning clamping mechanism, and adapts to oil tanks of different lengths and widths; the welding mechanism adjusts the spacing between the two welded parts through the gear and the tooth plate to adapt to the requirements of different spot welding positions on the same side. The overall adaptability is strong to various sizes of oil tanks.

[0018] Convenient loading and unloading: Initially, the bearing structure carries the oil tank, and after the positioning clamping mechanism clamps it, the bearing structure moves down and disengages. After welding is completed, the positioning clamping mechanism is released, and there is no need for manual continuous support of the oil tank. The loading and unloading operations are simple, reducing labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of an oil tank positioning and welding device of the present invention.

[0020] Figure 2 It is a schematic diagram of the overall structure of a fuel tank positioning and welding device of the present invention.

[0021] Figure 3 This is a partial structural breakdown diagram of a fuel tank positioning welding device of the present invention. Figure 1 .

[0022] Figure 4 This is a partial structural breakdown diagram of a fuel tank positioning welding device of the present invention. Figure 2 .

[0023] Figure 5 It is a transmission structure schematic diagram of an oil tank positioning and welding device of the present invention.

[0024] Figure 6 It is a schematic diagram of the bearing structure of a fuel tank positioning and welding device of the present invention.

[0025] Figure 7 It is a schematic diagram of a positioning clamping mechanism of a fuel tank positioning welding device of the present invention.

[0026] Figure 8 It is a schematic diagram of the welding mechanism of a fuel tank positioning welding device of the present invention.

[0027] Figure 9 It is a schematic diagram of the welded parts of a fuel tank positioning welding device of the present invention.

[0028] As shown in the figure: 1. Device base; 101. Base body; 102. End plate; 103. Slide groove; 104. Slide rod; 2. Mobile base; 201. Mobile block; 202. Cross block; 203. Through hole; 3. Adjustment drive mechanism; 301. Bidirectional screw; 302. Bevel gear 1; 303. Bevel gear 2; 304. Threaded rod; 305. Adjustment end 1; 4. Positioning mechanism; 401. Cover; 402. Electric telescopic rod 1; 403. Pillar; 404. Limit block; 5. Bearing structure; 501. Bearing plate; 502. Adjustment block; 503. Screw; 504. Kit; 6. Transmission structure; 601. Slider; 603. Articulated seat; 604. Abutment plate; 605. Insert rod; 606. Spring 1; 7. Positioning and clamping mechanism; 701. Folding rod; 702. Stud; 703. Clamping block; 704. Nut; 705. Transmission plate; 8. Assembly welding mechanism; 801. Tooth plate; 802. Gear; 803. Adjustment end 2; 804. Side plate; 805. Side rod; 806. Slot; 807. Partition; 9. Assembly welding parts; 901. Electric telescopic rod 2; 902. Top plate; 903. Electrode assembly 1; 904. Spring 2; 905. Top rod; 906. Electrode assembly 2; 907. Fixing plate; 908. Spring 3; 909. Through slot; 910. Support plate; 911. Drive plate. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings.

[0030] Combined with attachment Figure 1 , Attachment Figure 2 As shown: A fuel tank positioning and welding device includes a device base 1 and a fuel tank assembly arranged above the device base 1. The device base 1 is provided with a positioning mechanism 4, and the positioning mechanism 4 is threaded with a bearing structure 5 that can bear the fuel tank assembly. The device base 1 is provided with a plurality of mobile bases 2 that can move on the device base 1. The mobile base 2 is driven to move by an adjustment drive mechanism 3 arranged on the device base 1. A positioning clamping mechanism 7 that can clamp the fuel tank assembly is hinged on the mobile base 2. The positioning clamping mechanism 7 is driven to rotate by a transmission structure 6 arranged on the positioning mechanism 4. Both sides of the positioning clamping mechanism 7 are provided with welding mechanisms 8 that can adjust the spacing. The welding mechanism 8 is driven to rotate by the positioning clamping mechanism 7. The positioning clamping mechanism 7 is provided with a welding part 9 that can spot weld the fuel tank assembly.

[0031] Working principle of the present invention: The fuel tank assembly in the present invention is a split fuel tank, generally including an upper cover and a lower shell. During operation, the docked fuel tank assembly is placed on the bearing structure 5, and then the positioning mechanism 4 is activated to retract. During this process, the fuel tank assembly is driven downward, and the positioning mechanism 4 simultaneously drives a number of positioning clamping mechanisms 7 to rotate inward through the transmission structure 6. When the positioning clamping mechanisms 7 abut the fuel tank assembly and rotate into place, the upper cover and the lower shell of the fuel tank assembly are aligned. At this time, the positioning mechanism 4 is further retracted, and the positioning clamping mechanisms 7 clamp the fuel tank assembly under the action of the spring, and the bearing structure 5 is separated from the fuel tank assembly. When the positioning clamping mechanism 7 rotates inward, it can drive the welding mechanism 8 to rotate inward at the same time. When it is in place, the welding device of the welding piece 9 is located at the edge of the fuel tank assembly to be welded. Starting the welding piece 9 can complete the spot welding of the fuel tank assembly. Before welding, the staff can drive the movable base 2 to move on the device base 1 by adjusting the driving mechanism 3, and at the same time operate the welding mechanism 8 to adjust the distance between the two welding pieces 9 to meet the welding needs of fuel tank assemblies of different sizes.

[0032] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 7 , Attachment Figure 8 As shown: The mobile base 2 includes a mobile block 201 that can move on the device base 1. The positioning and clamping mechanism 7 includes a folding rod 701 hinged at a bend to the top of the mobile block 201. The top of the folding rod 701 is provided with a clamping member that abuts the end of the fuel tank assembly. The transmission structure 6 includes a slider 601 driven by the positioning mechanism 4 and moved up and down. The slider 601 is hinged with an articulated seat 603 corresponding to the position of the plurality of mobile bases 2. The articulated seat 603 is provided with an abutment plate 604. The end of the abutment plate 604 is fixedly connected to a rod 605 that is plugged into the bottom end of the folding rod 701. The positioning mechanism 4 includes a housing 401 mounted on the device base 1. The housing 401 is provided with an electric telescopic rod 1 402. A support 403 is provided at the top of the electric telescopic rod 1 402 and passes through a slider 601. A stop block 404 is provided at the top of the support 403. A spring 1 606 is provided between the stop block 404 and the slider 601 and is sheathed around the support 403. The clamping member includes a stud 702 threaded through the top of the folding rod 701, and a clamping block 703 is provided at the end of the stud 702 to abut against the oil tank assembly, and a nut 704 is sleeved on the external thread.

[0033] When aligning and clamping the fuel tank assembly: In order to have the functions of clamping and aligning the fuel tank assembly, the present invention is provided with a positioning clamping mechanism 7 arranged at the four ends of the fuel tank assembly. When the clamping work is performed, the electric telescopic rod 402 is started to retract, and the electric telescopic rod 402 presses the spring 606 downward through the limit block 404, and drives the slider 601 downward through the spring 606. The slider 601 drives the folding rod 701 to rotate inward through the insertion rod 605, and the clamping block 703 abuts against the edge of the fuel tank assembly. At this time, the folding rod 701 rotates inward into place, but the folding rod 701 is still not in a tilted state, that is, the top end is not in a vertical state. During this process, the clamping blocks 703 at the four ends of the fuel tank assembly can align the upper cover and the lower shell by squeezing; Then, the electric telescopic rod 402 is started to retract. At this time, the limit block 404 compresses the spring 606 driven by the support 403, and the spring 606 presses the slider 601. The slider 601 increases the force of the folding rod 701 to rotate inward through the insertion rod 605. In the present invention, the clamping block 703 is an elastic material (such as rubber, etc.). That is, when the electric telescopic rod 402 is started to retract, the folding rod 701 can gradually rotate inward slowly under the action of the compressed spring 606, and the clamping force of the clamping block 703 on the edge of the fuel tank assembly is gradually increased. The function of clamping the fuel tank assembly is achieved by adding the positioning and clamping mechanism 7 to the support structure 5. When the positioning and clamping mechanism 7 rotates inward and gradually clamps, the positioning mechanism 4 can drive the support structure 5 to continuously move downward. That is, before the positioning and clamping mechanism 7 rotates inward, the edge of the fuel tank assembly is higher than the clamping block 703. When the positioning and clamping mechanism 7 rotates inward, the clamping block 703 moves upward in the vertical direction. When the spring 1 606 is compressed, the support structure 5 and the fuel tank assembly, that is, the fuel tank assembly is clamped only by the positioning and clamping mechanism 7. After the fuel tank assembly is clamped, the welding work of the assembly weldment 9 can be started. The clamping member can fine-tune the distance between the clamping block 703 and the edge of the fuel tank assembly. That is, when the folding rod 701 is rotated inward and no gap is left between the clamping block 703 and the edge of the fuel tank assembly, the stud 702 can be rotated to drive the clamping block 703 to abut against the edge of the fuel tank assembly. Embodiment: In order to enable the staff to effectively judge whether the clamping block 703 in the present invention is clamping the edge of the fuel tank assembly, a stud 702 can also be set to slide through the top of the folding rod 701, and a clamping block 703 is set at one end of the stud 702 and a nut is connected to the external thread of the other end of the stud 702, and a spring is set between the clamping block 703 and the folding rod 701 and is sleeved on the outside of the stud 702. That is, when the clamping block 703 squeezes the edge of the fuel tank assembly, the spring will be squeezed according to the interaction force. During actual work, the staff can observe the compression degree of the spring when the folding rod 701 is tilted and turned straight, and thereby judge whether the edge of the fuel tank assembly is clamped.

[0034] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 5 , Attachment Figure 6 , Attachment Figure 7 , Attachment Figure 8 As shown: The supporting structure 5 includes a supporting plate 501 located above the limit block 404 and supporting the oil tank assembly. An adjustment block 502 is rotatably provided at the center of the bottom end of the supporting plate 501. The bottom end of the adjustment block 502 is fixedly connected to a screw rod 503 threadedly connected to the support 403. The bottom end of the supporting plate 501 is provided with a kit 504 that is sleeved on the outside of the folding rod 701.

[0035] When the thickness of the oil tank assembly changes, the adjustment block 502 can be manually rotated, and the adjustment block 502 drives the screw rod 503 to move up and down in the support 403, thereby achieving the function of adjusting the height of the supporting plate 501, so that the edge of the oil tank assembly can abut against the clamping block 703. Compared with the prior art of placing the oil tank assembly on a fixed supporting plate, it has the beneficial effect of a wider adaptability range.

[0036] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 7 , Attachment Figure 8 , Attachment Figure 9 As shown: The mobile base 2 also includes a transverse block 202 provided on the mobile block 201. The transverse block 202 has a cavity therein and a through hole 203 at its end that communicates with the cavity. The welding mechanism 8 includes a gear 802 located in the cavity and a toothed plate 801 meshing with the gear 802 and passing through the through hole 203. One end of the toothed plate 801 is fixedly connected to a side plate 804. The top of the side plate 804 is rotatably provided with a side rod 805. Both ends of the folding rod 701 are fixedly connected to a transmission plate 705 that slides through the side rod 805. The welding member 9 is provided on the side rod 805. A slot 806 is provided on one end surface of the side rod 805 near the fuel tank assembly, a partition 807 is fixedly connected in the slot 806 and the partition 807 divides the upper slot and the lower slot into two parts, the assembly weldment 9 includes an electric telescopic rod 901 located in the lower slot, a top plate 902 is provided at the top of the electric telescopic rod 901, an electrode assembly 903 passing through the partition 807 is fixedly connected to the top plate 902, a spring 904 is provided between the partition 807 and the top plate 902 and is sleeved on the outside of the electrode assembly 903, the top of the side rod 805 is plugged with the electrode assembly 906 with the bottom end located in the upper slot, the top of the electrode assembly 906 is fixedly connected to a fixed plate 907, a spring 908 is provided between the fixed plate 907 and the top of the side rod 805 and is sleeved on the outside of the electrode assembly 906, and when the top plate 902 moves upward, the fixed plate 907 is driven downward by the transmission assembly; The transmission assembly includes a top rod 905 fixed to the top plate 902 and moving up and down in the side rod 805. The top end of the top rod 905 extends out from the top of the side rod 805. The top of the side rod 805 is located on one side of the top rod 905 and a support plate 910 is provided. A through groove 909 that is transparent from top to bottom is provided on the fixed plate 907. The top end of the support plate 910 is rotatably provided with a driving plate 911 in an inclined state. The top end of the driving plate 911 abuts against the through groove 909, and the bottom end abuts against the top rod 905.

[0037] In order to make the welding position of the assembly weld 9 accurate, the assembly weld 9 is driven by the positioning clamping mechanism 7 and rotated simultaneously with the positioning clamping mechanism 7. That is, when the positioning clamping mechanism 7 is in contact with the fuel tank assembly, the edge of the fuel tank assembly is located in the upper groove and between the electrode assembly 1 903 and the electrode assembly 2 906. When the supporting structure 5 is separated from the fuel tank assembly, the electric telescopic rod 2 901 is started to extend. The electric telescopic rod 2 901 drives the electrode assembly 1 903 to move upward through the top plate 902 to contact the bottom end of the edge of the fuel tank assembly. The top plate 902 simultaneously drives the top rod 905 upward, and the top of the top rod 905 drives the driving plate 911 to attach Figure 9 Rotate the viewing angle counterclockwise, and the left end of the driving plate 911 presses down the fixing plate 907, and the fixing plate 907 drives the second electrode assembly 906 to move downward to contact the top end of the fuel tank assembly. At this time, the welding piece 9 can perform spot welding on the end of the fuel tank assembly. When the distance between the two spot welds on one side of the fuel tank assembly needs to be changed, the adjustment end 803 on the gear 802 can be manually rotated. When the gear 802 rotates forward, the side plate 804 can be driven to move away from the cross block 202 through the tooth plate 801, thereby gradually increasing the distance between the two welded parts 9 through the side rod 805. During the process, the side rod 805 can slide on the transmission plate 705.

[0038] Combined with attachment Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 , Attachment Figure 7 , Attachment Figure 8 As shown: The device base 1 includes a base body 101, a slide groove 103 is provided on the base body 101, a slide rod 104 is provided in the slide groove 103, the bottom end of the moving block 201 is located in the slide groove 103 and is slidably connected with the slide rod 104, an end plate 102 is provided at the side end of the base body 101, the adjustment drive mechanism 3 includes a bidirectional screw 301 rotatably arranged on one side end plate 102 and passing through the cover 401, a bevel gear 1 302 rotatably arranged on the base body 101 is provided below the bidirectional screw 301, both ends of the bevel gear 1 302 are meshed with bevel gear 2 303, the end of the bevel gear 2 303 is provided with a threaded rod 304 passing through the cover 401, the end of the threaded rod 304 passes through the other side end plate 102, the ends of the bidirectional screw 301 and the threaded rod 304 are both provided with an adjusting end 1 305, and the two ends of the bidirectional screw 301 and the two threaded rods 304 are respectively threadedly connected to a number of moving blocks 201.

[0039] When the length and width of the oil tank assembly to be welded are changed, the four moving blocks 201 can be driven to move on the base body 101 at the same time by adjusting the driving mechanism 3, and during the movement of the moving block 201, the folding rod 701 can move along the insertion rod 605 to achieve driven extension and retraction.

[0040] During implementation, the upper cover and lower shell of the split fuel tank are first docked and placed on the supporting plate 501 of the supporting structure 5. Based on the thickness of the fuel tank assembly, the edge of the fuel tank assembly is adjusted to the appropriate position by rotating the adjustment block 502. Then, based on the size of the fuel tank assembly, the relative position of the positioning clamping mechanism 7 and the fuel tank assembly is adjusted by adjusting the drive mechanism 3. To adjust the spacing between two welded components 9 on the same side, the adjustment end 2 803 of the gear 802 is rotated, and the side rod 805 slides along the transmission plate 705 to accommodate the position change. The electric telescopic rod 1 402 of the positioning mechanism 4 is activated to retract, causing the folding rod 701 to rotate inward. The clamping block 703 at the top of the folding rod 701 contacts the edge of the fuel tank assembly. The folding rod 701 then drives the welded component 9 to align with the edge of the fuel tank assembly to be welded. Start the welding assembly 9 to complete the spot welding; after welding is completed, the electric telescopic rod 2 901 contracts, the electrode assembly 1 903 and the electrode assembly 2 906 are reset, the electric telescopic rod 1 402 extends, the spring 1 606 is reset to drive the slider 601 to move upward, and the folding rod 701 is rotated outward to loosen the fuel tank assembly, and the welded fuel tank assembly can be removed.

[0041] The above description of the present invention and its embodiments is non-limiting. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs structures and embodiments similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A fuel tank positioning and welding device, comprising a device base (1) and a fuel tank assembly arranged above the device base (1), characterized in that: A positioning mechanism (4) is provided on the device base (1), a bearing structure (5) capable of bearing the oil tank assembly is threadedly connected to the positioning mechanism (4), a plurality of movable bases (2) capable of moving on the device base (1) are provided on the device base (1), the movable bases (2) are driven to move by an adjustment drive mechanism (3) provided on the device base (1), a positioning clamping mechanism (7) capable of clamping the oil tank assembly is hinged on the movable base (2), the positioning clamping mechanism (7) is driven to rotate by a transmission structure (6) provided on the positioning mechanism (4), welding mechanisms (8) capable of adjusting the spacing are provided on both sides of the positioning clamping mechanism (7), the welding mechanisms (8) are driven to rotate by the positioning clamping mechanism (7), and welding parts (9) capable of spot welding the oil tank assembly are provided on the positioning clamping mechanism (7).

2. The fuel tank positioning welding device according to claim 1, characterized in that: The movable base (2) includes a movable block (201) that can move on the device base (1); the positioning clamping mechanism (7) includes a folding rod (701) hinged at a bend to the top of the movable block (201); the top of the folding rod (701) is provided with a clamping member that abuts against the end of the oil tank assembly; the transmission structure (6) includes a slider (601) that is driven by the positioning mechanism (4) and moves up and down; the slider (601) is hinged with a hinge seat (603) corresponding to the position of the plurality of movable bases (2); the hinge seat (603) is provided with an abutting plate (604); the end of the abutting plate (604) is fixedly connected with an inserting rod (605) that is inserted into the bottom end of the folding rod (701).

3. The fuel tank positioning welding device according to claim 2, characterized in that: The positioning mechanism (4) includes a cover (401) disposed on the device base (1), an electric telescopic rod (402) disposed on the cover (401), a support (403) passing through a slider (601) disposed at the top end of the electric telescopic rod (402), a limit block (404) disposed at the top end of the support (403), and a spring (606) disposed between the limit block (404) and the slider (601) and sleeved outside the support (403).

4. The fuel tank positioning welding device according to claim 3, characterized in that: The bearing structure (5) includes a bearing plate (501) located above the limit block (404) and supporting the oil tank assembly. An adjusting block (502) is rotatably provided at the center of the bottom end of the bearing plate (501). A screw rod (503) threadedly connected to the support (403) is fixed to the bottom end of the adjusting block (502). A kit (504) is provided at the bottom end of the bearing plate (501) and is sleeved on the outside of the folding rod (701).

5. The fuel tank positioning welding device according to claim 2, characterized in that: The movable base (2) further comprises a transverse block (202) arranged on the movable block (201), a cavity being arranged in the transverse block (202) and a through hole (203) being arranged at an end thereof and communicating with the cavity, the assembly welding mechanism (8) comprising a gear (802) located in the cavity and a tooth plate (801) meshingly connected with the gear (802) and passing through the through hole (203), one end of the tooth plate (801) being fixedly connected to a side plate (804), a top end of the side plate (804) being rotatably provided with a side rod (805), both ends of the folding rod (701) being fixedly connected to a transmission plate (705) that slides through the side rod (805), and the assembly welding member (9) being arranged on the side rod (805).

6. The fuel tank positioning welding device according to claim 5, characterized in that: A slot (806) is provided on one end surface of the side rod (805) close to the oil tank assembly. A partition (807) is fixedly connected in the slot (806) and the partition (807) divides the upper slot and the lower slot into two parts. The assembly weldment (9) includes a second electric telescopic rod (901) located in the lower slot. A top plate (902) is provided at the top of the second electric telescopic rod (901). An electrode assembly (903) passing through the partition (807) is fixedly connected to the top plate (902). The partition (807) and the top plate (902) are connected to each other. A spring 2 (904) is provided between the top of the side rod (805) and is sleeved on the outside of the electrode assembly 1 (903). The top of the side rod (805) is connected to the electrode assembly 2 (906) with its bottom end located in the upper groove. The top of the electrode assembly 2 (906) is fixed with a fixed plate (907). A spring 3 (908) is provided between the fixed plate (907) and the top of the side rod (805) and is sleeved on the outside of the electrode assembly 2 (906). When the top plate (902) moves upward, the fixed plate (907) is driven downward by the transmission assembly.

7. The fuel tank positioning welding device according to claim 6, characterized in that: The transmission assembly includes a top rod (905) fixed to the top plate (902) and moving up and down in the side rod (805), the top end of the top rod (905) extends from the top of the side rod (805), the top of the side rod (805) is located on one side of the top rod (905) and is provided with a support plate (910), the fixed plate (907) is provided with a through groove (909) that is transparent from top to bottom, and the top end of the support plate (910) is rotatably provided with a driving plate (911) in an inclined state, the top end of the driving plate (911) is in contact with the through groove (909), and the bottom end is in contact with the top rod (905).

8. The fuel tank positioning welding device according to claim 2, characterized in that: The clamping member comprises a stud (702) threaded through the top end of the folding rod (701); a clamping block (703) abutting against the oil tank assembly is provided at the end of the stud (702); and a nut (704) is sleeved on the external thread.

9. The fuel tank positioning and welding device according to claim 3, characterized in that: The device base (1) includes a base body (101), a slide groove (103) is provided on the base body (101), a slide rod (104) is provided in the slide groove (103), the bottom end of the moving block (201) is located in the slide groove (103) and is slidably connected to the slide rod (104), an end plate (102) is provided at the side end of the base body (101), and the adjustment drive mechanism (3) includes a bidirectional screw (301) rotatably provided on one side end plate (102) and passing through the cover (401), and a bidirectional screw (301) is provided below the bidirectional screw (301) Bevel gear one (302) is provided on the base body (101), and both ends of bevel gear one (302) are meshed with bevel gear two (303). The end of bevel gear two (303) is provided with a threaded rod (304) passing through the cover (401), and the end of the threaded rod (304) passes through the other side end plate (102). The ends of the bidirectional screw (301) and the threaded rod (304) are both provided with an adjustment end one (305), and the ends of the bidirectional screw (301) and the two threaded rods (304) are respectively threadedly connected to the plurality of moving blocks (201).

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