Industrial vehicle outer door frame welding equipment

Abstract

The present invention discloses an industrial vehicle outer gantry welding device, specifically relates to the technical field of welding devices, including a base, the inner surface of the guide slide rail is slidably connected to a welding robot arm, a main beam positioning structure is provided in the middle of the upper end of the base, the upper end of the main beam positioning structure and the left and right sides of the upper end of the base are jointly provided with side positioning structures, and the front and rear positioning structures are jointly provided at the front end of the main beam positioning structure and the rear of the upper end of the base. The industrial vehicle outer gantry welding device described in the present invention limits the main beam front and rear at the front side through the rear limit assembly in cooperation with the front limit assembly; drives the positioning support assembly to move to both sides and support the main beam through the cooperation of the positioning support assembly and the center driving assembly, and then clamps and fixes the support beam through the cooperation of the side driving assembly, the side positioning assembly and the center positioning assembly, and transports the support beam to different positions, thereby realizing welding operations on support beams at different positions and expanding the scope of application.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to welding equipment for an outer door frame of an industrial vehicle. Background Art

[0002] As a commonly used industrial vehicle, forklift is an indispensable handling tool in modern logistics and warehousing operations. As an important part of the forklift, the structural strength and stability of the outer mast are directly related to the performance and service life of the forklift. In the manufacturing process of the outer mast, welding is a key process step, which not only ensures the structural strength of the outer mast, but also improves its overall stability. The quality of welding directly affects the lifting capacity of the forklift. Therefore, precise welding of the outer mast is the key to ensuring the performance of the forklift.

[0003] Chinese patent publication number CN114102040B discloses an industrial vehicle outer gantry welding device, including a positioner and a welding tool, the positioner includes a rotatable flip bracket, the welding tool includes a track assembly arranged on the flip bracket, a movable positioning seat assembly arranged on the track assembly, a chain positioning assembly arranged on the walking device and used to position the chain seat, an upper beam positioning assembly arranged on the walking device and used to position the upper beam of the gantry, and a lower beam positioning assembly, a tilt cylinder positioning assembly, a middle beam positioning assembly and a middle-lower beam positioning assembly arranged on the flip bracket, and the movable positioning seat assembly includes a first roller in contact with the track assembly.

[0004] Although welding technology plays an important role in the manufacturing of industrial vehicle outer masts, the existing technology still has some defects. First, traditional welding positioning devices are often inconvenient to position and difficult to adapt to outer masts of different sizes and shapes, resulting in a narrow scope of application. In addition, poor repeat positioning accuracy is also a common problem, which will lead to unstable welding quality and affect product consistency. Summary of the invention

[0005] The main purpose of the present invention is to provide an industrial vehicle outer mast welding device, which can effectively solve the problems of existing devices such as inconvenient positioning, narrow application range, and inability to meet the welding requirements of outer mast support beams at different positions.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] An industrial vehicle outer door frame welding device comprises a base, a guide rail is provided at the upper end of the base, a welding mechanical arm is slidably connected to the inner surface of the guide rail, a control console is fixedly connected to the front end of the base, a main beam positioning structure is provided at the middle of the upper end of the base, a side positioning structure is provided at the upper end of the main beam positioning structure and at the left and right sides of the upper end of the base, and a front and rear positioning structure is provided at the front end of the main beam positioning structure and at the rear of the upper end of the base;

[0008] The main beam positioning structure includes a central driving assembly fixedly connected to the upper end of the base, and a plurality of positioning support assemblies are linearly distributed and fixedly connected to both ends of the central driving assembly. A guide groove for installing a side positioning structure is provided at the upper end of the central driving assembly.

[0009] Preferably, the front and rear positioning structure includes a front limit assembly arranged at the front end of the central drive assembly, a rear limit assembly is slidably connected to the rear upper end of the base, and a side drive assembly is fixedly connected to the side positioning structure at the rear end of the rear limit assembly.

[0010] Preferably, the rear limit assembly includes two slide grooves symmetrically opened at the rear part of the upper end of the base, the inner surfaces of the two slide grooves are slidably connected with rollers, the upper ends of the two rollers are commonly fixedly connected with a support plate, the rear ends of the two slide grooves are fixedly connected with a spring top plate, and the rear ends of the support plates are fixedly connected to the side drive assembly.

[0011] Preferably, the front limit assembly includes a slide groove three symmetrically opened at the front part of the central drive assembly, two inner surfaces of the slide grooves three are symmetrically slidably connected with arc rods, the ends of the two arc rods close to each other are fixedly connected with compression springs three fixedly connected to the inner surface of the slide groove three, the sides of the two arc rods close to each other are fixedly connected with cables two, and the ends of the two cables two away from the arc rods pass through the front of the inner surface of the slide groove three, extend to the front end of the central drive assembly and are fixedly connected with pull rings.

[0012] Preferably, the side drive assembly includes two bearing brackets which are symmetrically distributed on the left and right and fixedly connected to the rear end of the support plate, the inner surfaces of the two bearing brackets are rotatably connected to the winding shaft together, one of the bearing brackets is fixedly connected to a driving motor which is transmission-connected to the winding shaft on a side away from the middle of the winding shaft, the outer surface of the driving motor is wound with steel cable 2, the outer surface of the driving motor is symmetrically rotatably connected with steel cable 1, both ends of steel cable 1 and steel cable 2 are wound with the outer surface of the winding shaft and the winding directions of the two ends are opposite, and the side of steel cable 1 and steel cable 2 away from the winding shaft is fixedly connected to the side positioning structure.

[0013] Preferably, the central driving assembly includes a central block fixedly connected to the upper end of the base, the front end of the central block is rotatably connected to a handle, the rear end of the handle is fixedly connected to a threaded rod, the outer surface of the threaded rod is threadedly connected to a driving rod, the outer surface of the driving rod is linearly distributed and fixedly connected to a plurality of sliding plates, the outer surface of the driving rod located in front of the sliding plate is slidably connected to a fixed plate fixedly connected to the inner surface of the central block, and the left and right sides of the inner surface of the central block located between the sliding plate and the fixed plate are provided with through holes connected to adjacent positioning support assemblies.

[0014] Preferably, the positioning support assembly includes a fixed seat fixedly connected to the center block, the inner surface of the fixed seat is slidably connected with a sliding rod, the inner surface of the sliding rod is slidably connected with a hydraulic ejector pin, the inner surface of the sliding rod is slidably connected with a center rod on one side away from the hydraulic ejector pin, the piston part of the center rod is fixedly connected to a compression spring 2 fixedly connected to the inner surface of the sliding rod, the end of the sliding rod away from the fixed seat is fixedly connected to a mounting seat, the end of the mounting seat away from the fixed seat is symmetrically slidably connected with an expansion slider through a spring block, the end of the center rod away from the hydraulic ejector pin is fixedly connected to a spring telescopic rod, the end of the spring telescopic rod away from the center rod is fixedly connected to a vertical support plate, the upper and lower ends of the center rod are fixedly connected to a horizontal support rod through a telescopic rod, and the two horizontal support rods are rotatably connected to the vertical support plate through a connecting rod on one side close to the vertical support plate.

[0015] Preferably, the side positioning structure includes limit blocks which are symmetrically distributed on the left and right and fixedly connected to the upper end of the base, a slide groove 1 is provided on the upper ends of the two limit blocks, the inner surfaces of the two slide grooves 1 are slidably connected with side positioning components which are symmetrically distributed and fixedly connected to adjacent steel cables 1, and the inner surface of the guide groove is slidably connected with a center positioning component which is fixedly connected to steel cable 2.

[0016] Preferably, the center positioning assembly includes a sliding seat 2 that is slidably connected to the inner surface of the guide groove, the outer surface of the sliding seat 2 is fixedly connected to the outer surface of the steel cable 2, the upper end of the sliding seat 2 is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to a support seat, the inner surface of the support seat is symmetrically connected to an L-shaped block through a spring block, the middle part of the upper end of the support seat is slidably connected to a contact rod, and the lower part of the outer surface of the contact rod is symmetrically fixedly connected to a cable 1 that is fixedly connected to the adjacent L-shaped block.

[0017] Preferably, the side positioning assembly includes a sliding seat slidably connected to an inner surface of a slide groove, an outer surface of the sliding seat is fixedly connected to an outer surface of a steel cable, an upper end of the sliding seat is fixedly connected to a mounting plate, an inner surface of the mounting plate is slidably connected to a U-shaped block, an end of the inner surface of the U-shaped block close to the mounting plate is fixedly connected to a compression spring, and an end of the U-shaped block close to the center drive assembly is slidably connected to a plurality of spring pins distributed in an array.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention limits the main beam of the outer door frame at the rear side through the rear limit assembly, and cooperates with the front limit assembly to limit the main beam front and rear at the front side, and further drives the positioning support assembly to move to both sides and support the main beam through the cooperation of the positioning support assembly and the center driving assembly, and then clamps and fixes the support beam through the cooperation of the side driving assembly, the side positioning assembly and the center positioning assembly, and transports the support beam to different positions, so as to realize the welding operation of the support beams at different positions and expand the scope of application;

[0020] 2. The present invention pushes the supporting plate through the main beam to make it slide backward along the second slide slot until the main beam completely passes over the arc rod and enters the range of the positioning support assembly, and clamps and fixes the main beam from the front and rear sides through the action of the spring top plate, which is convenient for subsequent positioning and welding and improves the positioning efficiency; after welding is completed, the pull ring is pulled to retract the arc rod into the third slide slot, and the welded outer door frame is taken out by the action of the spring top plate and the external traction machine, which is convenient for loading and unloading operations;

[0021] 3. The present invention drives the driving rod to move forward and backward in the center block through the action of the handle and the threaded rod, so that the hydraulic oil therein is squeezed into the positioning support assembly through the action of the sliding plate and the fixed plate, thereby gradually pushing the mounting seat, the vertical support plate, and the horizontal support rod into the recess on the inner side of the main beam through the action of the fixed seat, the sliding rod and the hydraulic ejector pin, and the horizontal support rod and the vertical support plate are expanded outward under the pushing action of the center rod to position and fix the main beam, thereby avoiding the position deviation of the main beam during the welding process, affecting the welding accuracy and causing the outer gantry to deviate and affect the subsequent loading and use;

[0022] 4. The present invention utilizes a center positioning assembly to clamp and fix the support beam, and synchronously clamps and limits the left and right positions of the support beam through side positioning assemblies arranged on both sides. Furthermore, through the cooperation of steel cable 1, steel cable 2, side positioning assembly and center positioning assembly during the operation of the driving motor, the side positioning assembly is pulled by steel cable 1 to slide in the positioning support assembly, and the center positioning assembly is pulled by steel cable 2 to slide in the guide groove, thereby driving the outer door frame support beam to move at different positions of the main beam, adapting to welding requirements at different positions, and expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the main beam positioning structure and the front and rear positioning structures of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the side positioning structure of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the rear limit assembly of the present invention;

[0027] Figure 5 It is a structural schematic diagram of the front limit assembly of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the central drive assembly of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the positioning support assembly of the present invention;

[0030] Figure 8 It is a structural schematic diagram of the side drive assembly of the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the center positioning assembly of the present invention;

[0032] Fig.10 It is a schematic structural diagram of the side positioning assembly of the present invention.

[0033] In the figure: 1, base; 2, control console; 3, guide rail; 4, welding robot arm; 5, side positioning structure; 51, limit block; 52, slide groove 1; 53, side positioning assembly; 531, sliding seat 1; 532, mounting plate; 533, U-shaped block; 534, compression spring 1; 535, spring ejector; 54, center positioning assembly; 541, sliding seat 2; 542, electric telescopic rod; 543, support seat; 544, contact rod; 545, L-shaped block; 546, cable 1; 6, main beam positioning structure; 61, center drive assembly; 611, center block; 612, handle; 613, threaded rod; 614, sliding plate; 615, fixing plate; 616, drive rod; 62, positioning support assembly; 620 , spring telescopic rod; 621, fixed seat; 622, sliding rod; 623, hydraulic ejector; 624, compression spring two; 625, mounting seat; 626, expansion slider; 627, center rod; 628, horizontal support rod; 629, vertical support plate; 63, guide groove; 7, front and rear positioning structure; 71, rear limit assembly; 711, support plate; 712, slide groove two; 713, roller; 714, spring ejector plate; 72, front limit assembly; 721, arc rod; 722, slide groove three; 723, compression spring three; 724, pull ring; 725, cable two; 73, side drive assembly; 731, drive motor; 732, bearing bracket; 733, winding shaft; 734, steel cable one; 735, steel cable two. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] Embodiment 1, as Figure 1 As shown, an industrial vehicle outer door frame welding device comprises a base 1, a guide slide rail 3 is provided at the upper end of the base 1, a welding mechanical arm 4 is slidably connected to the inner surface of the guide slide rail 3, a control console 2 is fixedly connected to the front end of the base 1, a main beam positioning structure 6 is provided at the middle of the upper end of the base 1, a side positioning structure 5 is provided at the upper end of the main beam positioning structure 6 and at the left and right sides of the upper end of the base 1, and a front and rear positioning structure 7 is provided at the front end of the main beam positioning structure 6 and the rear of the upper end of the base 1;

[0036] It should be noted that the console 2 is a conventional controller used to control the start and stop of electrical equipment in the welding robot arm 4, the side positioning structure 5, and the front and rear positioning structure 7. This structure has been widely used in the prior art. In the present invention, it is only used to realize the start and stop function of controlling the electrical equipment, and its internal structure, operating principle, wiring, and control method are not described in detail.

[0037] In addition, the welding robot arm 4 is a robot arm equipped with a laser welding device, and an electric pulley is installed at the bottom thereof, which can drive the welding robot arm 4 to slide along the guide rail 3 to perform multi-angle welding on the outer door frame.

[0038] Further, to achieve the fixation of the main beam of the external portal, refer to Figure 2 The main beam positioning structure 6 includes a central driving component 61 fixedly connected to the upper end of the base 1, and a plurality of positioning support components 62 are linearly distributed and fixedly connected at both ends of the central driving component 61. A guide groove 63 for installing the side positioning structure 5 is opened at the upper end of the central driving component 61.

[0039] The positioning support assembly 62 is driven by the central driving assembly 61 to move to both sides and support the main beam, and the guide groove 63 on the upper part thereof is used to cooperate with the side positioning structure 5 to transport the support beam.

[0040] Further, to achieve the front and rear positioning of the external portal main beam, refer to Figure 2 The front and rear positioning structures 7 include a front limit assembly 72 arranged at the front end of the central drive assembly 61, a rear limit assembly 71 is slidably connected to the rear end of the upper end of the base 1, and a side drive assembly 73 fixedly connected to the side positioning structure 5 is fixedly connected to the rear end of the rear limit assembly 71.

[0041] The rear limit assembly 71 limits the main beam of the outer portal frame at the rear side, and the front limit assembly 72 is used to cooperate with the rear limit assembly 71 to limit the front side, thereby positioning the main beam. The side drive assembly 73 cooperates with the side positioning structure 5 to fix the outer portal support beam on the upper part of the main beam, and welds it through the welding robot arm 4. The side drive assembly 73 is used to drive the side positioning structure 5 to change its position, thereby adapting to the welding operation of the outer portal support beam at different positions.

[0042] Further, to achieve the support and positioning of the external portal support beam, refer to Figure 3 The side positioning structure 5 includes limit blocks 51 that are symmetrically distributed on the left and right and fixedly connected to the upper end of the base 1. A slide groove 52 is opened on the upper ends of the two limit blocks 51. The inner surfaces of the two slide grooves 52 are slidably connected with side positioning components 53 that are symmetrically distributed and fixedly connected to adjacent steel cables 734. The inner surface of the guide groove 63 is slidably connected with a center positioning component 54 that is fixedly connected to steel cables 735.

[0043] The support beam is clamped and fixed by the center positioning assembly 54, and the left and right positions are positioned synchronously by the side positioning assemblies 53 on both sides. Then, the center positioning assembly 54 is driven to slide in the center driving assembly 61 and the side positioning assembly 53 is driven to slide in the slide groove 52 by the cooperation of the side driving assembly 73, the center positioning assembly 54 and the side positioning assembly 53. In this way, the support beam is transported to different positions, and welding operations on support beams at different positions are realized, thereby expanding the scope of application.

[0044] During the operation of this embodiment, the rear limit assembly 71 is used to limit the main beam of the outer door frame at the rear side, and the front limit assembly 72 is used to limit the main beam front and rear at the front side. The positioning support assembly 62 is further driven to move to both sides and support the main beam through the cooperation with the center drive assembly 61. Then, the side drive assembly 73 is used to clamp and fix the support beam through the cooperation with the side positioning assembly 53 and the center positioning assembly 54, and the support beam is transported to different positions to realize welding operations on support beams at different positions, thereby expanding the scope of application.

[0045] Embodiment 2. Based on embodiment 1, this embodiment pushes the support plate 711 through the main beam to make it slide backward along the second slide groove 712 until the main beam completely passes over the arc rod 721 and enters the range of the positioning support assembly 62, and the main beam is clamped and fixed from the front and rear sides through the action of the spring top plate 714, which is convenient for subsequent positioning and welding and improves the positioning efficiency; after welding is completed, the pull ring 724 is pulled to make the arc rod 721 retract into the third slide groove 722, and the welded outer door frame is taken out by using the action of the spring top plate 714 and the external traction machine, which is convenient for loading and unloading operations.

[0046] Specifically, in order to cooperate with the front limit assembly 72 to position the main beam forward and backward, refer to Figure 4 The rear limit assembly 71 includes two slide grooves 712 symmetrically opened at the rear part of the upper end of the base 1, the inner surfaces of the two slide grooves 712 are slidably connected with rollers 713, the upper ends of the two rollers 713 are commonly fixedly connected with a support plate 711, the rear ends of the two slide grooves 712 are fixedly connected with a spring top plate 714, and the rear end of the support plate 711 is fixedly connected to the side drive assembly 73.

[0047] When the main beam moves backward on the base 1 , it pushes the support plate 711 , causing the roller 713 at the lower portion thereof to move backward until the spring top plate 714 is compressed and the main beam completely enters the rear side of the front limit assembly 72 .

[0048] Further, in order to cooperate with the rear limit assembly 71 to realize the positioning of the outer door frame main beam, refer to Figure 5The front limit assembly 72 includes a slide groove 3 722 symmetrically opened at the front part of the central driving assembly 61, and the inner surfaces of the two slide grooves 3 722 are symmetrically slidably connected with arc rods 721, and the ends of the two arc rods 721 close to each other are fixedly connected with compression springs 3 723 fixedly connected to the inner surface of the slide groove 3 722, and the sides of the two arc rods 721 close to each other are fixedly connected with cables 2 725, and the ends of the two cables 2 725 away from the arc rod 721 pass through the front part of the inner surface of the slide groove 3 722, extend to the front end of the central driving assembly 61, and are fixedly connected with pull rings 724.

[0049] The arc rod 721 is slidably connected to the slide groove 3 722 through the compression spring 3 723. The front part of the arc rod 721 close to the main beam is an arc surface. The main beam can directly push the arc rod 721 to enter the upper side of the base 1 until the main beam completely enters the rear part of the arc rod 721. At this time, the arc rod 721 pops out under the action of the compression spring 3 723 and limits the front part of the main beam.

[0050] Furthermore, by pulling the pull ring 724, the arc rod 721 can be driven to slide into the inside of the slide groove 3 722 through the cable 2 725 until the rear end of the arc rod 721 is completely separated from the main beam. At this time, the support plate 711 drives the welded outer door frame to move forward under the action of the rear spring top plate 714, so that the arc rod 721 will contact the inner side of the outer door frame instead of its front end after being extended. At this time, the outer door frame can be taken out by a traction machine.

[0051] Embodiment 3: Based on embodiment 2, this embodiment further drives the driving rod 616 to move forward and backward in the center block 611 through the action of the handle 612 and the threaded rod 613, so that the hydraulic oil therein is squeezed into the positioning support assembly 62 through the action of the sliding plate 614 and the fixed plate 615, thereby gradually pushing the mounting seat 625, the vertical support plate 629, and the horizontal support rod 628 into the recess on the inner side of the main beam through the action of the fixed seat 621, the sliding rod 622 and the hydraulic ejector pin 623, and the horizontal support rod 628 and the vertical support plate 629 are expanded outward under the push of the center rod 627 to position and fix the main beam, so as to avoid position deviation of the main beam during welding, which affects the welding accuracy and causes the outer door frame to deviate, affecting the subsequent loading and use.

[0052] Specifically, in order to realize the positioning and fixing of the gantry main beams on both sides by driving the positioning support assembly 62, refer to Figure 6The central driving assembly 61 includes a central block 611 fixedly connected to the upper end of the base 1, the front end of the central block 611 is rotatably connected to a handle 612, the rear end of the handle 612 is fixedly connected to a threaded rod 613, the outer surface of the threaded rod 613 is threadedly connected to a driving rod 616, and the outer surface of the driving rod 616 is linearly distributed and fixedly connected to a plurality of sliding plates 614, and the outer surface of the driving rod 616 is slidably connected to a fixed plate 615 fixedly connected to the inner surface of the central block 611 at a position located in front of the sliding plate 614, and the left and right sides of the inner surface of the central block 611 between the sliding plate 614 and the fixed plate 615 are provided with through holes connected to the adjacent positioning support assembly 62.

[0053] A worker can drive the threaded rod 613 to rotate by shaking the handle 612. At this time, the threaded rod 613 and the driving rod 616 are used to drive the driving rod 616 to move back and forth in the center block 611. In the process of moving back and forth, the driving rod 616 will drive the sliding plate 614 to move back and forth together. The part between the sliding plate 614 and the fixed plate 615 is filled with hydraulic oil. In the process of changing the distance between the sliding plate 614 and the fixed plate 615, the hydraulic oil will enter the positioning support assembly 62 or be drawn out from the positioning support assembly 62, thereby achieving the effect of driving the positioning support assembly 62 to move.

[0054] Further, in order to realize the support positioning of the main beam, refer to Figure 7 The positioning support assembly 62 includes a fixed seat 621 fixedly connected to the center block 611, a sliding rod 622 is slidably connected to the inner surface of the fixed seat 621, a hydraulic ejector pin 623 is slidably connected to the inner surface of the sliding rod 622, a center rod 627 is slidably connected to the inner surface of the sliding rod 622 away from the hydraulic ejector pin 623, and a compression spring 624 fixedly connected to the inner surface of the sliding rod 622 is fixedly connected to the end of the piston part of the center rod 627 away from the hydraulic ejector pin 623, and a mounting spring 624 is fixedly connected to the end of the sliding rod 622 away from the fixed seat 621. Seat 625, one end of the mounting seat 625 away from the fixed seat 621 is symmetrically connected to the expansion slider 626 through a spring block for sliding movement, one end of the center rod 627 away from the hydraulic ejector pin 623 is fixedly connected to the spring telescopic rod 620, one end of the spring telescopic rod 620 away from the center rod 627 is fixedly connected to the vertical support plate 629, the upper and lower ends of the center rod 627 are fixedly connected to the horizontal support rod 628 through the telescopic rod, and the two horizontal support rods 628 are rotatably connected to the vertical support plate 629 through a connecting rod on one side.

[0055] The hydraulic oil will first enter the fixing seat 621, thereby pushing the sliding rod 622 outward until the mounting seat 625 fits against the side wall of the main beam, and the sliding rod 622 cannot move further. At this time, the expansion slider 626 will enter the inner side of the main beam and be clamped on the inner side of the main beam under the spring;

[0056] At this time, the hydraulic oil will enter the inner cavity of the sliding rod 622 and push the hydraulic ejector pin 623 to move toward the main beam, and then push the center rod 627 and the vertical support plate 629 to move toward the inner wall of the main beam through the spring telescopic rod 620 until the vertical support plate 629 is attached to the surface of the main beam and compresses the spring telescopic rod 620. At this time, under the action of the connecting rod, the horizontal support rod 628 is driven to move in the upward and downward directions and fit against the inner walls on the upper and lower sides of the main beam.

[0057] Embodiment 4. Based on embodiment 3, this embodiment utilizes the center positioning assembly 54 to clamp and fix the support beam, and synchronously clamps and limits the left and right positions of the support beam through the side positioning assemblies 53 arranged on both sides. Furthermore, through the cooperation of steel cable 1 734, steel cable 2 735 and side positioning assemblies 53 and center positioning assembly 54 during the operation of the driving motor 731, the side positioning assembly 53 is pulled by steel cable 1 734 to slide in the positioning support assembly 62, and the center positioning assembly 54 is pulled by steel cable 2 735 to slide in the guide groove 63, thereby driving the outer portal support beam to move at different positions of the main beam, adapting to the welding requirements at different positions, and expanding the scope of application.

[0058] Specifically, the driving side positioning structure 5 is used to position the outer door frame support beam, see Figure 8 The side drive assembly 73 includes two bearing brackets 732 that are symmetrically distributed on the left and right and fixedly connected to the rear end of the support plate 711. The inner surfaces of the two bearing brackets 732 are connected to the winding shaft 733 for rotation together. One of the bearing brackets 732 is fixedly connected to a driving motor 731 that is transmission-connected to the winding shaft 733 on a side away from the middle of the winding shaft 733. A steel cable 2 735 is wound around the outer surface of the driving motor 731. A steel cable 1 734 is symmetrically rotated on the outer surface of the driving motor 731. Both ends of the steel cable 1 734 and the steel cable 2 735 are wound around the outer surface of the winding shaft 733 and the winding directions of the two ends are opposite. The side of the steel cable 1 734 and the steel cable 2 735 away from the winding shaft 733 is fixedly connected to the side positioning structure 5.

[0059] The rotation of the driving motor 731 will drive the winding shaft 733 to rotate, and wind the steel cable 1 734 and the steel cable 2 735 around the surface of the winding shaft 733. In this process, since the winding directions are opposite, the steel cable 1 734 and the steel cable 2 735 can drive the side positioning component 53 and the center positioning component 54 to be pulled in different directions during the forward and reverse rotation of the driving motor 731, thereby realizing flexible forward and backward movement.

[0060] Further, in order to clamp and fix the support beam, refer to Fig. 9The center positioning component 54 includes a sliding seat 541 that is slidably connected to the inner surface of the guide groove 63, the outer surface of the sliding seat 541 is fixedly connected to the outer surface of the steel cable 735, the upper end of the sliding seat 541 is fixedly connected to an electric telescopic rod 542, the output end of the electric telescopic rod 542 is fixedly connected to a support seat 543, the inner surface of the support seat 543 is symmetrically connected to an L-shaped block 545 through a spring block, the middle part of the upper end of the support seat 543 is slidably connected to a contact rod 544, and the lower part of the outer surface of the contact rod 544 is symmetrically fixedly connected to a cable 546 that is fixedly connected to the adjacent L-shaped block 545.

[0061] The extension of the electric telescopic rod 542 will drive the support seat 543 to rise until the contact rod 544 contacts the lower part of the support beam, thereby forcing the contact rod 544 to retract into the support seat 543. The contact rod 544 will pull the L-shaped block 545 inward through the cable 546, thereby clamping and fixing the support beam.

[0062] Further, to achieve the positioning of the left and right sides of the support beam, refer to Fig.10 The side positioning assembly 53 includes a sliding seat 531 slidably connected to the inner surface of the slide groove 52, the outer surface of the sliding seat 531 is fixedly connected to the outer surface of the steel cable 734, the upper end of the sliding seat 531 is fixedly connected to a mounting plate 532, the inner surface of the mounting plate 532 is slidably connected to a U-shaped block 533, the inner surface of the U-shaped block 533 is fixedly connected to a compression spring 534 at one end close to the mounting plate 532, and the end of the U-shaped block 533 close to the center drive assembly 61 is slidably connected to a plurality of spring ejector pins 535 distributed in an array.

[0063] While the center positioning component 54 clamps and fixes the support beam, the side wall of the support beam will compress the spring ejector pin 535 to retract it into the U-shaped block 533, and simultaneously compress the compression spring 1 534 through the U-shaped block 533. After the support beam is in place, the extended part of the spring ejector pin 535 will be used to position the support beam front and back, and the center positioning component 54 will cooperate to limit the support beam in the left, right, front and back directions to ensure stability.

[0064] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An industrial vehicle outer gantry welding device, comprising a base, a guide rail is provided at the upper end of the base, a welding mechanical arm is slidably connected to the inner surface of the guide rail, and a console is fixedly connected to the front end of the base, characterized in that: A main beam positioning structure is provided in the middle of the upper end of the base, a side positioning structure is provided on the upper end of the main beam positioning structure and on the left and right sides of the upper end of the base, and a front and rear positioning structure is provided on the front end of the main beam positioning structure and the rear of the upper end of the base; The main beam positioning structure includes a central driving assembly fixedly connected to the upper end of the base, and a plurality of positioning support assemblies are linearly distributed and fixedly connected to both ends of the central driving assembly. A guide groove for installing a side positioning structure is provided at the upper end of the central driving assembly; The front and rear positioning structure comprises a front limit assembly arranged at the front end of the central drive assembly, a rear limit assembly is slidably connected to the rear end of the upper end of the base, and a side drive assembly fixedly connected to the side positioning structure is fixedly connected to the rear end of the rear limit assembly; The rear limit assembly includes two slide grooves symmetrically opened at the rear of the upper end of the base, the inner surfaces of the two slide grooves are slidably connected to rollers, the upper ends of the two rollers are commonly fixedly connected to a support plate, the rear ends of the two slide grooves are fixedly connected to a spring top plate, and the rear end of the support plate is fixedly connected to the side drive assembly; The front limit assembly includes a slide groove three symmetrically opened at the front of the central drive assembly, two inner surfaces of the slide grooves three are symmetrically slidably connected with arc rods, the ends of the two arc rods close to each other are fixedly connected with compression springs three fixedly connected to the inner surface of the slide groove three, the sides of the two arc rods close to each other are fixedly connected with cables two, and the ends of the two cables two away from the arc rods pass through the front of the inner surface of the slide groove three and extend to the front end of the central drive assembly and are fixedly connected with pull rings; The side drive assembly includes two bearing brackets which are symmetrically distributed on the left and right and fixedly connected to the rear end of the support plate, the inner surfaces of the two bearing brackets are connected to the winding shaft for rotation together, one of the bearing brackets is fixedly connected to a driving motor which is transmission-connected to the winding shaft on a side away from the middle of the winding shaft, a second steel cable is wound around the outer surface of the driving motor, a first steel cable is symmetrically rotated on the outer surface of the driving motor, both ends of the first steel cable and the second steel cable are wound around the outer surface of the winding shaft and the winding directions of the two ends are opposite, and the one side of the first steel cable and the second steel cable away from the winding shaft are fixedly connected to the side positioning structure; The side positioning structure includes limit blocks that are symmetrically distributed on the left and right and fixedly connected to the upper end of the base. A slide groove is opened on the upper ends of the two limit blocks. The inner surfaces of the two slide grooves are slidably connected with side positioning components that are symmetrically distributed and fixedly connected to adjacent steel cables. The inner surface of the guide groove is slidably connected with a center positioning component that is fixedly connected to steel cable 2.

2. The industrial vehicle outer gantry welding equipment according to claim 1, characterized in that: The central driving assembly includes a central block fixedly connected to the upper end of the base, the front end of the central block is rotatably connected to a handle, the rear end of the handle is fixedly connected to a threaded rod, the outer surface of the threaded rod is threadedly connected to a driving rod, the outer surface of the driving rod is linearly distributed and fixedly connected to a plurality of sliding plates, the outer surface of the driving rod is slidably connected to a fixed plate fixedly connected to the inner surface of the central block at a position located in front of the sliding plate, and the left and right sides of the inner surface of the central block between the sliding plate and the fixed plate are provided with through holes connected to adjacent positioning support assemblies.

3. The industrial vehicle outer gantry welding equipment according to claim 2, characterized in that: The positioning support assembly includes a fixed seat fixedly connected to the center block, the inner surface of the fixed seat is slidably connected with a sliding rod, the inner surface of the sliding rod is slidably connected with a hydraulic ejector pin, the inner surface of the sliding rod is slidably connected with a center rod on one side away from the hydraulic ejector pin, the piston part of the center rod is fixedly connected to one end away from the hydraulic ejector pin with a compression spring 2 fixedly connected to the inner surface of the sliding rod, the end of the sliding rod away from the fixed seat is fixedly connected to a mounting seat, the end of the mounting seat away from the fixed seat is symmetrically slidably connected with an expansion slider through a spring block, the end of the center rod away from the hydraulic ejector pin is fixedly connected with a spring telescopic rod, the end of the spring telescopic rod away from the center rod is fixedly connected with a vertical support plate, the upper and lower ends of the center rod are fixedly connected to a horizontal support rod through a telescopic rod, and the two horizontal support rods are rotatably connected to the vertical support plate through a connecting rod on one side close to the vertical support plate.

4. The industrial vehicle outer gantry welding equipment according to claim 1, characterized in that: The center positioning assembly includes a sliding seat 2 that is slidably connected to the inner surface of the guide groove, the outer surface of the sliding seat 2 is fixedly connected to the outer surface of the steel cable 2, the upper end of the sliding seat 2 is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to a support seat, the inner surface of the support seat is symmetrically connected to an L-shaped block through a spring block, the middle part of the upper end of the support seat is slidably connected to a contact rod, and the lower part of the outer surface of the contact rod is symmetrically fixedly connected to a cable 1 that is fixedly connected to the adjacent L-shaped block.

5. The industrial vehicle outer gantry welding equipment according to claim 1, characterized in that: The side positioning assembly includes a sliding seat slidably connected to the inner surface of a slide groove, the outer surface of the sliding seat is fixedly connected to the outer surface of a steel cable, the upper end of the sliding seat is fixedly connected to a mounting plate, the inner surface of the mounting plate is slidably connected to a U-shaped block, the inner surface of the U-shaped block is fixedly connected to a compression spring at one end close to the mounting plate, and the end of the U-shaped block close to the center drive assembly is slidably connected to a plurality of spring ejectors distributed in an array.

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