Positioning device for ladder stand pipe welding

Abstract

The invention relates to the technical field of welding tools, and particularly discloses a ladder stand pipe welding positioning device which comprises a storage box and two wheel sets symmetrically arranged at the bottom of the storage box, each wheel set comprises a mounting base and a positioning wheel, and a driving motor for driving the positioning wheel to rotate is arranged on each mounting base; the periphery of the positioning wheel is provided with a positioning groove matched with a ladder stand vertical rod, a feeding assembly and a clamping assembly are arranged in the storage box, the feeding assembly is used for placing a ladder stand transverse rod in the storage box into the clamping assembly, and the storage box is provided with a first driving assembly for driving the clamping assembly to move in the vertical direction and a second driving assembly for driving the clamping assembly to rotate. And two polishing plates are symmetrically arranged on the front side and the rear side of the clamping assembly, are elastically connected with the storage box through elastic pieces, and incline towards each other from top to bottom. The positioning device for ladder stand pipe welding is small in size, flexible in use site and capable of being suitable for positioning ladder stands of different lengths.

Description

Technical Field

[0001] The invention relates to the technical field of welding tooling, and in particular to a positioning device for ladder pipe welding. Background Art

[0002] During construction or equipment maintenance, ladders are often used for climbing work. Ladders are usually composed of two vertical bars and multiple horizontal bars arranged between the two vertical bars. When producing ladders, the two ends of the horizontal bars need to be welded to the corresponding vertical bars to ensure the stability of the ladder.

[0003] The Chinese patent with the announcement number CN219837394U discloses a ladder welding positioning tool, including a support frame, a rotating frame is arranged between two parallel side walls of the support frame, and the two ends of the rotating frame in the length direction are respectively fixedly connected with positioning plates, and the side walls of the positioning plates away from each other are fixedly connected with a slewing shaft, and the slewing shaft is rotatably connected with the support frame, and the middle position of the rotating frame is fixedly connected with a crossbar positioning rod, and the crossbar positioning rod is provided with crossbar positioning grooves at equal intervals, and the two parallel side walls of the rotating frame are provided with vertical rod positioning grooves, and the two ends of the vertical rod positioning grooves are respectively fixedly connected with rubber holders, and the two parallel side walls of the rotating frame are provided with a plurality of groups of avoidance grooves. The patent positions the crossbar of the ladder through the crossbar positioning groove, and positions the vertical rod through the vertical rod positioning groove, and then welds the crossbar and the vertical rod.

[0004] However, in the actual implementation process of the above patent, the crossbars need to be manually placed into the crossbar positioning grooves one by one, which not only consumes labor but also affects work efficiency. In addition, due to the limited length of the support frame, the spacing between adjacent crossbar positioning grooves and the size of the crossbar positioning grooves are also fixed. When the specifications of the ladder to be produced change, new support frames and rotating frames need to be made to adapt to the specifications of the ladder, which undoubtedly increases production costs and causes waste of resources. In addition, the support frame occupies a large area, is inconvenient to move, and has limited usage scenarios.

[0005] Therefore, the art needs a positioning device for ladder pipe welding to solve the above problems. Summary of the invention

[0006] The present invention provides a positioning device for ladder pipe welding, aiming to solve the problems in the related art that the welding positioning device needs manual placement of cross bars, has low working efficiency, cannot adapt to the positioning of ladders of different specifications, and the device is large in size, inconvenient to move, and has limited usage scenarios.

[0007] A positioning device for welding a ladder pipe of the present invention comprises a material storage box and two wheel groups symmetrically arranged at the bottom of the material storage box, the wheel group is used to position the vertical rod of the ladder, the extension direction of the ladder vertical rod is defined as the left and right direction, the wheel group comprises a mounting seat and a plurality of positioning wheels spaced along the left and right directions, the positioning wheel is rotatably connected to the mounting seat, and a driving motor for driving the positioning wheel to rotate is arranged on the mounting seat, and a positioning groove adapted to the ladder vertical rod is opened on the outer periphery of the positioning wheel; A loading assembly and a clamping assembly are provided in the material storage box. The loading assembly is used to place the ladder crossbar in the material storage box into the clamping assembly. A driving assembly 1 for driving the clamping assembly to move vertically and a driving assembly 2 for driving the clamping assembly to rotate are provided on the material storage box. Two grinding plates are symmetrically arranged on the front and rear sides of the clamping assembly. The grinding plates are elastically connected to the storage box through elastic parts, and the two grinding plates are inclined from top to bottom towards each other. When the driving assembly one drives the clamping assembly to drive the ladder cross bar to move downward, the driving assembly two drives the clamping assembly to drive the ladder cross bar to rotate around the central axis of the cross bar, and the grinding plates grind the two ends of the ladder cross bar.

[0008] The present invention drives the positioning wheel to move on the vertical rod, so that the positioning wheel limits the distance between the two vertical rods, and drives the clamping assembly to lower the ladder cross bar through the driving assembly, which replaces manual placement and reduces labor consumption, and the ladder cross bar can be lowered at even intervals by controlling the stroke of the positioning wheel; in addition, the positioning device for welding ladder pipes of the present invention is not only small in size and flexible in use, but also can be used for positioning ladders of different lengths, and has high flexibility and applicability; grinding the burrs on the ends of the ladder cross bars is beneficial to the subsequent welding between the cross bars and the vertical rods, and chamfers are formed on the edges at both ends of the ladder cross bars, which is beneficial for the clamping assembly to smoothly place the ladder cross bar between the two ladder vertical rods.

[0009] Preferably, the clamping assembly includes arc plate one and arc plate two, which are buckled together to form a circular ring for clamping the ladder crossbar, and the driving assembly one is provided with a driving assembly three for driving the arc plate one and arc plate two to open and close.

[0010] By arranging the clamping assembly in a circular ring shape in the buckled state, it is advantageous for the clamping assembly and the ladder crossbar to remain coaxial, thereby improving the stability when the clamping assembly drives the ladder crossbar to rotate.

[0011] Preferably, driving component three includes motor three, an upper arc plate rotatably connected to arc plate one, and a lower arc plate rotatably connected to arc plate two, the upper arc plate and the lower arc plate are vertically slidably connected to driving component one, motor three is fixedly connected to driving component one, and the output end of motor three is fixedly connected to gear three, the front and rear sides of gear three are respectively meshed with rack one and rack two, rack one is fixedly connected to the upper arc plate, rack two is fixedly connected to the lower arc plate, motor three drives gear three to rotate, and gear three drives the upper arc plate and the lower arc plate to open and close through rack one and rack two.

[0012] Preferably, drive assembly 1 includes motor 1 and a mounting rod, motor 1 is fixedly mounted on a material storage box, the mounting rod is vertically slidably connected to the material storage box, the output end of motor 1 is fixedly connected to gear 1, the mounting rod is provided with a tooth segment meshing with gear 1, motor 1 drives gear 1 to rotate, gear 1 drives the mounting rod to move up and down through the tooth segment, motor 3 is fixedly connected to the mounting rod, and the upper arc plate and the lower arc plate are slidably connected to the mounting rod.

[0013] Preferably, driving component 2 includes motor 2 and gear 2, motor 2 is fixedly mounted on the upper arc plate, gear 2 is fixedly connected to the output end of motor 2, arc plate 1 and arc plate 2 are respectively provided with arc rack 1, gear 2 is meshed with arc rack 1, when arc plate 1 and arc plate 2 are engaged, motor 2 drives gear 2 to rotate, and gear 2 drives arc plate 1 and arc plate 2 to rotate through arc rack 1.

[0014] Preferably, arc plate one is rotatably connected to arc plate three, arc plate two is rotatably connected to arc plate four, a welding gun mounting bracket is arranged on arc plate three, motor four is fixedly mounted on arc plate two, the output end of motor four is fixedly connected to gear four, arc plate three and arc plate four are respectively provided with arc rack two, gear four is meshed with arc rack two, when arc plate one and arc plate two are engaged, arc plate three and arc plate four are also in an engaged state, when motor four drives gear four to rotate, gear four drives arc plate three and arc plate four to rotate through arc rack two.

[0015] By arranging a welding gun mounting frame, after the welding gun is mounted on the welding gun mounting frame, the welding gun mounting frame is driven to rotate, so as to realize automatic ring welding between the horizontal rod and the vertical rod by the welding gun.

[0016] Preferably, arc-shaped clamping plates are respectively provided on the sides of the arc-shaped plate 1 and the arc-shaped plate 2 facing each other, and the arc-shaped clamping plates are threadedly connected to the arc-shaped plate 1 and the arc-shaped plate 2 through studs.

[0017] The distance between the arc clamping plate and the arc plate 1 and the arc plate 2 is changed by screwing the stud. When the arc plate 1 and the arc plate 2 are buckled together, the two arc clamping plates clamp the ladder crossbar, so that the clamping assembly can adapt to ladder crossbars of different pipe diameters.

[0018] Preferably, the mounting seat is slidably connected to the storage box along the front-rear direction, and a driving component four is provided on the storage box for driving the two mounting seats to move synchronously in the direction away from each other or towards each other.

[0019] The distance between the positioning wheels on the two mounting seats is adjusted according to the specifications of the welded ladder, so that the present invention can be applicable to the positioning and welding of ladders of different specifications, thereby improving the applicability of the present invention.

[0020] Preferably, the top of the grinding plate is fixedly connected to a vertically arranged extrusion plate, and the two extrusion plates are respectively provided with inclined wedge surfaces on one side close to the loading assembly. When the loading assembly places the ladder cross bar into the clamping assembly, the two ends of the ladder cross bar enter between the two extrusion plates by squeezing the inclined wedge surfaces.

[0021] Preferably, a slope surface is provided in the material storage box, and a material unloading gap for the ladder cross bar to pass through is formed between the slope surface and the material storage box, and an inclined plate is provided below the material unloading gap in the material storage box, and the loading assembly includes a mounting shaft rotatably connected to the material storage box and four material-discharging plates uniformly distributed along the circumferential direction of the mounting shaft, a baffle plate extends from the end of the material-discharging plate, and the material-discharging plate and the baffle plate form an L-shaped structure, and a driving assembly five for driving the mounting shaft to rotate is provided in the material storage box, and an avoidance groove for the material-discharging plate to pass through is provided at one end of the inclined plate close to the mounting shaft.

[0022] The beneficial effects of the present invention are as follows: (1) the present invention drives the positioning wheel to move on the vertical rod, so that the positioning wheel limits the distance between the two vertical rods, and drives the clamping assembly to lower the ladder crossbar by the driving assembly, thereby replacing manual placement and reducing labor consumption. Moreover, by controlling the travel of the positioning wheel, the ladder crossbar can be lowered at even intervals; (2) The positioning device for ladder pipe welding of the present invention is not only small in size and flexible in use, but also can be used to position ladders of different lengths, and has high flexibility and applicability; (3) The present invention grinds away the burrs on the ends of the ladder crossbars by means of a grinding plate, which is beneficial to the subsequent welding between the crossbars and the vertical bars. Moreover, since the grinding plate is arranged at an angle, chamfers are formed on the edges at both ends of the ladder crossbars during the grinding process, which is beneficial for the clamping assembly to smoothly place the ladder crossbar between the two ladder vertical bars. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a schematic diagram of a positioning device for ladder pipe welding in use.

[0024] Figure 2 It is a cross-sectional view of a positioning device for ladder pipe welding of the present invention at a first viewing angle.

[0025] Figure 3 It is a cross-sectional view of a positioning device for ladder pipe welding of the present invention at a second viewing angle.

[0026] Figure 4 The present invention is a schematic structural diagram of a feeding assembly of a positioning device for ladder pipe welding.

[0027] Figure 5 The present invention is a schematic structural diagram of a driving component 1 of a positioning device for ladder pipe welding.

[0028] Figure 6 It is a schematic diagram of a clamping assembly of a positioning device for ladder pipe welding of the present invention from a first viewing angle.

[0029] Figure 7 It is a schematic diagram of a clamping assembly of a positioning device for ladder pipe welding of the present invention from a second viewing angle.

[0030] Figure 8 It is a schematic diagram of the partial structure of a clamping assembly of a positioning device for ladder pipe welding of the present invention.

[0031] Fig. 9 The present invention is a schematic structural diagram of an extrusion plate and a grinding plate of a positioning device for ladder pipe welding.

[0032] Reference numerals: 1. Storage box; 11. Discharge port; 12. Slope surface; 13. Inclined plate; 14. Avoidance groove; 15. Motor 1; 16. Mounting rod; 17. Gear 1; 2. Vertical rod; 3. Crossbar; 4. Mounting seat; 41. Positioning wheel; 42. Positioning groove; 5. Grinding plate; 51. Elastic member; 52. Extrusion plate; 53. Wedge surface; 6. Mounting shaft; 61. Dispensing plate; 62. Baffle; 63. Gear 5; 64. Gear 6; 65. Driving rod; 66. Transmission rod ; 67, spring; 68, push rod; 71, arc plate one; 72, arc plate two; 73, arc clamping plate; 74, stud; 75, arc rack one; 8, motor three; 81, upper arc plate; 82, lower arc plate; 83, gear three; 84, rack one; 85, rack two; 86, motor two; 87, gear two; 91, arc plate three; 92, arc plate four; 93, welding gun mounting bracket; 94, motor four; 95, gear four; 96, arc rack two. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figures 1 to 9As shown, a positioning device for welding a ladder pipe of the present invention comprises a material storage box 1 and two wheel groups symmetrically arranged at the bottom of the material storage box 1, the wheel group is used to position the vertical rod 2 of the ladder, and the extension direction of the ladder vertical rod 2 is defined as the left and right direction. The wheel group comprises a mounting seat 4 and three positioning wheels 41 arranged at intervals along the left and right directions, the positioning wheel 41 is rotatably connected to the mounting seat 4, and a driving motor (not shown in the figure) for driving the positioning wheel 41 to rotate is arranged on the mounting seat 4. A positioning groove 42 adapted to the ladder vertical rod 2 is provided on the outer periphery of the positioning wheel 41.

[0035] When positioning the ladder vertical rod 2, the ladder vertical rod 2 is aligned with the positioning groove 42 on the corresponding positioning wheel 41 and placed into the positioning groove 42. The positioning wheels 41 of the two wheel sets limit the positions of the two ladder vertical rods 2 through the positioning groove 42, thereby realizing the positioning of the two ladder vertical rods 2.

[0036] A loading assembly and a clamping assembly are provided in the storage box 1. The loading assembly is used to place the ladder crossbar 3 in the storage box 1 into the clamping assembly. The storage box 1 is provided with a driving assembly 1 for driving the clamping assembly to move vertically and a driving assembly 2 for driving the clamping assembly to rotate.

[0037] Two grinding plates 5 are symmetrically arranged on the front and rear sides of the clamping assembly. The grinding plates 5 are elastically connected to the storage box 1 through an elastic member 51, and the two grinding plates 5 are tilted from top to bottom in a direction close to each other. When the loading assembly puts the ladder crossbar 3 into the clamping assembly, and the clamping assembly drives the ladder crossbar 3 to move downward, the two ends of the ladder crossbar 3 are respectively in contact with the corresponding grinding plates 5, and the clamping assembly is driven by the driving assembly 2 to drive the ladder crossbar 3 to rotate around the central axis of the crossbar 3, and the grinding plates 5 grind the two ends of the ladder crossbar 3. On the one hand, grinding the burrs at the ends of the ladder crossbar 3 is conducive to the subsequent welding between the crossbar 3 and the vertical rod 2. On the other hand, since the grinding plates 5 are tilted, chamfers will be formed at the edges of the two ends of the ladder crossbar 3 during the grinding process of the grinding plates 5, which is conducive to the clamping assembly to smoothly put the ladder crossbar 3 between the two ladder vertical rods 2.

[0038] The present invention drives the positioning wheel 41 to move on the vertical rod 2, so that the positioning wheel 41 limits the distance between the two vertical rods 2, and drives the clamping assembly to lower the ladder cross bar 3 through the driving component, which replaces manual placement and reduces labor consumption. Moreover, by controlling the stroke of the positioning wheel 41, the ladder cross bar 3 can be lowered at even intervals. In addition, the positioning device for ladder pipe welding of the present invention is not only small in size and flexible in use, but also can be used for positioning ladders of different lengths, and has high flexibility and applicability.

[0039] like Figures 1 to 4As shown, a discharge port 11 is provided at the top of the material storage box 1, and a slope surface 12 is provided below the discharge port 11. A material discharge gap is formed between the slope surface 12 and the material storage box 1 for the ladder crossbar 3 to pass through. An inclined plate 13 is provided below the material discharge gap of the material storage box 1, and the inclined plate 13 is tilted downward from one end away from the feeding assembly to one end close to the feeding assembly. The feeding assembly includes a mounting shaft 6 rotatably connected to the material storage box 1 and four material-dispensing plates 61 uniformly distributed along the circumferential interval of the mounting shaft 6, and a baffle 62 is extended from the end of the material-dispensing plate 61, and the material-dispensing plate 61 and the baffle 62 form an L-shaped structure.

[0040] A driving component 5 for driving the mounting shaft 6 to rotate is arranged in the material storage box 1. An avoidance groove 14 for the passing of the material shifting plate 61 is opened at one end of the inclined plate 13 close to the mounting shaft 6. The ladder cross bar 3 rolls along the inclined plate 13 toward the upper material component. During the process of the material shifting plate 61 rotating upward from the bottom of the avoidance groove 14, the ladder cross bar 3 is picked up and driven to rotate toward the clamping component. After the ladder cross bar 3 is aligned with the clamping component, the ladder cross bar 3 rolls from the material shifting plate 61 into the clamping component, thereby realizing automatic loading of the ladder cross bar 3.

[0041] The driving assembly 5 includes a gear 5 63, a gear 6 64, a driving rod 65 and a transmission rod 66. The gear 5 63 is connected to the mounting shaft 6 through a one-way bearing, the gear 6 64 is rotatably connected to the storage box 1, the transmission rod 66 is arranged between the gear 5 63 and the gear 6 64, and is vertically slidably connected to the storage box 1. The transmission rod 66 is provided with a tooth segment meshing with the gear 5 63 on the side facing the gear 5 63, and the transmission rod 66 is provided with a tooth segment meshing with the gear 6 64 on the side facing the gear 6 64. The driving rod 65 is vertically slidably matched with the storage box 1, and is elastically connected to the storage box 1 through a spring 67. The driving rod 65 is provided with a tooth segment meshing with the gear 6 64, and the driving rod 65 is fixedly connected with a push rod 68.

[0042] When the clamping assembly moves upward, it will contact the push rod 68 and push the push rod 68 upward, and the push rod 68 drives the driving rod 65 to move upward, and the tooth segment on the driving rod 65 drives the gear 64 to rotate, and the gear 64 drives the gear 5 63 to rotate through the transmission rod 66, and the gear 5 63 drives the installation shaft 6 to rotate through the one-way bearing, and the installation shaft 6 drives the material-diverting plate 61 to rotate, so that the material-diverting plate 61 can deliver the ladder crossbar 3 to the clamping assembly. When the clamping assembly moves downward, the push of the push rod 68 will be cancelled, and the driving rod 65 will be reset under the elastic force of the spring 67. Since the gear 5 63 is connected to the installation shaft 6 through the one-way bearing, when the driving gear 5 63 rotates in the opposite direction during the reset process of the driving rod 65, the gear 5 63 will not drive the installation shaft 6 to rotate, thereby driving the installation shaft 6 to rotate in one direction and loading.

[0043] like Figures 6 to 8As shown, in order to improve the stability of the clamping assembly clamping the ladder crossbar 3, two clamping assemblies are symmetrically arranged in the front and rear of this embodiment. The clamping assembly includes an arc plate 1 71 and an arc plate 2 72, and the arc plate 1 71 and the arc plate 2 72 are buckled to form a ring for clamping the ladder crossbar 3. In order to adapt to the ladder crossbar 3 of different pipe diameters, in this embodiment, the arc plate 1 71 and the arc plate 2 72 are respectively provided with an arc clamping plate 73 on one side facing each other, and the arc clamping plate 73 is threadedly connected with the arc plate 1 71 and the arc plate 2 72 through a stud 74. The distance between the arc clamping plate 73 and the arc plate 1 71 and the arc plate 2 72 is changed by screwing the stud 74. When the arc plate 1 71 and the arc plate 2 72 are buckled, the two arc clamping plates 73 clamp the ladder crossbar 3.

[0044] like Figure 1 and Figure 5 As shown, the driving assembly 1 is provided with a driving assembly 3 for driving the arc plate 1 71 and the arc plate 2 72 to open and close. The driving assembly 1 includes a motor 15 and a mounting rod 16. The motor 15 is fixedly installed on the material storage box 1. The mounting rod 16 is vertically connected to the material storage box 1 for sliding. The output end of the motor 15 is fixedly connected with a gear 17. The mounting rod 16 is provided with a tooth segment meshing with the gear 17. The motor 15 drives the gear 17 to rotate. The gear 17 drives the mounting rod 16 to move up and down through the tooth segment. After the mounting rod 16 puts the clamping assembly into place, the motor 15 stops driving.

[0045] like Figures 5 to 8 As shown, the driving assembly 3 includes a motor 3 8, an upper arc plate 81 rotatably connected to the arc plate 1 71, and a lower arc plate 82 rotatably connected to the arc plate 2 72. The upper arc plate 81 and the lower arc plate 82 are slidably connected to the mounting rod 16 in the vertical direction, the motor 3 8 is fixedly connected to the mounting rod 16, and the output end of the motor 3 8 is fixedly connected to a gear 3 83, and the front and rear sides of the gear 3 83 are respectively meshed with a rack 1 84 and a rack 2 85, the rack 1 84 is fixedly connected to the upper arc plate 81, and the rack 2 85 is fixedly connected to the lower arc plate 82. The motor 3 8 drives the gear 3 83 to rotate, and the gear 3 83 drives the upper arc plate 81 and the lower arc plate 82 to open and close through the rack 1 84 and the rack 2 85, and the upper arc plate 81 and the lower arc plate 82 drive the arc plate 1 71 and the arc plate 2 72 to open and close.

[0046] The driving assembly 2 includes a motor 2 86 and a gear 2 87. The motor 2 86 is fixedly mounted on the upper arc plate 81, and the gear 2 87 is fixedly connected to the output end of the motor 2 86. The arc plate 1 71 and the arc plate 2 72 are respectively fixedly connected with an arc rack 1 75. When the arc plate 1 71 and the arc plate 2 72 are buckled, the arc rack 1 75 on the arc plate 1 71 and the arc plate 2 72 are also buckled to form a ring. The gear 2 87 is meshed with the arc rack 1 75, and the motor 2 86 drives the gear 2 87 to rotate. The gear 2 87 drives the arc plate 1 71 and the arc plate 2 72 to rotate relative to the upper arc plate 81 and the lower arc plate 82 through the arc rack 1 75, thereby driving the ladder crossbar 3 to rotate.

[0047] The arc plate 1 71 is rotatably connected to the arc plate 3 91, and the arc plate 2 72 is rotatably connected to the arc plate 4 92. The arc plate 3 91 is provided with a welding gun mounting frame 93, and the arc plate 2 72 is fixedly installed with a motor 4 94, and the output end of the motor 4 94 is fixedly connected with a gear 4 95. The arc plate 3 91 and the arc plate 4 92 are respectively fixedly connected with an arc rack 2 96, and the gear 4 95 meshes with the arc rack 2 96. When the arc plate 1 71 and the arc plate 2 72 are buckled, the arc plate 3 91 and the arc plate 4 92 are also in a buckled state, and the arc racks 2 96 on the arc plate 3 91 and the arc plate 4 92 are also in a buckled state.

[0048] The welding gun is mounted on the welding gun mounting frame 93, and an electric push rod (not shown in the figure) for driving the welding gun is also mounted on the welding gun mounting frame 93. After the clamping assembly lowers the ladder crossbar 3 between the two vertical bars 2, the electric push rod is controlled to push the welding gun to the abutment between the crossbar 3 and the vertical bar 2, and the motor 4 94 is controlled to drive the gear 4 95 to rotate. The gear 4 95 drives the arc plate 3 91 and the arc plate 4 92 to rotate relative to the arc plate 1 71 and the arc plate 2 72 through the arc rack 2 96, thereby driving the welding gun mounting frame 93 to rotate, and the welding gun mounting frame 93 drives the welding gun to rotate, and the ladder crossbar 3 and the vertical bar 2 are welded. After the welding of the crossbar 3 is completed, the electric push rod is controlled to pull the welding gun back, and the arc plate 1 71 and the arc plate 2 72 are controlled to open up and down, and the clamping of the ladder crossbar 3 is cancelled. Then, the positioning wheel 41 on the storage box 1 is controlled to continue to move, and the next crossbar 3 is placed and welded. It is understandable that in other embodiments, manual welding may also be performed.

[0049] like Figure 3As shown, the mounting seat 4 is slidably connected to the storage box 1 in the front-to-back direction, and the storage box 1 is provided with a driving assembly 4 that drives the two mounting seats 4 to move synchronously in the direction away from or close to each other. The driving assembly 4 includes a double-headed cylinder (not shown in the figure) fixedly mounted on the bottom of the storage box 1, and the two driving ends of the double-headed cylinder are respectively fixedly connected to the mounting seats 4 of the corresponding wheel sets. The distance between the positioning wheels 41 on the two mounting seats 4 is adjusted according to the specifications of the welded ladder, so that the present invention can be applied to the positioning and welding of ladders of different specifications.

[0050] like Figure 1 and Fig. 9 As shown, the top of the grinding plate 5 is fixedly connected to a vertically arranged extrusion plate 52, and the two extrusion plates 52 are respectively provided with inclined wedge surfaces 53 on one side close to the loading assembly. When the loading assembly places the ladder cross bar 3 into the clamping assembly, the two ends of the ladder cross bar 3 enter between the two extrusion plates 52 by squeezing the inclined wedge surfaces 53, thereby realizing the centering positioning of the ladder cross bar 3.

[0051] The specific working principle of the positioning device for ladder pipe welding of the present invention is as follows: align the ladder vertical rod 2 with the positioning groove 42 on the corresponding positioning wheel 41 and put it into the positioning groove 42, and the positioning wheels 41 of the two wheel sets restrict the positions of the two ladder vertical rods 2 through the positioning groove 42; Put the ladder crossbar 3 into the storage box 1, and the ladder crossbar 3 rolls down the slope surface 12 below the discharge port 11 onto the inclined plate 13, and rolls along the inclined plate 13 into the space formed by the two material-discharging plates 61; The control motor 15 drives the gear 17 to rotate, so that the gear 17 drives the installation rod 16 to move upward through the tooth segment, and the installation rod 16 drives the clamping assembly to move upward. When the arc plate 71 moves to contact the push rod 68, the push rod 68 is pushed upward, and the push rod 68 drives the driving rod 65 to move upward. The tooth segment on the driving rod 65 drives the gear 6 64 to rotate, and the gear 6 64 drives the gear 5 63 to rotate through the transmission rod 66. The gear 5 63 drives the installation shaft 6 to rotate through the one-way bearing, and the installation shaft 6 drives the material-diverting plate 61 to rotate. The material-diverting plate 61 rotates upward from the avoidance groove 14 on the inclined plate 13, and picks up the ladder crossbar 3 to continue to rotate. At this time, the arc plate 7 1 and the arc plate 2 72 are in the state of being opened up and down, and a space for the ladder cross bar 3 to enter is formed between the arc plate 1 71 and the arc plate 2 72 and between the upper and lower arc clamping plates 73. When the material-diverting plate 61 drives the ladder cross bar 3 to continue to rotate until the material-diverting plate 61 located below the ladder cross bar 3 is in a state of being tilted downward at the end, the ladder cross bar 3 rolls between the arc plate 1 71 and the arc plate 2 72 under the action of its own gravity, and the baffle plate 62 above the ladder cross bar 3 pushes the ladder cross bar 3 during the process of continuing to rotate, so that the ladder cross bar 3 squeezes the inclined wedge surface 53 to enter between the two squeezing plates 52, and finally falls between the upper and lower arc clamping plates 73; The control motor 3 8 drives the gear 3 83 to rotate, and the gear 3 83 drives the upper arc plate 81 and the lower arc plate 82 to buckle through the rack 1 84 and the rack 2 85, and the upper arc plate 81 and the lower arc plate 82 drive the arc plate 1 71 and the arc plate 2 72 to buckle, and the upper and lower arc clamping plates 73 clamp the ladder crossbar 3; The control motor 15 drives the gear 17 to rotate, so that the gear 17 drives the installation rod 16 to move downward through the tooth segment, and the installation rod 16 drives the clamping assembly and the ladder crossbar 3 to move downward. During the downward movement, the control motor 2 86 drives the gear 2 87 to rotate, and the gear 2 87 drives the arc plate 1 71 and the arc plate 2 72 to rotate relative to the upper arc plate 81 and the lower arc plate 82 through the arc rack 1 75. The arc plate 1 71 and the arc plate 2 72 drive the ladder crossbar 3 to rotate through the arc clamping plate 73. The ladder crossbar 3 rotates and moves downward at the same time, and the grinding plate 5 grinds the two ends of the ladder crossbar 3; After the mounting rod 16 drives the clamping assembly and the ladder crossbar 3 to move between the two vertical rods 2, the electric push rod is controlled to push the welding gun to the abutment between the crossbar 3 and the vertical rod 2, and the motor 4 94 is controlled to drive the gear 4 95 to rotate. The gear 4 95 drives the arc plate 3 91 and the arc plate 4 92 to rotate relative to the arc plate 1 71 and the arc plate 2 72 through the arc rack 2 96. The arc plate 3 91 and the arc plate 4 92 drive the welding gun mounting frame 93 to rotate, and the welding gun mounting frame 93 drives the welding gun to rotate, so as to weld the ladder crossbar 3 and the vertical rod 2; After completing the welding of the cross bar 3, control the electric push rod to pull back the welding gun, and control the motor three 8 to drive the gear three 83 to rotate, and the gear three 83 drives the upper arc plate 81 and the lower arc plate 82 to open up and down through the rack one 84 and the rack two 85, and the upper arc plate 81 and the lower arc plate 82 drive the arc plate one 71 and the arc plate two 72 to open up and down, and the arc plate one 71 and the arc plate two 72 drive the arc plate three 91 and the arc plate four 92 to open up and down, and cancel the clamping of the ladder cross bar 3, and then control the positioning wheel 41 on the storage box 1 to continue moving, and place and weld the next ladder cross bar 3.

[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A positioning device for ladder pipe welding, comprising a material storage box and two wheel sets symmetrically arranged at the bottom of the material storage box, characterized in that: The wheel set is used to position the vertical rod of the ladder, and the extension direction of the ladder vertical rod is defined as the left-right direction. The wheel set includes a mounting seat and a plurality of positioning wheels arranged at intervals along the left-right direction. The positioning wheel is rotatably connected to the mounting seat, and a driving motor for driving the positioning wheel to rotate is arranged on the mounting seat. The outer periphery of the positioning wheel is provided with a positioning groove adapted to the ladder vertical rod; A loading assembly and a clamping assembly are provided in the material storage box. The loading assembly is used to place the ladder crossbar in the material storage box into the clamping assembly. A driving assembly 1 for driving the clamping assembly to move vertically and a driving assembly 2 for driving the clamping assembly to rotate are provided on the material storage box. Two grinding plates are symmetrically arranged on the front and rear sides of the clamping assembly. The grinding plates are elastically connected to the storage box through elastic parts, and the two grinding plates are inclined from top to bottom towards each other. When the driving assembly one drives the clamping assembly to drive the ladder cross bar to move downward, the driving assembly two drives the clamping assembly to drive the ladder cross bar to rotate around the central axis of the cross bar, and the grinding plates grind the two ends of the ladder cross bar.

2. The positioning device for ladder pipe welding according to claim 1, characterized in that: The clamping assembly includes an arc plate 1 and an arc plate 2, which are buckled together to form a ring for clamping the ladder crossbar. The driving assembly 1 is provided with a driving assembly 3 for driving the arc plate 1 and the arc plate 2 to open and close.

3. The positioning device for ladder pipe welding according to claim 2, characterized in that: Driving component three includes motor three, an upper arc plate rotatably connected to arc plate one, and a lower arc plate rotatably connected to arc plate two, the upper arc plate and the lower arc plate are vertically slidably connected to driving component one, motor three is fixedly connected to driving component one, and the output end of motor three is fixedly connected to gear three, the front and rear sides of gear three are respectively meshed with rack one and rack two, rack one is fixedly connected to the upper arc plate, rack two is fixedly connected to the lower arc plate, motor three drives gear three to rotate, and gear three drives the upper arc plate and the lower arc plate to open and close through rack one and rack two.

4. The positioning device for ladder pipe welding according to claim 3, characterized in that: Driving component 1 includes motor 1 and mounting rod. Motor 1 is fixedly installed on the storage box. The mounting rod is slidably connected to the storage box along the vertical direction. The output end of motor 1 is fixedly connected to gear 1. The mounting rod is provided with a tooth segment meshing with gear 1. Motor 1 drives gear 1 to rotate. Gear 1 drives the mounting rod to move up and down through the tooth segment. Motor 3 is fixedly connected to the mounting rod. The upper arc plate and the lower arc plate are slidably connected to the mounting rod.

5. The positioning device for ladder pipe welding according to claim 3, characterized in that: Driving component 2 includes motor 2 and gear 2. Motor 2 is fixedly mounted on the upper arc plate. Gear 2 is fixedly connected to the output end of motor 2. Arc plate 1 and arc plate 2 are respectively provided with arc rack 1. Gear 2 is meshed with arc rack 1. When arc plate 1 and arc plate 2 are engaged, motor 2 drives gear 2 to rotate, and gear 2 drives arc plate 1 and arc plate 2 to rotate through arc rack 1.

6. The positioning device for ladder pipe welding according to claim 3, characterized in that: Arc plate one is rotatably connected to arc plate three, arc plate two is rotatably connected to arc plate four, a welding gun mounting bracket is arranged on arc plate three, motor four is fixedly mounted on arc plate two, output end of motor four is fixedly connected to gear four, arc plate three and arc plate four are respectively provided with arc rack two, gear four is meshed with arc rack two, when arc plate one and arc plate two are engaged, arc plate three and arc plate four are also in an engaged state, when motor four drives gear four to rotate, gear four drives arc plate three and arc plate four to rotate through arc rack two.

7. The positioning device for ladder pipe welding according to claim 3, characterized in that: Arc-shaped plates are respectively arranged on one side of the arc-shaped plate 1 and the arc-shaped plate 2 facing each other, and the arc-shaped plates are threadedly connected with the arc-shaped plate 1 and the arc-shaped plate 2 through studs.

8. The positioning device for ladder pipe welding according to claim 1, characterized in that: The mounting seat is slidably connected to the material storage box along the front-rear direction, and a driving component four is arranged on the material storage box to drive the two mounting seats to move synchronously in the direction away from each other or close to each other.

9. The positioning device for ladder pipe welding according to claim 1, characterized in that: A vertically arranged extrusion plate is fixedly connected to the top of the grinding plate. The two extrusion plates are respectively provided with inclined wedge surfaces on one side close to the feeding assembly. When the feeding assembly places the ladder cross bar into the clamping assembly, the two ends of the ladder cross bar enter between the two extrusion plates by squeezing the inclined wedge surfaces.

10. The positioning device for ladder pipe welding according to claim 1, characterized in that: A slope surface is provided in the material storage box, and a material unloading gap for the ladder cross bar to pass through is formed between the slope surface and the material storage box. An inclined plate is provided below the material unloading gap in the material storage box. The loading assembly includes a mounting shaft rotatably connected to the material storage box and four material-discharging plates uniformly distributed along the circumferential direction of the mounting shaft. A baffle plate extends from the end of the material-discharging plate, and the material-discharging plate and the baffle plate form an L-shaped structure. A driving assembly five for driving the mounting shaft to rotate is provided in the material storage box, and an avoidance groove for the material-discharging plate to pass through is provided at one end of the inclined plate close to the mounting shaft.

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