A positioning device for welding a ladder pipe

Abstract

The present invention relates to the technical field of welding tooling, and specifically discloses a positioning device for welding ladder pipes, which includes a storage bin and two wheel sets symmetrically arranged at the bottom of the storage bin. Each wheel set includes a mounting seat and a positioning wheel. A driving motor for driving the positioning wheel to rotate is provided on the mounting seat. A positioning groove adapted to the vertical rod of the ladder is formed on the outer circumference of the positioning wheel. A feeding assembly and a clamping assembly are provided in the storage bin. The feeding assembly is used to place the horizontal bar of the ladder in the storage bin into the clamping assembly. A first driving assembly for driving the clamping assembly to move vertically and a second driving assembly for driving the clamping assembly to rotate are provided on the storage bin. 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 bin through elastic members, and the two grinding plates are inclined downward and toward each other. The positioning device for welding ladder pipes of the present invention is small in volume and flexible in use site, and can be used for positioning ladders of different lengths.

Description

Technical Field

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

[0002] During the construction of a building or the maintenance of equipment, ladders are usually used for working at heights. A ladder generally consists of two vertical rods and a plurality of cross rods arranged between the two vertical rods. When manufacturing a ladder, it is necessary to weld the two ends of the cross rod to the corresponding vertical rod to ensure the stability of the ladder.

[0003] Chinese Patent with Publication No. CN219837394U discloses a positioning tooling for ladder welding, including a support frame. A rotating frame is arranged between two parallel side walls of the support frame. Positioning plates are fixedly connected to the two ends of the rotating frame in the length direction. Return shafts are fixedly connected to the side walls of the positioning plates away from each other, and the return shafts are rotatably connected to the support frame. A cross rod positioning rod is fixedly connected to the middle position of the rotating frame. Cross rod positioning grooves are equidistantly arranged on the cross rod positioning rod. Vertical rod positioning grooves are arranged on two parallel side walls of the rotating frame. Rubber clamping seats are fixedly connected to the two ends of the vertical rod positioning grooves. A number of clearance grooves are arranged on two parallel side walls of the rotating frame. This patent positions the cross rod of the ladder through the cross rod positioning groove, positions the vertical rod through the vertical rod positioning groove, and then welds the cross rod and the vertical rod.

[0004] However, in the actual implementation of the above patent, it is necessary to manually place the cross rods into the cross rod 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 distance between adjacent cross rod positioning grooves and the size of the cross rod positioning grooves are fixed. When the specifications of the ladders to be produced change, new support frames and rotating frames need to be manufactured to adapt to the ladder specifications, which undoubtedly increases production costs, causes waste of resources, and the support frame occupies a large area, is inconvenient to move, and has limitations in the use scenario.

[0005] Therefore, there is a need in the art for a positioning device for welding a ladder pipe to solve the above problems. Summary of the Invention

[0006] The present invention provides a positioning device for welding a ladder pipe, aiming to solve the problems in the related art that the welding positioning device requires manual placement of cross rods, has a slow work efficiency, and cannot adapt to the positioning of ladders of different specifications, as well as the problems that the device has a large volume, is inconvenient to move, and has limitations in the use scenario.

[0007] A positioning device for welding a ladder tube of the present invention includes a storage bin and two wheel sets symmetrically arranged at the bottom of the storage bin. The wheel sets are used to position the vertical rods of the ladder. Define the extending direction of the vertical rod of the ladder as the left-right direction. Each wheel set includes a mounting seat and a plurality of positioning wheels arranged at intervals in the left-right direction. The positioning wheels are rotatably connected to the mounting seat, and a driving motor for driving the positioning wheels to rotate is arranged on the mounting seat. A positioning groove adapted to the vertical rod of the ladder is formed on the outer periphery of the positioning wheel.

[0008] A feeding component and a clamping component are arranged in the storage bin. The feeding component is used to place the cross bar of the ladder in the storage bin into the clamping component. A first driving component for driving the clamping component to move vertically and a second driving component for driving the clamping component to rotate are arranged on the storage bin.

[0009] Two grinding plates are symmetrically arranged on the front and rear sides of the clamping component. The grinding plates are elastically connected to the storage bin through elastic members, and the two grinding plates are inclined downward towards each other. During the process that the first driving component drives the clamping component to drive the cross bar of the ladder to move downward, the second driving component drives the clamping component to drive the cross bar of the ladder to rotate around the central axis of the cross bar, and the grinding plates grind the two ends of the cross bar of the ladder.

[0010] In the present invention, by driving the positioning wheels to walk on the vertical rod, the distance between the two vertical rods is restricted by the positioning wheels. By driving the first driving component to drive the clamping component to lower the cross bar of the ladder, manual placement is replaced, reducing labor consumption. Moreover, by controlling the stroke of the positioning wheels, the cross bars of the ladder can be evenly placed at intervals. In addition, the positioning device for welding the ladder tube of the present invention not only has a small volume and flexible use sites, but also can be applicable to the positioning of ladders of different lengths, with high flexibility and applicability. By grinding the burrs at the ends of the cross bars of the ladder, it is beneficial to the subsequent welding between the cross bar and the vertical rod, and chamfers will be formed at the edges of the two ends of the cross bar of the ladder, which is beneficial to the clamping component to smoothly place the cross bar of the ladder between the two vertical rods of the ladder.

[0011] Preferably, the clamping component includes a first arc-shaped plate and a second arc-shaped plate. The first arc-shaped plate and the second arc-shaped plate are buckled to form a ring for clamping the cross bar of the ladder. A third driving component for driving the first arc-shaped plate and the second arc-shaped plate to open and close is arranged on the first driving component.

[0012] By setting the clamping component in a circular ring shape in the buckled state, it is beneficial for the clamping component and the cross bar of the ladder to maintain coaxiality and improve the stability when the clamping component drives the cross bar of the ladder to rotate.

[0013] Preferably, the third driving assembly includes a third motor, an upper arc-shaped plate rotatably connected to the first arc-shaped plate, and a lower arc-shaped plate rotatably connected to the second arc-shaped plate. The upper arc-shaped plate and the lower arc-shaped plate are slidably connected to the first driving assembly vertically. The third motor is fixedly connected to the first driving assembly, and a third gear is fixedly connected to the output end of the third motor. A first rack and a second rack are respectively engaged with the front and rear sides of the third gear. The first rack is fixedly connected to the upper arc-shaped plate, and the second rack is fixedly connected to the lower arc-shaped plate. The third motor drives the third gear to rotate, and the third gear drives the upper arc-shaped plate and the lower arc-shaped plate to open and close through the first rack and the second rack.

[0014] Preferably, the first driving assembly includes a first motor and a mounting rod. The first motor is fixedly installed on the storage bin. The mounting rod is slidably connected to the storage bin vertically. A first gear is fixedly connected to the output end of the first motor. A toothed section meshing with the first gear is arranged on the mounting rod. The first motor drives the first gear to rotate, and the first gear drives the mounting rod to move up and down through the toothed section. The third motor is fixedly connected to the mounting rod, and the upper arc-shaped plate and the lower arc-shaped plate are slidably connected to the mounting rod.

[0015] Preferably, the second driving assembly includes a second motor and a second gear. The second motor is fixedly installed on the upper arc-shaped plate. The second gear is fixedly connected to the output end of the second motor. Arc-shaped racks are respectively arranged on the first arc-shaped plate and the second arc-shaped plate. The second gear meshes with the arc-shaped racks. When the first arc-shaped plate and the second arc-shaped plate are buckled, the second motor drives the second gear to rotate, and the second gear drives the first arc-shaped plate and the second arc-shaped plate to rotate through the arc-shaped racks.

[0016] Preferably, a third arc-shaped plate is rotatably connected to the first arc-shaped plate, and a fourth arc-shaped plate is rotatably connected to the second arc-shaped plate. A welding torch mounting bracket is arranged on the third arc-shaped plate. A fourth motor is fixedly installed on the second arc-shaped plate. A fourth gear is fixedly connected to the output end of the fourth motor. Arc-shaped racks are respectively arranged on the third arc-shaped plate and the fourth arc-shaped plate. The fourth gear meshes with the arc-shaped racks. When the first arc-shaped plate and the second arc-shaped plate are buckled, the third arc-shaped plate and the fourth arc-shaped plate are also in a buckled state. When the fourth motor drives the fourth gear to rotate, the fourth gear drives the third arc-shaped plate and the fourth arc-shaped plate to rotate through the arc-shaped racks.

[0017] By providing the welding torch mounting bracket, after the welding torch is mounted on the welding torch mounting bracket, the welding torch mounting bracket is driven to rotate, realizing the automatic circumferential welding of the welding torch to the cross bar and the vertical bar.

[0018] Preferably, arc-shaped clamping plates are respectively arranged on the sides of the first arc-shaped plate and the second arc-shaped plate facing each other. The arc-shaped clamping plates are threadedly connected to the first arc-shaped plate and the second arc-shaped plate through stud bolts.

[0019] By screwing the stud bolts to change the distance between the arc-shaped clamping plates and the first arc-shaped plate and the second arc-shaped plate, when the first arc-shaped plate and the second arc-shaped plate are buckled, the two arc-shaped clamping plates clamp the ladder cross bar, so that the clamping assembly can adapt to ladder cross bars with different pipe diameters.

[0020] Preferably, the mounting seat is slidably connected to the storage box in the front-rear direction, and a fourth driving assembly is provided on the storage box to drive the two mounting seats to move synchronously away from or close to each other.

[0021] Adjust the distance between the positioning wheels on the two mounting seats 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, and improve the applicability of the present invention.

[0022] Preferably, a vertically arranged pressing plate is fixedly connected to the top of the grinding plate, and inclined wedge surfaces are respectively arranged on one side of the two pressing plates close to the feeding assembly. When the ladder cross bar is placed into the clamping assembly by the feeding assembly, both ends of the ladder cross bar enter between the two pressing plates through the pressing inclined wedge surfaces.

[0023] Preferably, a slope surface is arranged in the storage box, and a blanking gap for the ladder cross bar to pass through is formed between the slope surface and the storage box. An inclined plate is arranged below the blanking gap of the storage box. The feeding assembly includes a mounting shaft rotatably connected in the storage box and four feeding plates evenly distributed at intervals along the circumference of the mounting shaft. A baffle extends at the end of the feeding plate, and the feeding plate and the baffle form an L-shaped structure. A fifth driving assembly for driving the mounting shaft to rotate is arranged in the storage box, and an avoidance groove for the feeding plate to pass through is opened at one end of the inclined plate close to the mounting shaft.

[0024] The beneficial effects of the present invention are as follows: (1) By driving the positioning wheels to move on the vertical rod, the present invention limits the distance between the two vertical rods. The clamping assembly is driven by the first driving assembly to lower the ladder cross bar, replacing manual placement, reducing labor consumption, and by controlling the stroke of the positioning wheels, the ladder cross bars can be evenly lowered at intervals;

[0025] (2) The positioning device for welding ladder pipes of the present invention not only has a small volume and flexible use sites, but also can be applicable to the positioning of ladders of different lengths, with high flexibility and applicability;

[0026] (3) The present invention grinds the burrs at the ends of the ladder cross bars through the grinding plate, which is beneficial to the subsequent welding between the cross bars and the vertical rods. Moreover, since the grinding plate is inclined, chamfers will be formed at the edges of both ends of the ladder cross bar during the grinding process of the grinding plate, which is beneficial for the clamping assembly to smoothly place the ladder cross bar between the two ladder vertical rods. Description of the Drawings

[0027] Figure 1 is a schematic diagram of a positioning device for welding ladder pipes of the present invention in the use state.

[0028] Figure 2 is a cross-sectional view of a positioning device for welding ladder pipes of the present invention from the first perspective.

[0029] Figure 3It is a cross-sectional view of a positioning device for welding a ladder pipe according to the present invention from a second perspective.

[0030] Figure 4 It is a schematic structural diagram of a feeding component of a positioning device for welding a ladder pipe according to the present invention.

[0031] Figure 5 It is a schematic structural diagram of a first driving component of a positioning device for welding a ladder pipe according to the present invention.

[0032] Figure 6 It is a schematic diagram of a clamping component of a positioning device for welding a ladder pipe according to the present invention from a first perspective.

[0033] Figure 7 It is a schematic diagram of a clamping component of a positioning device for welding a ladder pipe according to the present invention from a second perspective.

[0034] Figure 8 It is a schematic diagram of a partial structure of a clamping component of a positioning device for welding a ladder pipe according to the present invention.

[0035] Figure 9 It is a schematic structural diagram of an extrusion plate and a grinding plate of a positioning device for welding a ladder pipe according to the present invention.

[0036] Reference numerals:

[0037] 1. Storage bin; 11. Feeding port; 12. Sloping surface; 13. Inclined plate; 14. Avoidance groove; 15. First motor; 16. Mounting rod; 17. First gear; 2. Vertical rod; 3. Cross bar; 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. Pushing plate; 62. Baffle; 63. Fifth gear; 64. Sixth gear; 65. Driving rod; 66. Transmission rod; 67. Spring; 68. Top push rod; 71. First arc-shaped plate; 72. Second arc-shaped plate; 73. Arc-shaped clamping plate; 74. Stud; 75. First arc-shaped rack; 8. Third motor; 81. Upper arc-shaped plate; 82. Lower arc-shaped plate; 83. Third gear; 84. First rack; 85. Second rack; 86. Second motor; 87. Second gear; 91. Third arc-shaped plate; 92. Fourth arc-shaped plate; 93. Welding torch mounting bracket; 94. Fourth motor; 95. Fourth gear; 96. Second arc-shaped rack. Detailed implementation manners

[0038] The embodiments of the present invention will be described in detail below, and the examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0039] As Figures 1 to 9As shown in the figure, a positioning device for welding a ladder tube according to the present invention includes a storage bin 1 and two wheel sets symmetrically arranged at the bottom of the storage bin 1. The wheel sets are used to position the vertical rods 2 of the ladder. The extending direction of the vertical rod 2 of the ladder is defined as the left - right direction. Each wheel set includes a mounting seat 4 and three positioning wheels 41 arranged at intervals in the left - right direction. The positioning wheels 41 are rotatably connected to the mounting seat 4, and a driving motor (not shown in the figure) for driving the positioning wheels 41 to rotate is provided on the mounting seat 4. A positioning groove 42 adapted to the vertical rod 2 of the ladder is formed on the outer periphery of the positioning wheel 41.

[0040] When positioning the vertical rod 2 of the ladder, align the vertical rod 2 of the ladder with the positioning groove 42 on the corresponding positioning wheel 41 and place it into the positioning groove 42. The positioning wheels 41 of the two wheel sets form a restriction on the positions of the two vertical rods 2 of the ladder through the positioning grooves 42, thereby realizing the positioning of the two vertical rods 2 of the ladder.

[0041] An upper - feeding component and a clamping component are arranged in the storage bin 1. The upper - feeding component is used to place the cross - bar 3 of the ladder in the storage bin 1 into the clamping component. A first driving component for driving the clamping component to move vertically and a second driving component for driving the clamping component to rotate are arranged on the storage bin 1.

[0042] Two grinding plates 5 are symmetrically arranged on the front and rear sides of the clamping component. The grinding plates 5 are elastically connected to the storage bin 1 through elastic members 51, and the two grinding plates 5 are inclined towards each other from top to bottom. When the upper - feeding component places the cross - bar 3 of the ladder into the clamping component and the clamping component drives the cross - bar 3 of the ladder to move downward, the two ends of the cross - bar 3 of the ladder respectively contact the corresponding grinding plates 5. By driving the second driving component to drive the clamping component to drive the cross - bar 3 of the ladder to rotate around the central axis of the cross - bar 3, the grinding plates 5 grind the two ends of the cross - bar 3 of the ladder. On the one hand, grinding the burrs at the ends of the cross - bar 3 of the ladder is beneficial to the subsequent welding between the cross - bar 3 and the vertical rod 2. On the other hand, because the grinding plates 5 are inclined, chamfers will be formed at the edges of the two ends of the cross - bar 3 of the ladder during the grinding process by the grinding plates 5, which is beneficial for the clamping component to smoothly place the cross - bar 3 of the ladder between the two vertical rods 2 of the ladder.

[0043] The present invention drives the positioning wheels 41 to move on the vertical rod 2, so that the positioning wheels 41 limit the distance between the two vertical rods 2. By driving the first driving component to drive the clamping component to lower the cross - bar 3 of the ladder, it replaces manual placement, reduces labor consumption, and by controlling the stroke of the positioning wheels 41, the cross - bar 3 of the ladder can be evenly placed at intervals; in addition, the positioning device for welding a ladder tube of the present invention not only has a small volume and flexible use sites, but also can be applicable to the positioning of ladders of different lengths, with high flexibility and applicability.

[0044] As Figures 1 to 4As shown in the figure, a feeding port 11 is opened at the top of the storage bin 1. A slope surface 12 is provided below the feeding port 11 of the storage bin 1. A blanking gap for the ladder cross bar 3 to pass through is formed between the slope surface 12 and the storage bin 1. An inclined plate 13 is provided below the blanking gap of the storage bin 1. The inclined plate 13 is inclined downward from the end far away from the feeding component to the end close to the feeding component. The feeding component includes a mounting shaft 6 rotatably connected inside the storage bin 1 and four feeding plates 61 evenly distributed at intervals along the circumference of the mounting shaft 6. A baffle 62 extends at the end of the feeding plate 61. The feeding plate 61 and the baffle 62 form an L-shaped structure.

[0045] A driving component five for driving the mounting shaft 6 to rotate is arranged inside the storage bin 1. An avoidance groove 14 for the feeding plate 61 to pass through is opened at one end of the inclined plate 13 close to the mounting shaft 6. The ladder cross bar 3 rolls upward along the inclined plate 13 to the feeding component. During the process of the feeding plate 61 rotating upward from below the avoidance groove 14, the ladder cross bar 3 will be lifted and driven to rotate towards the clamping component. After the ladder cross bar 3 is aligned with the clamping component, the ladder cross bar 3 rolls off the feeding plate 61 and into the clamping component, realizing the automatic feeding of the ladder cross bar 3.

[0046] The driving component five includes a gear five 63, a gear six 64, a driving rod 65 and a transmission rod 66. The gear five 63 is connected to the mounting shaft 6 through a one-way bearing. The gear six 64 is rotatably connected to the storage bin 1. The transmission rod 66 is arranged between the gear five 63 and the gear six 64 and is slidably connected to the storage bin 1 in the vertical direction. A tooth section meshing with the gear five 63 is arranged on one side of the transmission rod 66 facing the gear five 63. A tooth section meshing with the gear six 64 is arranged on one side of the transmission rod 66 facing the gear six 64. The driving rod 65 is slidably matched with the storage bin 1 in the vertical direction and is elastically connected to the storage bin 1 through a spring 67. A tooth section meshing with the gear six 64 is arranged on the driving rod 65. The driving rod 65 is fixedly connected with a top push rod 68.

[0047] When the clamping component moves upward, it will contact the top push rod 68 and push the top push rod 68 upward. The top push rod 68 drives the driving rod 65 to move upward. The tooth section on the driving rod 65 drives the gear six 64 to rotate. The gear six 64 drives the gear five 63 to rotate through the transmission rod 66. The gear five 63 drives the mounting shaft 6 to rotate through the one-way bearing. The mounting shaft 6 drives the feeding plate 61 to rotate, so as to realize the feeding plate 61 conveying the ladder cross bar 3 into the clamping component. When the clamping component moves downward, the pushing on the top push rod 68 will be cancelled. The driving rod 65 returns to its original position under the elastic force of the spring 67. Since the gear five 63 is connected to the mounting shaft 6 through a one-way bearing, when the driving rod 65 drives the gear five 63 to rotate in the reverse direction during the reset process, the gear five 63 will not drive the mounting shaft 6 to rotate, thus realizing the one-way rotation and feeding of the driving mounting shaft 6.

[0048] As Figures 6 to 8As shown in the figure, to improve the stability of the clamping assembly for clamping the cross bar 3 of the ladder, two clamping assemblies are symmetrically arranged front and back in this embodiment. The clamping assembly includes an arc-shaped plate one 71 and an arc-shaped plate two 72, and the arc-shaped plate one 71 and the arc-shaped plate two 72 are buckled to form a circular ring for clamping the cross bar 3 of the ladder. To adapt to cross bars 3 with different pipe diameters, in this embodiment, arc-shaped clamping plates 73 are respectively arranged on the sides of the arc-shaped plate one 71 and the arc-shaped plate two 72 facing each other. The arc-shaped clamping plates 73 are threadedly connected to the arc-shaped plate one 71 and the arc-shaped plate two 72 through stud bolts 74. By screwing the stud bolts 74, the distance between the arc-shaped clamping plates 73 and the arc-shaped plate one 71 and the arc-shaped plate two 72 is changed. When the arc-shaped plate one 71 and the arc-shaped plate two 72 are buckled, the two arc-shaped clamping plates 73 clamp the cross bar 3.

[0049] As Figure 1 and Figure 5 shown in the figure, a driving assembly three for driving the arc-shaped plate one 71 and the arc-shaped plate two 72 to open and close is arranged on the driving assembly one. The driving assembly one includes a motor one 15 and a mounting rod 16. The motor one 15 is fixedly installed on the storage bin 1. The mounting rod 16 is slidably connected to the storage bin 1 in the vertical direction. The output end of the motor one 15 is fixedly connected with a gear one 17. A tooth section meshing with the gear one 17 is arranged on the mounting rod 16. The motor one 15 drives the gear one 17 to rotate, and the gear one 17 drives the mounting rod 16 to move up and down through the tooth section. After the mounting rod 16 lowers the clamping assembly in place, the motor one 15 stops driving.

[0050] As Figures 5 to 8 shown in the figure, the driving assembly three includes a motor three 8, an upper arc-shaped plate 81 rotatably connected to the arc-shaped plate one 71, and a lower arc-shaped plate 82 rotatably connected to the arc-shaped plate two 72. The upper arc-shaped plate 81 and the lower arc-shaped plate 82 are slidably connected to the mounting rod 16 in the vertical direction. The motor three 8 is fixedly connected to the mounting rod 16, and the output end of the motor three 8 is fixedly connected with a gear three 83. A rack one 84 and a rack two 85 are respectively meshed on the front and rear sides of the gear three 83. The rack one 84 is fixedly connected to the upper arc-shaped plate 81, and the rack two 85 is fixedly connected to the lower arc-shaped plate 82. The motor three 8 drives the gear three 83 to rotate, and the gear three 83 drives the upper arc-shaped plate 81 and the lower arc-shaped plate 82 to open and close through the rack one 84 and the rack two 85. The upper arc-shaped plate 81 and the lower arc-shaped plate 82 drive the arc-shaped plate one 71 and the arc-shaped plate two 72 to open and close.

[0051] The second driving component includes a second motor 86 and a second gear 87. The second motor 86 is fixedly installed on the upper arc-shaped plate 81, and the second gear 87 is fixedly connected to the output end of the second motor 86. Arc-shaped racks 75 are respectively and fixedly connected to the first arc-shaped plate 71 and the second arc-shaped plate 72. When the first arc-shaped plate 71 and the second arc-shaped plate 72 are buckled, the arc-shaped racks 75 on the first arc-shaped plate 71 and the second arc-shaped plate 72 are also buckled to form a ring. The second gear 87 meshes with the arc-shaped rack 75. The second motor 86 drives the second gear 87 to rotate, and the second gear 87 drives the first arc-shaped plate 71 and the second arc-shaped plate 72 to rotate relative to the upper arc-shaped plate 81 and the lower arc-shaped plate 82 through the arc-shaped rack 75, thereby driving the ladder crossbar 3 to rotate.

[0052] The first arc-shaped plate 71 is rotatably connected to a third arc-shaped plate 91, and the second arc-shaped plate 72 is rotatably connected to a fourth arc-shaped plate 92. A welding torch mounting bracket 93 is provided on the third arc-shaped plate 91, and a fourth motor 94 is fixedly installed on the second arc-shaped plate 72. The output end of the fourth motor 94 is fixedly connected to a fourth gear 95. Arc-shaped racks 96 are respectively and fixedly connected to the third arc-shaped plate 91 and the fourth arc-shaped plate 92. The fourth gear 95 meshes with the arc-shaped rack 96. When the first arc-shaped plate 71 and the second arc-shaped plate 72 are buckled, the third arc-shaped plate 91 and the fourth arc-shaped plate 92 are also in a buckled state, and the arc-shaped racks 96 on the third arc-shaped plate 91 and the fourth arc-shaped plate 92 are also in a buckled state.

[0053] The welding torch is installed on the welding torch mounting bracket 93, and an electric push rod (not shown in the figure) for driving the welding torch to move is also installed on the welding torch mounting bracket 93. After the clamping component lowers the ladder crossbar 3 between the two vertical bars 2, the electric push rod is controlled to push the welding torch to the abutting position of the crossbar 3 and the vertical bar 2. The fourth motor 94 is controlled to drive the fourth gear 95 to rotate, and the fourth gear 95 drives the third arc-shaped plate 91 and the fourth arc-shaped plate 92 to rotate relative to the first arc-shaped plate 71 and the second arc-shaped plate 72 through the arc-shaped rack 96, thereby driving the welding torch mounting bracket 93 to rotate. The welding torch mounting bracket 93 drives the welding torch to rotate to weld the ladder crossbar 3 and the vertical bar 2. After the welding of the crossbar 3 is completed, the electric push rod is controlled to pull the welding torch back, and the first arc-shaped plate 71 and the second arc-shaped plate 72 are controlled to open up and down to cancel the clamping of the ladder crossbar 3. Then, the positioning wheel 41 on the storage box 1 is controlled to continue to move to place and weld the next crossbar 3. It can be understood that in other embodiments, manual welding can also be performed.

[0054] As Figure 3As shown, the mounting base 4 is slidably connected to the storage bin 1 in the front-rear direction, and a fourth driving assembly for driving the two mounting bases 4 to move synchronously away from or towards each other is provided on the storage bin 1. The fourth driving assembly includes a double-headed cylinder (not shown in the figure) fixedly installed at the bottom of the storage bin 1, and the two driving ends of the double-headed cylinder are respectively fixedly connected to the mounting bases 4 of the corresponding wheel sets. The distance between the positioning wheels 41 on the two mounting bases 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.

[0055] As Figure 1 and Figure 9 shown, a vertically arranged pressing plate 52 is fixedly connected to the top of the grinding plate 5. Wedge surfaces 53 are respectively provided on one side of the two pressing plates 52 close to the feeding assembly. When the ladder cross bar 3 is placed into the clamping assembly by the feeding assembly, the two ends of the ladder cross bar 3 enter between the two pressing plates 52 by pressing the wedge surfaces 53, so as to realize the centering positioning of the ladder cross bar 3.

[0056] The specific working principle of a positioning device for welding ladder pipes of the present invention is as follows: Align the ladder vertical bar 2 with the positioning groove 42 on the corresponding positioning wheel 41 and place it into the positioning groove 42. The positioning wheels 41 of the two wheel sets limit the positions of the two ladder vertical bars 2 through the positioning groove 42;

[0057] Place the ladder cross bar 3 into the storage bin 1. The ladder cross bar 3 rolls down the slope surface 12 below the feeding port 11 onto the inclined plate 13 and rolls along the inclined plate 13 into the space formed by the two feeding plates 61;

[0058] Control the motor 15 to drive the gear 17 to rotate, so that the gear 17 drives the mounting rod 16 to move upward through the tooth section. The mounting rod 16 drives the clamping assembly to move upward. When the arc plate 71 contacts the top push rod 68, it pushes the top push rod 68 upward. The top push rod 68 drives the driving rod 65 to move upward. The tooth section on the driving rod 65 drives the gear 64 to rotate. The gear 64 drives the gear 63 to rotate through the transmission rod 66. The gear 63 drives the mounting shaft 6 to rotate through the one-way bearing. The mounting shaft 6 drives the material pushing plate 61 to rotate. The material pushing plate 61 rotates upward from below the avoidance groove 14 on the inclined plate 13 and picks up the ladder cross bar 3 and continues to rotate. At this time, the arc plate 71 and the arc plate 72 are in an open state up and down. A space for the ladder cross bar 3 to enter is formed between the arc plate 71 and the arc plate 72 and between the upper and lower arc-shaped clamping plates 73. When the material pushing plate 61 drives the ladder cross bar 3 to continue rotating until the material pushing plate 61 located below the ladder cross bar 3 is in a state of tilting downward at the end, the ladder cross bar 3 rolls between the arc plate 71 and the arc plate 72 under the action of its own gravity. And the baffle 62 above the ladder cross bar 3 will form a top push on the ladder cross bar 3 during the continuous rotation, so that the ladder cross bar 3 squeezes the inclined wedge surface 53 and enters between the two pressing plates 52, and finally falls between the upper and lower arc-shaped clamping plates 73;

[0059] Control the motor 3 8 to drive the gear 3 83 to rotate. 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. The upper arc plate 81 and the lower arc plate 82 drive the arc plate 71 and the arc plate 72 to buckle. The upper and lower arc-shaped clamping plates 73 clamp the ladder cross bar 3;

[0060] Control the motor 15 to drive the gear 17 to rotate, so that the gear 17 drives the mounting rod 16 to move downward through the tooth section. The mounting rod 16 drives the clamping assembly and the ladder cross bar 3 to move downward. During the downward movement, control the motor 2 86 to drive the gear 2 87 to rotate. The gear 2 87 drives the arc plate 71 and the arc plate 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 71 and the arc plate 72 drive the ladder cross bar 3 to rotate through the arc-shaped clamping plate 73. The ladder cross bar 3 rotates and moves downward at the same time. The grinding plate 5 grinds the two ends of the ladder cross bar 3;

[0061] After the mounting rod 16 drives the clamping assembly and the ladder cross bar 3 to move between the two vertical rods 2, control the electric push rod to push the welding torch to the abutting place of the cross bar 3 and the vertical rod 2. Control the motor 4 94 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 71 and the arc plate 72 through the arc rack 2 96. The arc plate 3 91 and the arc plate 4 92 drive the welding torch mounting bracket 93 to rotate. The welding torch mounting bracket 93 drives the welding torch to rotate and weld the ladder cross bar 3 and the vertical rod 2;

[0062] After completing the welding of the cross bar 3, control the electric push rod to pull back the welding torch, and control the motor three 8 to drive the gear three 83 to rotate. 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. 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. 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, cancel the clamping of the ladder cross bar 3, and then control the positioning wheel 41 on the storage box 1 to continue walking for the placement and welding of the next ladder cross bar 3.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0064] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0065] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation to the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to 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 group is used to position the vertical rod of the ladder, and the extension direction of the ladder vertical rod is defined as the left and right direction. The wheel group includes a mounting seat and a plurality of positioning wheels arranged at intervals 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 feeding assembly and a clamping assembly are arranged in the material storage box, and the feeding assembly includes a mounting shaft rotatably connected to the material storage box and four material stripping plates evenly distributed along the circumferential interval of the mounting shaft, a baffle plate extends from the end of the material stripping plate, and the material stripping plate and the baffle plate form an L-shaped structure; the feeding assembly is used to place the ladder crossbar in the material storage box in the clamping assembly, and a driving clamp is arranged on the material storage box The holding assembly comprises a driving assembly 1 which moves along the vertical direction and a driving assembly 2 which drives the clamping assembly to rotate; the clamping assembly comprises an arc plate 1 and an arc plate 2 which are buckled together to form a circular ring for clamping the ladder cross bar; the driving assembly 1 is provided with a driving assembly 3 which drives the arc plate 1 and the arc plate 2 to open and close; two grinding plates are symmetrically provided 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 toward each other; when the driving assembly 1 drives the clamping assembly to drive the ladder cross bar to move downward, the driving assembly 2 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: 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.

3. The positioning device for ladder pipe welding according to claim 2, 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.

4. The positioning device for ladder pipe welding according to claim 2, 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.

5. The positioning device for ladder pipe welding according to claim 2, 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.

6. The positioning device for ladder pipe welding according to claim 2, 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.

7. 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.

8. 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.

9. The positioning device for ladder pipe welding according to claim 1, characterized in that: A slope surface is arranged 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. A ramp is arranged below the material unloading gap in the material storage box. A driving component 5 for driving the mounting shaft to rotate is arranged in the material storage box, and an avoidance groove for the material shifting plate to pass through is provided at one end of the ramp plate close to the mounting shaft.

Images