Bicycle frame welding robot

Abstract

The invention discloses a bicycle frame welding robot, and relates to the technical field of bicycle frame welding. The welding mechanism comprises a mounting plate fixedly connected to the upper end of the base, a first rotating shaft is rotatably connected to the side wall of the mounting plate, a first rod is fixedly connected to the side wall of the first rotating shaft, a vertical groove is formed in the upper end of the first rod, and a first sliding plug is slidably connected to the inner wall of the vertical groove in a sealed mode; the upper end of the first sliding plug is fixedly connected with a second rod, and a first spring is fixedly connected between the inner bottom of the vertical groove and the first sliding plug. The motor is started, the welding gun can rotate by a circle to form an intersecting line track, intersecting line welding is formed between a large pipe and a small pipe, compared with manual welding through a mechanical mechanism, efficiency is higher, and compared with expensive control equipment and control programs, the mechanical structure is low in price, low in fault rate and suitable for small and medium-sized enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of bicycle frame welding, and particularly relates to a bicycle frame welding robot. Background Art

[0002] A bicycle, also known as a pedal bike or a cycle, is usually a small two-wheeled vehicle on land. After a person rides on it, it uses the pedals as power and is an environmentally friendly means of transportation. There are many types of bicycles, including single bicycles, tandem bicycles, and multi-person bicycles, which can be used as environmentally friendly means of transportation for commuting and traveling.

[0003] A bicycle frame includes a head tube, an upper tube, a lower tube, and a seat tube. Welding and fixing are required between each pipe, and the welding positions are usually in the shape of a skew line. Therefore, the welding torch needs to run along a skew line trajectory during welding. Currently, this kind of running trajectory is usually achieved manually or by relevant control equipment. Manual operation of the welding torch has low welding efficiency and irregular weld shapes. Using relevant control equipment to control the welding torch to run along a skew line trajectory requires corresponding control equipment to cooperate with a control program for control. The procurement price of the equipment program is expensive and is not suitable for small and medium-sized enterprises.

[0004] Based on this, we propose a bicycle frame welding robot. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies in the prior art and propose a bicycle frame welding robot.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A bicycle frame welding robot includes a base;

[0008] A welding mechanism, the welding mechanism includes a mounting plate fixedly connected to the upper end of the base. A first rotating shaft is rotatably connected to the side wall of the mounting plate. A first rod is fixedly connected to the side wall of the first rotating shaft. A vertical groove is opened at the upper end of the first rod. A first sliding plug is hermetically slidably connected to the inner wall of the vertical groove. A second rod is fixedly connected to the upper end of the first sliding plug. A first spring is fixedly connected between the bottom of the vertical groove and the first sliding plug. The upper end of the second rod penetrates through the upper end of the first rod and is fixedly connected to a sliding cylinder. A sliding rod is hermetically slidably connected to the inner wall of the sliding cylinder. One end of the sliding rod is fixedly connected to a welding torch. An L-shaped frame is fixedly connected to the upper end of the base. A second rotating shaft is rotatably connected to the inner top of the L-shaped frame. A third rod is fixedly connected to the side wall of the second rotating shaft. A horizontal groove is opened on the side wall of the third rod. A second sliding plug is hermetically slidably connected to the inner wall of the horizontal groove. A fourth rod is fixedly connected to the side wall of the second sliding plug. A second spring is fixedly connected between the fourth rod and the inner wall of the horizontal groove. The side wall of the welding torch is slidably connected to the fourth rod;

[0009] A driving mechanism is installed on the L-shaped frame.

[0010] Preferably, the driving mechanism includes a motor fixedly connected to the upper end of the L-shaped frame through a bracket. A first gear is fixedly connected to the output end of the motor. The upper end of the second rotating shaft penetrates through the upper end of the L-shaped frame. A second gear is fixedly connected to the side wall of the second rotating shaft. The first gear is meshed with the second gear.

[0011] Preferably, a fixing mechanism is installed on the mounting plate. The fixing mechanism includes a fifth rod fixedly connected to the side wall of the mounting plate. The other end of the fifth rod is fixedly connected to a first fixing seat. A plurality of first sliding grooves are formed in the side wall of the first fixing seat. The inner walls of the plurality of first sliding grooves are all hermetically slidably connected with first fixing rods. One end of the first fixing rod is fixedly connected to a first fixing plate. A third spring is fixedly connected between the inner wall of the first sliding groove and the first fixing rod.

[0012] Preferably, the fixing mechanism further includes an L-shaped rod fixedly connected to the side wall of the first fixing seat. A groove is formed in the upper end of the L-shaped rod. A sixth rod is slidably connected to the inner wall of the groove. The upper end of the sixth rod is fixedly connected to a second fixing seat. A fourth spring is fixedly connected between the bottom of the groove and the sixth rod. A plurality of second sliding grooves are formed in the side wall of the second fixing seat. The inner walls of the plurality of second sliding grooves are all hermetically slidably connected with second fixing rods. The other end of the second fixing rod is fixedly connected to a second fixing plate. A fifth spring is fixedly connected between the inner wall of the second sliding groove and the second fixing rod.

[0013] Preferably, an adjusting mechanism is installed on the first rotating shaft. The adjusting mechanism includes a first air inlet groove formed in the first rotating shaft. The first air inlet groove is communicated with the vertical groove through a first air pipe. The side wall of the mounting plate is fixedly connected to a first rotary joint through a bracket. One end of the first rotating shaft penetrates through the side wall of the mounting plate and is fixedly connected to the first rotary joint. A first communicating pipe is fixedly connected to the inner wall of one of the first sliding grooves. The other end of the first communicating pipe is fixedly connected to the first rotary joint.

[0014] Preferably, the adjusting mechanism further includes a second air inlet groove formed in the second rotating shaft. The second air inlet groove is communicated with the horizontal groove through a second air pipe. The upper end of the L-shaped frame is fixedly connected to a second rotary joint through a bracket. The upper end of the second rotating shaft is fixedly connected to the second rotary joint. A second communicating pipe is fixedly connected to the inner wall of one of the second sliding grooves. The other end of the second communicating pipe is fixedly connected to the second rotary joint.

[0015] Preferably, a cooling mechanism is installed on the L-shaped frame. The cooling mechanism includes a liquid inlet cavity opened in the L-shaped frame. A plurality of liquid spraying holes are opened on the inner wall of the liquid inlet cavity. A one-way liquid inlet pipe is fixedly connected to the inner wall of the sliding cylinder. The other end of the one-way liquid inlet pipe is communicated with a container for storing coolant externally. The sliding cylinder is communicated with the liquid inlet cavity through a one-way liquid outlet pipe.

[0016] Preferably, a ventilation groove is opened at the top inside the L-shaped frame. A plurality of fan blades are fixedly connected to the side wall of the second rotating shaft located in the ventilation groove. A smoke exhaust pipe is fixedly connected to the inner wall of the ventilation groove. The other end of the smoke exhaust pipe is communicated with a container for collecting soot externally.

[0017] Preferably, the distance from the first fixing plate to the center of the first fixing seat is equal to the distance from the center of the sliding cylinder to the first rotating shaft, and the distance from the second fixing plate to the center of the second fixing seat is equal to the distance from the center of the second rotating shaft to the center of the welding torch.

[0018] The present invention has the following beneficial effects:

[0019] 1. By setting the welding mechanism and the driving mechanism, starting the motor can make the welding torch rotate one circle to form an intersection line trajectory, and perform intersection line welding between the large pipe and the small pipe. Compared with manual work, it is realized by a mechanical mechanism, with higher efficiency. Compared with using expensive control equipment and control programs, the mechanical structure is cheap and has a low failure rate, which is suitable for small and medium-sized enterprises;

[0020] 2. By setting the fixing mechanism and the adjusting mechanism, pipes with different diameters can be welded. When welding large pipes and small pipes with different diameters, the intersection line trajectory of the welding torch running will be adjusted synchronously. Therefore, the whole device can be applied to welding pipes with different diameters, and the application range is wider;

[0021] 3. By setting the cooling mechanism, during the welding process, due to the reciprocating sealing sliding of the sliding rod, the external coolant will be pumped into the sliding cylinder through the one-way liquid inlet pipe, then the coolant will enter the liquid inlet cavity through the one-way liquid outlet pipe, and finally the coolant is sprayed out through a plurality of liquid spraying holes and sprayed onto the large pipe and the small pipe to quickly cool them and avoid damage to the pipes caused by high temperature;

[0022] 4. When welding pipes with smaller diameters, the distance of the reciprocating sliding of the sliding rod on the inner wall of the sliding cylinder will be shorter, and then less coolant will be pumped out for cooling. For pipes with smaller diameters, less heat is generated during welding, so less coolant can be used for cooling. Therefore, the cooling effect of the coolant can reach the best, and the coolant will not be wasted;

[0023] 5. By setting ventilation slots, fan blades and a smoke exhaust pipe, the rotation of the second rotating shaft will drive the rotation of multiple fan blades, thereby generating a suction force. The smoke and dust generated during the welding process will be sucked into the ventilation slots, and then the smoke and dust will be discharged into an external smoke and dust collection container through the smoke exhaust pipe, thus preventing the smoke and dust generated during the welding process from scattering into the air and polluting the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 FIG. is a schematic three-dimensional structure diagram of a bicycle frame welding robot proposed by the present invention;

[0025] Figure 2 is Figure 1 a rear view schematic diagram of the structure in;

[0026] Figure 3 is Figure 1 a sectional view schematic diagram of the structure in;

[0027] Figure 4 is Figure 3 a sectional structure schematic diagram of the second fixing seat in;

[0028] Figure 5 is Figure 3 an enlarged schematic diagram of the structure at A in;

[0029] Figure 6 is Figure 3 an enlarged schematic diagram of the structure at B in;

[0030] Figure 7 is Figure 3 an enlarged schematic diagram of the structure at C in;

[0031] Figure 8 is Figure 3 an enlarged schematic diagram of the structure at D in.

[0032] In the figure: 1, base; 2, mounting plate; 3, first rotating shaft; 4, first rod; 5, vertical groove; 6, second rod; 7, sliding cylinder; 8, sliding rod; 9, welding torch; 10, L-shaped frame; 11, second rotating shaft; 12, third rod; 13, first spring; 14, horizontal groove; 15, fourth rod; 16, second spring; 17, motor; 18, first gear; 19, second gear; 20, fifth rod; 21, first fixed seat; 22, first sliding groove; 23, first fixed rod; 24, first fixing plate; 25, third spring; 26, L-shaped rod; 27, groove; 28, sixth rod; 29, second fixed seat; 30, fourth spring; 31, second sliding groove; 32, second fixed rod; 33, second fixing plate; 34, fifth spring; 35, first air inlet groove; 36, first ventilation pipe; 37, first rotary joint; 38, first connecting pipe; 39, second air inlet groove; 40, second ventilation pipe; 41, second rotary joint; 42, second connecting pipe; 43, liquid inlet cavity; 44, liquid spraying hole; 45, one-way liquid inlet pipe; 46, one-way liquid outlet pipe; 47, ventilation groove; 48, fan blade; 49, exhaust pipe; 50, first sliding plug; 51, second sliding plug. Detailed implementation manners

[0033] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0034] Refer to Figure 1 - Figure 8 , a bicycle frame welding robot, including a base 1;

[0035] Welding mechanism, the welding mechanism includes a mounting plate 2 fixedly connected to the upper end of the base 1, a first rotating shaft 3 is rotatably connected to the side wall of the mounting plate 2, a first rod 4 is fixedly connected to the side wall of the first rotating shaft 3, a vertical groove 5 is opened at the upper end of the first rod 4, a first sliding plug 50 is hermetically slidably connected to the inner wall of the vertical groove 5, a second rod 6 is fixedly connected to the upper end of the first sliding plug 50, a first spring 13 is fixedly connected between the bottom of the vertical groove 5 and the first sliding plug 50, the upper end of the second rod 6 penetrates through the upper end of the first rod 4 and is fixedly connected to a sliding cylinder 7, a sliding rod 8 is hermetically slidably connected to the inner wall of the sliding cylinder 7, a welding torch 9 is fixedly connected to one end of the sliding rod 8, an L-shaped frame 10 is fixedly connected to the upper end of the base 1, a second rotating shaft 11 is rotatably connected to the inner top of the L-shaped frame 10, a third rod 12 is fixedly connected to the side wall of the second rotating shaft 11, a horizontal groove 14 is opened on the side wall of the third rod 12, a second sliding plug 51 is hermetically slidably connected to the inner wall of the horizontal groove 14, a fourth rod 15 is fixedly connected to the side wall of the second sliding plug 51, a second spring 16 is fixedly connected between the fourth rod 15 and the inner wall of the horizontal groove 14, and the side wall of the welding torch 9 is slidably connected to the fourth rod 15;

[0036] A driving mechanism is installed on the L-shaped frame 10.

[0037] The driving mechanism includes a motor 17 fixedly connected to the upper end of the L-shaped frame 10 through a bracket, a first gear 18 is fixedly connected to the output end of the motor 17, the upper end of the second rotating shaft 11 penetrates through the upper end of the L-shaped frame 10, a second gear 19 is fixedly connected to the side wall of the second rotating shaft 11, and the first gear 18 is meshed with the second gear 19.

[0038] Further, start the motor 17, drive the first gear 18 to rotate, and then drive the second gear 19 to rotate, drive the second rotating shaft 11 to rotate, thereby driving the third rod 12 to rotate, drive the fourth rod 15 to rotate, so that the welding torch 9 makes a circular motion around the center of the second rotating shaft 11. During this process, due to the limitation of the sliding rod 8, the sliding cylinder 7, the first rod 4 and the second rod 6, the welding torch 9 will move up and down a short distance, forming the high and low positions of the intersection line. And during this process, the first rod 4 and the second rod 6 will swing reciprocally, so that the first rotating shaft 3 will rotate reciprocally forward and backward. During the rotation of the welding torch 9, the sliding rod 8 will reciprocally slide hermetically on the inner wall of the sliding cylinder 7, so that the welding torch 9 rotates one circle to form an intersection line trajectory, and the intersection line welding is formed between the large pipe and the small pipe. Compared with manual work, it is realized by a mechanical mechanism and has higher efficiency. Compared with using expensive control equipment and control programs, the mechanical structure is cheap and has a low failure rate, and is suitable for small and medium-sized enterprises.

[0039] A fixing mechanism is installed on the mounting plate 2. The fixing mechanism includes a fifth rod 20 fixedly connected to the side wall of the mounting plate 2. The other end of the fifth rod 20 is fixedly connected to a first fixing seat 21. A plurality of first sliding grooves 22 are formed in the side wall of the first fixing seat 21. A first fixing rod 23 is hermetically slidably connected to the inner walls of the plurality of first sliding grooves 22. One end of the first fixing rod 23 is fixedly connected to a first fixing plate 24. A third spring 25 is fixedly connected between the inner wall of the first sliding groove 22 and the first fixing rod 23.

[0040] The fixing mechanism further includes an L-shaped rod 26 fixedly connected to the side wall of the first fixing seat 21. A groove 27 is formed in the upper end of the L-shaped rod 26. A sixth rod 28 is slidably connected to the inner wall of the groove 27. The upper end of the sixth rod 28 is fixedly connected to a second fixing seat 29. A fourth spring 30 is fixedly connected between the bottom of the inner part of the groove 27 and the sixth rod 28. A plurality of second sliding grooves 31 are formed in the side wall of the second fixing seat 29. A second fixing rod 32 is hermetically slidably connected to the inner walls of the plurality of second sliding grooves 31. The other end of the second fixing rod 32 is fixedly connected to a second fixing plate 33. A fifth spring 34 is fixedly connected between the inner wall of the second sliding groove 31 and the second fixing rod 32.

[0041] Further, sleeved the large pipe on the side wall of the first fixing plate 24. Under the action of the third spring 25, a plurality of first fixing plates 24 will be in close contact with the inner wall of the large pipe, thereby fixing the large pipe. Then sleeved the small pipe on the side wall of the second fixing plate 33. Under the action of the fifth spring 34, a plurality of second fixing plates 33 will be in close contact with the inner wall of the small pipe, thereby fixing the small pipe.

[0042] An adjusting mechanism is installed on the first rotating shaft 3. The adjusting mechanism includes a first air inlet groove 35 opened in the first rotating shaft 3. The first air inlet groove 35 is communicated with the vertical groove 5 through a first ventilation pipe 36. The side wall of the mounting plate 2 is fixedly connected with a first rotary joint 37 through a bracket. One end of the first rotating shaft 3 penetrates through the side wall of the mounting plate 2 and is fixedly connected with the first rotary joint 37. A first communication pipe 38 is fixedly connected to the inner wall of one of the first sliding grooves 22. The other end of the first communication pipe 38 is fixedly connected with the first rotary joint 37.

[0043] The adjusting mechanism further includes a second air inlet groove 39 opened in the second rotating shaft 11. The second air inlet groove 39 is communicated with the horizontal groove 14 through a second ventilation pipe 40. The upper end of the L-shaped frame 10 is fixedly connected with a second rotary joint 41 through a bracket. The upper end of the second rotating shaft 11 is fixedly connected with the second rotary joint 41. A second communication pipe 42 is fixedly connected to the inner wall of one of the second sliding grooves 31. The other end of the second communication pipe 42 is fixedly connected with the second rotary joint 41.

[0044] The distance from the center of the first fixing plate 24 to the center of the first fixing seat 21 is equal to the distance from the center of the sliding cylinder 7 to the first rotating shaft 3, and the distance from the center of the second fixing plate 33 to the center of the second fixing seat 29 is equal to the distance from the center of the second rotating shaft 11 to the center of the welding torch 9.

[0045] It should be noted that the second connecting pipe 42 is fixed to the inner wall of the second chute 31 in a detachable manner by screwing. When fixing the small pipe, the second connecting pipe 42 can be turned out. After the small pipe is fixed, the second connecting pipe 42 is screwed into the second chute 31.

[0046] Furthermore, before welding, when fixing the large pipe and the small pipe, since the first fixing plate 24 is directly in contact with the inner wall of the large pipe, when fixing different large pipes, the first fixing plate 24 will expand and contract, thereby driving the first fixing rod 23 to slide sealingly on the inner wall of the first chute 22. At this time, the air in the first chute 22 will enter the first air inlet groove 35 through the first connecting pipe 38, and then the air will enter the vertical groove 5 through the first air pipe 36, or the air in the vertical groove 5 is drawn back into the first chute 22, so that the second rod 6 rises or falls, and the changing distance of the second rod 6 is the same as the changing distance of the first fixing plate 24. Furthermore, for welding large pipes with different pipe diameters, the distance from the center of the sliding cylinder 7 to the first rotating shaft 3 will also change synchronously, so that the distance from the center of the sliding cylinder 7 to the center of the first rotating shaft 3 is the same as the inner radius of the large pipe. Similarly, since the second fixing plate 33 is directly in contact with the inner wall of the small pipe, when fixing different small pipes, the second fixing plate 33 will expand and contract, thereby driving the second fixing rod 32 to slide sealingly on the inner wall of the second chute 31. At this time, the air in the second chute 31 will enter the second air inlet groove 39 through the second connecting pipe 42, and then the air will enter the horizontal groove 14 through the second air pipe 40, or the air in the horizontal groove 14 is drawn back into the second chute 31, thereby causing the fourth rod 15 to move, and the moving distance of the fourth rod 15 is the same as the moving distance of the second fixing plate 33. Furthermore, for welding small pipes with different pipe diameters, the distance from the center of the welding torch 9 to the center of the second rotating shaft 11 is the same as the inner radius of the small pipe. Therefore, for welding large pipes and small pipes with different pipe diameters, the intersecting line trajectory of the operation of the welding torch 9 will also be adjusted synchronously. Therefore, the whole device can be used for welding pipes with different pipe diameters, and the application range is wider.

[0047] A cooling mechanism is installed on the L-shaped frame 10. The cooling mechanism includes a liquid inlet cavity 43 opened in the L-shaped frame 10. A plurality of liquid spraying holes 44 are opened on the inner wall of the liquid inlet cavity 43. A one-way liquid inlet pipe 45 is fixedly connected to the inner wall of the sliding cylinder 7. The other end of the one-way liquid inlet pipe 45 is communicated with an external container for storing coolant. The one-way liquid inlet pipe 45 only allows the external coolant to enter the sliding cylinder 7. The sliding cylinder 7 is communicated with the liquid inlet cavity 43 through a one-way liquid outlet pipe 46. The one-way liquid outlet pipe 46 only allows the coolant in the sliding cylinder 7 to enter the liquid inlet cavity 43.

[0048] Furthermore, during the welding process, due to the reciprocating sealing sliding of the sliding rod 8, the external coolant will be drawn into the sliding cylinder 7 through the one-way liquid inlet pipe 45. Then, the coolant will enter the liquid inlet cavity 43 through the one-way liquid outlet pipe 46. Finally, the coolant is sprayed out through a plurality of liquid spraying holes 44, sprayed onto the large pipe and the small pipe, and rapidly cools them to avoid damage to the pipe material caused by high temperature.

[0049] It is worth mentioning that when welding pipes with a smaller diameter, the distance that the sliding rod 8 reciprocally slides on the inner wall of the sliding cylinder 7 will be shorter. Consequently, less coolant will be drawn out for cooling. For pipes with a smaller diameter, less heat is generated during welding. Therefore, less coolant can be used for cooling. Thus, the cooling effect of the coolant can reach the best, and the coolant will not be wasted.

[0050] A ventilation groove 47 is formed at the inner top of the L-shaped frame 10. A plurality of fan blades 48 are fixedly connected to the side wall of the second rotating shaft 11 located in the ventilation groove 47. A smoke exhaust pipe 49 is fixedly connected to the inner wall of the ventilation groove 47, and the other end of the smoke exhaust pipe 49 communicates with a container for collecting soot outside.

[0051] Furthermore, the rotation of the second rotating shaft 11 will drive the rotation of a plurality of fan blades 48, thereby generating a suction force. The soot generated during the welding process will be drawn into the ventilation groove 47, and then the soot will be discharged into the external soot collection container through the smoke exhaust pipe 49, thus preventing the soot generated during the welding process from scattering into the air and polluting the working environment.

[0052] In the present invention, first, the large pipe is sleeved on the side wall of the first fixing plate 24. Under the action of the third spring 25, a plurality of first fixing plates 24 will be in close contact with the inner wall of the large pipe, thereby fixing the large pipe. Then, the small pipe is sleeved on the side wall of the second fixing plate 33. Under the action of the fifth spring 34, a plurality of second fixing plates 33 will be in close contact with the inner wall of the small pipe, thereby fixing the small pipe.

[0053] Then start the motor 17 to drive the first gear 18 to rotate, which in turn drives the second gear 19 to rotate, driving the second rotating shaft 11 to rotate, thereby driving the third rod 12 to rotate, driving the fourth rod 15 to rotate, so that the welding torch 9 makes a circular motion around the center of the second rotating shaft 11. During this process, due to the limitation of the sliding rod 8, the sliding cylinder 7, the first rod 4 and the second rod 6, the welding torch 9 will move up and down for a short distance, forming the high and low positions of the intersection line. And during this process, the first rod 4 and the second rod 6 will swing reciprocally, so that the first rotating shaft 3 rotates reciprocally forward and backward. During the rotation of the welding torch 9, the sliding rod 8 will slide reciprocally and sealingly on the inner wall of the sliding cylinder 7, so that the welding torch 9 rotates one circle to form an intersection line track, and the intersection line welding is formed between the large pipe and the small pipe. Compared with manual work, it is realized by a mechanical mechanism and has higher efficiency. Compared with using expensive control equipment and control programs, the mechanical structure is cheap and has a low failure rate, which is suitable for small and medium-sized enterprises.

[0054] During the welding process, due to the reciprocating and sealing sliding of the sliding rod 8, the external coolant will be pumped into the sliding cylinder 7 through the one-way liquid inlet pipe 45, then the coolant will enter the liquid inlet cavity 43 through the one-way liquid outlet pipe 46, and finally the coolant is sprayed out through a plurality of liquid spraying holes 44, spraying onto the large pipe and the small pipe to quickly cool them and prevent the pipes from being damaged due to high temperature.

[0055] The rotation of the second rotating shaft 11 will drive a plurality of fan blades 48 to rotate, thereby generating a suction force. The smoke and dust generated during the welding process will be sucked into the ventilation groove 47, and then the smoke and dust will be discharged into the external smoke and dust collection container through the smoke exhaust pipe 49, thus preventing the smoke and dust generated during the welding process from flying into the air and polluting the working environment.

[0056] Before welding, when fixing the large pipe and the small pipe, since the first fixing plate 24 is directly attached to the inner wall of the large pipe, when fixing different large pipes, the first fixing plate 24 will expand and contract, thereby driving the first fixing rod 23 to slide sealingly on the inner wall of the first sliding groove 22. At this time, the air in the first sliding groove 22 will enter the first air inlet groove 35 through the first connecting pipe 38, and then the air will enter the vertical groove 5 through the first air pipe 36, or the air in the vertical groove 5 is drawn back into the first sliding groove 22, causing the second rod 6 to rise or fall, and the changing distance of the second rod 6 is the same as the changing distance of the first fixing plate 24. Therefore, for welding large pipes with different pipe diameters, the distance from the center of the sliding cylinder 7 to the first rotating shaft 3 will also change synchronously, making the distance from the center of the sliding cylinder 7 to the center of the first rotating shaft 3 the same as the inner radius of the large pipe. Similarly, since the second fixing plate 33 is directly attached to the inner wall of the small pipe, when fixing different small pipes, the second fixing plate 33 will expand and contract, thereby driving the second fixing rod 32 to slide sealingly on the inner wall of the second sliding groove 31. At this time, the air in the second sliding groove 31 will enter the second air inlet groove 39 through the second connecting pipe 42, and then the air will enter the horizontal groove 14 through the second air pipe 40, or the air in the horizontal groove 14 is drawn back into the second sliding groove 31, thereby causing the fourth rod 15 to move, and the moving distance of the fourth rod 15 is the same as the moving distance of the second fixing plate 33. Therefore, for welding small pipes with different pipe diameters, the distance from the center of the welding torch 9 to the center of the second rotating shaft 11 is the same as the inner radius of the small pipe. Therefore, for welding large pipes and small pipes with different pipe diameters, the intersecting line trajectory of the welding torch 9 will also be adjusted synchronously, so that the entire device can be applicable to welding pipes with different pipe diameters, and the application range is wider.

[0057] In addition, when welding pipes with smaller diameters, the reciprocating sliding distance of the sliding rod 8 on the inner wall of the sliding cylinder 7 will be shorter, and thus less coolant will be drawn out for cooling. For pipes with smaller diameters, less heat is generated during welding, so less coolant can be used for cooling. Therefore, the cooling effect of the coolant can reach the best, and the coolant will not be wasted.

[0058] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A bicycle frame welding robot, characterized in that: include: Base (1); A welding mechanism, the welding mechanism comprising a mounting plate (2) fixedly connected to the upper end of a base (1), the side wall of the mounting plate (2) being rotatably connected to a first rotating shaft (3), the side wall of the first rotating shaft (3) being fixedly connected to a first rod (4), the upper end of the first rod (4) being provided with a vertical groove (5), the inner wall of the vertical groove (5) being sealingly and slidably connected to a first sliding plug (50), the upper end of the first sliding plug (50) being fixedly connected to a second rod (6), the inner bottom of the vertical groove (5) and the first sliding plug (50) being fixedly connected to a first spring (13), the upper end of the second rod (6) passing through the upper end of the first rod (4) and being fixedly connected to a sliding cylinder (7), the inner wall of the sliding cylinder (7) being sealingly and slidably connected to A slide rod (8) is connected, one end of the slide rod (8) is fixedly connected to a welding gun (9), the upper end of the base (1) is fixedly connected to an L-shaped frame (10), the top of the L-shaped frame (10) is rotatably connected to a second rotating shaft (11), the side wall of the second rotating shaft (11) is fixedly connected to a third rod (12), the side wall of the third rod (12) is provided with a transverse groove (14), the inner wall of the transverse groove (14) is sealingly and slidably connected to a second sliding plug (51), the side wall of the second sliding plug (51) is fixedly connected to a fourth rod (15), the fourth rod (15) and the inner wall of the transverse groove (14) are fixedly connected to a second spring (16), and the side wall of the welding gun (9) is slidably connected to the fourth rod (15); A driving mechanism is installed on the L-shaped frame (10).

2. A bicycle frame welding robot according to claim 1, characterized in that: in: The driving mechanism comprises a motor (17) fixedly connected to the upper end of the L-shaped frame (10) through a bracket, the output end of the motor (17) is fixedly connected to a first gear (18), the upper end of the second rotating shaft (11) is arranged to pass through the upper end of the L-shaped frame (10), the side wall of the second rotating shaft (11) is fixedly connected to a second gear (19), and the first gear (18) is meshingly connected to the second gear (19).

3. The bicycle frame welding robot according to claim 1, characterized in that: in: A fixing mechanism is installed on the mounting plate (2), and the fixing mechanism comprises a fifth rod (20) fixedly connected to the side wall of the mounting plate (2); the other end of the fifth rod (20) is fixedly connected to a first fixing seat (21); a plurality of first sliding grooves (22) are provided on the side wall of the first fixing seat (21); the inner walls of the plurality of first sliding grooves (22) are all sealed and slidably connected to a first fixing rod (23); one end of the first fixing rod (23) is fixedly connected to a first fixing plate (24); and a third spring (25) is fixedly connected between the inner wall of the first sliding groove (22) and the first fixing rod (23).

4. A bicycle frame welding robot according to claim 3, characterized in that: in: The fixing mechanism further comprises an L-shaped rod (26) fixedly connected to the side wall of the first fixing seat (21); a groove (27) is provided at the upper end of the L-shaped rod (26); a sixth rod (28) is slidably connected to the inner wall of the groove (27); a second fixing seat (29) is fixedly connected to the upper end of the sixth rod (28); a fourth spring (30) is fixedly connected between the inner bottom of the groove (27) and the sixth rod (28); a plurality of second sliding grooves (31) are provided on the side wall of the second fixing seat (29); the inner walls of the plurality of second sliding grooves (31) are all sealed and slidably connected to second fixing rods (32); the other end of the second fixing rod (32) is fixedly connected to a second fixing plate (33); a fifth spring (34) is fixedly connected between the inner wall of the second sliding groove (31) and the second fixing rod (32).

5. The bicycle frame welding robot according to claim 4, characterized in that: in: An adjusting mechanism is installed on the first rotating shaft (3), and the adjusting mechanism comprises a first air inlet groove (35) provided in the first rotating shaft (3), the first air inlet groove (35) being connected to the vertical groove (5) through a first ventilation pipe (36), the side wall of the mounting plate (2) being fixedly connected to a first rotating joint (37) through a bracket, one end of the first rotating shaft (3) passing through the side wall of the mounting plate (2) and being fixedly connected to the first rotating joint (37), a first connecting pipe (38) being fixedly connected to the inner wall of one of the first sliding grooves (22), and the other end of the first connecting pipe (38) being fixedly connected to the first rotating joint (37).

6. The bicycle frame welding robot according to claim 5, characterized in that: in: The adjustment mechanism also includes a second air inlet groove (39) provided in the second rotating shaft (11), the second air inlet groove (39) being connected to the transverse groove (14) via a second ventilation pipe (40), the upper end of the L-shaped frame (10) being fixedly connected to a second rotating joint (41) via a bracket, the upper end of the second rotating shaft (11) being fixedly connected to the second rotating joint (41), a second connecting pipe (42) being fixedly connected to the inner wall of one of the second sliding grooves (31), the other end of the second connecting pipe (42) being fixedly connected to the second rotating joint (41).

7. The bicycle frame welding robot according to claim 1, characterized in that: in: A cooling mechanism is installed on the L-shaped frame (10), and the cooling mechanism comprises a liquid inlet cavity (43) opened in the L-shaped frame (10), a plurality of liquid spray holes (44) are opened on the inner wall of the liquid inlet cavity (43), a one-way liquid inlet pipe (45) is fixedly connected to the inner wall of the slide cylinder (7), the other end of the one-way liquid inlet pipe (45) is connected to an external container for storing cooling liquid, and the slide cylinder (7) is connected to the liquid inlet cavity (43) through a one-way liquid outlet pipe (46).

8. The bicycle frame welding robot according to claim 1, characterized in that: in: A ventilation slot (47) is provided at the top of the L-shaped frame (10); a plurality of fan blades (48) are fixedly connected to the side wall of the second rotating shaft (11) located in the ventilation slot (47); a smoke exhaust pipe (49) is fixedly connected to the inner wall of the ventilation slot (47); and the other end of the smoke exhaust pipe (49) is connected to an external container for collecting smoke and dust.

9. The bicycle frame welding robot according to claim 6, characterized in that: in: The distance from the first fixing plate (24) to the center of the first fixing seat (21) is equal to the distance from the center of the slide cylinder (7) to the first rotating shaft (3), and the distance from the second fixing plate (33) to the center of the second fixing seat (29) is equal to the distance from the center of the second rotating shaft (11) to the center of the welding gun (9).

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