A plasma arc welding device that can automatically position bicycle parts

Abstract

The invention discloses a plasma arc welding device which is easy to automatically position bicycle accessories, relates to the technical field of bicycle accessory assembly, solves the problem that two clamping arms can only clamp and position a single model of bicycle frame, and the two straight rod-shaped clamping arms have poor stability in the process of clamping and welding irregular frame steel pipes. The invention comprises a base plate, and a welding gun is installed on the upper right side of the base plate. The invention also comprises a spherical seat installed on the upper side of the base plate, and two symmetrically distributed trays are hingedly installed on the outer side of the spherical seat, and the tightness of the hinge between the tray and the spherical seat is adjusted by bolts, and an embedded disk is rotatably installed inside the tray. The invention installs a driving motor, a clamping structure and an inflation structure, and since different amounts of gas can be filled into the interior of multiple sleeves, the clamping structure can be used to clamp bicycle accessories of different models and adapt to bicycle accessories of irregular shapes.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle accessory assembly, in particular to a plasma arc welding device which is easy to automatically position a bicycle accessory. Background Art

[0002] Plasma arc welding is a welding method that uses plasma arc as a heat source to melt the joints of two metals. It includes AC plasma arc welding, micro-beam plasma arc welding, reverse polarity plasma arc welding, pulse plasma arc welding, consumable plasma arc welding, etc. The advantages are that within a certain thickness range, the workpiece can be welded without grooves or gaps, single-sided welding and double-sided forming, and the arc is stable, the heat is concentrated, the heat-affected zone is small, the deformation is small, and the productivity is high.

[0003] During the assembly process of bicycle frames, plasma arc welding machines are required to be used for welding. One type of plasma arc welding machine on the market is to install multiple welding stations on a turntable, and each welding station is correspondingly installed with a clamping structure. The two clamping arms in the clamping structure are two straight rods. When the clamping structure rotates with the turntable, it can automatically clamp the workpiece during welding, and automatically release the workpiece to discharge the material after welding is completed. However, when the device is in use, the opening and closing angles of the two clamping arms are fixed and cannot be adjusted, resulting in the two clamping arms being able to clamp and position only a single model of bicycle frame, and for some bicycle frames with unique shapes, the shape of the frame steel pipe is irregular, resulting in the poor stability of the two straight rod-shaped clamping arms during the clamping and welding of the irregular frame steel pipe, which makes the device have great limitations during use. Summary of the invention

[0004] The object of the present invention is to provide a plasma arc welding device which is easy to automatically position bicycle accessories, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A plasma arc welding device that is easy to automatically position bicycle accessories comprises a base plate, a welding gun is installed on the upper right side of the base plate, and a spherical seat is installed on the upper side of the base plate, two symmetrically distributed trays are hingedly installed on the outer side of the spherical seat, and the tightness of the hinge between the tray and the spherical seat is adjusted by bolts, an embedded disk is rotatably installed inside the tray, and the tightness between the embedded disk and the tray is also adjusted by bolts, the upper end of the base plate is located at the rear side of the spherical seat and a support plate is fixedly installed, and a rotating shaft is rotatably installed on the support plate through a bearing; a clamping structure is used for automatically positioning and clamping bicycle accessories, and the two symmetrically distributed clamping structures are installed on the upper ends of the embedded disks; an inflatable structure is used to inflate the inside of the clamping structure, and the inflatable structure is installed on the upper side of the base plate and located between the spherical seat and the support plate; a positioning structure is used to position the inflatable structure, and the positioning structure is installed between the inflatable structure and the rotating shaft.

[0007] Preferably, the connection between the spherical seat and the rotating shaft is a fixed connection, and the clamping structure includes a fixed seat fixedly connected to the embedded disk, and the two fixed seats are fixedly embedded with a plurality of sleeves distributed at equal distances on the side away from each other, and a piston 1 that can move left and right is movably embedded inside the sleeve, and the piston 1 is made of rubber. A rectangular short rod is fixedly embedded in the center of one side of the piston 1 close to the fixed seat, and the connection between the rectangular short rod and the sleeve is a plug-in connection.

[0008] Preferably, a spring 1 is movably sleeved on the outer side of the rectangular short rod, and both ends of the spring 1 are movably abutted against the sleeve and the piston 1 respectively, an end of the rectangular short rod away from the piston 1 is fixedly connected to a fixing plate, a side of the fixing plate away from the rectangular short rod is fixedly embedded with a rubber pad, the rubber pad can increase the friction between the fixing plate and the bicycle accessory, an end of the sleeve away from the fixing seat is fixedly installed with a secondary pipe interconnected with it, and an end of the secondary pipe away from the sleeve is fixedly installed with a main pipe interconnected with it.

[0009] Preferably, the inflatable structure includes a sleeve fixedly embedded on the support plate, and the sleeve is located on the lower side of the rotating shaft, and a piston 2 that can move left and right is movably embedded inside the sleeve, and a rectangular long rod is fixedly embedded at the right center of the piston 2, and the connection between the rectangular long rod and the sleeve is a plug-in connection, the cross-sectional shape of the rectangular long rod is rectangular, which can prevent it from rotating inside the sleeve, and a plurality of grooves distributed at equal distances are opened on the upper end of the rectangular long rod.

[0010] Preferably, a guide rail is installed on the lower side of the rectangular long rod, and the guide rail is fixedly connected to the sleeve and the support plate respectively, a screw is rotatably installed inside the guide rail, and a slider is cooperated with the outer side of the screw. The rotation of the screw can drive the slider to move left and right, and the slider is in sliding contact with the guide rail, a push plate is fixedly embedded in the upper end of the slider, and the connection mode between the push plate and the groove is movably abutted, a pinion is fixedly connected to the left end of the screw, a side of the piston 2 away from the rectangular long rod is movably abutted with spring 2, an end of the spring 2 away from the piston 2 is movably abutted with a washer, and the connection mode between the washer and the sleeve is fixedly connected.

[0011] Preferably, a metal conduit interconnected with the left end of the sleeve is fixedly installed, and the end of the metal conduit away from the sleeve is fixedly connected to a rotating joint, and the side of the rotating joint away from the metal conduit is fixedly connected to a shunt conduit, and multiple ends of the shunt conduit are respectively connected to multiple main pipes, a driving motor is installed on the lower side of the guide rail, and the driving motor is fixedly connected to the support plate, a large gear is fixedly sleeved on the outer side of the driving shaft of the driving motor, and the connection between the large gear and the small gear is a meshing connection, and the driving motor can drive the small gear and the screw to rotate forward or reverse through the large gear.

[0012] Preferably, the positioning structure includes a positioning pin that is in sliding contact with the rectangular long rod through a plurality of grooves, the lower end of the positioning pin is provided with an inclined surface inclined to the right, and the inclined surface inclined to the right can reduce the friction resistance between the positioning pin and the rectangular long rod, the upper end of the positioning pin is fixedly connected with a spline gasket, the outer side of the spline gasket is movably sleeved with a connecting column, a spring three is installed inside the connecting column, and the two ends of the spring three are respectively movably abutted with the spline gasket and the connecting column, support seats are installed on the left and right sides of the connecting column, and the two support seats are respectively fixedly connected to the sleeve and the guide rail, the connecting column is rotatably connected to the guide rail through a positioning shaft, the outer side of the positioning shaft is fixedly sleeved with a coil spring, and the outer end of the coil spring is fixedly connected to the guide rail, the coil spring is conducive to driving the connecting column to rotate to a vertical state, the outer side of the connecting column is movably abutted with a shift rod, and the shift rod is fixedly connected to the rotating shaft.

[0013] Preferably, a synchronous wheel 1 is fixedly sleeved on the outer side of the driving shaft of the driving motor, and a synchronous wheel 2 is fixedly sleeved on the outer side of the rotating shaft, a synchronous belt is cooperatively installed on the outer sides of the synchronous wheel 1 and the synchronous wheel 2, and a tensioning structure is installed on the inner side of the synchronous belt between the synchronous wheel 1 and the synchronous wheel 2, and two symmetrically distributed support frames are fixedly installed on the outer side of the spherical seat, and the two support frames are respectively located on the upper and lower sides of the spherical seat, the support frames can support the spherical seat, and can effectively enhance the stability during welding, and a support rail is fixedly embedded at the upper end of the base plate corresponding to the support frame, and the lower end of the support frame is in rolling contact with the support rail through a roller.

[0014] Preferably, the tensioning structure includes a movable block that can move inside the support plate, a mounting shaft is fixedly embedded at the left center of the movable block, a tensioning wheel is rotatably installed on the outer side of the mounting shaft, and anti-drop plates are installed on the outer sides of synchronous wheel one, synchronous wheel two and tensioning wheel, which can prevent the synchronous belt from falling off, a connecting rod is fixedly embedded in the center of a side of the movable block away from the sleeve, a spring four is movably sleeved on the outer side of the connecting rod, and two ends of the spring four are movably abutted against the movable block and the support plate respectively, a toggle button is movably sleeved on one end of the connecting rod away from the movable block, and the toggle button is rotatably connected to the connecting rod via a connecting shaft, the connecting shaft is away from the center of the toggle button, and the connection method between the toggle button and the support plate is movably abutted.

[0015] Preferably, two symmetrically distributed embedding grooves are provided on the outer side of the rotating shaft, a positioning rod is fixedly embedded at the center of the upper end of the movable block, and the positioning rod is in the shape of a " ". The positioning rod is movably connected to the rotating shaft through the embedding groove, and the positioning rod inserted into the embedding groove can prevent the rotating shaft from rotating.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention installs a driving motor, a clamping structure and an inflation structure. The driving motor drives the screw in the inflation structure to rotate through a large gear and a small gear, so that the piston 2 moves left inside the sleeve, and can inflate the inside of multiple sleeves in the clamping structure. The gas drives the piston 1 to move so that the multiple rubber pads fit the outer wall of the bicycle accessories to clamp the bicycle accessories. Since different amounts of gas can be filled into the interior of the multiple sleeves, the clamping structure can not only clamp bicycle accessories of different models, but also adapt to bicycle accessories with irregular shapes.

[0018] 2. The present invention installs a synchronous wheel 1, a synchronous wheel 2, a synchronous belt and a tensioning structure. When the tensioning wheel in the tensioning structure makes the synchronous belt in a taut state, the driving motor drives the rotating shaft to rotate clockwise through the synchronous wheel 1, the synchronous wheel 2 and the synchronous belt, which is conducive to turning over the bicycle accessories and facilitating welding of the reverse side of the bicycle accessories. When the adjusting wheel in the tensioning structure moves to make the synchronous belt in a relaxed state, the positioning rod can be inserted into the embedding groove to prevent the rotating shaft from rotating, which can effectively enhance the stability during the welding process.

[0019] 3. The present invention installs a positioning structure, and the positioning pin in the positioning structure can automatically position the rectangular long rod through a plurality of grooves during the movement of the rectangular long rod, thereby ensuring the clamping state of the clamping structure on the bicycle accessories. When the double-sided welding of the bicycle accessories is completed, the positioning pin can be disengaged from the groove under the drive of the lever, thereby facilitating the clamping structure to automatically disengage from the clamping state of the bicycle accessories and facilitate rapid material discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the removal of the bottom plate and the spherical seat of the present invention;

[0022] Figure 3 For the present invention Figure 2 Schematic side section of

[0023] Figure 4 A side cross-sectional diagram of the support plate of the present invention

[0024] Figure 5 It is an overall schematic diagram of the inflatable structure of the present invention;

[0025] Figure 6 It is a schematic diagram of a side section of the inflatable structure of the present invention;

[0026] Figure 7 It is a side sectional schematic diagram of the clamping structure of the present invention;

[0027] Figure 8 The overall schematic diagram of the tensioning structure of the present invention is

[0028] Fig. 9 For the present invention Figure 6 A magnified schematic diagram of center A.

[0029] In the figure: 1, bottom plate; 2, spherical seat; 3, tray; 4, embedded disk; 5, clamping structure; 501, fixed seat; 502, sleeve; 503, piston 1; 504, rectangular short rod; 505, spring 1; 506, fixed plate; 507, rubber pad; 508, auxiliary pipe; 509, main pipe; 6, rotating shaft; 7, inflatable structure; 701, sleeve; 702, piston 2; 703, rectangular long rod; 704, groove; 705, guide rail; 706, screw; 707, slider; 708, push plate; 709, pinion; 710, spring 2; 711, washer; 712, metal conduit; 713, rotary joint ;714, shunt duct;8, positioning structure;801, positioning pin;802, spline gasket;803, connecting column;804, spring three;805, support seat;806, positioning shaft;807, coil spring;808, lever;9, tensioning structure;901, movable block;902, mounting shaft;903, tensioning wheel;904, connecting rod;905, spring four;906, dial button;907, connecting shaft;10, support rail;11, support frame;12, support plate;13, drive motor;14, large gear;15, synchronous wheel one;16, synchronous wheel two;17, synchronous belt;18, embedded groove;19, positioning rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1-Figure 7 The plasma arc welding device shown in the figure is easy to automatically position bicycle accessories, including a base plate 1, and a welding gun is installed on the upper right side of the base plate 1, and also includes a spherical seat 2 installed on the upper side of the base plate 1, and two trays 3 symmetrically distributed are hingedly installed on the outer side of the spherical seat 2, and the tightness of the hinge between the tray 3 and the spherical seat 2 is adjusted by bolts, and an embedded disk 4 is rotatably installed inside the tray 3, and the tightness between the embedded disk 4 and the tray 3 is also adjusted by bolts. The upper end of the base plate 1 is located at the spherical seat 2. A support plate 12 is fixedly installed on the rear side, and a rotating shaft 6 is rotatably installed on the support plate 12 through a bearing; a clamping structure 5 is used to automatically position and clamp the bicycle accessories, and two symmetrically distributed clamping structures 5 are installed at the upper end of the embedded disk 4; an inflatable structure 7 is used to inflate the inside of the clamping structure 5, and the inflatable structure 7 is installed on the upper side of the base plate 1 and is located between the spherical seat 2 and the support plate 12; a positioning structure 8 is used to position the inflatable structure 7, and the positioning structure 8 is installed between the inflatable structure 7 and the rotating shaft 6.

[0032] The connection between the spherical seat 2 and the rotating shaft 6 is a fixed connection. The clamping structure 5 includes a fixed seat 501 fixedly connected to the embedded disk 4. The two fixed seats 501 are fixedly embedded with multiple sleeves 502 distributed at equal distances on the side away from each other. A piston 503 that can move left and right is movably embedded inside the sleeve 502. The piston 503 is made of rubber. A rectangular short rod 504 is fixedly embedded in the center of one side of the piston 503 close to the fixed seat 501, and the connection between the rectangular short rod 504 and the sleeve 502 is a plug-in connection.

[0033] A spring 505 is movably sleeved on the outer side of the rectangular short rod 504, and the two ends of the spring 505 are movably abutted against the sleeve 502 and the piston 503 respectively. The end of the rectangular short rod 504 away from the piston 503 is fixedly connected to a fixing plate 506, and a rubber pad 507 is fixedly embedded on the side of the fixing plate 506 away from the rectangular short rod 504. The rubber pad 507 can increase the friction between the fixing plate 506 and the bicycle accessory. The end of the sleeve 502 away from the fixing seat 501 is fixedly installed with a secondary pipe 508 interconnected with it, and the end of the secondary pipe 508 away from the sleeve 502 is fixedly installed with a main pipe 509 interconnected with it.

[0034] The inflatable structure 7 includes a sleeve 701 fixedly embedded on the support plate 12, and the sleeve 701 is located on the lower side of the rotating shaft 6. A piston 2 702 that can move left and right is movably embedded inside the sleeve 701. A rectangular long rod 703 is fixedly embedded at the right center of the piston 2 702. The connection method between the rectangular long rod 703 and the sleeve 701 is a plug-in connection. The cross-sectional shape of the rectangular long rod 703 is rectangular, which can prevent it from rotating inside the sleeve 701. A plurality of grooves 704 distributed at equal distances are opened at the upper end of the rectangular long rod 703.

[0035] A guide rail 705 is installed on the lower side of the rectangular long rod 703, and the guide rail 705 is fixedly connected to the sleeve 701 and the support plate 12 respectively, a screw 706 is rotatably installed inside the guide rail 705, and a slider 707 is installed on the outer side of the screw 706. The rotation of the screw 706 can drive the slider 707 to move left and right, and the slider 707 is in sliding contact with the guide rail 705, and a push plate 708 is fixedly embedded on the upper end of the slider 707, and the connection between the push plate 708 and the groove 704 is a movable abutment, and a pinion 709 is fixedly connected to the left end of the screw 706. The side of the piston 2 702 away from the rectangular long rod 703 is movably abutted with a spring 2 710, and the end of the spring 2 710 away from the piston 2 702 is movably abutted with a gasket 711, and the connection between the gasket 711 and the sleeve 701 is a fixed connection.

[0036] A metal conduit 712 is fixedly installed on the left end of the sleeve 701 and is interconnected with the metal conduit 712. A rotating joint 713 is fixedly connected to the end of the metal conduit 712 away from the sleeve 701. A shunt conduit 714 is fixedly connected to the side of the rotating joint 713 away from the metal conduit 712, and multiple ends of the shunt conduit 714 are respectively connected to multiple main pipes 509. A driving motor 13 is installed on the lower side of the guide rail 705, and the driving motor 13 is fixedly connected to the support plate 12. A large gear 14 is fixedly sleeved on the outer side of the driving shaft of the driving motor 13, and the connection between the large gear 14 and the small gear 709 is a meshing connection. The driving motor 13 can drive the small gear 709 and the screw 706 to rotate forward or reverse through the large gear 14.

[0037] Two symmetrically distributed embedding grooves 18 are provided on the outer side of the rotating shaft 6. A positioning rod 19 is fixedly embedded at the center of the upper end of the movable block 901, and the shape of the positioning rod 19 is "7" shape. The positioning rod 19 is movably connected to the rotating shaft 6 through the embedding groove 18. The positioning rod 19 inserted into the embedding groove 18 can prevent the rotating shaft 6 from rotating.

[0038] Working principle: Before plasma arc welding of bicycle frame accessories, personnel first place the accessories between the two clamping structures 5 on the embedded plate 4, and align the welding parts of the accessories. Then personnel control the driving motor 13 to operate. The driving motor 13 drives the screw 706 to rotate through the large gear 14 and the small gear 709. The screw 706 rotates to drive the slider 707 to move left. In the process of moving to the left, the slider 707 drives the rectangular long rod 703 and the piston 2 702 to move left through the push plate 708. The second piston 702 moves to the left to send the gas inside the sleeve 701 into each sleeve 502 through each pipeline. The first piston 503 in the sleeve 502 moves inside the sleeve 502 under the action of the gas pressure until the rubber pad 507 fits the outer wall of the bicycle accessory. Since the multiple sleeves 502 are interconnected, different amounts of gas can be filled into the multiple sleeves 502, which is beneficial for the clamping structure 5 to clamp different types of bicycle accessories and also beneficial for clamping and positioning irregularly shaped bicycle accessories.

[0039] After the bicycle accessories are positioned and clamped, the welding gun located on the upper right side of the bottom plate 1 moves to automatically weld the connection of the bicycle accessories.

[0040] Example 2: Please refer to Figure 2 , Figure 8, this embodiment further explains the first embodiment, the outer side of the driving shaft of the driving motor 13 is also fixedly sleeved with a synchronous wheel 15, the outer side of the rotating shaft 6 is fixedly sleeved with a synchronous wheel 2 16, the outer sides of the synchronous wheels 15 and 16 are matched with a synchronous belt 17, the inner side of the synchronous belt 17 is located between the synchronous wheels 15 and 16 and a tensioning structure 9 is installed, two symmetrically distributed support frames 11 are fixedly installed on the outer side of the spherical seat 2, and the two support frames 11 are respectively located on the upper and lower sides of the spherical seat 2, the support frames 11 can support the spherical seat 2, and can effectively enhance the stability during welding, the upper end of the base plate 1 corresponds to the support frame 11 and is fixedly embedded with a support rail 10, and the lower end of the support frame 11 is in rolling contact with the support rail 10 through a roller.

[0041] The tensioning structure 9 includes a movable block 901 that can move inside the support plate 12, a mounting shaft 902 is fixedly embedded at the left center of the movable block 901, a tensioning wheel 903 is rotatably installed on the outer side of the mounting shaft 902, and anti-slip plates are installed on the outer sides of the synchronous wheel 15, the synchronous wheel 2 16 and the tensioning wheel 903 to prevent the synchronous belt 17 from falling off, a connecting rod 904 is fixedly embedded at the center of the side of the movable block 901 away from the sleeve 701, a spring four 905 is movably sleeved on the outer side of the connecting rod 904, and the two ends of the spring four 905 are movably abutted against the movable block 901 and the support plate 12 respectively, a toggle button 906 is movably sleeved on the end of the connecting rod 904 away from the movable block 901, and the toggle button 906 is rotatably connected to the connecting rod 904 through a connecting shaft 907, the connecting shaft 907 is away from the center of the toggle button 906, and the connection method between the toggle button 906 and the support plate 12 is movably abutted.

[0042] In this embodiment, after the welding gun has finished welding the upper side of the bicycle accessory, the personnel rotates the dial button 906 to make it perpendicular to the support plate 12. Since the connecting shaft 907 is away from the center of the dial button 906, when the dial button 906 is rotated to a state perpendicular to the support plate 12, the dial button 906 will drive the connecting shaft 907 away from the support plate 12, and the movable block 901 will drive the tension wheel 903 to move forward. After the tension wheel 903 moves forward, the synchronous belt 17 is in a taut state. At this time, the driving motor 13 drives the synchronous wheel 15 and the synchronous wheel 17 to move forward. The second 16 and the synchronous belt 17 drive the rotating shaft 6 to rotate 180° clockwise to turn over the bicycle accessories, which is beneficial for double-sided welding of the bicycle accessories. Since the synchronous belt 17 is in a taut state at this time, the rotating shaft 6 can be locked under the self-locking performance of the driving motor 13 to prevent the rotating shaft 6 from rotating, thereby enhancing the stability of the bicycle parts during the reverse welding process. When the reverse welding of the bicycle accessories is completed, the driving motor 13 drives the rotating shaft 6 to rotate 180° clockwise again, so that the bicycle accessories are located on the upper side of the embedded plate 4, which is convenient for discharging.

[0043] After the dial button 906 is turned, the connecting shaft 907 will approach the supporting plate 12, and the movable block 901 will drive the tensioning wheel 903 to move backward. At this time, the synchronous belt 17 will be in a relaxed state, and the positioning rod 19 will also move backward with the movable block 901. After the positioning rod 19 moves backward, it will be inserted into the embedded groove 18, which can prevent the rotating shaft 6 from rotating, and can effectively enhance the stability of the bicycle during the front welding process;

[0044] Example 3: Please refer to Figure 6 , Fig. 9 , this embodiment further illustrates the second embodiment, the positioning structure 8 includes a positioning pin 801 that is in sliding contact with the rectangular long rod 703 through a plurality of grooves 704, the lower end of the positioning pin 801 is provided with an inclined surface inclined to the right, and the inclined surface inclined to the right can reduce the friction resistance between the positioning pin 801 and the rectangular long rod 703, the upper end of the positioning pin 801 is fixedly connected with a spline gasket 802, the outer side of the spline gasket 802 is movably sleeved with a connecting column 803, the interior of the connecting column 803 is installed with a spring three 804, and the two ends of the spring three 804 are respectively connected with the spline gasket 8 02 and the connecting column 803 are movably abutted, support seats 805 are installed on the left and right sides of the connecting column 803, and the two support seats 805 are fixedly connected to the sleeve 701 and the guide rail 705 respectively, the connecting column 803 is rotatably connected to the guide rail 705 through the positioning shaft 806, the outer side of the positioning shaft 806 is fixedly sleeved with a coil spring 807, and the outer end of the coil spring 807 is fixedly connected to the guide rail 705, the coil spring 807 is conducive to driving the connecting column 803 to rotate to a vertical state, the outer side of the connecting column 803 is movably abutted with a lever 808, and the lever 808 is fixedly connected to the rotating shaft 6.

[0045] In this embodiment: when the rectangular long rod 703 moves to the left, the positioning pin 801 slides in contact with the rectangular long rod 703 through the inclined surface and the plurality of grooves 704. When the push plate 708 separates from the rectangular long rod 703 and moves to the right, the positioning pin 801 can position the rectangular long rod 703 through the grooves 704, thereby preventing the rectangular long rod 703 from moving to the right under the drive of the second spring 710, preventing the gas inside the sleeve 502 from flowing back into the sleeve 701, and ensuring the clamping state of the clamping structure 5 on the bicycle accessory;

[0046] After the drive motor 13 drives the rotating shaft 6 to rotate 180° clockwise through the synchronous wheel 15, the synchronous wheel 2 16 and the synchronous belt 17, the lever 808 will rotate with the rotating shaft 6. At this time, the lever 808 is located on the upper side of the rotating shaft 6. When the reverse side welding of the bicycle accessories is completed, the personnel rotates the dial button 906 to relax the synchronous belt 17. The personnel controls the drive motor 13 to continue to drive the screw rod 706 to rotate counterclockwise through the large gear 14 and the small gear 709 until the push plate 708 moves to the right, so that the distance between the slider 707 and the rectangular long rod 703 exceeds the reset length of the rectangular long rod 703. After that, the personnel rotates the dial button 906 to tighten the synchronous belt 17. The drive motor 13 drives the rotating shaft 6 to rotate 180° clockwise again. At this time, in the process of the lever 808 rotating with the rotating shaft 6, the lever 808 will abut against the upper end of the connecting column 803 and drive The movable connecting column 803 rotates, and after the connecting column 803 rotates, it drives the positioning pin 801 to rotate and disengage from the groove 704. At this time, the piston 1 503 and the piston 2 702 move back under the drive of the spring 1 505 and the spring 2 710 respectively. At this time, the clamping structure 5 will be out of the clamping state of the bicycle accessory (in order to ensure that the piston 2 702 can completely move back and reset after the positioning pin 801 is separated from the groove 704, the drive motor 13 can be designed to have a pause at this time. After the pause, the two trays 3 and the bicycle accessory are in an inclined state. Even if the clamping structure 5 will be out of the clamping state of the bicycle accessory, the font bicycle accessory will not fall off. The bicycle accessory can be directly discharged at this time, which effectively improves the discharge speed of the bicycle accessory welding. After the piston 1 503 and the piston 2 702 are completely reset, the drive motor 13 drives the rotating shaft 6 to rotate to make the tray 3 horizontal).

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plasma arc welding device that can easily automatically position bicycle accessories, comprising a base plate (1), wherein a welding gun is mounted on the upper right side of the base plate (1), characterized in that: Also includes: A spherical seat (2) is mounted on the upper side of the base plate (1), two trays (3) symmetrically distributed are hingedly mounted on the outer side of the spherical seat (2), and the tightness of the hinge between the tray (3) and the spherical seat (2) is adjusted by bolts, an embedded disk (4) is rotatably mounted inside the tray (3), and the tightness between the embedded disk (4) and the tray (3) is also adjusted by bolts, and a support plate (12) is fixedly mounted on the upper end of the base plate (1) at the rear side of the spherical seat (2), and a rotating shaft (6) is rotatably mounted on the support plate (12) via a bearing; A clamping structure (5) for automatically positioning and clamping bicycle accessories, wherein two symmetrically distributed clamping structures (5) are mounted on the upper end of the embedded plate (4); An inflatable structure (7) used for inflating air into the interior of the clamping structure (5), the inflatable structure (7) being mounted on the upper side of the base plate (1) and located between the spherical seat (2) and the support plate (12); A positioning structure (8) for positioning the inflatable structure (7), the positioning structure (8) being installed between the inflatable structure (7) and the rotating shaft (6); The connection between the spherical seat (2) and the rotating shaft (6) is a fixed connection, the clamping structure (5) comprises a fixed seat (501) fixedly connected to the embedded disk (4), a plurality of sleeves (502) distributed at equal distances are fixedly embedded on the side of the two fixed seats (501) away from each other, a piston (503) that can move left and right is movably embedded inside the sleeve (502), a rectangular short rod (504) is fixedly embedded in the center of a side of the piston (503) close to the fixed seat (501), and the connection between the rectangular short rod (504) and the sleeve (502) is a plug-in connection; A spring (505) is movably sleeved on the outer side of the rectangular short rod (504), and two ends of the spring (505) are movably abutted against the sleeve (502) and the piston (503) respectively; one end of the rectangular short rod (504) away from the piston (503) is fixedly connected to a fixing plate (506); a rubber pad (507) is fixedly embedded on a side of the fixing plate (506) away from the rectangular short rod (504); an auxiliary pipe (508) in communication with the sleeve (502) is fixedly installed on one end away from the fixing seat (501); and a main pipe (509) in communication with the sleeve (502) is fixedly installed on one end of the auxiliary pipe (508) away from the sleeve (502); The inflatable structure (7) comprises a sleeve (701) fixedly embedded on the support plate (12), and the sleeve (701) is located at the lower side of the rotating shaft (6), a second piston (702) that can move left and right is movably embedded inside the sleeve (701), a rectangular long rod (703) is fixedly embedded at the right center of the second piston (702), and the connection between the rectangular long rod (703) and the sleeve (701) is a plug-in connection, and a plurality of grooves (704) distributed at equal distances are formed at the upper end of the rectangular long rod (703); A guide rail (705) is installed on the lower side of the rectangular long rod (703), and the guide rail (705) is fixedly connected to the sleeve (701) and the support plate (12) respectively. A screw rod (706) is rotatably installed inside the guide rail (705), and a slider (707) is installed on the outer side of the screw rod (706), and the slider (707) is in sliding contact with the guide rail (705). A push plate (708) is fixedly embedded on the upper end of the slider (707), and the push plate (708) is fixedly embedded on the upper end of the slider (707). The plate (708) and the groove (704) are connected in a movable abutment manner, the left end of the screw rod (706) is fixedly connected with a pinion (709), the side of the second piston (702) away from the rectangular long rod (703) is movably abutted with a second spring (710), the end of the second spring (710) away from the second piston (702) is movably abutted with a washer (711), and the washer (711) and the sleeve (701) are connected in a fixed manner; A metal conduit (712) is fixedly mounted on the left end of the sleeve (701) and is in communication with the metal conduit. A rotating joint (713) is fixedly connected to one end of the metal conduit (712) away from the sleeve (701). A shunt conduit (714) is fixedly connected to one side of the swivel joint (713) away from the metal conduit (712). The multiple ends of the shunt conduit (714) are respectively in communication with multiple main pipes (509). A driving motor (13) is mounted on the lower side of the guide rail (705). The driving motor (13) is fixedly connected to the support plate (12). A large gear (14) is fixedly sleeved on the outer side of the driving shaft of the driving motor (13). The large gear (14) and the small gear (709) are connected in a meshing manner.

2. The plasma arc welding device for automatically positioning bicycle parts according to claim 1, characterized in that: The positioning structure (8) comprises a positioning pin (801) which is in sliding contact with the rectangular long rod (703) through a plurality of the grooves (704); the lower end of the positioning pin (801) is provided with an inclined surface inclined to the right; the upper end of the positioning pin (801) is fixedly connected with a spline gasket (802); the outer side of the spline gasket (802) is movably sleeved with a connecting column (803); a spring three (804) is installed inside the connecting column (803); and the two ends of the spring three (804) are movably abutted against the spline gasket (802) and the connecting column (803) respectively; Support seats (805) are installed on both left and right sides of the connecting column (803), and the two support seats (805) are fixedly connected to the sleeve (701) and the guide rail (705) respectively. The connecting column (803) is rotatably connected to the guide rail (705) via a positioning shaft (806). A coil spring (807) is fixedly sleeved on the outer side of the positioning shaft (806), and the outer end of the coil spring (807) is fixedly connected to the guide rail (705). A lever (808) is movably abutted on the outer side of the connecting column (803), and the lever (808) is fixedly connected to the rotating shaft (6).

3. The plasma arc welding device for automatically positioning bicycle parts according to claim 1, characterized in that: The outer side of the driving shaft of the driving motor (13) is also fixedly sleeved with a synchronous wheel 1 (15), the outer side of the rotating shaft (6) is fixedly sleeved with a synchronous wheel 2 (16), the outer sides of the synchronous wheel 1 (15) and the synchronous wheel 2 (16) are matched with a synchronous belt (17), the inner side of the synchronous belt (17) is provided with a tensioning structure (9) between the synchronous wheel 1 (15) and the synchronous wheel 2 (16), the outer side of the spherical seat (2) is fixedly provided with two symmetrically distributed support frames (11), and the two support frames (11) are respectively located on the upper and lower sides of the spherical seat (2), the upper end of the bottom plate (1) is fixedly embedded with a support rail (10) corresponding to the support frame (11), and the lower end of the support frame (11) is in rolling contact with the support rail (10) through a roller.

4. The plasma arc welding device for automatically positioning bicycle parts according to claim 3 is characterized in that: The tensioning structure (9) comprises a movable block (901) that can move inside the support plate (12), a mounting shaft (902) is fixedly embedded at the center of the left side of the movable block (901), a tensioning wheel (903) is rotatably mounted on the outer side of the mounting shaft (902), a connecting rod (904) is fixedly embedded at the center of a side of the movable block (901) away from the sleeve (701), a spring four (905) is movably sleeved on the outer side of the connecting rod (904), and the spring four The two ends of (905) are respectively movably abutted against the movable block (901) and the support plate (12); one end of the connecting rod (904) away from the movable block (901) is movably sleeved with a dial button (906); and the dial button (906) is rotatably connected to the connecting rod (904) via a connecting shaft (907); the connecting shaft (907) is away from the center of the dial button (906); and the connection between the dial button (906) and the support plate (12) is movably abutted.

5. The plasma arc welding device for automatically positioning bicycle parts according to claim 4, characterized in that: Two symmetrically distributed embedding grooves (18) are provided on the outer side of the rotating shaft (6); a positioning rod (19) is fixedly embedded at the center of the upper end of the movable block (901); the positioning rod (19) is in the shape of a "7"; and the positioning rod (19) is movably plugged into the rotating shaft (6) through the embedding grooves (18).

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