Adjustable welding equipment for semitrailer chassis supporting legs

Abstract

The adjustable welding equipment comprises storage bins and a welding table, connecting frames are fixedly connected to the two ends of each storage bin, the storage bins are fixedly connected to the two sides of the vertical center line of the welding table, after outer legs of the supporting legs are placed on the welding table, a worker treads a pedal downwards with the feet, and the outer legs of the supporting legs are welded to the welding table. After the pedal is treaded, the supporting leg connecting plates can be moved out of the inner side of the storage bin firstly, and then the supporting leg connecting plates on the two sides are fixed to the two sides of the supporting leg outer leg at the same time under the action of the first guide plate and the second guide plate. A worker only needs to step on the pedal with feet to quickly complete quick attachment and fixation of the outer leg of the supporting leg and the supporting leg connecting plates on the two sides, the worker does not need to independently attach and fix the supporting leg connecting plates on the two sides and the outer leg of the supporting leg together, operation is easy, use of the worker is facilitated, and therefore the overall welding efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of leg welding, and in particular to an adjustable welding device for a semitrailer chassis leg. Background Art

[0002] Semi-trailer is a widely used means of transport in the modern transportation industry. When the semi-trailer is driving, its front end can be connected to the tractor to be supported and towed by it. When not driving, the front end of the semi-trailer can be detached from the tractor. In order to support the front end of the semi-trailer after towing, a supporting device is provided at the bottom of the front end of the semi-trailer.

[0003] When making the outrigger, it is necessary to weld the outer leg of the outrigger and the connecting plate of the outrigger together. During the welding process, the staff needs to first fix the connecting plate on both sides of the outrigger. The currently commonly used fixing method is to fix the outer leg on the welding equipment, and then the staff place the outrigger on both sides of the outer leg respectively, and then fix the outer leg and the connecting plate, and then weld with a welding gun. This method requires the staff to frequently take the connecting plate, and the connecting plates on both sides of the outer leg need to be fixed separately twice, which is cumbersome to operate. After the outer leg is placed on the welding equipment, the connecting plates on both sides cannot be fixed on both sides of the outer leg at the same time, resulting in reduced welding efficiency of the outrigger, which is not suitable for mass production and welding of the outrigger. Therefore, in view of the above problems, an adjustable welding device for semi-trailer chassis outrigger is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is: An adjustable welding device for the chassis legs of a semitrailer comprises a material storage bin and a welding platform, wherein the four corners of the bottom end of the material storage bin are fixedly connected to bin legs, both ends of the material storage bin are fixedly connected to connecting frames, both sides of the vertical center line of the welding platform are fixedly connected to material storage bins, and the top surface of the material storage bin is flush with the top surface of the welding platform, the inner sides of the two material storage bins are symmetrically placed with leg connecting plates about the vertical center line of the welding platform, the top of the welding platform is placed with a leg outer leg, the top of the welding platform is fixedly connected to a baffle, both ends of the baffle are fixedly connected to a first guide plate, a fixed seat is provided on one side of the material storage bin, one end of the fixed seat is fixedly connected to a cross bar, the cross bar is fixedly connected to the bin legs, the inner side of the fixed seat is fixedly connected to a guide rail, the outer side of the guide rail is slidably connected to a pedal, and the pedal is slidably connected to the fixed seat, the One end of the pedal is fixedly connected to a first pull rope, the other end of the first pull rope is fixedly connected to an L-shaped plate, one end of the L-shaped plate is fixedly connected to a connecting rod, one end of the connecting rod is fixedly connected to a second pull rope, the other end of the second pull rope is fixedly connected to a horizontal adjustment mechanism, one end of the horizontal adjustment mechanism is fixedly connected to a second guide plate, the bottom end of the horizontal adjustment mechanism is provided with a guide mechanism, teeth are provided on both sides of the vertical center line of the connecting rod, one end of the teeth is meshed with a gear, a one-way positioning mechanism is provided on the inner side of the gear, a deep groove ball bearing is fixedly connected to the inner side of the deep groove ball bearing, a first screw is fixedly connected to the inner side of the deep groove ball bearing, and the first screw is rotatably connected to the connecting frame, a transition mechanism is provided on the outer side of the first screw, one end of the transition mechanism is fixedly connected to a supporting plate, and the supporting plate is slidably connected to the storage bin.

[0006] Preferably, the one-way positioning mechanism includes a ratchet fixedly connected to the first screw, and the ratchet rotates clockwise from top to bottom, a pawl is provided at one end of the ratchet, and the pawl is rotationally connected to the gear, and a first spring is fixedly connected to one end of the pawl, and the first spring is fixedly connected to the gear.

[0007] Preferably, the transition mechanism includes a transition plate slidably connected to the first screw, the transition plate is slidably connected to the connecting frame, the transition plate is fixedly connected to the supporting plate, the outer side of the first screw is spirally connected with a first half-threaded cylinder and a second half-threaded cylinder, and a connecting assembly is provided at one end of the first half-threaded cylinder and the second half-threaded cylinder.

[0008] Preferably, the connecting assembly includes a side plate to which the first half-threaded cylinder and the second half-threaded cylinder are fixedly connected, the inner side of the side plate is spirally connected to the second screw, both sides of the second screw are rotatably connected to movable plates, and the movable plate is slidably connected to the transition plate, one end of the movable plate is fitted with a second locking screw, and the second locking screw is spirally connected to the transition plate.

[0009] Preferably, the guide mechanism includes a guide shaft fixedly connected to the welding table, a linear bearing is slidably connected to the outer side of the guide shaft, a slider is fixedly connected to the outer side of the linear bearing, the slider is fixedly connected to the horizontal adjustment mechanism, a cross plate is provided on the outer side of the guide shaft, and the cross plate is fixedly connected to the welding table, the cross plate is slidably connected to the second pull rope, one end of the cross plate is fixedly connected to the second spring, and the other end of the second spring is fixedly connected to the horizontal adjustment mechanism.

[0010] Preferably, the horizontal adjustment mechanism includes a connecting seat fixedly connected to the slider, a square rod fixedly connected to the inner side of the connecting seat, a movable plate slidably connected to the outer side of the square rod, and the movable plate is fixedly connected to the second guide plate, the movable plate is slidably connected to the connecting seat, a first locking screw is spirally connected to the inner side of one end of the movable plate, and the first locking screw is in contact with the square rod.

[0011] Preferably, one end of the welding table is fixedly connected to the second fixed plate, one end of the connecting frame located on one side of the storage bin is fixedly connected to the first fixed plate, one end of the first fixed plate and the second fixed plate are respectively rotatably connected to the third guide roller and the fourth guide roller, and the second pull rope passes through the third guide roller and the fourth guide roller in sequence.

[0012] Preferably, the inner side of the fixed seat is rotatably connected with the first guide roller and the second guide roller in an upper and lower distribution, and the first pull rope passes through the first guide roller and the second guide roller in sequence, and the outer side of the first pull rope is slidably connected with a guide block, and the guide block is fixedly connected to the storage bin.

[0013] Preferably, the outer side of the connecting rod is slidably connected to a limit plate, and the limit plate is fixedly connected to the storage bin.

[0014] Preferably, a through hole for the connecting rod to pass through is opened on the inner side of one end of the fixing seat, and a protective cover is fixedly connected to the through hole of the fixing seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. An adjustable welding device for a semi-trailer chassis leg, by means of a storage bin, a pedal, a first guide plate, and a second guide plate, a leg connecting plate storage bin is respectively arranged on both sides of a welding table. When the outer leg of the leg is placed on the welding table, the worker steps on the pedal downward with his foot. After stepping on the pedal, the leg connecting plate will first move out from the inner side of the storage bin, and then, under the action of the first guide plate and the second guide plate, the leg connecting plates on both sides are simultaneously fixed to both sides of the outer leg of the leg. In the above manner, after the outer leg of the leg is placed on the welding table, the worker only needs to step on the pedal to quickly complete the fast fitting and fixing of the outer leg of the leg and the leg connecting plates on both sides. The worker does not need to fit and fix the leg connecting plates on both sides to the outer leg of the leg separately. The operation is simple and convenient for the worker to use, thereby improving the overall welding efficiency.

[0016] 2. An adjustable welding device for a semi-trailer chassis leg, which has a transition plate, a second locking screw and a supporting plate. Since the thickness of the leg connecting plates is different and the distance the supporting plate moves upward after the pedal is stepped on is certain, in order to ensure that the bottom of the leg connecting plate at the top of the supporting plate can be in the same plane with the top surface of the storage bin after the pedal is stepped on, the position between the transition plate and the first half threaded cylinder and the second half threaded cylinder can be adjusted to change the position of the supporting plate in the vertical direction, thereby meeting the use of leg connecting plates of different thicknesses, thereby improving the applicability of the device.

[0017] 3. An adjustable welding device for a semi-trailer chassis leg, which is provided with a connecting seat, a square rod, a movable plate, and a second guide plate; since the lengths of the leg connecting plates are different and the horizontal movement distance of the second guide plate after stepping on the pedal is certain, in order to ensure that the second guide plate can push the leg connecting plates of different lengths to the side of the outer leg of the leg, the movable plate can move the second guide plate in the horizontal direction, so that the second guide plate is in a suitable position, ensuring that the second guide plate can push the leg connecting plate to move normally, thereby meeting the use of leg connecting plates of different lengths, thereby further improving the applicability of the device.

[0018] 4. An adjustable welding device for a semi-trailer chassis leg, which is provided with a gear, a deep groove ball bearing, a ratchet, a first screw, a pawl, and a first spring; by providing a ratchet and a pawl on the inner side of the gear, it can be ensured that when the pedal is stepped down, the gear can rotate with the ratchet and the first screw through the pawl, so that the support plate and the leg connecting plate can move normally in the vertical direction, and when the pedal returns upward, it is ensured that the gear will not rotate with the ratchet and the first screw.

[0019] 5. An adjustable welding device for a semi-trailer chassis leg. By setting a first half-threaded barrel, a second half-threaded barrel, a side plate, a fixed block, and a second screw, when it is necessary to move a supporting plate from the top to the bottom of a storage bin, the first half-threaded barrel is separated from the second half-threaded barrel to ensure that the transition plate can move downward with the supporting plate. At the same time, after the first half-threaded barrel and the second half-threaded barrel are fitted together, the inner thread is adapted to the spiral on the surface of the first screw to ensure that the first screw can move in the vertical direction with the first half-threaded barrel and the second half-threaded barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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.

[0021] Figure 1 The present invention is a schematic diagram of the overall structure of an adjustable welding device for a semi-trailer chassis leg.

[0022] Figure 2 The present invention is a schematic diagram of the inner structure of a storage bin of an adjustable welding device for a semitrailer chassis leg.

[0023] Figure 3 The present invention is a schematic diagram of the installation structure of the toothed portion of an adjustable welding device for a semitrailer chassis leg.

[0024] Figure 4 The present invention is a schematic diagram of the installation structure of a slider of an adjustable welding device for a semitrailer chassis leg.

[0025] Figure 5 The present invention is a schematic diagram of the installation structure of a second spring of an adjustable welding device for a semitrailer chassis leg.

[0026] Figure 6 The present invention is a schematic diagram of the installation structure of a transition plate of an adjustable welding device for a semitrailer chassis leg.

[0027] Figure 7 The present invention is a schematic diagram of an enlarged installation structure of a second screw rod of an adjustable welding device for a semitrailer chassis leg.

[0028] Figure 8 The present invention is a schematic diagram of the installation structure of a ratchet of an adjustable welding device for a semitrailer chassis leg.

[0029] Fig. 9The present invention is a schematic diagram of the installation structure of a second guide plate of an adjustable welding device for a semitrailer chassis leg.

[0030] Fig.10 The present invention is a schematic diagram of the installation structure of a protective cover of an adjustable welding device for a semitrailer chassis leg.

[0031] In the figure: 1, storage bin; 2, bin legs; 3, welding table; 4, baffle; 5, first guide plate; 6, cross bar; 7, fixed seat; 8, protective cover; 9, pedal; 10, first guide roller; 11, second guide roller; 12, first pull rope; 13, connecting rod; 14, gear; 15, deep groove ball bearing; 16, ratchet; 17, first screw; 18, pawl; 19, first spring; 20, tooth part; 21, connecting frame; 22, limit plate; 23, guide block; 24, L-shaped plate; 25, first fixed plate; 26, third guide roller; 27, second pull rope Rope; 28. Fourth guide roller; 29. ​​Second fixed plate; 30. Cross plate; 31. Guide shaft; 32. Second spring; 33. Slider; 34. Linear bearing; 35. Connecting seat; 36. Square rod; 37. Moving plate; 38. Second guide plate; 39. First locking screw; 40. Transition plate; 41. Second locking screw; 42. Guide rail; 43. Support plate; 44. Leg connecting plate; 45. Leg outer leg; 46. First half threaded cylinder; 47. Second half threaded cylinder; 48. Side plate; 49. Movable plate; 50. Second screw; 51. Through hole. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with specific embodiments, wherein the accompanying drawings are only used for exemplary descriptions and represent only schematic diagrams rather than actual drawings, and should not be understood as limitations on this patent. In order to better illustrate the specific embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted. Based on the specific embodiments of the present invention, all other specific embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, which are 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The present invention is further explained below in conjunction with specific implementation methods.

[0034] Example like Figure 1-10As shown, an adjustable welding device for the chassis legs of a semitrailer comprises a storage bin 1 and a welding platform 3, wherein the four corners of the bottom end of the storage bin 1 are fixedly connected with bin legs 2, the storage bin 1 can be supported by the bin back 2 to ensure the stability of the storage bin 1 during operation, both ends of the storage bin 1 are fixedly connected with connection frames 21, the storage bins 1 are fixedly connected on both sides of the vertical center line of the welding platform 3, and the top surface of the storage bin 1 is flush with the top surface of the welding platform 3, the inner sides of the two storage bins 1 are symmetrically provided with support leg connecting plates 44 about the vertical center line of the welding platform 3, and the top of the welding platform 3 is provided with support leg outer legs 45, and the symmetrical placement of the support connecting plates 44 facilitates the subsequent support leg connecting plates 44 to be simultaneously fixed on both sides of the support outer legs 45 for welding. The top of the connecting platform 3 is fixedly connected with a baffle plate 4, and both ends of the baffle plate 4 are fixedly connected with a first guide plate 5. The baffle plate 4 and the first guide plate 5 can limit and fix the ends of the outer leg 45 of the leg and the end of the leg connecting plate 44 to ensure that the end of the outer leg 45 of the leg can be quickly aligned with the end of the leg connecting plate 44, thereby ensuring the quality of welding and improving the efficiency of work. A fixed seat 7 is provided on one side of the storage bin 1, and one end of the fixed seat 7 is fixedly connected with a cross bar 6, and the cross bar 6 is fixedly connected to the bin leg 2. The inner side of the fixed seat 7 is fixedly connected with a guide rail 42, and the outer side of the guide rail 42 is slidably connected with a pedal 9, and the pedal 9 is slidably connected to the fixed seat 7. The guide rail 42 plays a guiding and limiting role on the pedal 9 to ensure the normal operation of the pedal 9. One end of the pedal 9 A first pull rope 12 is fixedly connected, and the other end of the first pull rope 12 is fixedly connected to an L-shaped plate 24, one end of the L-shaped plate 24 is fixedly connected to a connecting rod 13, one end of the connecting rod 13 is fixedly connected to a second pull rope 27, and the other end of the second pull rope 27 is fixedly connected to a horizontal adjustment mechanism. After the pedal 9 is stepped on, it will move with the first pull rope 12, and then the first pull rope 12 moves in the horizontal direction with the connecting rod 13 through the L-shaped plate 24. One end of the horizontal adjustment mechanism is fixedly connected to a second guide plate 38, and a guide mechanism is provided at the bottom end of the horizontal adjustment mechanism. Toothed portions 20 are provided on both sides of the vertical center line of the connecting rod 13, and one end of the toothed portion 20 is meshed with a gear 14. A one-way positioning mechanism is provided on the inner side of the gear 14. A deep groove ball bearing 15 is fixedly connected to the inner side, and a first screw 17 is fixedly connected to the inner side of the deep groove ball bearing 15, and the first screw 17 is rotatably connected to the connecting frame 21. A transition mechanism is arranged on the outer side of the first screw 17, and a supporting plate 43 is fixedly connected to one end of the transition mechanism, and the supporting plate 43 is slidably connected to the storage bin 1. When the connecting rod 13 moves horizontally, it will rotate with the gear 14 through the toothed portion 20, and then the gear 14 will rotate with the first screw 17 through the one-way positioning mechanism, and when the toothed portion 20 completely passes the gear 14, a leg connecting plate 44 will be ejected from the inner side of the storage bin 1, and as the connecting rod 13 continues to move, the second guide plate 38 will move the leg connecting plate 44 toward the baffle 4 and the first guide plate 5.Under the action of the first guide plate 5 and the second guide plate 38, the leg connecting plates 44 on both sides are fixed to the two sides of the leg outer legs 45 at the same time. After the leg outer legs 45 are placed on the welding table 3 in the above manner, the staff only needs to step on the pedal 9 to quickly complete the fast fitting and fixing of the leg outer legs 45 and the leg connecting plates 44 on both sides. The staff does not need to fit and fix the leg connecting plates 44 and the leg outer legs 45 on both sides separately. Then the staff can weld the leg connecting plates 44 and the leg outer legs 45 with a welding gun. The operation is simple and convenient for the staff to use, thereby improving the overall welding efficiency.

[0035] As a further improvement of the present invention, Figure 8 As shown, the one-way positioning mechanism includes a ratchet 16 fixedly connected to a first screw 17, and the ratchet 16 rotates clockwise from top to bottom, a pawl 18 is provided at one end of the ratchet 16, and the pawl 18 is rotationally connected to the gear 14, one end of the pawl 18 is fixedly connected to a first spring 19, and the first spring 19 is fixedly connected to the gear 14, when the gear 14 rotates clockwise from top to bottom, the gear 14 will rotate clockwise with the ratchet 16 through the pawl 18, and then the ratchet 16 will rotate clockwise with the first screw 17, and when the tooth portion 20 rotates counterclockwise with the gear 14 during the resetting process of the connecting rod 13, the gear 14 will idle with the pawl 18 at this time, ensuring that the pawl 18 will not rotate counterclockwise with the ratchet 16, thereby ensuring that the leg connecting plate 44 on the inner side of the storage bin 1 is smoothly moved upward.

[0036] As a further improvement of the present invention, Figure 6 and Figure 7 As shown, the transition mechanism includes a transition plate 40 that is slidably connected to the first screw 17, the transition plate 40 is slidably connected to the connecting frame 21, the transition plate 40 is fixedly connected to the supporting plate 43, the outer side of the first screw 17 is spirally connected with the first half-threaded cylinder 46 and the second half-threaded cylinder 47, and one end of the first half-threaded cylinder 46 and the second half-threaded cylinder 47 is provided with a connecting assembly. When the first screw 17 is spirally rotated on the inner side of the first half-threaded cylinder 46 and the second half-threaded cylinder 47, it can move the first half-threaded cylinder 46 and the second half-threaded cylinder 47 in the vertical direction, and then the first half-threaded cylinder 46 and the second half-threaded cylinder 47 carry the transition plate 40 and the supporting plate 43 through the connecting assembly to push the supporting connecting plate 44 upward from the inner side of the storage bin 1.

[0037] As a further improvement of the present invention, Figure 6 and Figure 7As shown, the connecting assembly includes a side plate 48 to which a first half-threaded cylinder 46 and a second half-threaded cylinder 47 are fixedly connected, a second screw 50 is spirally connected to the inner side of the side plate 48, and movable plates 49 are rotatably connected to both sides of the second screw 50, and the movable plate 49 is slidably connected to the transition plate 40, one end of the movable plate 49 is fitted with a second locking screw 41, and the second locking screw 41 is spirally connected to the transition plate 40, the threads on both sides of the vertical center line of the second screw 50 are arranged in opposite ways, and the threads on the inner sides of the side plates 48 on both sides are adapted to the threads on both sides of the vertical center line of the second screw 50, so that when the second screw 50 rotates, the side plates 48 on both sides can move in opposite directions with the first half-threaded cylinder 46 and the second half-threaded cylinder 47, so that The first half threaded barrel 46 and the second half threaded barrel 47 are quickly separated from the first screw rod 17 or are engaged and sleeved with the first screw rod 17, and when it is necessary to move the supporting plate 43 from the top to the bottom of the storage bin 1, the first half threaded barrel 46 and the second half threaded barrel 47 are separated to ensure that the transition plate 40 can move downward with the supporting plate 43. At the same time, after the first half threaded barrel 46 and the second half threaded barrel 47 are fitted together, the inner thread is adapted to the spiral on the surface of the first screw rod 17 to ensure that the first screw 17 can move in the vertical direction with the first half threaded barrel 46 and the second half threaded barrel 47. At the same time, a scale line can be set on one side of the movable plate 49 to facilitate the staff to determine the moving distance between the movable plate 49 and the transition plate 40.

[0038] At the same time, since the thickness of the leg connecting plates 44 is different, and after stepping on the pedal 9, the distance that the support plate 43 moves upward is certain, in order to ensure that the leg connecting plates 44 of different thicknesses can be located at the top end of the support plate 43. The bottom can be in the same plane with the top surface of the storage bin 1 after stepping on the pedal, the position between the transition plate 40 and the first half threaded cylinder 46 and the second half threaded cylinder 47 can be adjusted to change the position of the support plate 43 in the vertical direction, thereby meeting the use of leg connecting plates 44 of different thicknesses, thereby improving the applicability of the device.

[0039] As a further improvement of the present invention, Figure 2 , Figure 4 and Figure 5As shown, the guide mechanism includes a guide shaft 31 fixedly connected to the welding table 3, a linear bearing 34 is slidably connected to the outer side of the guide shaft 31, a slider 33 is fixedly connected to the outer side of the linear bearing 34, the slider 33 is fixedly connected to the horizontal adjustment mechanism, a cross plate 30 is arranged on the outer side of the guide shaft 31, and the cross plate 30 is fixedly connected to the welding table 3, the cross plate 30 is slidably connected to the second pull rope 27, one end of the cross plate 30 is fixedly connected to the second spring 32, and the other end of the second spring 32 is fixedly connected to the horizontal adjustment mechanism, under the action of the linear bearing 34 and the guide shaft 31, the slider 33 can slide normally in the horizontal direction with the connecting seat 35, and the second spring 32 gives the connecting seat 35 an elastic force, after the pedal 9 is released, the connecting seat 35 can be reset to the right under the elastic force of the second spring 32.

[0040] As a further improvement of the present invention, Figure 1 , Figure 2 and Fig. 9 As shown, the horizontal adjustment mechanism includes a connecting seat 35 fixedly connected to the slider 33, a square rod 36 is fixedly connected to the inner side of the connecting seat 35, a movable plate 37 is slidably connected to the outer side of the square rod 36, and the movable plate 37 is fixedly connected to the second guide plate 38, the movable plate 37 is slidably connected to the connecting seat 35, a first locking screw 39 is spirally connected to the inner side of one end of the movable plate 37, and the first locking screw 39 is fitted with the square rod 36, the movable plate 37 can slide along the square rod 36 with the second guide plate 38, so that the horizontal position of the second guide plate 38 changes. Due to the different lengths of the leg connecting plates 44, After the pedal 9 is stepped on, the horizontal movement distance of the second guide plate 38 is certain. In order to ensure that the second guide plate 38 can push the leg connecting plates 44 of different lengths to the side of the leg outer leg 45, the movable plate 37 can move the second guide plate 38 in the horizontal direction, so that the second guide plate 38 is in a suitable position, ensuring that the second guide plate 38 can push the leg connecting plate 44 to move normally, thereby meeting the use of leg connecting plates 44 of different lengths, thereby further improving the applicability of the device, and scale lines can be set on the surface of the square rod 36 to help determine the position of the second guide plate 38.

[0041] As a further improvement of the present invention, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, one end of the welding table 3 is fixedly connected to the second fixed plate 29, one end of the connecting frame 21 located on one side of the storage bin 1 is fixedly connected to the first fixed plate 25, one end of the first fixed plate 25 and the second fixed plate 29 are rotatably connected to the third guide roller 26 and the fourth guide roller 28 respectively, and the second pull rope 27 passes through the third guide roller 26 and the fourth guide roller 28 in sequence, the third guide roller 26 and the fourth guide roller 28 play a guiding and limiting role for the second pull rope 27, thereby ensuring the normal operation of the second pull rope 27.

[0042] As a further improvement of the present invention, Figure 3 As shown, the inner side of the fixed seat 7 is rotatably connected with the first guide roller 10 and the second guide roller 11 in an upper and lower distribution, and the first pull rope 12 passes through the first guide roller 10 and the second guide roller 11 in sequence, and the outer side of the first pull rope 12 is slidably connected with a guide block 23, and the guide block 23 is fixedly connected to the storage bin 1, and the first guide roller 10 and the second guide roller 11 play a guiding and limiting role for the first pull rope 12 to ensure the normal operation of the first pull rope 12.

[0043] As a further improvement of the present invention, Figure 2 and Figure 3 As shown, the outer side of the connecting rod 13 is slidably connected to the limit plate 22, and the limit plate 22 is fixedly connected to the storage bin 1. The limit plate 22 supports and guides the connecting rod 13 to ensure that the connecting rod 13 moves normally in the horizontal direction.

[0044] As a further improvement of the present invention, Fig.10 As shown, a through hole 51 for the connecting rod 13 to pass through is opened on the inner side of one end of the fixing seat 7, and the through hole 51 of the fixing seat 7 is fixedly connected with a protective cover 8. The through hole 51 can ensure that the connecting rod 13 can pass through the fixing seat 7 normally, and the protective cover 8 can prevent the connecting rod 13 from moving and touching the staff, thereby protecting the welding staff.

[0045] Working process: when the outer leg 45 of the outrigger and the supporting connecting plate 44 need to be welded, first place the outrigger connecting plates 44 on the inner sides of the storage bins 1 on both sides, and then adjust the initial position of the second guide plate 38 according to the length of the outrigger connecting plates 44, and adjust it when the pedal 9 is not stepped on. When the pedal 9 is not stepped on, the connecting seat 35 will move the slider 33 to the rightmost side of the welding table 3 through the linear bearing 34 along the guide shaft 31 under the action of the second spring 32. After the pedal 9 is fully stepped on, the second guide plate 38 moves horizontally a certain distance. , the supporting plate 43 moves upward with the supporting connecting plate 44, and when the initial position of the second guide plate 38 is adjusted, the supporting plate 43 pushes out the topmost supporting leg connecting plate 44 inside the storage bin 1, that is, after the tooth portion 20 completely passes through the gear 14, the second guide plate 38 is just at the side of the supporting leg connecting plate 44, and when adjusting, the second guide plate 38 moves along the square rod 36 with the moving plate 37. After the second guide plate 38 is adjusted to a suitable initial position, the moving plate 37 is fixed to the square rod 36 by the first locking screw 39; Then, the distance between the transition plate 40 and the first half threaded cylinder 46 and the second half threaded cylinder 47 is adjusted according to the thickness of the leg connecting plate 44. During the adjustment, the movable plate 49 is moved along the transition plate 40 to change the distance between the transition plate 40 and the first half threaded cylinder 46 and the second half threaded cylinder 47, so as to ensure that after the first half threaded cylinder 46 and the second half threaded cylinder 47 move upward a certain distance with the supporting plate 43 through the transition plate 40, after the pedal 9 is stepped on, the leg connecting plates 44 of different thicknesses, the bottom of the leg connecting plate 44 located at the top end of the supporting plate 43 can be in the same plane with the top end surface of the storage bin 1, so as to facilitate the pushing of the second guide plate 38, and after the adjustment is completed, the movable plate 49 and the transition plate 40 are fixed by the second locking screw 41; Then the staff puts the outer leg 45 of the leg on the welding table 3, and makes the end of the welding table 3 fit together with the baffle 4. Then the staff steps on the pedal 9 downward. When the pedal 9 is stepped on, the first pull rope 12 can move downward with the pedal 9 under the action of the first guide roller 10 and the second guide roller 11. Then the first pull rope 12 will slide along the limit plate 22 with the connecting rod 13 through the L-shaped plate 24. At the same time, the connecting rod 13 will also rotate clockwise with the gear 14 through the toothed portion 20. The gear 14 will rotate clockwise with the ratchet 16 through the pawl 18. Then the ratchet 16 drives the first screw 17 in the first semi-threaded cylinder 46. And the inner side of the second half-threaded cylinder 47 rotates clockwise, then the first half-threaded cylinder 46 and the second half-threaded cylinder 47 move upward with the transition plate 40 and the supporting plate 43 through the side plate 48, the second screw rod 50, the movable plate 49 and the second locking screw 41, and the supporting plate 43 also moves upward with the leg connecting plate 44. When the tooth portion 20 completely passes through the gear 14, the leg connecting plate 44 at the top of the supporting plate 43 is ejected from the inner side of the storage bin 1, and the bottom end surface of the leg connecting plate 44 at the top of the supporting plate 43 is flush with the top surface of the storage bin 1. At the same time, when the connecting rod 13 moves horizontally, it will also bring the second pull rope 2 7 moves, and under the action of the third guide roller 26 and the fourth guide roller 28, the connecting seat 35 slides along the guide shaft 31 with the slider 33 and the linear bearing 34. At the same time, the connecting seat 35 also moves toward the direction close to the first guide plate 5 through the square rod 36 and the moving plate 37 with the second guide plate 38. When the leg connecting plate 44 at the top of the supporting plate 43 is pushed out from the inner side of the storage bin 1, the second guide plate 38 is on one side of the leg connecting plate 44. As the pedal 9 continues to step down, the second guide plate 38 pushes the leg connecting plate 44 to move toward the direction close to the first guide plate 5. Under the action of the guide limit, the leg connecting plates 44 on both sides are fixed to the two sides of the leg outer legs 45 at the same time, and then the staff can perform welding. After the leg outer legs 45 are placed on the welding table 3 in the above manner, the staff only needs to step on the pedal 9 to quickly complete the fast fitting and fixing of the leg outer legs 45 and the leg connecting plates 44 on both sides. The staff does not need to fit and fix the leg connecting plates 44 and the leg outer legs 45 on both sides separately, and then the staff can use the welding gun to weld the leg connecting plates 44 and the leg outer legs 45. The operation is simple and convenient for the staff to use, thereby improving the overall welding efficiency. After the welding is completed, it is necessary to remove the welded leg connecting plate 44 and the supporting outer leg 45 from the top of the welding table 3, and then release the pedal 9. At this time, the connecting seat 35 can be reset to the right under the elastic force of the second spring 32, and the connecting seat 35 will also return to the initial position with the second guide plate 38 through the square rod 36 and the movable plate 37. At the same time, under the pulling force of the second pull rope 27, the connecting rod 13 and the second pull rope 12, the pedal 9 can also return to the initial position, waiting for the next work. After the welded leg connecting plate 44 and the supporting outer leg 45 are removed from the top of the welding table 3, a new supporting outer leg 45 can be put on again for welding; and when the toothed portion 20 rotates counterclockwise with the gear 14 during the resetting process of the connecting rod 13, the gear 14 will idle with the pawl 18 to ensure that the pawl 18 will not rotate counterclockwise with the ratchet 16, thereby ensuring that the leg connecting plate 44 on the inner side of the storage bin 1 is smoothly moved upward; When it is necessary to move the supporting plate 43 from the top to the bottom of the storage bin 1, the second screw 50 is rotated counterclockwise so that the second screw 50 is separated from the corresponding first half-threaded cylinder 46 and the second half-threaded cylinder 47 through the side plate 48, and then the transition plate 40 can move downward with the supporting plate 43. When the supporting plate 43 moves to the appropriate position, the second screw 50 is rotated clockwise so that the second screw 50 is re-fitted and engaged with the first screw 17 through the side plate 48 with the corresponding first half-threaded cylinder 46 and the second half-threaded cylinder 47. At the same time, it is necessary to ensure that the inner thread of the first half-threaded cylinder 46 and the second half-threaded cylinder 47 are matched with the spiral on the surface of the first screw 17 after the first half-threaded cylinder 46 and the second half-threaded cylinder 47 are fitted together, so as to ensure that the first screw 17 can move in the vertical direction with the first half-threaded cylinder 46 and the second half-threaded cylinder 47. At the same time, a scale line can be set on one side of the movable plate 49 to facilitate the staff to determine the moving distance between the movable plate 49 and the transition plate 40.

[0046] The above is a preferred embodiment of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the protection scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected. The protection scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. An adjustable welding device for a semitrailer chassis leg, comprising a material storage bin (1) and a welding table (3), characterized in that: The four corners of the bottom of the storage bin (1) are fixedly connected to bin legs (2), both ends of the storage bin (1) are fixedly connected to connection frames (21), both sides of the vertical center line of the welding platform (3) are fixedly connected to the storage bin (1), and the top surface of the storage bin (1) is flush with the top surface of the welding platform (3), the inner sides of the two storage bins (1) are symmetrically placed with support leg connection plates (44) about the vertical center line of the welding platform (3), the top of the welding platform (3) is placed with support leg outer legs (45), and the top of the welding platform (3) is fixedly connected to the storage bin (1). A baffle (4) is fixedly connected, and both ends of the baffle (4) are fixedly connected to a first guide plate (5). A fixed seat (7) is provided on one side of the storage bin (1), and one end of the fixed seat (7) is fixedly connected to a cross bar (6), and the cross bar (6) is fixedly connected to the bin leg (2). The inner side of the fixed seat (7) is fixedly connected to a guide rail (42), and the outer side of the guide rail (42) is slidably connected to a pedal (9), and the pedal (9) is slidably connected to the fixed seat (7), and one end of the pedal (9) is fixedly connected to a first pull rope ( 12), the other end of the first pull rope (12) is fixedly connected to an L-shaped plate (24), one end of the L-shaped plate (24) is fixedly connected to a connecting rod (13), one end of the connecting rod (13) is fixedly connected to a second pull rope (27), the other end of the second pull rope (27) is fixedly connected to a horizontal adjustment mechanism, one end of the horizontal adjustment mechanism is fixedly connected to a second guide plate (38), a guide mechanism is provided at the bottom end of the horizontal adjustment mechanism, and teeth (20) are provided on both sides of the vertical center line of the connecting rod (13). One end of the toothed portion (20) is meshed with a gear (14), a one-way positioning mechanism is provided on the inner side of the gear (14), a deep groove ball bearing (15) is fixedly connected to the inner side of the gear (14), a first screw (17) is fixedly connected to the inner side of the deep groove ball bearing (15), and the first screw (17) is rotatably connected to the connecting frame (21), a transition mechanism is provided on the outer side of the first screw (17), one end of the transition mechanism is fixedly connected to a support plate (43), and the support plate (43) is slidably connected to the storage bin (1).

2. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: The one-way positioning mechanism comprises a ratchet (16) fixedly connected to the first screw (17), and the ratchet (16) rotates clockwise from top to bottom, a pawl (18) is provided at one end of the ratchet (16), and the pawl (18) is rotationally connected to the gear (14), and a first spring (19) is fixedly connected to one end of the pawl (18), and the first spring (19) is fixedly connected to the gear (14).

3. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: The transition mechanism comprises a transition plate (40) slidably connected to the first screw rod (17), the transition plate (40) is slidably connected to the connection frame (21), the transition plate (40) is fixedly connected to the support plate (43), the outer side of the first screw rod (17) is spirally connected to a first half-threaded cylinder (46) and a second half-threaded cylinder (47), and one end of the first half-threaded cylinder (46) and the second half-threaded cylinder (47) is provided with a connecting assembly.

4. The adjustable welding device for a semitrailer chassis leg according to claim 3, characterized in that: The connection assembly comprises a side plate (48) to which a first half-threaded cylinder (46) and a second half-threaded cylinder (47) are fixedly connected, a second screw rod (50) is spirally connected to the inner side of the side plate (48), both sides of the second screw rod (50) are rotatably connected to movable plates (49), and the movable plates (49) are slidably connected to the transition plate (40), and one end of the movable plate (49) is fitted with a second locking screw (41), and the second locking screw (41) is spirally connected to the transition plate (40).

5. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: The guide mechanism comprises a guide shaft (31) fixedly connected to the welding table (3); a linear bearing (34) is slidably connected to the outer side of the guide shaft (31); a slider (33) is fixedly connected to the outer side of the linear bearing (34); the slider (33) is fixedly connected to the horizontal adjustment mechanism; a transverse plate (30) is arranged on the outer side of the guide shaft (31); the transverse plate (30) is fixedly connected to the welding table (3); the transverse plate (30) is slidably connected to the second pull rope (27); one end of the transverse plate (30) is fixedly connected to the second spring (32); and the other end of the second spring (32) is fixedly connected to the horizontal adjustment mechanism.

6. The adjustable welding device for a semitrailer chassis leg according to claim 5, characterized in that: The horizontal adjustment mechanism comprises a connecting seat (35) fixedly connected to the slider (33); a square rod (36) is fixedly connected to the inner side of the connecting seat (35); a moving plate (37) is slidably connected to the outer side of the square rod (36); the moving plate (37) is fixedly connected to the second guide plate (38); the moving plate (37) is slidably connected to the connecting seat (35); a first locking screw (39) is spirally connected to the inner side of one end of the moving plate (37); and the first locking screw (39) is in contact with the square rod (36).

7. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: One end of the welding table (3) is fixedly connected to a second fixed plate (29), one end of the connection frame (21) located on one side of the storage bin (1) is fixedly connected to a first fixed plate (25), one end of the first fixed plate (25) and the second fixed plate (29) are rotatably connected to a third guide roller (26) and a fourth guide roller (28) respectively, and the second pull rope (27) passes through the third guide roller (26) and the fourth guide roller (28) in sequence.

8. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: The inner side of the fixed seat (7) is rotatably connected to a first guide roller (10) and a second guide roller (11) in an upper and lower distribution, and the first pull rope (12) passes through the first guide roller (10) and the second guide roller (11) in sequence, and the outer side of the first pull rope (12) is slidably connected to a guide block (23), and the guide block (23) is fixedly connected to the storage bin (1).

9. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: The outer side of the connecting rod (13) is slidably connected to a limit plate (22), and the limit plate (22) is fixedly connected to the material storage bin (1).

10. The adjustable welding device for a semitrailer chassis leg according to claim 1, characterized in that: A through hole (51) for the connecting rod (13) to pass through is provided on the inner side of one end of the fixing seat (7), and a protective cover (8) is fixedly connected to the through hole (51) of the fixing seat (7).

Images