Supporting mechanism and method for welding dozer blade of miniature excavator

Abstract

The invention relates to the technical field of supporting mechanisms, in particular to a supporting mechanism and method for welding a dozer blade of a miniature excavator. The supporting mechanism comprises an operation table, two supporting columns are symmetrically and fixedly connected to the upper surface of the operation table, and supporting rollers used for supporting the dozer blade are installed at the tops of the supporting columns; an angle compensation mechanism is installed on the upper surface of the operation table, a manually-operated welding gun is arranged over the operation table, the angle compensation mechanism comprises a first sliding groove, the first sliding groove is formed in the middle of the upper surface of the operation table, and a sliding base is slidably connected to the inner side wall of the first sliding groove. A rotating shaft is rotationally connected between the opposite sides of the two supporting columns through bearings. In the process of supporting the bulldozing blade, the welding position can be automatically changed by rotating the bulldozing blade, the position of the welding gun can be kept fixed so that the welding stability can be improved, and meanwhile, the angle change between the bulldozing blade and the welding gun during rotation of the bulldozing blade is compensated by inclining the operation table and the bulldozing blade.

Description

Technical Field

[0001] The invention relates to the technical field of supporting mechanisms, in particular to a supporting mechanism and a method for welding a bulldozer blade of a mini excavator. Background Art

[0002] A mini excavator is a type of small excavator. Compared with a large excavator, it is small and flexible, has good mobility, and is highly adaptable. It is small and light, easy to mobilize and operate, and can enter a narrow work site for operation. A bulldozer can be installed on a mini excavator, and this modification can improve the operating efficiency and quality of the mini excavator, so that the mini excavator has the functions of trenching and backfilling, bulldozing and leveling, and pushing materials together; In order to enhance the stability of the bulldozer bucket of the mini excavator and prevent deformation, reinforcing ribs are generally welded on the back of the bulldozer bucket to enhance the structural strength. In order to increase the bulldozing efficiency and prevent the soil from deviating to the sides of the bucket, the cross-section of the bucket is designed to be an elliptical arc. During the welding process, in order to ensure the welding quality, the welding gun and the welding surface need to maintain a certain angle. For the bulldozer with an elliptical cross-section mentioned above, when welding reinforcing ribs, in order to avoid frequent movement of the welding position and to ensure stability and continuity during welding, a welding support mechanism is required, which needs to be able to move and change the welding point by itself to ensure the continuity of welding, and needs to maintain the angle between the welding gun and the bulldozer. However, because the cross-section of the existing bulldozer is an elliptical arc, during the welding process, the movement of the bulldozer will cause the angle between the welding gun and the bulldozer to change, affecting the welding quality. Therefore, a support mechanism and method for welding a mini excavator bulldozer are proposed. Summary of the invention

[0003] The purpose of the present invention is to provide a support mechanism and method for welding a micro excavator bulldozer to solve the problem raised in the above background technology that "because the cross-section of the existing bulldozer is an elliptical arc, during the welding process, the movement of the bulldozer will cause the angle between the welding gun and the bulldozer to change, affecting the welding quality."

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a support mechanism for welding a bulldozer blade of a mini excavator, comprising an operating table, two support columns are symmetrically fixedly connected to the upper surface of the operating table, support rollers for supporting the bulldozer blade are installed on the top of the support columns, an angle compensation mechanism is installed on the upper surface of the operating table, and a manually operated welding gun is provided directly above the operating table; The angle compensation mechanism includes a slide groove 1, the slide groove 1 is opened in the middle of the upper surface of the operating table, the inner side wall of the slide groove 1 is slidably connected with a slide seat, a rotating shaft is rotatably connected between the opposite sides of the two support columns through a bearing, a rotating column is fixedly connected to the middle of the outer side wall of the rotating shaft, a telescopic rod is fixedly connected to the right side of the upper surface of the rotating column, a chuck is hinged at the top of the telescopic rod, two racks are symmetrically fixedly connected to the upper surface of the slide seat, two gear rings are symmetrically fixedly connected to the outer side wall of the rotating column, the gear ring is meshed with the rack, a bottom plate is provided below the operating table, a vertical rod is hinged on the right side of the lower surface of the operating table, and the bottom of the vertical rod is fixedly connected to the right side of the upper surface of the bottom plate; The angle compensation mechanism also includes an adjustment component. When the bulldozer is driven to rotate, the adjustment component can tilt the operating platform and the bulldozer as a whole, thereby compensating for the angle change between the bulldozer and the welding gun when the bulldozer rotates.

[0005] The present invention can automatically change the welding position by rotating the bulldozer shovel during the process of supporting the bulldozer shovel, can keep the welding gun in a fixed position and increase the welding stability, and at the same time, by tilting the operating table and the bulldozer shovel, compensate for the angle change between the bulldozer shovel and the welding gun when the bulldozer shovel rotates; As a further preferred embodiment of the technical solution: the telescopic rod comprises a cylinder, the bottom of the cylinder is fixedly connected to the right side of the upper surface of the rotating column, the upper surface of the cylinder is provided with a circular groove, and the inner side wall of the circular groove is slidably connected with a sliding rod.

[0006] Under the above setting, the sliding rod is extended and retracted on the inner wall of the circular groove, so that the telescopic rod is suitable for the change of the distance from the right end of the bulldozer shovel to the rotating column when the elliptical arc bulldozer shovel rotates, so that the inner wall of the bulldozer shovel can always keep in contact with the supporting roller, and at the same time the telescopic rod can pull or push the bulldozer shovel to rotate.

[0007] As a further preferred embodiment of the present technical solution: the chuck includes a connecting frame, the lower surface of the connecting frame is hinged to the top of the telescopic rod, the upper surface of the connecting frame is threadedly connected to a screw, the bottom end of the screw is rotatably connected to a splint via a bearing, the top of the screw is fixedly connected to a knob 1, and the lower surface of the splint and the bottom wall of the inner side wall of the connecting frame are both bonded with rubber pads.

[0008] Under the above setting, the screw is rotated clockwise to drive the clamping plate to move, so that the clamping plate approaches and supports the right end of the bulldozer shovel. In this way, the right end of the bulldozer shovel is clamped and fixed, so that the bulldozer shovel can rotate synchronously with the chuck. The setting of the rubber pad is convenient for increasing friction and improving the clamping and fixing effect of the bulldozer shovel.

[0009] As a further preferred embodiment of the present technical solution: the adjustment component includes a transmission rod, the transmission rod is hinged on the left side of the lower surface of the slide, the bottom end of the transmission rod is hinged to the left side of the upper surface of the base plate, an electric cylinder 1 is installed on the left side wall of the operating table, one end of the piston rod of the electric cylinder 1 passes through the left side wall of the operating table and is fixedly connected to the left side wall of the slide, and when the operating table is horizontal, the transmission rod is in a state of tilting to the right.

[0010] The present invention is provided with an angle compensation mechanism. When the angle compensation mechanism is working, the piston rod of the electric cylinder is retracted to drive the slide and the rack to move to the left, drive the gear ring, the rotating column, the telescopic rod and the chuck to rotate clockwise, and the chuck pulls the bulldozer to rotate clockwise, automatically changing the welding position. When the bulldozer rotates clockwise, the angle between the welding gun and the bulldozer gradually increases because the bulldozer is in an elliptical arc shape. When the slide moves to the left, the slide pushes the transmission rod, and the inclination angle of the transmission rod becomes smaller, so that the left end of the operating table is lifted and raised, so that the bulldozer tilts to the right as a whole, reducing the angle between the welding gun and the bulldozer, and avoiding excessive welding angle. One end of the piston rod extends, driving the slide and the rack to move right, driving the gear ring, rotating column, telescopic rod and chuck to rotate counterclockwise, and the chuck pulls the bulldozer shovel to rotate counterclockwise, automatically changing the welding position. When the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases, the slide moves to the right and pulls the transmission rod at the same time, the inclination angle of the transmission rod increases, and the left end of the operating table is lowered, so that the bulldozer shovel is tilted to the left as a whole, increasing the angle between the welding gun and the bulldozer shovel, avoiding the welding angle being too small, realizing the compensation and maintenance of the angle between the welding gun and the bulldozer shovel, avoiding the problems of welding deformation and insufficient welding caused by excessive or small angles, and improving the welding quality.

[0011] As a further preferred embodiment of the present technical solution: the adjusting assembly includes a screw rod, both ends of the screw rod are rotatably connected to the two sides of the inner wall of the slide groove through bearings respectively, a motor is installed on the left side wall of the operating table, the screw rod is threadedly connected to the slide seat, a mounting frame is fixedly connected to the middle part of the lower surface of the slide seat, a walking wheel is installed on the bottom end of the mounting frame, an inclined plate is provided on the left side of the upper surface of the base plate, and when the operating table is horizontal, the walking wheel is located in the middle part of the inclined plate.

[0012] Under the above setting, the output shaft of the motor rotates clockwise to drive the screw to rotate clockwise, so that the slide moves to the left along the outer wall of the screw, drives the rack to move to the left, and then drives the gear ring, the rotating column, the telescopic rod and the chuck to rotate clockwise, and the chuck pulls the bulldozer shovel to rotate clockwise, automatically changing the welding position. When the bulldozer shovel rotates clockwise, the angle between the welding gun and the bulldozer shovel gradually increases because the bulldozer shovel is in an elliptical arc shape. When the slide moves to the left, the slide drives the travel wheel to move to the left, and the travel wheel moves to the left and climbs on the upper surface of the inclined plate, lifting the left end of the operating table and raising it, so that the bulldozer shovel is tilted to the right as a whole, reducing the angle between the welding gun and the bulldozer shovel, and avoiding excessive welding angle. One end of the output shaft rotates counterclockwise to drive the screw rod to rotate counterclockwise, so that the slide moves to the right along the outer side wall of the screw rod, driving the rack to move to the right, and then driving the gear ring, rotating column, telescopic rod and chuck to rotate counterclockwise. The chuck pushes the bulldozer shovel to rotate counterclockwise, and the welding position is automatically changed. When the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases because the bulldozer shovel is in an elliptical arc shape. While the slide moves to the right, the slide drives the traveling wheel to move to the right, and the traveling wheel moves downhill to the right on the upper surface of the inclined plate, so that the left end of the operating table is lowered, and the bulldozer shovel is tilted to the left as a whole, thereby increasing the angle between the welding gun and the bulldozer shovel, avoiding that the welding angle is too small, thereby avoiding the problem of too large or too small welding angle.

[0013] As a further preferred embodiment of the present technical solution: the right end of the inclined plate is hinged to the left side of the upper surface of the base plate, a slide groove 2 is opened on the left side of the upper surface of the base plate, the inner side wall of the slide groove 2 is slidably connected with a slider, the upper surface of the slider is fixedly connected with a lifting roller, the left side wall of the base plate is fixedly connected with a bearing plate, the upper surface of the bearing plate is installed with an electric cylinder 2, and one end of the piston rod of the electric cylinder 2 is fixedly connected to the left side wall of the slider.

[0014] Under the above setting, the slider is driven to move left and right by extending and retracting one end of the piston rod of the second electric cylinder, thereby changing the support point of the jacking roller on the tilting plate, thereby changing the tilt angle of the tilting plate. In this way, when the walking wheel moves the same horizontal distance on the tilting plate, the tilt angle of the operating platform and the bulldozer will change. The smaller the tilt angle of the tilting plate, the greater the change in the tilt angle of the operating platform and the bulldozer, thereby adjusting the size of the compensation angle to improve applicability.

[0015] As a further preferred embodiment of the technical solution: a positioning mechanism is installed on the outer wall of the operating table, and the positioning mechanism includes two blind grooves, and the two blind grooves are symmetrically opened on the outer wall of the operating table, and the inner wall of the blind groove is slidably connected with a slide, and the end of the slide away from the operating table is fixedly connected with a vertical plate, and the side of the vertical plate close to the operating table is evenly fixedly connected with a mounting column, and the end of the mounting column away from the vertical plate is provided with a ball bearing.

[0016] As a further preferred embodiment of the technical solution: the lower surface of the operating table is symmetrically threaded with two push rods, and the bottom ends of the push rods are fixedly connected with knob 2.

[0017] Under the above setting, the slide plate is pushed inward to make the ball bearing fit the outer wall of the bulldozer shovel, and the push rod is rotated clockwise to make the push rod press the slide plate tightly, and the slide plate is locked with the help of friction. In this way, when the bulldozer shovel rotates, the ball bearing can provide positioning guide for the bulldozer shovel, prevent the bulldozer shovel from deviating from the rotation, and ensure the accuracy of welding.

[0018] As a further preferred embodiment of the technical solution: the outer side wall of the bottom plate is evenly and fixedly connected with a mounting block, and the lower surface of the mounting block is provided with a mounting hole.

[0019] The present invention also provides a method for using a support mechanism for welding a micro excavator bulldozer, comprising the following steps: S1. Place the bulldozer with its opening downward on two supporting rollers, push the slide plate inward so that the ball bearings fit the outer wall of the bulldozer, support the bulldozer through the supporting rollers, and clamp the right end of the bulldozer with the help of a chuck; S2. The piston rod of the electric cylinder is retracted to drive the slide and the rack to move to the left, driving the gear ring, the rotating column, the telescopic rod and the chuck to rotate clockwise. The chuck pulls the bulldozer to rotate clockwise, automatically changing the welding position. S3. When the bulldozer shovel rotates clockwise, the angle between the welding gun and the bulldozer shovel gradually increases because the bulldozer shovel is in an elliptical arc shape. When the slide moves to the left, the slide pushes the transmission rod, and the inclination angle of the transmission rod decreases, which lifts up the left end of the operating table and tilts the bulldozer shovel to the right as a whole, thereby reducing the angle between the welding gun and the bulldozer shovel and avoiding excessive welding angle. S4. The slide and the rack are moved to the right by extending one end of the piston rod of the electric cylinder, and the gear ring, the rotating column, the telescopic rod and the chuck are rotated counterclockwise. The chuck pulls the bulldozer shovel to rotate counterclockwise, and the welding position is automatically changed. When the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases. The slide moves to the right and pulls the transmission rod at the same time. The inclination angle of the transmission rod increases, and the left end of the operating table is lowered, so that the bulldozer shovel is tilted to the left as a whole, and the angle between the welding gun and the bulldozer shovel is increased to avoid the welding angle being too small, and the welding angle is compensated in real time.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can automatically change the welding position by rotating the bulldozer shovel during the process of supporting the bulldozer shovel, can keep the welding gun in a fixed position and increase the stability of welding, and at the same time, by tilting the operating table and the bulldozer shovel, compensate for the angle change between the bulldozer shovel and the welding gun when the bulldozer shovel rotates.

[0021] 2. The present invention sets an angle compensation mechanism. When the angle compensation mechanism is working, one end of the piston rod of the electric cylinder is retracted to drive the slide and the rack to move leftward, drive the gear ring, the rotating column, the telescopic rod and the chuck to rotate clockwise, and the chuck pulls the bulldozer shovel to rotate clockwise, automatically changing the welding position. When the bulldozer shovel rotates clockwise, the angle between the welding gun and the bulldozer shovel gradually increases because the bulldozer shovel is in an elliptical arc shape. When the slide moves to the left, the slide pushes the transmission rod, and the inclination angle of the transmission rod becomes smaller, so that the left end of the operating table is lifted and raised, so that the bulldozer shovel is tilted to the right as a whole, reducing the angle between the welding gun and the bulldozer shovel, and avoiding excessive welding angle.

[0022] 3. The present invention extends one end of the piston rod of the electric cylinder to drive the slide and the rack to move right, drive the gear ring, the rotating column, the telescopic rod and the chuck to rotate counterclockwise, and the chuck pulls the bulldozer shovel to rotate counterclockwise, automatically changing the welding position. When the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases, the slide moves to the right and pulls the transmission rod at the same time, the inclination angle of the transmission rod increases, the left end of the operating table is lowered, the bulldozer shovel is tilted to the left as a whole, the angle between the welding gun and the bulldozer shovel is increased, and the welding angle is avoided to be too small, and the welding deformation and insufficient welding caused by the angle being too large or too small are avoided, thereby improving the welding quality.

[0023] 4. The present invention pushes the slide plate inward to make the ball bearing fit the outer wall of the bulldozer shovel, rotates the push rod clockwise to make the push rod press the slide plate, and locks the slide plate with the help of friction. In this way, when the bulldozer shovel rotates, the ball bearing can provide positioning guidance for the bulldozer shovel, prevent the bulldozer shovel from deviating from the rotation, and ensure the accuracy of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a right view structural schematic diagram of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the structure of the support column and the support roller in the present invention; Figure 4 It is a schematic diagram of the structure of the slide plate and the vertical plate in the present invention; Figure 5 It is a schematic diagram of the structure of the cylinder and the sliding rod in the present invention; Figure 6 It is a schematic diagram of the structure of the rack and the gear ring in the present invention; Figure 7 It is a cross-sectional structural schematic diagram of the operating table in the present invention; Figure 8 For the present invention Figure 2 A magnified view of the structure of area A; Fig. 9 It is a schematic diagram of the structure of the traveling wheel and the inclined plate in the present invention; Fig.10 It is a structural schematic diagram of the second slideway and the sliding block in the present invention.

[0025] In the figure: 1. Operating table; 2. Support column; 3. Support roller; 4. Angle compensation mechanism; 5. Positioning mechanism; 6. Mounting block; 7. Mounting hole; 41. Slideway 1; 42. Slide seat; 43. Rotating shaft; 44. Rotating column; 45. Telescopic rod; 46. Clamp; 47. Rack; 48. Gear ring; 49. Bottom plate; 410. Vertical rod; 411. Transmission rod; 412. Electric cylinder 1; 413. Screw rod; 414. Motor; 415. Mounting frame; 416. Travel wheel; 417. Inclined plate; 418. Slideway 2; 419. Sliding block; 420. Lifting roller; 421. Loading plate; 422. Electric cylinder 2; 451, cylinder; 452, circular groove; 453, slide bar; 461. Connecting frame; 462. Screw rod; 463. Clamp; 464. Knob 1; 465. Rubber pad.

[0026] 51. Blind groove; 52. Slide plate; 53. Vertical plate; 54. Mounting column; 55. Ball bearing; 56. Push rod; 57. Knob 2. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limitations on the present application. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-8 The present invention provides a technical solution: a support mechanism for welding a bulldozer blade of a mini excavator, comprising an operating platform 1, two support columns 2 are symmetrically fixedly connected to the upper surface of the operating platform 1, a support roller 3 for supporting the bulldozer blade is installed on the top of the support column 2, an angle compensation mechanism 4 is installed on the upper surface of the operating platform 1, and a manually operated welding gun is provided directly above the operating platform 1; The angle compensation mechanism 4 includes a slide groove 41, which is opened in the middle of the upper surface of the operating table 1. The inner wall of the slide groove 41 is slidably connected with a slide seat 42. A rotating shaft 43 is rotatably connected between the opposite sides of the two support columns 2 through a bearing. A rotating column 44 is fixedly connected to the middle of the outer wall of the rotating shaft 43. A telescopic rod 45 is fixedly connected to the right side of the upper surface of the rotating column 44. A clamp 46 is hinged on the top of the telescopic rod 45. Two racks 47 are symmetrically fixedly connected to the upper surface of the slide seat 42. Two gear rings 48 are symmetrically fixedly connected to the outer wall of the rotating column 44. The gear rings 48 are meshed with the racks 47. A bottom plate 49 is provided below the operating table 1. A vertical rod 410 is hinged on the right side of the lower surface of the operating table 1. The bottom of the vertical rod 410 is fixedly connected to the right side of the upper surface of the bottom plate 49. The angle compensation mechanism 4 also includes an adjustment component. While driving the bulldozer to rotate, the adjustment component can tilt the operating platform 1 and the bulldozer as a whole, thereby compensating for the angle change between the bulldozer and the welding gun when the bulldozer rotates.

[0029] The present invention can automatically change the welding position by rotating the bulldozer in the process of supporting the bulldozer, can keep the welding gun in a fixed position and increase the stability of welding, and at the same time, by tilting the operating platform 1 and the bulldozer, compensate for the angle change between the bulldozer and the welding gun when the bulldozer rotates; In this embodiment, specifically: the telescopic rod 45 includes a cylinder 451, the bottom of the cylinder 451 is fixedly connected to the right side of the upper surface of the rotating column 44, the upper surface of the cylinder 451 is provided with a circular groove 452, and the inner side wall of the circular groove 452 is slidably connected with a sliding rod 453.

[0030] Under the above setting, the slide rod 453 is extended and retracted on the inner wall of the circular groove 452, so that the telescopic rod 45 is suitable for the change of the distance from the right end of the bulldozer to the rotating column 44 when the elliptical arc bulldozer rotates, so that the inner wall of the bulldozer can always keep in contact with the supporting roller 3, and at the same time the telescopic rod 45 can pull or push the bulldozer to rotate.

[0031] In this embodiment, specifically: the chuck 46 includes a connecting frame 461, the lower surface of the connecting frame 461 is hinged to the top of the telescopic rod 45, the upper surface of the connecting frame 461 is threadedly connected with a screw 462, the bottom end of the screw 462 is rotatably connected to a clamping plate 463 through a bearing, the top of the screw 462 is fixedly connected with a knob 464, and the lower surface of the clamping plate 463 and the bottom wall of the inner side wall of the connecting frame 461 are both bonded with a rubber pad 465.

[0032] Under the above setting, the screw rod 462 is rotated clockwise to drive the clamping plate 463 to move, so that the clamping plate 463 is close to and supports the right end of the bulldozer shovel. In this way, the right end of the bulldozer shovel is clamped and fixed, so that the bulldozer shovel can keep synchronous rotation with the clamp 46. The setting of the rubber pad 465 increases the friction between the bulldozer shovel and the clamping plate 463 and the connecting frame 461, thereby improving the clamping and fixing effect and preventing slipping.

[0033] In this embodiment, specifically: the adjustment component includes a transmission rod 411, the transmission rod 411 is hinged on the left side of the lower surface of the slide 42, the bottom end of the transmission rod 411 is hinged to the left side of the upper surface of the bottom plate 49, and an electric cylinder 412 is installed on the left side wall of the operating table 1. One end of the piston rod of the electric cylinder 412 passes through the left side wall of the operating table 1 and is fixedly connected to the left side wall of the slide 42. When the operating table 1 is horizontal, the transmission rod 411 is in a state of tilting to the right.

[0034] Under the above settings, in order to avoid the problem that "because the cross-section of the existing bulldozer is an elliptical arc, during the welding process, the movement of the bulldozer will cause the change of the angle between the welding gun and the bulldozer, affecting the welding quality", the present invention sets an angle compensation mechanism 4. When the angle compensation mechanism 4 is working, the piston rod of the electric cylinder 412 is retracted to drive the slide 42 and the rack 47 to move left, and drive the gear ring 48, the rotating column 44, the telescopic rod 45 and the chuck 46 to rotate clockwise. The chuck 46 pulls the bulldozer to rotate clockwise to automatically change the welding position. When the bulldozer rotates clockwise, the angle between the welding gun and the bulldozer gradually increases because the bulldozer is in an elliptical arc shape. When the slide 42 moves to the left, the slide 42 pushes the transmission rod 411, and the inclination angle of the transmission rod 411 becomes smaller, so that the left end of the operating table 1 is lifted up, so that the bulldozer rotates clockwise. The shovel is tilted to the right as a whole, reducing the angle between the welding gun and the bulldozer shovel and avoiding an excessively large welding angle; one end of the piston rod of the electric cylinder 412 is extended to drive the slide 42 and the rack 47 to move to the right, driving the gear ring 48, the rotating column 44, the telescopic rod 45 and the chuck 46 to rotate counterclockwise, and the chuck 46 pulls the bulldozer shovel to rotate counterclockwise, automatically changing the welding position, and when the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases, and the slide 42 moves to the right and pulls the transmission rod 411 at the same time, and the inclination angle of the transmission rod 411 increases, lowering the left end of the operating table 1, so that the bulldozer shovel is tilted to the left as a whole, increasing the angle between the welding gun and the bulldozer shovel, avoiding an excessively small welding angle, realizing compensation and maintenance of the angle between the welding gun and the bulldozer shovel, avoiding problems such as welding deformation and insufficient welding caused by excessive or small angles, and improving the welding quality.

[0035] In this embodiment, specifically: a positioning mechanism 5 is installed on the outer wall of the operating table 1, and the positioning mechanism 5 includes two blind grooves 51, and the two blind grooves 51 are symmetrically opened on the outer wall of the operating table 1, and the inner wall of the blind groove 51 is slidably connected with a slide plate 52, and the end of the slide plate 52 away from the operating table 1 is fixedly connected with a vertical plate 53, and the side of the vertical plate 53 close to the operating table 1 is evenly fixedly connected with a mounting column 54, and the end of the mounting column 54 away from the vertical plate 53 is provided with a ball 55.

[0036] In this embodiment, specifically: two push rods 56 are symmetrically threadedly connected to the lower surface of the operating table 1 , and a second knob 57 is fixedly connected to the bottom end of the push rod 56 .

[0037] Under the above setting, the slide plate 52 is pushed inward to make the ball 55 fit the outer wall of the bulldozer shovel, and the push rod 56 is rotated clockwise to make the push rod 56 press against the slide plate 52, and the slide plate 52 is locked by friction. In this way, when the bulldozer shovel rotates, the ball 55 can provide a positioning guide for the bulldozer shovel to prevent the bulldozer shovel from deviating from the rotation, thereby ensuring the accuracy of welding.

[0038] In this embodiment, specifically: the outer wall of the base plate 49 is evenly fixedly connected with the mounting block 6, and the lower surface of the mounting block 6 is provided with a mounting hole 7; the mounting block 6 is locked by means of the mounting hole 7 in conjunction with an external screw to avoid accidental movement of the base plate 49 during welding.

[0039] Example 2 See also Figure 9-10 The adjustment component includes a screw rod 413, and the two ends of the screw rod 413 are rotatably connected to the two sides of the inner wall of the slide groove 41 through bearings. A motor 414 is installed on the left side wall of the operating table 1. The screw rod 413 is threadedly connected to the slide seat 42. A mounting frame 415 is fixedly connected to the middle part of the lower surface of the slide seat 42. A walking wheel 416 is installed at the bottom end of the mounting frame 415. An inclined plate 417 is provided on the left side of the upper surface of the bottom plate 49. When the operating table 1 is horizontal, the walking wheel 416 is located in the middle of the inclined plate 417.

[0040] Under the above setting, the output shaft of the motor 414 rotates clockwise to drive the screw rod 413 to rotate clockwise, so that the slide 42 moves to the left along the outer wall of the screw rod 413, drives the rack 47 to move to the left, and then drives the gear ring 48, the rotating column 44, the telescopic rod 45 and the chuck 46 to rotate clockwise, and the chuck 46 pulls the bulldozer to rotate clockwise, automatically changing the welding position. When the bulldozer rotates clockwise, the angle between the welding gun and the bulldozer gradually increases because the bulldozer is in an elliptical arc shape. When the slide 42 moves to the left, the slide 42 drives the walking wheel 416 to move to the left. The walking wheel 416 moves to the left and climbs on the upper surface of the inclined plate 417, lifts up the left end of the operating table 1, and makes the bulldozer tilt to the right as a whole, reducing the angle between the welding gun and the bulldozer, and avoiding excessive welding angle. One end of the output shaft of the machine 414 rotates counterclockwise, driving the screw rod 413 to rotate counterclockwise, so that the slide 42 moves to the right along the outer wall of the screw rod 413, driving the rack 47 to move to the right, and then driving the gear ring 48, the rotating column 44, the telescopic rod 45 and the chuck 46 to rotate counterclockwise, and the chuck 46 pushes the bulldozer shovel to rotate counterclockwise, automatically changing the welding position. When the bulldozer shovel rotates counterclockwise, because the bulldozer shovel is in an elliptical arc shape, the angle between the welding gun and the bulldozer shovel gradually decreases. When the slide 42 moves to the right, the slide 42 drives the walking wheel 416 to move to the right, and the walking wheel 416 moves downhill to the right on the upper surface of the inclined plate 417, so that the left end of the operating platform 1 is lowered, and the bulldozer shovel is tilted to the left as a whole, increasing the angle between the welding gun and the bulldozer shovel, avoiding too small a welding angle, and avoiding the problem of too large or too small welding angle.

[0041] In this embodiment, specifically: the right end of the inclined plate 417 is hinged to the left side of the upper surface of the base plate 49, a slide groove 418 is opened on the left side of the upper surface of the base plate 49, the inner wall of the slide groove 418 is slidably connected with a slider 419, the upper surface of the slider 419 is fixedly connected with a lifting roller 420, the left side wall of the base plate 49 is fixedly connected with a bearing plate 421, the upper surface of the bearing plate 421 is installed with an electric cylinder 422, and one end of the piston rod of the electric cylinder 422 is fixedly connected to the left side wall of the slider 419.

[0042] Under the above setting, the slider 419 is driven to move left and right by extending and retracting one end of the piston rod of the electric cylinder 422, thereby changing the support point of the lifting roller 420 on the inclined plate 417, thereby changing the inclination angle of the inclined plate 417. In this way, when the walking wheel 416 moves the same horizontal distance on the inclined plate 417, the inclination angle of the operating platform 1 and the bulldozer will change. The smaller the inclination angle of the inclined plate 417, the greater the change in the inclination angle of the operating platform 1 and the bulldozer, thereby adjusting the size of the compensation angle to improve applicability.

[0043] The present invention also provides a method for using a support mechanism for welding a micro excavator bulldozer, comprising the following steps: S1. Place the bulldozer with its opening downward on the two supporting rollers 3, push the slide plate 52 inward, so that the ball 55 fits against the outer wall of the bulldozer, support the bulldozer through the supporting rollers 3, and clamp the right end of the bulldozer with the help of the clamp 46; S2. The piston rod of the electric cylinder 412 is retracted to drive the slide 42 and the rack 47 to move to the left, driving the gear ring 48, the rotating column 44, the telescopic rod 45 and the chuck 46 to rotate clockwise. The chuck 46 pulls the bulldozer to rotate clockwise, automatically changing the welding position. S3. When the bulldozer shovel rotates clockwise, the angle between the welding gun and the bulldozer shovel gradually increases because the bulldozer shovel is in an elliptical arc shape. When the slide 42 moves to the left, the slide 42 pushes the transmission rod 411, and the inclination angle of the transmission rod 411 decreases, which lifts up the left end of the operating platform 1, so that the bulldozer shovel is tilted to the right as a whole, reducing the angle between the welding gun and the bulldozer shovel to avoid excessive welding angle. S4. The slide 42 and the rack 47 are moved to the right by extending one end of the piston rod of the electric cylinder 412, and the gear ring 48, the rotating column 44, the telescopic rod 45 and the chuck 46 are rotated counterclockwise. The chuck 46 pulls the bulldozer shovel to rotate counterclockwise, and the welding position is automatically changed. When the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases, and the slide 42 moves to the right and pulls the transmission rod 411 at the same time. The inclination angle of the transmission rod 411 increases, and the left end of the operating platform 1 is lowered, so that the bulldozer shovel is tilted to the left as a whole, and the angle between the welding gun and the bulldozer shovel is increased, so as to avoid the welding angle being too small and realize the real-time compensation of the welding angle.

[0044] 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 support mechanism for welding a mini excavator bulldozer, characterized in that: The operating platform (1) comprises two support columns (2) symmetrically fixedly connected to the upper surface of the operating platform (1), support rollers (3) for supporting a bulldozer are installed on the top of the support columns (2), an angle compensation mechanism (4) is installed on the upper surface of the operating platform (1), and a manually operated welding gun is provided directly above the operating platform (1); The angle compensation mechanism (4) comprises a slide groove (41), wherein the slide groove (41) is provided in the middle of the upper surface of the operating table (1), and a slide seat (42) is slidably connected to the inner wall of the slide groove (41), and a rotating shaft (43) is rotatably connected between the opposite sides of the two support columns (2) via a bearing, and a rotating column (44) is fixedly connected to the middle of the outer wall of the rotating shaft (43), and a telescopic rod (45) is fixedly connected to the right side of the upper surface of the rotating column (44), and the telescopic rod (45) ) is hingedly connected to the top of a chuck (46), the upper surface of the slide seat (42) is symmetrically fixedly connected to two racks (47), the outer wall of the rotating column (44) is symmetrically fixedly connected to two toothed rings (48), the toothed rings (48) are meshingly connected to the racks (47), a bottom plate (49) is provided below the operating table (1), a vertical rod (410) is hingedly connected to the right side of the lower surface of the operating table (1), and the bottom of the vertical rod (410) is fixedly connected to the right side of the upper surface of the bottom plate (49); The angle compensation mechanism (4) also includes an adjustment component, which can tilt the operating platform (1) and the bulldozer shovel as a whole while driving the bulldozer shovel to rotate, thereby compensating for the angle change formed between the bulldozer shovel and the welding gun when the bulldozer shovel rotates.

2. The support mechanism for welding a micro excavator bulldozer according to claim 1, characterized in that: The telescopic rod (45) comprises a cylinder (451), the bottom of the cylinder (451) is fixedly connected to the right side of the upper surface of the rotating column (44), the upper surface of the cylinder (451) is provided with a circular groove (452), and the inner side wall of the circular groove (452) is slidably connected to a sliding rod (453).

3. The support mechanism for welding a micro excavator bulldozer according to claim 2, characterized in that: The chuck (46) comprises a connecting frame (461), the lower surface of the connecting frame (461) is hinged to the top of the telescopic rod (45), the upper surface of the connecting frame (461) is threadedly connected to a screw rod (462), the bottom end of the screw rod (462) is rotatably connected to a clamping plate (463) via a bearing, the top end of the screw rod (462) is fixedly connected to a knob 1 (464), and the lower surface of the clamping plate (463) and the bottom wall of the inner side wall of the connecting frame (461) are both bonded with a rubber pad (465).

4. The support mechanism for welding a micro excavator bulldozer according to claim 3, characterized in that: The adjustment component comprises a transmission rod (411), the transmission rod (411) being hinged on the left side of the lower surface of the slide seat (42), the bottom end of the transmission rod (411) being hinged on the left side of the upper surface of the bottom plate (49), an electric cylinder 1 (412) being installed on the left side wall of the operating table (1), one end of the piston rod of the electric cylinder 1 (412) passing through the left side wall of the operating table (1) and being fixedly connected to the left side wall of the slide seat (42), and when the operating table (1) is horizontal, the transmission rod (411) is in a state of tilting to the right.

5. The support mechanism for welding a micro excavator bulldozer according to claim 3, characterized in that: The adjustment assembly comprises a screw rod (413), the two ends of which are rotatably connected to the two sides of the inner wall of the slide groove (41) through bearings respectively; a motor (414) is installed on the left side wall of the operating table (1); the screw rod (413) is threadedly connected to the slide seat (42); a mounting frame (415) is fixedly connected to the middle part of the lower surface of the slide seat (42); a walking wheel (416) is installed at the bottom end of the mounting frame (415); an inclined plate (417) is provided on the left side of the upper surface of the bottom plate (49); when the operating table (1) is horizontal, the walking wheel (416) is located in the middle part of the inclined plate (417).

6. The support mechanism for welding a micro excavator bulldozer according to claim 5, characterized in that: The right end of the inclined plate (417) is hinged to the left side of the upper surface of the base plate (49); a second slide groove (418) is provided on the left side of the upper surface of the base plate (49); a slider (419) is slidably connected to the inner wall of the second slide groove (418); a lifting roller (420) is fixedly connected to the upper surface of the slider (419); a bearing plate (421) is fixedly connected to the left side wall of the base plate (49); an electric cylinder (422) is installed on the upper surface of the bearing plate (421); and one end of the piston rod of the electric cylinder (422) is fixedly connected to the left side wall of the slider (419).

7. The support mechanism for welding a micro excavator bulldozer according to claim 4 or 6, characterized in that: A positioning mechanism (5) is installed on the outer side wall of the operating table (1), and the positioning mechanism (5) comprises two blind grooves (51), the two blind grooves (51) are symmetrically arranged on the outer side wall of the operating table (1), and the inner side wall of the blind groove (51) is slidably connected with a slide plate (52), and the end of the slide plate (52) away from the operating table (1) is fixedly connected with a vertical plate (53), and the side of the vertical plate (53) close to the operating table (1) is evenly fixedly connected with a mounting column (54), and the end of the mounting column (54) away from the vertical plate (53) is provided with a ball (55).

8. The support mechanism for welding a micro excavator bulldozer according to claim 7, characterized in that: The lower surface of the operating table (1) is symmetrically threaded with two push rods (56), and the bottom end of the push rod (56) is fixedly connected to a second knob (57).

9. The support mechanism for welding a micro excavator bulldozer according to claim 8, characterized in that: The outer side wall of the bottom plate (49) is evenly and fixedly connected with a mounting block (6), and a mounting hole (7) is provided on the lower surface of the mounting block (6).

10. A method for using the support mechanism for welding a micro excavator bulldozer according to claim 9, characterized in that: The following steps are involved: S1. Place the bulldozer with its opening downward on two supporting rollers (3), push the slide plate (52) inward, so that the ball bearings (55) fit the outer wall of the bulldozer, support the bulldozer through the supporting rollers (3), and clamp the right end of the bulldozer with the help of the clamp (46); S2, retracting one end of the piston rod of the electric cylinder 1 (412) to drive the slide seat (42) and the rack (47) to move leftward, driving the gear ring (48), the rotating column (44), the telescopic rod (45) and the chuck (46) to rotate clockwise, and the chuck (46) pulls the bulldozer to rotate clockwise, automatically changing the welding position; S3. When the bulldozer shovel rotates clockwise, the angle between the welding gun and the bulldozer shovel gradually increases because the bulldozer shovel is in an elliptical arc shape. When the slide seat (42) moves to the left, the slide seat (42) pushes the transmission rod (411), and the inclination angle of the transmission rod (411) decreases, so that the left end of the operating table (1) is lifted up, and the bulldozer shovel is tilted to the right as a whole, thereby reducing the angle between the welding gun and the bulldozer shovel and avoiding an excessively large welding angle. S4. The slide seat (42) and the rack (47) are moved to the right by extending one end of the piston rod of the electric cylinder (412), thereby driving the gear ring (48), the rotating column (44), the telescopic rod (45) and the chuck (46) to rotate counterclockwise. The chuck (46) pulls the bulldozer shovel to rotate counterclockwise, automatically changing the welding position. When the bulldozer shovel rotates counterclockwise, the angle between the welding gun and the bulldozer shovel gradually decreases. The slide seat (42) moves to the right and pulls the transmission rod (411) at the same time. The inclination angle of the transmission rod (411) increases, lowering the left end of the operating table (1) so that the bulldozer shovel is tilted to the left as a whole, increasing the angle between the welding gun and the bulldozer shovel, avoiding an excessively small welding angle, and realizing real-time compensation of the welding angle.

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