An automatic assembling tooling for the chassis of an articulated vehicle

Abstract

The present invention discloses an automatic assembly tool for an articulated vehicle chassis, belonging to the technical field of articulated vehicle chassis assembly. It includes a base assembly. The base assembly is cross-shaped when viewed from above. A bottom plate clamping and positioning assembly is fixedly connected to the middle of the base assembly. A front desk clamping and positioning assembly is fixedly connected to one end of the base assembly, and a back desk clamping and positioning assembly is fixedly connected to the other end. A left side plate clamping and positioning assembly is fixedly connected to one side of the base assembly, and a right side plate clamping and positioning assembly is fixedly connected to the other side. Encoders and proximity switches are installed at the moving, clamping, and positioning parts of the bottom plate clamping and positioning assembly, the front desk clamping and positioning assembly, the back desk clamping and positioning assembly, the left side plate clamping and positioning assembly, and the right side plate clamping and positioning assembly. The advantages of the present invention are: high assembly efficiency, safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of boom truck chassis assembly, and specifically refers to an automatic assembly tool for boom truck chassis. Background Art

[0002] In recent years, the construction machinery industry has developed rapidly, and the degree of automation in welding production has also been greatly improved.

[0003] An assembly tool, as the name implies, is to assemble multiple parts or components into a whole through clamping.

[0004] At present, most of the boom truck chassis assembly tools in the industry are still manual mechanical tools, which require manual operation, are cumbersome to operate, have poor compatibility, and low production efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is the technical problem mentioned in the above background art. It provides an automatic assembly tool for boom truck chassis, which can realize the assembly and clamping of workpieces of multiple models, and the clamping and assembly of each component are automatic, with good compatibility, high assembly efficiency, and safety and reliability.

[0006] The technical solution provided by the present invention is: an automatic assembly tool for boom truck chassis, including a base assembly. The base assembly is cross-shaped when viewed from above. A bottom plate clamping and positioning assembly is fixedly connected to the middle of the base assembly. A front desk clamping and positioning assembly is fixedly connected to one end of the base assembly, and a rear desk clamping and positioning assembly is fixedly connected to the other end. A left side plate clamping and positioning assembly is fixedly connected to one side of the base assembly, and a right side plate clamping and positioning assembly is fixedly connected to the other side. Encoders and proximity switches are installed at the moving, clamping, and positioning parts of the bottom plate clamping and positioning assembly, the front desk clamping and positioning assembly, the rear desk clamping and positioning assembly, the left side plate clamping and positioning assembly, and the right side plate clamping and positioning assembly.

[0007] In some embodiments, the front desk clamping and positioning assembly includes a front desk bottom bracket fixed to the base assembly. A front desk servo moving assembly is fixedly connected to the upper end of the front desk bottom bracket. A front desk sliding plate is movably connected to the upper end of the front desk servo moving assembly. A front desk backstop assembly is fixedly connected to one end of the front desk sliding plate, and a front desk hydraulic jacking assembly is fixedly connected to the other end. A front desk hydraulic clamping assembly is also provided between the front desk backstop assembly and the front desk hydraulic jacking assembly. The front desk hydraulic clamping assembly is horizontally fixed on the front desk sliding plate. Front desk hydraulic clamping plates I and II are movably connected to both sides of the upper end of the front desk hydraulic clamping assembly.

[0008] In some embodiments, the front-stage servo moving component drives the front-stage cross slide to move horizontally. The front-stage hydraulic clamping component uses a hydraulic motor to drive a trapezoidal lead screw to rotate, thereby driving the nut mounted on the lead screw and the front-stage hydraulic clamping backing plate I and front-stage hydraulic clamping backing plate II connected to the nut to perform centering and clamping movements. The hydraulic jacking component uses a hydraulic cylinder to perform horizontal telescopic movements, thereby jacking the front stage against the front-stage backing component.

[0009] In some embodiments, the rear-stage clamping and positioning component includes a rear-stage servo moving component fixedly connected to the base component. The upper end of the rear-stage servo moving component is movably connected to a rear-stage servo centering moving component. The upper ends of both sides of the rear-stage servo centering moving component are movably connected to a rear-stage servo lifting component I and a rear-stage servo lifting component II respectively. The sides of the rear-stage servo lifting component I and the rear-stage servo lifting component II close to each other are respectively movably connected to a rear-stage hydraulic clamping component I and a rear-stage hydraulic clamping component II up and down. The upper end of the rear-stage hydraulic clamping component I is movably connected to a rear-stage clamping plate I and a rear-stage clamping plate II in a centering manner. The upper end of the rear-stage hydraulic clamping component II is movably connected to a rear-stage clamping plate III and a rear-stage clamping plate IV in a centering manner.

[0010] In some embodiments, the left-side plate clamping and positioning component includes a left-side bottom bracket fixedly connected to the base component. The upper end of the left-side bottom bracket is horizontally slidably connected to a left-side hydraulic moving cross slide component. On the upper end of the left-side hydraulic moving cross slide component, both sides close to the center of the base component are respectively fixedly connected to a left-side magnetic attraction pressing component I and a left-side magnetic attraction pressing component II. A left-side moving hydraulic cylinder is connected to the side of the left-side hydraulic moving cross slide component far from the center of the base component. The left-side hydraulic moving cross slide component can be horizontally moved on the left-side bottom bracket through the left-side moving hydraulic cylinder;

[0011] The left-side magnetic attraction pressing component II includes a left-side vertical plate fixedly connected to the left-side hydraulic moving cross slide component. A left-side magnetic device is fixedly connected to one side of the left-side vertical plate. The other side is connected to a left-side pressing block through a vertical guide rail and a slider. A vertical left-side downward pressing hydraulic cylinder is connected to one side of the left-side pressing block. The left-side magnetic attraction pressing component I has the same structure as the left-side magnetic attraction pressing component II;

[0012] The right-side plate clamping and positioning component has the same structure as the left-side plate clamping and positioning component, and the positions of the right-side plate clamping and positioning component and the left-side plate clamping and positioning component are arranged oppositely.

[0013] In some embodiments, the bottom plate clamping and positioning component includes a bottom plate bottom bracket fixedly connected to the base component. Servo electric cylinder adjustment components are fixedly connected to all four corners of the upper end of the bottom plate bottom bracket. A bottom plate hydraulic inner circle centering component is fixedly connected to the middle of the upper end of the bottom plate bottom bracket. A bottom plate hydraulic jacking component is fixedly connected to one side of the upper end of the bottom plate bottom bracket.

[0014] In some embodiments, the servo cylinder adjustment assembly includes a vertically installed cylinder and a cushion block mounted on the top of the telescopic rod of the cylinder. The cylinder drives the cushion block to move up and down, keeping the cushion blocks at the four corners at the same suitable height, so as to keep the bottom plate horizontal.

[0015] In some embodiments, the hydraulic inner circle centering assembly of the bottom plate uses a hydraulic motor to drive a trapezoidal lead screw to rotate, thereby driving the nut mounted on the lead screw and the bottom plate centering slide plate I and the bottom plate centering slide plate II connected to the nut to perform a reverse inner support and tightening movement. Positioning columns I and II are symmetrically installed at the upper ends of the bottom plate centering slide plate I and the bottom plate centering slide plate II. By moving away from the positioning columns I and II, the bottom plate with a circular hollow sleeved on the positioning columns I and II is positioned.

[0016] In some embodiments, the hydraulic tightening assembly of the bottom plate uses a hydraulic motor to drive a trapezoidal lead screw to rotate, thereby driving the nut mounted on the lead screw and the bottom plate tightening slide plate connected to the nut to move horizontally. A positioning block is fixedly connected to the bottom plate tightening slide plate, and the bottom plate tightening slide plate drives the positioning block to move horizontally so that the positioning block tightly presses the side of the bottom plate.

[0017] In some embodiments, the base assembly includes a base bracket and an adjusting screw assembly. There are multiple adjusting screw assemblies, which are evenly distributed and fixedly connected to the periphery of the base bracket for adjusting the levelness of the base bracket. Multiple screw holes and pin holes are provided on the base bracket.

[0018] The advantages of the present invention compared with the prior art are as follows: 1. For this automatic assembly tooling, through full-automatic clamping, automatic accurate positioning, and in cooperation with the loading and unloading truss and automatic welding equipment, the automatic production of the boom truck chassis workpiece is realized, improving the product production quality and production efficiency; 2. Encoders and proximity switches are integrated in the moving, clamping, and positioning parts of each component to ensure high precision when each component is assembled; 3. Each clamping component adopts hydraulic clamping, with a large clamping load, ensuring that the assembly tooling can be compatible with workpieces with a large load.

[0019] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the automatic assembly tooling for the boom truck chassis according to an embodiment of the present invention;

[0021] Figure 2 is Figure 1 a schematic structural diagram of the front clamping and positioning assembly shown in

[0022] Figure 3 is Figure 1 a schematic structural diagram of the rear clamping and positioning assembly shown in

[0023] Figure 4 is Figure 1 The schematic structural diagram of the left side plate clamping and positioning assembly shown in

[0024] Figure 5 is Figure 1 The schematic structural diagram of the right side plate clamping and positioning assembly shown in

[0025] Figure 6 is Figure 1 The schematic structural diagram of the bottom plate clamping and positioning assembly shown in

[0026] Figure 7 is Figure 1 The schematic structural diagram of the base assembly shown in

[0027] Figure 8 It is the schematic diagram when the automatic teaming tooling of the boom truck chassis in the embodiment of the present invention is working.

[0028] In the attached drawings: 1. Front desk clamping and positioning assembly; 2. Rear desk clamping and positioning assembly; 3. Left side plate clamping and positioning assembly; 4. Right side plate clamping and positioning assembly; 5. Bottom plate clamping and positioning assembly; 6. Base assembly;

[0029] 11. Front desk bottom bracket; 12. Front desk servo moving assembly; 13. Front desk hydraulic clamping assembly; 131. Front desk hydraulic clamping backing plate I; 132. Front desk hydraulic clamping backing plate II; 14. Front desk backrest assembly; 15. Front desk hydraulic jacking assembly; 16. Front desk sliding plate;

[0030] 21. Rear desk servo moving assembly; 22. Rear desk servo centering moving assembly; 23. Rear desk servo lifting assembly I; 24. Rear desk servo lifting assembly II; 25. Rear desk hydraulic clamping assembly I; 251. Rear desk clamping plate I; 252. Rear desk clamping plate II; 26. Rear desk hydraulic clamping assembly II; 261. Rear desk clamping plate III; 262. Rear desk clamping plate IV;

[0031] 31. Left bottom bracket; 32. Left hydraulic moving sliding plate assembly; 33. Left magnetic adsorption pressing assembly I; 34. Left magnetic adsorption pressing assembly II; 341. Left magnetic device; 342. Left pressing block; 343. Left lower pressing oil cylinder; 344. Left cushion block; 35. Left moving hydraulic cylinder;

[0032] 41. Right bottom bracket; 42. Right hydraulic moving sliding plate assembly; 43. Right magnetic adsorption pressing assembly I; 44. Right magnetic adsorption pressing assembly II; 45. Right moving hydraulic cylinder;

[0033] 51. Bottom plate bottom bracket; 52. Bottom plate hydraulic inner circle centering component; 521. Centering slide plate I; 522. Centering slide plate II; 523. Positioning column I; 524. Positioning column II; 53. Bottom plate hydraulic clamping component; 531. Bottom plate clamping slide plate; 532. Positioning block; 54. Servo electric cylinder adjustment component; 541. Telescopic electric cylinder; 542. Spacer block.

[0034] 61. Base bracket; 62. Adjusting screw component. Detailed implementation mode

[0035] The following further elaborates on the present invention.

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0037] Combined with Figure 1 As shown, an automatic assembly tool for an articulated vehicle chassis includes a front clamping and positioning component 1, a rear clamping and positioning component 2, a left side plate clamping and positioning component 3, a right side plate clamping and positioning component 4, a bottom plate clamping and positioning component 5, and a base component 6; encoders and proximity switches are installed on the moving, clamping, and positioning parts of the bottom plate clamping and positioning component 5, the front clamping and positioning component 1, the rear clamping and positioning component 2, the left side plate clamping and positioning component 3, and the right side plate clamping and positioning component 4 to ensure high precision during the assembly of each component.

[0038] Combined with Figure 7 As shown, the base component 6 includes a base bracket 61 and an adjusting screw component 62. There are twelve adjusting screw components 62, which are evenly distributed and fixedly connected to the peripheral edge of the base bracket 61. Threaded holes are provided on the ear plates of the adjusting screw components 62, and screws are installed in the threaded holes. The levelness of the base bracket 61 can be adjusted by rotating the screws.

[0039] Multiple threaded holes and pin holes are provided on the base bracket 61. The threaded holes are used for fixedly connecting each clamping and positioning component, and the pin holes are used for positioning each clamping and positioning component. In a top-down view, the base bracket 61 is in a cross shape, and the middle is connected to the bottom plate bottom bracket 51 by screws. The front and rear ends are respectively connected to the front bottom bracket 11 and the rear servo moving component 21 by screws, and the left and right ends are respectively connected to the left bottom bracket 31 and the right bottom bracket 41 by screws.

[0040] Combined with Figure 2As shown in the figure, the front clamping and positioning assembly 1 includes a front bottom bracket 11 that is screwed and fixed to the base bracket 61. The upper end of the front bottom bracket 11 is screwed and fixed with a front servo moving assembly 12. The front servo moving assembly 12 is connected to the front slide 16 through a lead screw and a nut. One end of the front slide 16 is screwed and fixed with a front backrest assembly 14, and the other end is screwed and fixed with a front hydraulic tightening assembly 15. A front hydraulic clamping assembly 13 is screwed and fixed between the front backrest assembly 14 and the front hydraulic tightening assembly 15. The front hydraulic clamping assembly 13 is horizontally fixed on the front slide 16. The upper ends on both sides of the front hydraulic clamping assembly 13 are connected to a front hydraulic clamping plate I 131 and a front hydraulic clamping plate II 132 through a lead screw and a nut.

[0041] The front servo moving assembly 12 uses a servo motor to drive the lead screw to rotate, thereby driving the nut on the lead screw and the front slide 16 connected to the nut to move horizontally, so as to drive the front backrest assembly 14, the front hydraulic tightening assembly 15 and the front hydraulic clamping assembly 13 to move as a whole.

[0042] The front hydraulic clamping assembly 13 uses a hydraulic motor to drive the trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the front hydraulic clamping plate I 131 and the front hydraulic clamping plate II 132 connected to the nut to perform centering and clamping movements.

[0043] The hydraulic tightening assembly uses a hydraulic cylinder to perform horizontal telescopic movement, so as to tightly press the front against the front backrest assembly 14.

[0044] During specific implementation, in combination with Figure 8 As shown in the figure, the truss gripper grabs the front assembly from the rack and places it on the front hydraulic clamping assembly 13 in the front clamping and positioning assembly 1. The hydraulic motor of the front hydraulic clamping assembly 13 drives the trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the front hydraulic clamping plate I 131 and the front hydraulic clamping plate II 132 connected to the nut to perform centering and clamping movements. At this time, the positioning in the width direction of the front assembly is completed; then, the front hydraulic tightening assembly 15 tightly presses the front assembly against the front backrest assembly 14. At this time, the clamping and positioning of the front assembly is completed.

[0045] In combination with Figure 3As shown in the figure, the background clamping and positioning assembly 2 includes a background servo moving assembly 21 fixedly connected to the base bracket 61. The background servo moving assembly 21 is connected to the background servo centering and moving assembly 22 through a lead screw, a nut, and a sliding plate. The background servo centering and moving assembly 22 can move horizontally back and forth. The upper ends of both sides of the background servo centering and moving assembly 22 are also connected to the background servo lifting assembly I 23 and the background servo lifting assembly II 24 through a lead screw and a nut. The background servo lifting assembly I 23 and the background servo lifting assembly II 24 can move horizontally left and right on the background servo centering and moving assembly 22. The right side of the background servo lifting assembly I 23 is connected to the background hydraulic clamping assembly I 25 through a vertical lead screw and a nut. The left side of the background servo lifting assembly II 24 is connected to the background hydraulic clamping assembly II 26 through a vertical lead screw and a nut. The background hydraulic clamping assembly I 25 and the background hydraulic clamping assembly II 26 can move up and down driven by a servo motor. The background hydraulic clamping assembly I 25 and the background hydraulic clamping assembly II 26 have the same structure as the front hydraulic clamping assembly 13. The upper end of the background hydraulic clamping assembly I 25 is connected with a background clamping plate I 251 and a background clamping plate II 252 that can move centrically. The upper end of the background hydraulic clamping assembly II 26 is connected with a background clamping plate III 261 and a background clamping plate IV 262 that can move centrically.

[0046] During specific implementation, in combination with Figure 8 As shown in the figure, the truss gripper grabs the background assembly from the rack and places it at the specified position of the background clamping and positioning assembly 2. Select the program according to the workpiece model. Through the background servo centering and moving assembly 22, the background servo lifting assembly I 23, the background hydraulic clamping assembly I 25, the background servo lifting assembly II 24, and the background hydraulic clamping assembly II 26 are centered and moved to the program-specified position; the servo motor of the background servo lifting assembly I 23 drives the lead screw to rotate, thereby driving the nut installed on the lead screw and the sliding plate connected to the nut. The sliding plate drives the background hydraulic clamping assembly I 25 installed on it to move up and down to the program-specified position through the guide rail slider; similarly, the servo motor of the background servo lifting assembly II 24 drives the lead screw to rotate, thereby driving the nut installed on the lead screw and the sliding plate connected to the nut. The sliding plate drives the background hydraulic clamping assembly II 26 installed on it to move up and down to the program-specified position through the guide rail slider; the hydraulic motors of the background hydraulic clamping assembly I 25 and the background hydraulic clamping assembly II 26 drive the trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the sliding plate connected to the nut to perform centering and clamping movement. At this time, the background assembly is clamped and positioned.

[0047] In combination with Figure 4As shown in the figure, the left plate clamping and positioning assembly 3 includes a left bottom bracket 31 fixedly connected to the base bracket 61. The upper end of the left bottom bracket 31 is connected to the left hydraulic moving slide plate assembly 32 through a horizontal slide rail and a slider. At the upper end of the left hydraulic moving slide plate assembly 32, a left magnetic adsorption pressing assembly I 33 and a left magnetic adsorption pressing assembly II 34 are fixedly connected towards the right. On the left side of the middle of the slide plate of the left hydraulic moving slide plate assembly 32, a left moving hydraulic cylinder 35 is installed. Through the left moving hydraulic cylinder 35, the slide rail and the slider, the left hydraulic moving slide plate assembly 32 can move horizontally on the left bottom bracket 31.

[0048] Combined with Figure 5 As shown in the figure, the right plate clamping and positioning assembly 4 has the same structure as the left plate clamping and positioning assembly 3, and the positions of the right plate clamping and positioning assembly 4 and the left plate clamping and positioning assembly 3 are arranged oppositely.

[0049] During specific implementation, combined with Figure 8 As shown in the figure, the truss gripper grabs the left plate assembly from the rack and places it on the left cushion block 344 of the left hydraulic moving slide plate assembly 32, and adsorbs it through the electro-permanent magnets (left magnetic devices 341) installed in the left magnetic adsorption pressing assembly I 33 and the left magnetic adsorption pressing assembly II 34. At this time, the adsorption and positioning of the left plate assembly are completed;

[0050] Perform the same operation on the right plate assembly, and the right plate clamping and positioning assembly 4 adsorbs and positions the right plate assembly.

[0051] Combined with Figure 6 As shown in the figure, the bottom plate clamping and positioning assembly 5 includes a bottom plate bottom bracket 51 fixedly connected to the base bracket 61 by screws. At the four corners of the upper end of the bottom plate bottom bracket 51, servo electric cylinder adjustment assemblies 54 are fixedly connected by screws. In the middle of the upper end of the bottom plate bottom bracket 51, a bottom plate hydraulic inner circle centering assembly 52 is fixedly connected by screws. On the left side of the upper end of the bottom plate bottom bracket 51, a bottom plate hydraulic tightening assembly 53 is fixedly connected by screws.

[0052] The servo electric cylinder adjustment assembly 54 includes a vertically installed electric cylinder and a cushion block 542 installed at the top of the telescopic rod of the electric cylinder. The electric cylinder drives the cushion block 542 to move up and down to keep the cushion blocks 542 at the four corners at the same suitable height, so as to keep the bottom plate horizontal.

[0053] The bottom plate hydraulic inner circle centering component 52 uses a hydraulic motor to drive a trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the bottom plate centering slide plate I 521 and the bottom plate centering slide plate II 522 connected to the nut to perform a reverse inner support and tightening movement. The upper ends of the bottom plate centering slide plate I 521 and the bottom plate centering slide plate II 522 are symmetrically fixed with a positioning column I 523 and a positioning column II 524 by screws. By moving away from the positioning column I 523 and the positioning column II 524, the bottom plate with a circular hollow sleeved on the positioning column I 523 and the positioning column II 524 is positioned.

[0054] The bottom plate hydraulic tightening component 53 uses a hydraulic motor to drive a trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the bottom plate tightening slide plate 531 connected to the nut to move horizontally. A positioning block 532 is fixedly connected to the bottom plate tightening slide plate 531. The bottom plate tightening slide plate 531 drives the positioning block 532 to move horizontally so that the positioning block 532 tightens the side of the bottom plate.

[0055] In specific implementation, in combination with Figure 8 As shown, the truss gripper grabs the bottom plate assembly from the bottom plate assembly alignment fixture and places it on the cushion block 542 on the servo electric cylinder adjustment component 54. The cushion block 542 moves to the specified height position through the servo electric cylinder before the bottom plate assembly arrives, ensuring that the upper reference surface heights of bottom plate assemblies with different thicknesses are the same.

[0056] For the bottom plate hydraulic inner circle centering component 52, the hydraulic motor drives the trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the bottom plate centering slide plate I 521 and the bottom plate centering slide plate II 522 connected to the nut to perform a reverse inner support and tightening movement to center the hollow inner circle of the bottom plate assembly.

[0057] For the bottom plate hydraulic tightening component 53, the hydraulic motor drives the trapezoidal lead screw to rotate, thereby driving the nut installed on the lead screw and the bottom plate tightening slide plate 531 connected to the nut to perform a tightening movement. The positioning block 532 fixed on the bottom plate tightening slide plate 531 restricts the degree of freedom of the bottom plate assembly in the circumferential direction. At this time, the clamping and positioning of the bottom plate assembly are completed.

[0058] After clamping the bottom plate, the left side plate, the right side plate, the front stage and the back stage,

[0059] S1. The servo motor of the front stage servo moving component 12 drives the lead screw to rotate, thereby driving the nut installed on the lead screw and the front stage slide plate 16 connected to the nut to move horizontally through the guide rail slider to move the front stage component to the position specified by the program;

[0060] S2. The servo motor of the back stage servo moving component 21 drives the lead screw to rotate, thereby driving the nut installed on the lead screw and the slide plate and the back stage servo centering and moving component 22 connected to the nut to move horizontally through the guide rail slider to move the back stage component to the position specified by the program;

[0061] S3, the hydraulic cylinder of the left hydraulic movable slide assembly 32 is extended, and the left hydraulic movable slide assembly 32 is driven to move horizontally through the guide rail slider to press the left plate assembly tightly against the left side of the bottom plate assembly and the front and rear stage assemblies;

[0062] S4. Similar to S3, push the right side panel tightly against the right side of the bottom plate assembly and the front and back assembly;

[0063] S5. The left side downward pressure cylinder 343 of the left side magnetic clamping assembly II 34 contracts, driving the left side pressure block 342 to press downward, and the left side magnetic clamping assembly I 33 also performs the same action at the same time, pressing the bent portion on the upper end of the left side plate, so that the portion is close to the upper end of the bottom plate assembly; similarly, the left side magnetic clamping assembly I 33 and the left side magnetic clamping assembly II 34 press the bent portion on the upper end of the right side plate, so that the portion is close to the upper end of the bottom plate assembly;

[0064] S6. At this point, the positioning and clamping of the various parts of the boom truck chassis workpiece are completed, and the welding robot starts spot welding according to the selection program.

[0065] S7. After spot welding is completed, the front plate clamping and positioning assembly 1, the back plate clamping and positioning assembly 2, the left plate clamping and positioning assembly 3, and the right plate clamping and positioning assembly 4 move to the loading position respectively, and the truss gripper automatically unloads the workpiece. At this point, the automatic pairing of a workpiece is completed and waits for the next workpiece to be loaded.

[0066] Although the 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 claims and their equivalents.

Claims

1. An automatic assembly tool for a boom truck chassis, characterized in that: The invention comprises a base assembly (6), wherein the base assembly (6) is in a cross shape when viewed from above, wherein a bottom plate clamping and positioning assembly (5) is fixedly connected to the middle of the base assembly (6), wherein one end of the base assembly (6) is fixedly connected to the front plate clamping and positioning assembly (1), and the other end is fixedly connected to the back plate clamping and positioning assembly (2), wherein one side of the base assembly (6) is fixedly connected to the left plate clamping and positioning assembly (3), and the other side is fixedly connected to the right plate clamping and positioning assembly (4), and encoders and proximity switches are installed at the moving, clamping and positioning parts of the bottom plate clamping and positioning assembly (5), the front plate clamping and positioning assembly (1), the back plate clamping and positioning assembly (2), the left plate clamping and positioning assembly (3) and the right plate clamping and positioning assembly (4); The bottom plate clamping and positioning assembly (5) comprises a bottom plate bracket (51) fixedly connected to the base assembly (6); the four corners of the upper end of the bottom plate bracket (51) are fixedly connected to servo electric cylinder adjustment assemblies (54); the middle of the upper end of the bottom plate bracket (51) is fixedly connected to a bottom plate hydraulic inner circle centering assembly (52); and one side of the upper end of the bottom plate bracket (51) is fixedly connected to a bottom plate hydraulic jacking assembly (53); The front desk clamping and positioning assembly (1) comprises a front desk bottom bracket (11) fixed to a base assembly (6); the upper end of the front desk bottom bracket (11) is fixedly connected to a front desk servo moving assembly (12); the upper end of the front desk servo moving assembly (12) is movably connected to a front desk slide (16); one end of the front desk slide (16) is fixedly connected to a front desk backrest assembly (14); the other end is fixedly connected to a front desk hydraulic jacking assembly (15); a front desk hydraulic clamping assembly (13) is further provided between the front desk backrest assembly (14) and the front desk hydraulic jacking assembly (15); the front desk hydraulic clamping assembly (13) is transversely fixed to the front desk slide (16); the upper ends of the front desk hydraulic clamping assembly (13) are movably connected to a front desk hydraulic clamping backing plate I (131) and a front desk hydraulic clamping backing plate II (132); The background clamping and positioning component (2) comprises a background servo moving component (21) fixedly connected to the base component (6); the upper end of the background servo moving component (21) is movably connected to the background servo centering moving component (22); the upper ends of the background servo centering moving component (22) are movably connected to the background servo lifting component I (23) and the background servo lifting component II (24); the sides of the background servo lifting component I (23) and the background servo lifting component II (24) close to each other are respectively connected to the background hydraulic clamping component I (25) and the background hydraulic clamping component II (26) in a manner that they can move up and down; the upper end of the background hydraulic clamping component I (25) is movably connected to the background clamping plate I (251) and the background clamping plate II (252); the upper end of the background hydraulic clamping component II (26) is movably connected to the background clamping plate III (261) and the background clamping plate IV (262).

2. The automatic assembly tool for the boom truck chassis according to claim 1 is characterized in that: The front desk servo moving component (12) drives the front desk slide (16) to move horizontally, and the front desk hydraulic clamping component (13) uses a hydraulic motor to drive the trapezoidal screw to rotate, thereby driving the nut installed on the screw and the front desk hydraulic clamping plate I (131) and the front desk hydraulic clamping plate II (132) connected to the nut to perform centering clamping movement, and the hydraulic pressing component uses a hydraulic cylinder to perform horizontal telescopic movement, thereby pressing the front desk onto the front desk backing component (14).

3. The automatic assembly tool for the boom truck chassis according to claim 1 is characterized in that: The left side plate clamping and positioning assembly (3) comprises a left side bottom bracket (31) fixedly connected to the base assembly (6); the upper end of the left side bottom bracket (31) is horizontally slidably connected to a left side hydraulic movable slide assembly (32); the upper end of the left side hydraulic movable slide assembly (32) is respectively fixedly connected to a left side magnetic clamping assembly I (33) and a left side magnetic clamping assembly II (34) on both sides close to the center of the base assembly (6); the left side hydraulic movable slide assembly (32) is connected to a left side movable hydraulic cylinder (35) away from the center of the base assembly (6); and the left side hydraulic movable slide assembly (32) can be horizontally moved on the left side bottom bracket (31) by the left side movable hydraulic cylinder (35); The left magnetic clamping assembly II (34) comprises a left vertical plate, the left vertical plate is fixedly connected to the left hydraulic movable slide assembly (32), one side of the left vertical plate is fixedly connected to a left magnetic device (341), and the other side is connected to a left pressure block (342) via a vertical guide rail and a slide block, one side of the left pressure block (342) is connected to a vertical left downward pressure cylinder (343), and the left magnetic clamping assembly I (33) has the same structure as the left magnetic clamping assembly II (34); The right side plate clamping and positioning assembly (4) and the left side plate clamping and positioning assembly (3) have the same structure, and the right side plate clamping and positioning assembly (4) and the left side plate clamping and positioning assembly (3) are arranged relative to each other.

4. The automatic assembly tool for the boom truck chassis according to claim 1 is characterized in that: The servo electric cylinder adjustment assembly (54) comprises a vertically mounted electric cylinder and a cushion block (542) mounted on the top of the electric cylinder telescopic rod, wherein the electric cylinder drives the cushion block (542) to move up and down, keeping the cushion blocks (542) at the four corners at the same suitable height, thereby keeping the bottom plate level.

5. The automatic assembly tool for the boom truck chassis according to claim 1 is characterized in that: The bottom plate hydraulic inner circle centering assembly (52) uses a hydraulic motor to drive the trapezoidal screw to rotate, thereby driving the nut installed on the screw and the bottom plate centering slide plate I (521) and the bottom plate centering slide plate II (522) connected by the nut to perform reverse inward supporting and tightening movement. The upper ends of the bottom plate centering slide plate I (521) and the bottom plate centering slide plate II (522) are symmetrically installed with positioning columns I (523) and positioning columns II (524). The positioning columns I (523) and the positioning columns II (524) move away from each other, so that the bottom plate with a circular hollow space mounted on the positioning columns I (523) and the positioning columns II (524) is positioned.

6. The automatic assembly tool for the boom truck chassis according to claim 1 is characterized in that: The bottom plate hydraulic tightening assembly (53) uses a hydraulic motor to drive a trapezoidal screw to rotate, thereby driving a nut mounted on the screw and a bottom plate tightening slide (531) connected to the nut to move horizontally. A positioning block (532) is fixedly connected to the bottom plate tightening slide (531). The bottom plate tightening slide (531) drives the positioning block (532) to move horizontally so that the positioning block (532) presses against the side of the bottom plate.

7. The automatic assembly tool for the boom truck chassis according to claim 1 is characterized in that: The base assembly (6) comprises a base support (61) and an adjustment wire assembly (62). The adjustment wire assembly (62) has a plurality of components that are evenly distributed and fixedly connected to the periphery of the base support (61) and are used to adjust the horizontality of the base support (61). The base support (61) is provided with a plurality of screw holes and pin holes.

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