CN217859599U - Automatic welding device of suspension box - Google Patents

Abstract

The utility model discloses an automatic welder of suspension box belongs to sub vehicle frame technical field. The device includes welding frock and welding robot, the welding frock includes the workstation, the bottom plate bearing structure, apron location structure, locating hole location structure, apron bearing structure and apron compact structure, the bottom plate bearing structure includes the support column, a plurality of bottom plate supporting shoes and two bottom plate locating pieces, apron location structure includes three pneumatic ejector pin, locating hole location structure includes locating pin and location cylinder, apron bearing structure includes the slide, preceding top cylinder, the apron supports and two apron locating pieces, apron compact structure includes the riser, the lift cylinder, the lifter plate, briquetting and nut mounting. The device can automatically realize the positioning of the bottom plate, the cover plate and the positioning nut, can automatically realize the assembly among the bottom plate, the cover plate and the positioning nut, and can improve the working efficiency.

Description

Automatic welding device of suspension box

Technical Field

The utility model belongs to the technical field of the sub vehicle frame, in particular to automatic welder of suspension box.

Background

The auxiliary frame is a middle buffer body connected with the vehicle body and the suspension, is a very important safety and achievement part in a car and an SUV chassis, supports the load mass of a front shaft load spring, isolates the vibration of a driving unit, and bears and transmits the force generated in the driving of the car. Patent as application number CN201921666662.7 discloses an auxiliary frame, including the body, the left and right sides of body all has vehicle body connected support, still has the suspension box that is connected with automobile engine on the body, the suspension box is located between the left and right sides vehicle body connected support, still be equipped with horizontal reinforcing plate on the body, the both ends of horizontal reinforcing plate link to each other with the vehicle body connected support of suspension box left and right sides respectively, the middle part of horizontal reinforcing plate still links to each other with the suspension box. Suspension boxes are used in prior art sub-frames. As shown in fig. 1-3, the existing suspension box includes a bottom plate 1, a cover plate 2 on the upper side of the bottom plate 1, a lower groove 5 protruding upwards in the middle of the bottom plate 1, a positioning nut 4 in an upper groove 6 and an upper groove 6 protruding downwards at the top of the cover plate 2, the bottom plate 1 is an isosceles trapezoid plate, the rear side of the cover plate 2 is open, the upper groove 6 is located right above the lower groove 5, positioning holes 3 are respectively arranged in the middle of the lower groove 5 and the upper groove 6, positioning holes 3 on the lower groove 5, positioning holes 3 (positioning nuts 4 are arranged around the positioning holes 3) and positioning nuts 4 of the upper groove 6 are all located on the same vertical line. The prior art does not provide a welding tool of the suspension box, and the suspension box is completely clamped and welded by manpower, so that time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the embodiment of the utility model provides an automatic welder of suspension box is used for the processing of suspension box specially, promotes work efficiency. The technical scheme is as follows:

the embodiment of the utility model provides an automatic welder of suspension box, the device include welding frock and the welding robot next door, the welding frock includes workstation 7 and the bottom plate bearing structure, apron location structure, locating hole location structure, apron bearing structure and apron compact structure on it, the bottom plate bearing structure includes support column 9 of lower recess 5 downside, bottom plate 1 downside and encircles a plurality of bottom plate supporting shoes 8 of support column 9 and two bottom plate locating pieces 25 of bottom plate 1 rear end left and right sides, bottom plate 1 level is arranged in bottom plate supporting shoe 8 and its rear end top leans on the front side of bottom plate locating piece 25, the upper end of support column 9 is located lower recess 5 and is leaned on lower recess 5; the cover plate positioning structure comprises three pneumatic ejector rods 12 which are respectively positioned at the front, the left side and the right side of the cover plate 2 and can move towards the cover plate 2, the three pneumatic ejector rods 12 are synchronously driven, and the inner ends of the pneumatic ejector rods are abutted against the corresponding side of the cover plate 2 to realize the positioning of the cover plate 2; the positioning hole positioning structure comprises a positioning pin 10 which is arranged right below the positioning hole 3 and can move upwards to penetrate through the supporting column 9 and a positioning cylinder 11 which is arranged on the lower side of the workbench 7 and is used for driving the positioning pin 10 to move upwards, the positioning pin 10 is vertically arranged, and when the positioning cylinder 11 extends, the upper end of the positioning pin 10 penetrates out of the positioning hole 3 in the cover plate 2 upwards; the cover plate supporting structure comprises a sliding plate 15 which is arranged behind the bottom plate 1 and can move forward and backward, a front jacking cylinder 16 which is arranged between the sliding plate 15 and the workbench 7 and is used for driving the sliding plate 15 to move forward and backward, a cover plate support which is arranged in front of the sliding plate 15 and is positioned above the bottom plate 1, and two cover plate positioning blocks 22 which are arranged on the sliding plate 15 and are positioned right behind the left side and the right side of the cover plate 2, wherein the cover plate support and the cover plate positioning blocks 22 are both positioned behind the cover plate 2, when the front jacking cylinder 16 extends, the cover plate support moves forward to the adjacent lower part of the lower side of the top of the cover plate 2, and the two cover plate positioning blocks 22 move forward and respectively abut against the rear ends of the left side and the right side of the cover plate 2; the cover plate compression structure comprises a vertical plate 17 vertically arranged at the rear part of the sliding plate 15, a lifting cylinder 19 vertically arranged at the front side of the vertical plate 17, a lifting plate 18 capable of moving up and down at the lower end of a telescopic rod of the lifting cylinder 19, a pressing block 21 at the bottom of the lifting plate 18 and a nut fixing part 20 capable of detaching and fixing the positioning nut 4 at the front side of the lifting plate 18, wherein a groove matched with the positioning nut 4 is formed in the nut fixing part 20 along the vertical direction, the groove is positioned right above the positioning hole 3, when the lifting cylinder 19 extends, the pressing block 21 downwards presses the upper side of the top of the cover plate 2, and the positioning nut 4 downwards presses the upper groove 6 and is sleeved on the upper end of the positioning pin 10.

Specifically, the supporting column 9 in the embodiment of the present invention is fixed on the worktable 7 and is a circular column coaxially disposed with the positioning pin 10; the number of the bottom plate supporting blocks 8 is three, and the three bottom plate supporting blocks 8 are respectively positioned on the front side of the bottom, the left side of the bottom and the right side of the bottom plate 1 and are all fixed on the workbench 7 along the vertical direction.

Specifically, the embodiment of the present invention provides a pneumatic ram 12 in the front of the cover plate 2 is arranged along the front-back direction, and the left pneumatic ram 12 is arranged along the left-right direction and located on the left side of the cover plate 2, and the pneumatic ram 12 on the right side is arranged along the left-right direction and located on the right side of the cover plate 2.

Further, a slide rail 14 is arranged on the workbench 7 and behind the bottom plate support structure in the front-back direction, and the slide plate 15 is slidably arranged on the slide rail 14; the front top cylinder 16 is positioned behind the sliding plate 15, the cylinder body of the front top cylinder is fixed on the workbench 7 along the front-back direction, and the front end of the telescopic rod of the front top cylinder is connected with the middle part of the rear side of the sliding plate 15.

Preferably, the bottom plate positioning blocks 25 in the embodiment of the present invention are rectangular blocks arranged in the front-back direction, and two limiting blocks 24 are arranged at the rear portions of the left and right sides of the sliding plate 15 and right behind the bottom plate positioning blocks 25 located at the corresponding sides; when the front top cylinder 16 is extended, the two stoppers 24 respectively abut against the rear sides of the two bottom plate positioning blocks 25.

Specifically, the embodiment of the present invention provides a lifting plate 18, which is horizontally disposed along the left and right sides and has two pressing blocks 21 disposed side by side on the left and right sides of the bottom thereof, wherein the two pressing blocks 21 are respectively disposed on the left and right sides of the upper groove 6.

The cover plate support in the embodiment of the present invention includes a groove support block 26 at the middle position of the front part of the slide plate 15 and two cover plate support blocks 23 at the left and right sides of the groove support block 26, the groove support block 26 is arranged in the front-back direction, and the front part of the groove support block 26 is provided with a U-shaped notch 27 matched with the positioning pin 10 in the front-back direction; when the front top cylinder 16 extends, the groove supporting block 26 moves forwards to the adjacent lower part of the upper groove 6, the two cover plate supporting blocks 23 move forwards to the adjacent lower part of the lower side of the top of the cover plate 2 and are respectively positioned right below the two pressing blocks 21, and the positioning pin 10 penetrates through the U-shaped notch 27 upwards.

Wherein, the groove in the embodiment of the utility model is a hexagonal hole matched with the positioning nut 4; the nut fixing member 20 is a magnetic member, and is disposed along the front-back direction, and the left and right sides thereof are provided with notches through which a corner of the left and right sides of the positioning nut 4 passes.

The embodiment of the utility model provides a beneficial effect that technical scheme brought is: the embodiment of the utility model provides an automatic welder of suspension box, this device can realize bottom plate, apron and set nut's location with automizing, can realize the equipment between bottom plate, apron and the set nut with automizing, can promote work efficiency.

Drawings

FIG. 1 is a schematic structural view of a prior art crash box;

FIG. 2 is a top view of a prior art crash box;

FIG. 3 is a schematic view of the structure of the base plate;

fig. 4 is a schematic structural diagram of an automatic welding device for a suspension box according to an embodiment of the present invention;

fig. 5 is a top view of an automatic welding device for a suspension box provided by an embodiment of the present invention;

fig. 6 is a side view of an automatic welding device for a suspension box according to an embodiment of the present invention;

fig. 7 is a rear view of an automatic welding device for a suspension box according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of the combination of the cover plate support structure and the base plate;

fig. 9 is a schematic view of the combination of the nut fixing member and the retaining nut.

In the figure: the device comprises a base plate 1, a cover plate 2, a positioning hole 3, a positioning nut 4, a lower groove 5, an upper groove 6, a workbench 7, a base plate supporting block 8, a supporting column 9, a positioning pin 10, a positioning cylinder 11, a pneumatic ejector rod 12, an ejector rod cylinder 13, a sliding rail 14, a sliding plate 15, a front ejector cylinder 16, a vertical plate 17, a lifting plate 18, a lifting cylinder 19, a nut fixing part 20, a pressing block 21, a cover plate positioning block 22, a cover plate supporting block 23, a limiting block 24, a base plate positioning block 25, a groove supporting block 26 and a U-shaped notch 27.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 4-9, the embodiment of the present invention provides an automatic welding device for a suspension box, which includes a welding robot (specifically located on the left side or the right side of the workbench 7) and the like on the welding tool and beside, wherein the welding robot is a conventional multi-axis welding robot. The welding tool comprises a workbench 7 (horizontally arranged) and a bottom plate supporting structure, a cover plate positioning structure, a positioning hole positioning structure, a cover plate supporting structure, a cover plate pressing structure and the like arranged on the workbench. The bottom plate supporting structure comprises a plurality of bottom plate supporting blocks 8 surrounding the supporting columns 9 and a plurality of bottom plate positioning blocks 25 surrounding the supporting columns 9 and arranged on the left side and the right side of the rear end of the bottom plate 1 (used for positioning the rear end of the bottom plate 1, and the bottom plate supporting blocks 9 can be matched with the bottom plate 1 to position), and the like, wherein the supporting columns 9 are matched with the lower grooves 5 in size. The soleplate 1 is horizontally arranged on the soleplate supporting block 8, the rear end of the soleplate 1 abuts against the front side of the soleplate positioning block 25, and the upper end of the supporting column 9 is positioned in the lower groove 5 and abuts against the lower groove 5. The cover plate positioning structure comprises three pneumatic ejector rods 12 which are respectively positioned in the front, the left side and the right side of the cover plate 2 and can move towards the cover plate 2, and the pneumatic ejector rods 12 (driven by an ejector rod cylinder 13 to act, the ejector rod cylinder 13 is fixed on the workbench 7 through a support, and the three ejector rod cylinders 13 are driven synchronously) are arranged horizontally and are positioned above the bottom plate 1. The three pneumatic push rods 12 are synchronously driven and the inner ends of the pneumatic push rods abut against the corresponding side of the cover plate 2 to position the cover plate 2 (the cover plate 2 can be positioned in four directions by matching with the cover plate positioning block 23). The positioning hole positioning structure comprises a positioning pin 10 which is arranged right below the positioning hole 3 and can move upwards to penetrate through the supporting column 9 (a hole for the positioning pin 10 to penetrate through is formed in the positioning pin), a positioning cylinder 11 (arranged vertically) which is arranged on the lower side of the workbench 7 and is used for driving the positioning pin 10 to move upwards, and the like; the positioning pin 10 is vertically arranged and is coaxial with the positioning hole 3, and the diameter of the positioning pin is slightly smaller than that of the positioning hole 3. When the positioning cylinder 11 extends, the upper end of the positioning pin 10 upwards penetrates through the positioning hole 3 on the cover plate 2 (simultaneously penetrates through the positioning hole 3 on the base plate 1) to position the base plate 1, the cover plate 2 and the positioning nut 4. The apron bearing structure includes that the slide 15 of bottom plate 1 rear and ability forward and backward motion (along controlling to the level setting), between slide 15 and the workstation 7 and be used for driving slide 15 seesaw's preceding top cylinder 16, slide 15 front portion just is located the apron of bottom plate 1 top and supports (be used for cooperating briquetting 21 to use, avoid apron 2 by the pressure deformation) and slide 15 go up and be located two apron locating pieces 22 (be used for fixing a position apron 2) of apron 2 left and right sides dead astern, etc., the apron supports and all is located the rear of apron 2 with apron locating piece 22. When the front top cylinder 16 extends, the cover plate support can be inserted forward into an opening at the rear side of the cover plate 2, the cover plate support moves forward to the adjacent lower part of the lower side of the top of the cover plate 2, and the two cover plate positioning blocks 22 move forward and respectively abut against the rear ends of the left side and the right side of the cover plate 2. Apron compact structure includes the riser 17 (along controlling to the setting) of slide 15 rear portion and vertical setting, the lift cylinder 19 of riser 17 front side upper portion and vertical setting, lift cylinder 19's telescopic link lower extreme and can the up-and-down motion lifter plate 18 (realize two kinds of actions simultaneously, compress tightly apron 2 and with positioning nut 4 compress tightly down in place), the briquetting 21 and the lifter plate 18 front side of lifter plate 18 bottom just can dismantle fixedly (positioning nut 4 is fixed after, nut mounting 20 moves upwards, nut mounting 20 can separate with positioning nut 4) positioning nut 4's nut mounting 20 etc. are equipped with along vertical direction on the nut mounting 20 with positioning nut 4 complex recess, the recess is located directly over locating hole 3. When the lifting cylinder 19 extends, the pressing block 21 presses downwards against the upper side of the top of the cover plate 2, and the positioning nut 4 (which is arranged in the groove and the bottom of which protrudes downwards to the nut fixing part 20) presses downwards against the upper groove 6 and is sleeved on the upper end of the positioning pin 10.

Specifically, referring to fig. 8, the supporting column 9 in the embodiment of the present invention is fixed on the table 7 and is a circular column disposed coaxially with the positioning pin 10. The number of the bottom plate supporting blocks 8 is three, and the three bottom plate supporting blocks 8 are respectively positioned on the front side of the bottom plate 1, the left side of the bottom plate 1 and the right side of the bottom plate 1 and are fixed on the workbench 7 along the vertical direction. More specifically, the three bottom plate supporting blocks 8 are distributed in an isosceles triangle shape and are rectangular blocks vertically arranged.

Specifically, referring to fig. 4 to 7, the pneumatic ram 12 in front (backward motion) in the embodiment of the present invention is disposed in front and back direction and located right in front of the cover plate 2, the pneumatic ram 12 in left side (rightward motion) is disposed in left and right direction and located in left side of the cover plate 2, and the pneumatic ram 12 in right side (leftward motion) is disposed in left and right direction and located in right side of the cover plate 2.

Further, referring to fig. 4-8, a sliding rail 14 (specifically, two rails arranged side by side in the left and right directions) is provided on the workbench 7 and behind the bottom plate supporting structure in the front-back direction, and the sliding plate 15 is slidably provided on the sliding rail 14. The front top cylinder 16 (between the two rails) is located behind the sliding plate 15, the cylinder body is fixed on the workbench 7 along the front-back direction, and the front end of the telescopic rod is connected with the middle part of the rear side of the sliding plate 15.

Preferably, referring to fig. 4-8, the bottom plate positioning block 25 in the embodiment of the present invention is a rectangular block disposed along the front-back direction, and two limiting blocks 24 (specifically rectangular blocks disposed along the left-right direction) are disposed at the rear portion of the left and right sides of the sliding plate 15 and right behind the bottom plate positioning block 25 located at the corresponding side. When the front top cylinder 16 extends, the two limit blocks 24 respectively abut against the rear sides of the two bottom plate locating blocks 25 to limit the stroke of the front top cylinder 16, that is, the bottom plate locating blocks 25 have two functions.

Specifically, referring to fig. 4 to 7, the lifting plate 18 of the embodiment of the present invention is horizontally disposed in the left-right direction and has two pressing blocks 21 disposed side by side at the left and right of the bottom thereof, and the two pressing blocks 21 are respectively disposed at the left and right sides of the upper groove 6. The pressing block 21 is a vertically arranged cylinder and is located right above the rear part of the upper side of the cover plate 2.

Referring to fig. 4-8, the cover plate in the embodiment of the present invention supports two cover plate supporting blocks 23 (for supporting the cover plate 2 and the pressing-down of the fitting nut fixing member 20) including the groove supporting block 26 at the front middle position of the sliding plate 15 and the left and right sides of the groove supporting block 26 (for supporting the cover plate 2 and the fitting pressing-down of the fitting pressing block 21), the groove supporting block 26 is arranged along the front-back direction, and the front portion of the groove supporting block 26 is provided with a U-shaped notch 27 fitted with the positioning pin 10 along the front-back direction (the width is slightly larger than the width of the positioning pin 10, and the rear portion of the groove supporting block is semicircular fitted with the positioning pin 10). When the front top cylinder 16 is extended, the groove support block 26 moves forward to the adjacent lower part of the upper groove 6, the two cover plate support blocks 23 move forward to the adjacent lower part of the lower side of the top of the cover plate 2 and are respectively positioned right below the two pressing blocks 21, and the positioning pin 10 passes through (the semicircular part of) the U-shaped notch 27 upwards. Specifically, the groove support block 26 is a vertically arranged rectangular block, and the cover plate support block 23 is a vertically arranged rectangular block and is higher than the groove support block 26.

Wherein, the embodiment of the utility model provides an in the recess be with positioning nut 4 complex hexagonal hole (positioning nut 4 just can imbed). The nut fixing member 20 is a magnetic member, and is disposed along the front-back direction, and the left and right sides thereof are provided with notches through which a corner of the left and right sides of the positioning nut 4 can penetrate, so that the positioning nut 4 can be conveniently mounted.

Wherein, the working process of this device does: the bottom plate 1 is placed manually, the positioning cylinder 11 is extended, the cover plate 2 and the positioning nut 4 are placed, the front ejection cylinder 16 is extended, the ejection rod cylinder 13 is extended, the lifting cylinder 19 is extended, and the welding robot acts.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims (8)

1. The automatic welding device of the suspension box comprises a welding tool and a welding robot beside the welding tool, and is characterized in that the welding tool comprises a workbench (7) and a bottom plate supporting structure, a cover plate positioning structure, a positioning hole positioning structure, a cover plate supporting structure and a cover plate pressing structure which are arranged on the workbench, wherein the bottom plate supporting structure comprises a supporting column (9) arranged on the lower side of a lower groove (5), a plurality of bottom plate supporting blocks (8) arranged on the lower side of a bottom plate (1) and surrounding the supporting column (9), and two bottom plate positioning blocks (25) arranged on the left side and the right side of the rear end of the bottom plate (1), the bottom plate (1) is horizontally arranged on the bottom plate supporting blocks (8), the rear end of the bottom plate supporting blocks abuts against the front side of the bottom plate positioning blocks (25), and the upper end of the supporting column (9) is positioned in the lower groove (5) and abuts against the lower groove (5); the cover plate positioning structure comprises three pneumatic push rods (12) which are respectively positioned in front of, on the left side of and on the right side of the cover plate (2) and can move towards the cover plate (2), the three pneumatic push rods (12) are synchronously driven, and the inner ends of the three pneumatic push rods are propped against the corresponding side of the cover plate (2) to realize the positioning of the cover plate (2); the positioning hole positioning structure comprises a positioning pin (10) which is arranged right below the positioning hole (3) and can move upwards to penetrate through the supporting column (9) and a positioning cylinder (11) which is arranged on the lower side of the workbench (7) and is used for driving the positioning pin (10) to move upwards, the positioning pin (10) is vertically arranged, and when the positioning cylinder (11) extends, the upper end of the positioning pin (10) upwards penetrates through the positioning hole (3) in the cover plate (2); the cover plate supporting structure comprises a sliding plate (15) which is arranged behind a bottom plate (1) and can move forwards and backwards, a front jacking cylinder (16) which is arranged between the sliding plate (15) and a workbench (7) and used for driving the sliding plate (15) to move forwards and backwards, two cover plate positioning blocks (22) which are arranged in front of the sliding plate (15), are arranged on the cover plate support and the sliding plate (15) above the bottom plate (1) and are arranged right behind the left side and the right side of the cover plate (2), the cover plate support and the cover plate positioning blocks (22) are both arranged behind the cover plate (2), when the front jacking cylinder (16) extends, the cover plate support moves forwards to the adjacent lower side of the top of the cover plate (2), and the two cover plate positioning blocks (22) move forwards and respectively abut against the rear ends of the left side and the right side of the cover plate (2); the cover plate pressing structure comprises a vertical plate (17) vertically arranged at the rear part of a sliding plate (15), a lifting cylinder (19) vertically arranged at the front side of the vertical plate (17), a lifting plate (18) capable of moving up and down at the lower end of a telescopic rod of the lifting cylinder (19), a pressing block (21) at the bottom of the lifting plate (18) and a nut fixing piece (20) capable of dismounting and fixing a positioning nut (4) at the front side of the lifting plate (18), wherein a groove matched with the positioning nut (4) is formed in the nut fixing piece (20) in the vertical direction, the groove is located right above the positioning hole (3), when the lifting cylinder (19) extends, the pressing block (21) downwards presses the upper side of the top of the cover plate (2), and the positioning nut (4) downwards presses the upper groove (6) and is sleeved at the upper end of the positioning pin (10).

2. The automatic welding device of suspension boxes according to claim 1, characterized by the fact that said supporting column (9) is fixed on the worktable (7) and it is a circular column arranged coaxially with the positioning pin (10); the number of the bottom plate supporting blocks (8) is three, and the three bottom plate supporting blocks (8) are respectively positioned on the front side of the bottom, the left side of the bottom and the right side of the bottom plate (1) and are fixed on the workbench (7) along the vertical direction.

3. The automatic welding device for the suspension box according to claim 1, characterized in that the front pneumatic ram (12) is arranged in the front-back direction and is located right in front of the cover plate (2), the left pneumatic ram (12) is arranged in the left-right direction and is located at the left side of the cover plate (2), and the right pneumatic ram (12) is arranged in the left-right direction and is located at the right side of the cover plate (2).

4. The automatic welding device for suspension boxes according to claim 1, characterized in that a sliding rail (14) is arranged on the workbench (7) and behind the bottom plate supporting structure along the front-back direction, and the sliding plate (15) is slidably arranged on the sliding rail (14); the front top cylinder (16) is positioned behind the sliding plate (15), the cylinder body of the front top cylinder is fixed on the workbench (7) along the front-back direction, and the front end of the telescopic rod of the front top cylinder is connected with the middle part of the rear side of the sliding plate (15).

5. The automatic welding device for the suspension box according to claim 1, wherein the bottom plate positioning block (25) is a rectangular block arranged in the front-back direction, and two limiting blocks (24) are arranged at the rear parts of the left side and the right side of the sliding plate (15) and right behind the bottom plate positioning block (25) at the corresponding side; when the front top cylinder (16) extends, the two limiting blocks (24) respectively lean against the rear sides of the two bottom plate positioning blocks (25).

6. The automatic welding device for the suspension box according to claim 1, characterized in that the lifting plate (18) is horizontally arranged along the left-right direction, and two pressing blocks (21) are arranged at the bottom of the lifting plate side by side, wherein the two pressing blocks (21) are respectively arranged at the left side and the right side of the upper groove (6).

7. The automatic welding device for the suspension box according to claim 6, wherein the cover plate support comprises a groove support block (26) at the middle position of the front part of the sliding plate (15) and two cover plate support blocks (23) at the left and right sides of the groove support block (26), the groove support block (26) is arranged along the front-back direction, and the front part of the groove support block is provided with a U-shaped notch (27) matched with the positioning pin (10) along the front-back direction; when the front jacking cylinder (16) extends, the groove supporting blocks (26) move forwards to the adjacent lower part of the upper groove (6), the two cover plate supporting blocks (23) move forwards to the adjacent lower part of the lower side of the top of the cover plate (2) and are respectively positioned under the two pressing blocks (21), and the positioning pin (10) upwards passes through the U-shaped notch (27).

8. The automatic welding device of the suspension box according to claim 1, characterized in that said groove is a hexagonal hole cooperating with a positioning nut (4); the nut fixing piece (20) is a magnetic body and is arranged along the front and back direction, and the left side and the right side of the nut fixing piece are provided with notches for the corners of the left side and the right side of the positioning nut (4) to penetrate out.

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