CN216177974U

CN216177974U - Rocker arm assembly welding clamp

Info

Publication number: CN216177974U
Application number: CN202122604827.1U
Authority: CN
Inventors: 刘嘉
Original assignee: Chongqing Junxiang Electromechanical Technology Co ltd
Current assignee: Chongqing Junxiang Electromechanical Technology Co ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2022-04-05
Anticipated expiration: 2031-10-28

Abstract

The utility model discloses a welding fixture for a rocker arm assembly, wherein a first cylinder on a workbench drives a first supporting plate connected with a shaft positioning block to extend to a setting position, a rocker arm connecting plate is arranged, an inner opening column and an outer opening column abut against the side surface of a rocker arm side plate, a pin rod penetrates through the outer opening column, the inner opening column and the shaft positioning block, a bent pressing block hinged with an output shaft of a second cylinder abuts against the rocker arm connecting plate, a dovetail pin block clamped with an output shaft of a third cylinder is matched with the front end of an inclined cylindrical sliding block to abut against the side surface of the rocker arm side plate, a positioning rod fixed by an output shaft of a rapid clamping cylinder penetrates through the rocker arm side plate and the inclined cylindrical sliding block, a rocker arm shaft rod is fixed, the rocker arm side plate and the rocker arm connecting plate are clamped and welded at multiple points through the limiting of front and back symmetrical holes, the rocker arm side plate and the rocker arm connecting plate with curved surfaces, and the left and right symmetrical structures of the rocker arm shaft rod are fixed and welded together, the positioning is accurate, the manual operation is less, and the working efficiency is improved.

Description

Rocker arm assembly welding clamp

Technical Field

The utility model relates to the technical field of automobile part manufacturing, in particular to a welding clamp for a rocker arm assembly.

Background

The part of rocking arm has the symmetry hole and the connecting plate of curb plate, and the rocking arm both ends are connected with the axostylus axostyle, need support the part from top to bottom to fix a position the curb plate of its rocking arm, weld again, there is not too good rocking arm assembly tack weld's anchor clamps at present.

Therefore, to solve the above problems, a welding jig for a rocker arm assembly with precise positioning is required.

Disclosure of Invention

To the deficiency of the prior art, the technical problem to be solved by the present patent application is: how to provide a rocker arm assembly welding jig with accurate positioning.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a welding fixture for a rocker arm assembly comprises a workbench, wherein a first air cylinder is arranged on the workbench, an output shaft of the first air cylinder is fixedly connected with a shaft positioning block, the shaft positioning block is connected with a first supporting plate, a rocker arm connecting plate is placed on the first supporting plate, the first supporting plate is connected with a first limiting block, inner open holes are connected to two ends of the shaft positioning block, the inner open holes are abutted to the side faces of rocker arm side plates, a shaft limiting seat is arranged on the workbench and connected with outer open holes, the outer open holes are abutted to the side faces of the rocker arm side plates, a pin rod is arranged on the shaft limiting seat and penetrates through the shaft limiting seat, the outer open holes, the inner open holes and the shaft positioning block, a second air cylinder is arranged below the workbench, an output shaft of the second air cylinder penetrates through the workbench and is hinged with a bent pressing block, the workbench is provided with a first mounting seat, the middle part of the bent press block is hinged with the first mounting seat, the bent press block is abutted on the rocker arm connecting plate, the workbench is provided with a second supporting plate, the second supporting plate is connected with a limiting nail and a second limiting block, the limiting nail is abutted with the second limiting block and the rocker arm connecting plate, the workbench is provided with a third supporting plate, the third supporting plate is positioned below the rocker arm side plate, the workbench is provided with a third air cylinder, the output shaft of the third air cylinder is connected with a dovetail pin block in a clamping manner, the workbench is provided with a slide table seat, the slide table is provided with a dovetail groove, the slide table is matched with the dovetail groove and is provided with an inclined cylindrical slide block, the front end of the inclined cylindrical slide block is abutted against the side surface of the rocker arm side plate, and the dovetail pin block penetrates through the slide table seat and is abutted against the slide block, the rapid clamping device is characterized in that a rapid clamping mounting seat is arranged on the workbench, a rapid clamping cylinder is fixedly connected onto the rapid clamping mounting seat, a positioning rod is fixedly connected to an output shaft of the rapid clamping cylinder, a cylindrical abutting block is sleeved outside the positioning rod, the cylindrical abutting block abuts against the side face of the rocker arm side plate, the positioning rod penetrates through the rocker arm side plate and the inclined cylindrical sliding block, a fourth cylinder is arranged on the workbench, an output shaft of the fourth cylinder is hinged to a shaft fixing plate, a twisting seat is fixed on a cylinder body of the fourth cylinder, the middle of the shaft fixing plate is hinged to the twisting seat, and the shaft fixing plate abuts against a shaft rod of the rocker arm.

Thus, driven by the output shaft of the first cylinder, the shaft positioning block extends to the middle of the front symmetrical hole of the rocker arm side plate to position the front symmetrical hole of the rocker arm side plate, the internally-opened hole columns connected with the two ends of the shaft positioning block are aligned with the front symmetrical hole of the rocker arm side plate, one internally-opened hole column is abutted against the inner side of one side of the rocker arm side plate, and then is aligned with the outer side of the front symmetrical hole of the rocker arm side plate through the externally-opened hole column on the shaft limiting seat for positioning, and the pin rod is introduced into the shaft limiting seat to penetrate through the shaft limiting seat, the externally-opened hole column, the internally-opened hole column and the shaft positioning block, so that the front symmetrical hole of the rocker arm side plate is positioned, and the two rocker arm side plates reach the corresponding positions; the first supporting plate connected with the shaft positioning block supports the rocker arm connecting plate on the upper side, the first limiting block of the first supporting plate limits the rocker arm connecting plate on the upper side, the rocker arm connecting plate corresponds to the front and back positions of the rocker arm side plate and is limited, then the bent pressing block on the output shaft of the second air cylinder rotates on the first mounting seat, the rocker arm connecting plate is pressed, the vertical positioning is carried out, the operation is convenient and rapid, the bent pressing block is rotated immediately after welding is finished, the rapid operation is realized, and the production efficiency is improved; the workbench is fixedly connected with a second supporting plate through a bolt, the second supporting plate is positioned below the lower rocker arm connecting plate to support the rocker arm connecting plate, the lower rocker arm connecting plate is positioned forwards and backwards through a limiting nail and a second limiting block arranged on the second supporting plate to be fixed, the rocker arm connecting plate is clamped in the middle through a curved surface structure of the rocker arm side plate, welding is carried out, and positioning is accurate; the lower end of the rear part of the rocker arm side plate is conveniently placed by the third supporting plate when the rocker arm side plate is not welded, and the downward position of the rocker arm side plate is limited; the output shaft of the third cylinder is provided with a cylindrical block which is clamped in a sliding groove at the tail part of the dovetail pin block, so that the dovetail pin block can be conveniently slid out of the cylindrical block through the sliding groove while the output shaft of the third cylinder can drive the dovetail pin block to stretch and retract, and the disassembly is convenient; in the dovetail groove of the sliding table, the rear end of an inclined cylindrical sliding block is matched to slide in the dovetail groove, so that the inclined cylindrical sliding block has a certain motion range in the middle of a rear symmetrical hole of a rocker arm side plate, a dovetail pin block is matched to slide out in the center of the sliding table, a dovetail sliding block bulge of the dovetail pin block is matched and is inserted into an inclined dovetail groove in the middle of two inclined cylindrical sliding blocks, the two inclined cylindrical sliding blocks are spread along with the deeper insertion distance of the dovetail pin block and are abutted against the inner side of the rear symmetrical hole of the rocker arm side plate to position the rear symmetrical hole of the rocker arm side plate, then a rapid clamping cylinder is arranged, the pressure of the cylinder can be controlled, the position of a manual control clamp of the rapid clamp is controlled, the outer side of the rocker arm side plate is abutted and supported through a cylindrical abutting block on a positioning rod, the positioning rod extends into the inclined cylindrical sliding block, so as to position the rear symmetrical hole of the rocker arm side plate, the positioning is connected through a rocker arm shaft lever, the rocking arm that two symmetries set up, constitute the rocking arm assembly, the epaxial axle fixed plate of output of fourth cylinder, articulate on the hank seat through axle fixed plate middle-end, the output shaft that can go up and down the fourth cylinder will, the axle fixed plate rotates to be fixed on the rocking arm axostylus axostyle, through spacing to front and back symmetric hole, the multiple spot of rocking arm curb plate and rocking arm connecting plate position is spacing, the welding is cliied with the rocking arm curb plate and the rocking arm connecting plate that will have the curved surface, and weld together with the structure fixing of rocking arm axostylus axostyle bilateral symmetry, realize the location accuracy, manual operation is few, and the work efficiency is improved.

Further, the shaft positioning block 3 is connected with the fixed sliding table in a sliding manner. The fixed sliding table support shaft positioning block 3 slides more stably.

Furthermore, a fourth supporting plate is arranged on the workbench and is positioned close to one side of the first mounting seat. The middle end position of the fourth supporting plate supporting the rocker arm side plate is more stable.

Furthermore, be provided with the fifth backup pad on the workstation, install quick elbow in the fifth backup pad and press from both sides. The fifth supporting plate supports the middle part of the rocker arm side plate on the other side, and the rapid elbow clamp can be used for fixing the relative position of the rocker arm side plate through the elbow clamp, so that the use is more convenient.

Further, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are all connected with an air pump. The movement of the apparatus is controlled by air pressure, so that automation is realized.

To sum up, this rocking arm assembly welding jig has the accurate advantage in location.

Drawings

FIG. 1 is a schematic structural view of a welding fixture for a rocker arm assembly according to the present invention.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is an enlarged schematic view of a structure at B in fig. 1.

Fig. 4 is an enlarged schematic view of the structure at C in fig. 1.

Fig. 5 is a bottom schematic view of the workbench of fig. 1.

FIG. 6 is a schematic structural view of the rocker arm assembly.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "upper, lower" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

As shown in fig. 1-5, a welding fixture for rocker arm assemblies comprises a workbench 1, wherein a first cylinder 2 is arranged on the workbench 1, an output shaft of the first cylinder 2 is fixedly connected with a shaft positioning block 3, the shaft positioning block 3 is connected with a first supporting plate 4, a rocker arm connecting plate 5 is placed on the first supporting plate 4, the first supporting plate 4 is connected with a first limiting block 6, inner open-hole columns 7 are connected with two ends of the shaft positioning block 3, the inner open-hole columns 7 are abutted against the side surfaces of rocker arm side plates 8, a shaft limiting seat 9 is arranged on the workbench 1, the shaft limiting seat 9 is connected with an outer open-hole column 10, the outer open-hole column 10 is abutted against the side surfaces of the rocker arm side plates 8, a pin rod 11 is arranged on the shaft limiting seat 9, the outer open-hole column 10, the inner open-hole columns 7 and the shaft positioning block 3 are penetrated by the pin rod 11, a second air cylinder 12 is arranged below the workbench 1, an output shaft of the second air cylinder 12 penetrates through the workbench 1 and is hinged with a bent press block 13, the workbench 1 is provided with a first mounting seat 14, the middle part of the bent press block 13 is hinged with the first mounting seat 14, the bent press block 13 is abutted on the rocker arm connecting plate 5, a second supporting plate 15 is arranged on the workbench 1, the second supporting plate 15 is connected with a limit nail 16 and a second limit block 17, the limit nail 16 is abutted with the second limit block 17 and the rocker arm connecting plate 5, the workbench 1 is provided with a third supporting plate 18, the third supporting plate 18 is positioned below the rocker arm side plate 8, a third air cylinder 19 is arranged on the workbench 1, a dovetail pin block 20 is connected with an output shaft of the third air cylinder 19 in a clamping manner, a slide pedestal 21 is arranged on the workbench 1, and the slide pedestal is provided with a dovetail groove, the sliding table is provided with an inclined cylindrical sliding block 22 in cooperation with the dovetail groove, the front end of the inclined cylindrical sliding block 22 is abutted against the side face of the rocker arm side plate 8, the dovetail pin block 20 penetrates through the sliding table seat 21 and is abutted against the inclined cylindrical sliding block 22, the workbench 1 is provided with a quick clamp mounting seat 23, the quick clamp mounting seat 23 is fixedly connected with a quick clamping cylinder 24, an output shaft of the quick clamping cylinder 24 is fixedly connected with a positioning rod 25, the positioning rod 25 is externally sleeved with a cylindrical abutting block 26, the cylindrical abutting block 26 is abutted against the side face of the rocker arm side plate 8, the positioning rod 25 penetrates through the rocker arm side plate 8 and the inclined cylindrical sliding block 22, the workbench 1 is provided with a fourth cylinder 27, an output shaft of the fourth cylinder 27 is hinged with a shaft fixing plate 28, a twisting seat 29 is fixed on the cylinder body of the fourth cylinder 27, and the middle part of the shaft fixing plate 28 is hinged with the twisting seat 29, the shaft fixing plate 28 abuts against the rocker shaft 30.

Thus, driven by the output shaft of the first cylinder 2, the shaft positioning block 3 extends to the middle of the front symmetrical hole of the rocker arm side plate 8 to position the front symmetrical hole of the rocker arm side plate 8, the inner open hole columns 7 connected with the two ends of the shaft positioning block 3 are aligned with the front symmetrical hole of the rocker arm side plate 8, one of the inner open hole columns 7 is abutted against the inner side of one side of the rocker arm side plate 8 and is aligned with the outer side of the front symmetrical hole of the rocker arm side plate 8 through the outer open hole column 10 on the shaft limiting seat 9 to position, and the pin rod 11 is introduced into the shaft limiting seat 9 to penetrate through the shaft limiting seat 9, the outer open hole column 10, the inner open hole column 7 and the shaft positioning block 3, so that the front symmetrical hole of the rocker arm side plate 8 is positioned, and the two rocker arm side plates 8 reach the corresponding positions; the rocker arm connecting plate 5 on the shaft positioning block 3 is supported by the first supporting plate 4 connected with the shaft positioning block 3, the rocker arm connecting plate 5 on the shaft positioning block is limited by the first limiting block 6 of the first supporting plate 4, so that the rocker arm connecting plate 5 corresponds to the front and back positions of the rocker arm side plate 8 and is limited, the rocker arm connecting plate 5 is pressed by the bent pressing block 13 on the output shaft of the second air cylinder 12 and rotates on the first mounting seat 14 to be positioned up and down, convenience and rapidness are realized, and after welding is finished, the bent pressing block 13 is immediately rotated, so that the rapid operation is realized, and the production efficiency is improved; the workbench 1 is fixedly connected with a second supporting plate 15 through a bolt, the second supporting plate 15 is positioned below the lower rocker arm connecting plate 5 to support the rocker arm connecting plate 5, the lower rocker arm connecting plate 5 is positioned forwards and backwards through a limiting nail 16 and a second limiting block 17 arranged on the second supporting plate 15 to be fixed, the rocker arm connecting plate 5 is clamped in the middle through a curved surface structure of the rocker arm side plate 8, welding is carried out, and positioning is accurate; the third supporting plate 18 is used for conveniently placing the rocker arm side plate 8 at the lower end of the rear part of the rocker arm side plate 8 when the rocker arm side plate 8 is not welded, and limiting the downward position of the rocker arm side plate 8; a cylindrical block is arranged on an output shaft of the third cylinder 19, and the cylindrical block is clamped in a sliding groove at the tail part of the dovetail pin block 20, so that the dovetail pin block 20 can be conveniently slid out of the cylindrical block through the sliding groove while the output shaft of the third cylinder 19 can drive the dovetail pin block 20 to stretch and retract, and the disassembly is convenient; in the dovetail groove of the sliding table, the rear end of an inclined cylindrical sliding block 22 is matched to slide in the dovetail groove, so that the inclined cylindrical sliding block 22 has a certain motion range in the middle of a rear symmetrical hole of a rocker arm side plate 8, a dovetail pin block 20 is matched to slide out in the center of the sliding table, a dovetail block bulge of the dovetail pin block 20 is matched to be inserted into an inclined dovetail groove in the middle of two inclined cylindrical sliding blocks 22, the two inclined cylindrical sliding blocks 22 are spread along with the deeper inserting distance of the dovetail pin block 20 and are abutted against the inner side of the rear symmetrical hole of the rocker arm side plate 8 to position the rear symmetrical hole of the rocker arm side plate 8, then a rapid clamping cylinder 24 is arranged, the pressure of a clamp can be controlled by the cylinder, the position of a manual control clamp of the rapid clamp is controlled, the outer side of the rocker arm side plate 8 is abutted and supported by a cylindrical abutting block 26 on a positioning rod 25, the positioning rod 25 is extended into the rocker arm side plate 8 to the inclined cylindrical sliding block 22, so as to position the rear symmetrical hole of the rocker arm side plate 8, connect through rocker arm axostylus axostyle 30, the rocking arm that two symmetries set up, constitute the rocker arm assembly, the epaxial axle fixed plate 28 of fourth cylinder 27's output, articulate on hank seat 29 through axle fixed plate 28 middle-end, the output shaft that can go up and down fourth cylinder 27 will, axle fixed plate 28 rotates and fixes on rocker arm axostylus axostyle 30, through spacing to the front and back symmetry hole, the multiple spot of rocker arm curb plate 8 and rocker arm connecting plate 5 position is spacing, the welding is cliied to rocker arm curb plate 8 and the rocker arm connecting plate 5 that will have the curved surface, and weld together with the fixed structure of rocker arm axostylus axostyle 30 bilateral symmetry, realize the location accuracy, manual operation is few, and work efficiency is improved.

In this embodiment, the shaft positioning block 3 is slidably connected to the fixed sliding table. The fixed sliding table support shaft positioning block 3 slides more stably.

In this embodiment, the workbench 1 is provided with a fourth supporting plate 32, and the fourth supporting plate 32 is located at a side close to the first mounting seat 14. The position of the middle end of the rocker arm side plate 8 supported by the fourth support plate 32 is more stable.

In this embodiment, the workbench 1 is provided with a fifth support plate 33, and the fifth support plate 33 is provided with a rapid elbow clamp 34. The fifth supporting plate 33 supports the middle part of the rocker arm side plate 8 on the other side, and the rapid elbow clamp 34 can be used for fixing the relative position of the rocker arm side plate 8, so that the use is more convenient.

In this embodiment, the first cylinder 2, the second cylinder 12, the third cylinder 19 and the fourth cylinder 27 are all connected to an air pump. The movement of the apparatus is controlled by air pressure, so that automation is realized.

The principle is as follows: driven by an output shaft of the first air cylinder, a shaft positioning block extends to the middle of a front symmetrical hole of the rocker arm side plate to position the front symmetrical hole of the rocker arm side plate, an inner open hole column connected with two ends of the shaft positioning block is aligned with the front symmetrical hole of the rocker arm side plate, one inner open hole column is abutted against the inner side of one side of the rocker arm side plate, and then the outer open hole column on the shaft limiting seat is aligned with the outer side of the front symmetrical hole of the rocker arm side plate to position, a pin rod is introduced into the shaft limiting seat to penetrate through the shaft limiting seat, the outer open hole column, the inner open hole column and the shaft positioning block, so that the front symmetrical hole of the rocker arm side plate is positioned, and the two rocker arm side plates reach corresponding positions; the first supporting plate connected with the shaft positioning block supports the rocker arm connecting plate on the upper side, the first limiting block of the first supporting plate limits the rocker arm connecting plate on the upper side, the rocker arm connecting plate corresponds to the front and back positions of the rocker arm side plate and is limited, then the bent pressing block on the output shaft of the second air cylinder rotates on the first mounting seat, the rocker arm connecting plate is pressed, the vertical positioning is carried out, the operation is convenient and rapid, the bent pressing block is rotated immediately after welding is finished, the rapid operation is realized, and the production efficiency is improved; the workbench is fixedly connected with a second supporting plate through a bolt, the second supporting plate is positioned below the lower rocker arm connecting plate to support the rocker arm connecting plate, the lower rocker arm connecting plate is positioned forwards and backwards through a limiting nail and a second limiting block arranged on the second supporting plate to be fixed, the rocker arm connecting plate is clamped in the middle through a curved surface structure of the rocker arm side plate, welding is carried out, and positioning is accurate; the lower end of the rear part of the rocker arm side plate is conveniently placed by the third supporting plate when the rocker arm side plate is not welded, and the downward position of the rocker arm side plate is limited; the output shaft of the third cylinder is provided with a cylindrical block which is clamped in a sliding groove at the tail part of the dovetail pin block, so that the dovetail pin block can be conveniently slid out of the cylindrical block through the sliding groove while the output shaft of the third cylinder can drive the dovetail pin block to stretch and retract, and the disassembly is convenient; in the dovetail groove of the sliding table, the rear end of an inclined cylindrical sliding block is matched to slide in the dovetail groove, so that the inclined cylindrical sliding block has a certain motion range in the middle of a rear symmetrical hole of a rocker arm side plate, a dovetail pin block is matched to slide out in the center of the sliding table, a dovetail sliding block bulge of the dovetail pin block is matched and is inserted into an inclined dovetail groove in the middle of two inclined cylindrical sliding blocks, the two inclined cylindrical sliding blocks are spread along with the deeper insertion distance of the dovetail pin block and are abutted against the inner side of the rear symmetrical hole of the rocker arm side plate to position the rear symmetrical hole of the rocker arm side plate, then a rapid clamping cylinder is arranged, the pressure of the cylinder can be controlled, the position of a manual control clamp of the rapid clamp is controlled, the outer side of the rocker arm side plate is abutted and supported through a cylindrical abutting block on a positioning rod, the positioning rod extends into the inclined cylindrical sliding block, so as to position the rear symmetrical hole of the rocker arm side plate, the positioning is connected through a rocker arm shaft lever, the rocking arm that two symmetries set up, constitute the rocking arm assembly, the epaxial axle fixed plate of output of fourth cylinder, articulate on the hank seat through axle fixed plate middle-end, the output shaft that can go up and down the fourth cylinder will, the axle fixed plate rotates to be fixed on the rocking arm axostylus axostyle, through spacing to front and back symmetric hole, the multiple spot of rocking arm curb plate and rocking arm connecting plate position is spacing, the welding is cliied with the rocking arm curb plate and the rocking arm connecting plate that will have the curved surface, and weld together with the structure fixing of rocking arm axostylus axostyle bilateral symmetry, realize the location accuracy, manual operation is few, and the work efficiency is improved.

Finally, it should be noted that: various modifications and alterations of this invention may be made by those skilled in the art without departing from the spirit and scope of this invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. The welding fixture for the rocker arm assembly is characterized by comprising a workbench (1), wherein a first cylinder (2) is arranged on the workbench (1), an output shaft of the first cylinder (2) is fixedly connected with a shaft positioning block (3), the shaft positioning block (3) is connected with a first supporting plate (4), a rocker arm connecting plate (5) is placed on the first supporting plate (4), the first supporting plate (4) is connected with a first limiting block (6), two ends of the shaft positioning block (3) are connected with inner open-hole columns (7), the inner open-hole columns (7) are abutted to the side faces of rocker arm side plates (8), a shaft limiting seat (9) is arranged on the workbench (1), the shaft limiting seat (9) is connected with an outer open-hole column (10), the outer open-hole column (10) is abutted to the side faces of the rocker arm side plates (8), and a pin rod (11) is arranged on the shaft limiting seat (9), the pin rod (11) penetrates through the shaft limiting seat (9), the outer open hole column (10), the inner open hole column (7) and the shaft positioning block (3), a second cylinder (12) is arranged below the workbench (1), an output shaft of the second cylinder (12) penetrates through the workbench (1) and is hinged with a bent pressing block (13), the workbench (1) is provided with a first mounting seat (14), the middle part of the bent pressing block (13) is hinged with the first mounting seat (14), the bent pressing block (13) is abutted against the rocker arm connecting plate (5), a second supporting plate (15) is arranged on the workbench (1), the second supporting plate (15) is connected with a limiting nail (16) and a second limiting block (17), the limiting nail (16) is abutted against the second limiting block (17) and the rocker arm connecting plate (5), the workbench (1) is provided with a third supporting plate (18), the third supporting plate (18) is located below the rocker arm side plate (8), a third air cylinder (19) is arranged on the workbench (1), a dovetail pin block (20) is connected to an output shaft of the third air cylinder (19), a sliding table seat (21) is arranged on the workbench (1), a dovetail groove is arranged on the sliding table, the sliding table is matched with the dovetail groove and provided with an inclined cylindrical sliding block (22), the front end of the inclined cylindrical sliding block (22) is abutted to the side face of the rocker arm side plate (8), the dovetail pin block (20) penetrates through the sliding table seat (21) and is abutted to the inclined cylindrical sliding block (22), a quick clamp mounting seat (23) is arranged on the workbench (1), a quick clamping air cylinder (24) is fixedly connected to the quick clamp mounting seat (23), and a positioning rod (25) is fixedly connected to an output shaft of the quick clamping air cylinder (24), the positioning rod (25) is sleeved with a cylindrical abutting block (26), the cylindrical abutting block (26) is abutted to the side face of the rocker arm side plate (8), the positioning rod (25) penetrates through the rocker arm side plate (8) and the inclined cylindrical sliding block (22), a fourth air cylinder (27) is arranged on the workbench (1), an output shaft of the fourth air cylinder (27) is hinged to a shaft fixing plate (28), a twisting seat (29) is fixed on a cylinder body of the fourth air cylinder (27), the middle of the shaft fixing plate (28) is hinged to the twisting seat (29), and the shaft fixing plate (28) is abutted to the rocker arm shaft lever (30).

2. The welding fixture for the rocker arm assembly according to claim 1, wherein the shaft positioning block (3) is slidably connected with the fixed sliding table.

3. The welding fixture for the rocker arm assembly according to claim 1, characterized in that a fourth support plate (32) is arranged on the working platform (1), and the fourth support plate (32) is located on the side close to the first mounting seat (14).

4. The welding fixture for the rocker arm assembly according to claim 1, characterized in that a fifth support plate (33) is arranged on the working platform (1), and a quick elbow clamp (34) is mounted on the fifth support plate (33).

5. The welding fixture for the rocker arm assembly according to claim 1, wherein the first cylinder (2), the second cylinder (12), the third cylinder (19) and the fourth cylinder (27) are all connected with an air pump.