CN111545976A

CN111545976A - Welding tool for rear lower pull rod of automobile

Info

Publication number: CN111545976A
Application number: CN202010524079.3A
Authority: CN
Inventors: 丁日红
Original assignee: Lishui City Liandu District Yirong Kaisheng Mould Factory
Current assignee: Lishui City Liandu District Yirong Kaisheng Mould Factory
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-08-18

Abstract

The invention relates to the field of automobile parts, in particular to a welding tool for an automobile rear lower pull rod, which comprises a welding table, a clamping mechanism, a pushing mechanism and a locking mechanism, wherein the clamping mechanism is arranged on the welding table and used for fixing a pull rod main body, the pushing mechanism is used for pushing two column sleeves to two ends of the pull rod main body respectively, the locking mechanism is used for locking the current state of the pushing mechanism, the clamping mechanism comprises a positioning mechanism used for positioning the pull rod main body and a rotating lower pressing mechanism used for pressing the pull rod main body, the pushing mechanism comprises a push-pull rod and two feeding mechanisms used for pushing the column sleeves, each feeding mechanism comprises a fixed supporting seat and a carrier used for connecting the column sleeves, two carriers are respectively connected to two ends of the push-pull rod, two groups of locking mechanisms are arranged, the welding tool is simple in structure and convenient to operate, the position fixing of the rear lower pull rod during welding can, High work load has made things convenient for the welding to the lower link junction behind the automobile body reinforcement.

Description

Welding tool for rear lower pull rod of automobile

Technical Field

The invention relates to the field of automobile parts, in particular to a welding tool for an automobile rear lower pull rod.

Background

The automobile modification means that the original automobile produced by an automobile manufacturer is subjected to external modeling, internal modeling and mechanical property modification according to the requirements of an automobile owner, and mainly comprises automobile body modification and power modification. Wherein to the repacking of automobile body including suspension system, braking system and automobile body reinforcement etc. aspect, in the automobile body reinforcement, divide into top bar (commonly known as the balancing pole) again, well lower shaft frame and be used for consolidating the back lower link etc. of chassis, then the lower link is in process of production, it is more to need welded part, must guarantee that each part cooperation can not take place the skew in the welded, the required precision is than higher, will guarantee the high strength after the welding, consequently it is necessary to design a welding frock that is used for lower link behind the car.

Disclosure of Invention

The invention aims to provide a welding tool for a rear lower pull rod of an automobile, which is convenient for the rear lower pull rod to be quickly assembled and welded, so that the welding efficiency of the welded lower pull rod is improved.

In order to achieve the purpose, the invention adopts the following technical scheme: provides a welding tool for a rear lower pull rod of an automobile, which comprises a welding table and a clamping mechanism arranged on the welding table and used for fixing a pull rod main body, the push mechanism is used for pushing the two column sleeves to the two ends of the pull rod main body respectively and the locking mechanism used for locking the current state of the push mechanism, the clamping mechanism comprises a positioning mechanism used for positioning the pull rod main body and a rotary pressing mechanism used for pressing the pull rod main body, the clamping mechanism is located in the middle of the top end of the welding table, the push mechanism comprises a push-pull rod and two feeding mechanisms used for pushing the column sleeves, the two feeding mechanisms are fixedly arranged at the tops of the two ends of the welding table, each feeding mechanism comprises a fixed supporting seat and a carrier used for connecting the column sleeves, the carriers are movably arranged on the corresponding fixed supporting seats, the two carriers are connected to the two ends of the push-pull rod respectively, and the locking mechanisms are two groups and are arranged on the two fixed supporting seats.

As a preferred scheme of a welding tool for a rear lower pull rod of an automobile, a positioning mechanism comprises a bottom plate, a rotating motor, a gear, two racks and two strip-shaped positioning plates, supporting legs are symmetrically and fixedly arranged at the bottoms of the two ends of the bottom plate, the bottom plate is horizontally arranged at the center of the top of a welding table, the two strip-shaped positioning plates are horizontally arranged and are attached to the top of the bottom plate, the two strip-shaped positioning plates are parallel to each other, the two racks are attached to the bottom of the bottom plate, the two racks are respectively and fixedly connected with the two strip-shaped positioning plates, the two racks are parallel to each other and are perpendicular to the strip-shaped positioning plates, the rotating motor is vertically and fixedly arranged at the bottom of a table top of the welding table, an output shaft of the rotating motor upwards penetrates through the welding table and is fixedly connected, the bottom plate is symmetrically provided with two strip-shaped avoiding grooves for avoiding the two strip-shaped positioning plates moving in opposite directions, and the bottom plate is fixedly provided with baffle plates for preventing the strip-shaped positioning plates from sliding out of the strip-shaped avoiding grooves along the two sides of the bottom plate in the length direction.

As an optimal scheme for welding frock of lower link behind car, rotatory pushing mechanism includes revolving cylinder, the unipolar cylinder, the supporting roof, connecting rod and clamp plate, revolving cylinder is fixed to be set up at the top of welding bench and is located the one side that feeding mechanism was kept away from to the supporting seat, the unipolar cylinder is the fixed top output that sets up at revolving cylinder of vertical state, the vertical upwards extension of output of unipolar cylinder, the output fixed connection of supporting roof and unipolar cylinder, the free end and the connecting rod of supporting the roof are connected, the connecting rod links to each other with the center department of clamp plate, the clamp plate is the horizontality and sets up directly over the bottom plate, the bottom of clamp plate is provided with and is used for compressing tightly the layer with the shape assorted rubber of pull rod main part.

As an optimal scheme of a welding tool for a rear lower pull rod of an automobile, each fixed supporting seat is arranged in a horizontal state, the bottom of each fixed supporting seat is fixedly arranged on a welding table through a stand column, a strip-shaped sliding groove is formed in each fixed supporting seat, the length direction of each strip-shaped sliding groove is consistent with that of an inclined rod structure at the end of a pull rod main body, a carrier is arranged in a vertical state, the upper end of the carrier upwards penetrates through the strip-shaped sliding groove and is in sliding connection with a push-pull rod, and the lower end of the carrier is provided with an elastic rubber head used.

As a preferred scheme of a welding tool for a rear lower pull rod of an automobile, one side, close to a clamping mechanism, of a push-pull rod is provided with a T-shaped sliding groove consistent with the length direction of the push-pull rod, two sliding blocks matched with the T-shaped sliding groove are symmetrically arranged on the push-pull rod, the top of a carrier is fixedly connected with the sliding blocks, and cover plates are fixedly arranged at two ends of the T-shaped sliding groove.

As an optimal scheme of a welding tool for a rear lower pull rod of an automobile, a locking mechanism comprises a spring bolt mechanism, a fixed latch mechanism and a supporting side plate, the fixed latch mechanism is matched with the spring bolt mechanism, the supporting side plate is vertically and fixedly arranged on one side, away from the push-pull rod, of the top of a fixed supporting seat, the fixed latch mechanism is horizontally arranged on one side, close to the push-pull rod, of the supporting side plate, and the spring bolt mechanism is fixedly arranged on the top of one end of the push-pull rod and is in clamping fit with the fixed.

As an optimal scheme of a welding frock for lower link behind car, fixed latch mechanism includes rack bar and rectangular plate, and the rack bar is the horizontality and sets up on the lateral wall that supports the curb plate, and the rectangular plate is the level and fixed laminating sets up in the bottom of rack bar, and the both ends of rack bar are all fixed and are provided with limit baffle.

As an optimal selection scheme for a welding frock for lower link behind car, spring bolt mechanism includes the cylindric lock, spring and L type angle seat, L type angle seat is fixed to be set up in the top of push-and-pull rod, the cylindric lock is the horizontality and sets up in first half of L type angle seat, the perforation that is used for supplying the cylindric lock to pass through is offered to first half of L type angle seat, fenestrate inboard symmetry is provided with two spacing, two spacing grooves that are used for supplying spacing sliding connection are offered to the symmetry on the outer wall of cylindric lock, an annular flange is established to the fixed cover in middle part of calorie post, the spring housing is established in the cylindric lock outside, annular flange and L type angle seat are contradicted respectively at the both ends of spring, the fixed cover of one end that the support curb plate was kept away from to the cylindric lock is equipped with the anticreep ring, the one end.

The invention has the beneficial effects that: this welding frock is put into fixture with back lower link when using then control positioning mechanism and rotatory pushing down mechanism respectively and press from both sides tight location and top to the back lower link and compress tightly, send the post sleeve to the both ends welding department of back lower link through feeding mechanism and weld, locking mechanical system locks feeding mechanism current state in the propelling movement post sleeve, keep the post sleeve in close contact with the both ends welding department of back lower link to weld, this welding frock simple structure, convenient operation, rigidity when welding to back lower link can not take place the skew, play high efficiency then, high work load, the welding of lower link junction behind the automobile body reinforcement has been made things convenient for.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a schematic structural view of a rear down-link according to the present invention.

Fig. 2 is a schematic perspective view of the present invention.

Fig. 3 is a perspective view of the rotary hold-down mechanism.

Fig. 4 is a perspective view of the positioning mechanism.

Fig. 5 is a schematic perspective view of the pushing mechanism and the locking mechanism.

Fig. 6 is a schematic perspective view of the feeding mechanism and the locking mechanism.

Fig. 7 is a schematic perspective view of the feeding mechanism and the locking mechanism.

Fig. 8 is a partial perspective view of the feeding mechanism.

In the figure:

1. a pull rod body; 2. a column sleeve; 3. a clamping mechanism; 4. a pushing mechanism; 5. a locking mechanism; 6. a positioning mechanism; 7. rotating the pressing mechanism; 8. a push-pull rod; 9. a feeding mechanism; 10. fixing the supporting seat; 11. a carrier; 12. a base plate; 13. a rotating electric machine; 14. a gear; 15. a rack; 16. a strip-shaped positioning plate; 17. supporting legs; 18. a strip-shaped avoidance slot; 19. a rotating cylinder; 20. a single-shaft cylinder; 21. supporting a top plate; 22. a connecting rod; 23. pressing a plate; 24. a rubber compression layer; 25. a strip-shaped chute; 26. an elastic rubber head; 27. a bevel structure; 28. a T-shaped chute; 29. a slider; 30. a cover plate; 31. a latch bolt mechanism; 32. an anti-drop ring; 33. fixing the latch mechanism; 34. supporting the side plates; 35. a rack clamping bar; 36. a rectangular plate; 37. a limit baffle; 38. a cylindrical pin; 39. a spring; 40. an L-shaped corner seat; 41. perforating; 42. a limiting strip; 43. a limiting groove; 44. an annular flange.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being fixed or detachable or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, the rear lower pull rod is composed of a pull rod main body 1 and two column sleeves 2, wherein the two column sleeves 2 are vertical and symmetrically arranged at two ends of the pull rod main body 1, and the two ends of the pull rod main body 1 are symmetrically arranged.

Referring to fig. 2 to 7, the welding fixture for the rear lower pull rod of the automobile comprises a welding table, a clamping mechanism 3 arranged on the welding table and used for fixing a pull rod main body 1, a pushing mechanism 4 used for pushing two column sleeves 2 to two ends of the pull rod main body 1 respectively, and a locking mechanism 5 used for locking the current state of the pushing mechanism 4, wherein the clamping mechanism 3 comprises a positioning mechanism 6 used for positioning the pull rod main body 1 and a rotating lower pressing mechanism 7 used for pressing the pull rod main body 1, the clamping mechanism 3 is arranged in the middle of the top end of the welding table, the pushing mechanism 4 comprises a push-pull rod 8 and two feeding mechanisms 9 used for pushing the column sleeves 2, the two feeding mechanisms 9 are fixedly arranged at the tops of two ends of the welding table, each feeding mechanism 9 comprises a fixed supporting seat 10 and a carrier 11 used for connecting the column sleeves 2, the carrier 11 is movably arranged on the corresponding fixed supporting seat 10, two ends of the push-pull rod 8 are respectively connected with two carriers 11, and two groups of locking mechanisms 5 are respectively arranged on two fixed supporting seats 10. During the use put into fixture 3 with back lower link then respectively control positioning mechanism 6 and rotatory hold down mechanism 7 and press down the mechanism and press from both sides tight location and top to the back lower link and compress tightly, send the postil 2 to the both ends welding department of back lower link through feeding mechanism 9 and weld, locking mechanical system 5 locks feeding mechanism 9 current state when propelling postil 2, and the both ends welding department that keeps postil 2 in close contact with back lower link is fixed etc. treats welding robot and welds.

The positioning mechanism 6 comprises a bottom plate 12, a rotating motor 13, a gear 14, two racks 15 and two strip-shaped positioning plates 16, wherein supporting legs 17 are symmetrically and fixedly arranged at the bottoms of two ends of the bottom plate 12, the bottom plate 12 is horizontally arranged at the center of the top of the welding table, the two strip-shaped positioning plates are both horizontal and are arranged at the top of the bottom plate 12 in an attaching manner, the two strip-shaped positioning plates 16 are parallel to each other, the two racks 15 are both arranged at the bottom of the bottom plate 12 in an attaching manner, the two racks 15 are respectively and fixedly connected with the two strip-shaped positioning plates 16, the two racks 15 are parallel to each other and are both vertical to the strip-shaped positioning plates 16, the rotating motor 13 is vertically and fixedly arranged at the bottom of the table top of the welding table, an output shaft of the rotating motor upwards penetrates through the welding table and is fixedly connected with, two strip-shaped avoiding grooves 18 for avoiding the two strip-shaped positioning plates 16 from moving oppositely are symmetrically arranged on the bottom plate 12, and baffle plates for preventing the strip-shaped positioning plates 16 from sliding out of the strip-shaped avoiding grooves 18 are fixedly arranged on the two sides of the bottom plate 12 along the length direction of the bottom plate. The positioning mechanism 6 drives the gear 14 through the rotating motor 13 to drive the racks 15 engaged with two sides of the axis of the gear 14 to move oppositely, and simultaneously drives the strip-shaped positioning plates 16 arranged on the racks 15 to move oppositely to position and clamp the pull rod main body 1.

Rotatory hold-down mechanism 7 includes revolving cylinder 19, unipolar cylinder 20, support roof 21, connecting rod 22 and clamp plate 23, revolving cylinder 19 is fixed to be set up at the top of welding bench and is located the one side that feeding mechanism 9 was kept away from to the supporting seat, unipolar cylinder 20 is the fixed top output that sets up at revolving cylinder 19 of vertical state, the vertical upwards extension of output of unipolar cylinder 20, support roof 21 and unipolar cylinder 20's output fixed connection, the free end of supporting roof 21 is connected with connecting rod 22, connecting rod 22 links to each other with clamp plate 23's center department, clamp plate 23 is the horizontality and sets up directly over bottom plate 12, clamp plate 23's bottom is provided with and is used for the shape assorted rubber compact layer 24 with pull rod main part 1. Revolving cylinder 19 drives the unipolar cylinder 20 of installing on its output rotatory, unipolar cylinder 20 drives the supporting roof 21 of installing at its output and reciprocates, supporting roof 21 drives the connecting rod 22 up-and-down motion of installing on it, connecting rod 22 drives clamp plate 23 up-and-down motion, bottom plate 12 drives the laminating of rubber compact layer 24 to pull rod main part 1 and compresses tightly the assurance at the welded in-process can not squint, rotatory hold-down mechanism 7 rises and rotatory bottom plate 12 of driving leaves the top of pull rod main part 1, make it be convenient for take.

Every fixed bolster 10 is the setting of horizontal state and its bottom through the stand fixed set up on the welding bench, has seted up bar spout 25 on the fixed bolster 10, the length direction of bar spout 25 is unanimous with the length direction of the down tube structure of pull rod main part 1 tip, carrier 11 is vertical state setting and its upper end upwards passes bar spout 25 and with push-and-pull rod 8 sliding connection, the lower extreme of carrier 11 is equipped with one and is used for inserting the inboard elastic rubber head 26 of post cover 2. The elastic rubber head 26 at the lower end of the carrier 11 is inserted into the inner side of the column sleeve 2, the carrier 11 is pushed by the push-pull rod 8 to enable the carrier 11 to slide in the strip-shaped sliding groove 25 on the fixed supporting seat 10, the carrier is accurately pushed to the two welded ends of the pull rod main body 1, and the feeding deviation cannot occur.

A T-shaped sliding groove 28 which is consistent with the length direction of the push-pull rod 8 is formed in one side, close to the clamping mechanism 3, of the push-pull rod 8, two sliding blocks 29 which are matched with the T-shaped sliding groove 28 are symmetrically arranged on the push-pull rod 8, the top of the carrier 11 is fixedly connected with the sliding blocks 29, and cover plates 30 are fixedly arranged at two ends of the T-shaped sliding groove 28. The sliding block 29 movably arranged on the push-pull rod 8 is connected with the top of the carrier 11, and the push-pull rod 8 is pushed to enable the sliding block 29 to slide in the T-shaped sliding groove 28 and drive the carrier 11 to push towards the two welded ends of the pull rod main body 1 in the strip-shaped sliding groove 25.

The locking mechanism 5 comprises a bolt mechanism 31, a fixed latch mechanism 33 and a supporting side plate 34, the fixed latch mechanism 33 is matched with the bolt mechanism 31, the supporting side plate 34 is vertically and fixedly arranged on one side, away from the push-pull rod 8, of the top of the fixed supporting seat 10, the fixed latch mechanism 33 is horizontally arranged on one side, close to the push-pull rod 8, of the supporting side plate 34, and the bolt mechanism 31 is fixedly arranged on the top of one end of the push-pull rod 8 and is in clamping fit with the fixed latch mechanism 33. The push-pull rod 8 is pushed to drive the bolt mechanism 31 to be clamped in the fixed latch mechanism 33 in a segmented mode, and the column sleeve 2 is guaranteed not to shake in the moving and welding processes.

Fixed latch mechanism 33 includes rack 35 and rectangular plate 36, and rack 35 is the horizontality and sets up on the lateral wall that supports curb plate 34, and rectangular plate 36 is the level and fixed laminating sets up in rack 35's bottom, and rack 35's both ends are all fixed and are provided with limit baffle 37. The bolt mechanism 31 is clamped in the clamping rack 35, the rectangular plate 36 arranged below the clamping rack 35 supports the bolt mechanism 31, the bolt mechanism 31 is guaranteed not to fall off from the clamping rack 35 in the advancing process, the push-pull rod 8 conveys the column sleeve 2 to the welding positions at the two ends of the pull rod main body 1 and lifts the push-pull rod 8 to enable the bolt mechanism 31 to be separated from the clamping rack 35 after welding is completed, the push-pull rod 8 pulls the bolt mechanism 31 back to touch the limiting baffle plates 37 at the two ends of the clamping rack 35 to press the bolt mechanism 31 down to return to the initial position of the clamping rack 35, the elastic rubber heads 26 are continuously inserted into the next column sleeve 2, and the push-pull rod 8 continuously conveys the column sleeve 2 to the welding positions at the two ends of the rear lower pull rod, so that the use.

Bolt mechanism 31 includes cylindric lock 38, spring 39 and L type angle seat 40, L type angle seat 40 is fixed to be set up in the top of push-and-pull rod 8, cylindric lock 38 is horizontal state and sets up in the first half of L type angle seat 40, the first half of L type angle seat 40 is offered and is used for supplying perforation 41 that cylindric lock 38 passes through, the inboard symmetry of perforation 41 is provided with two spacing strips 42, the symmetry is offered two spacing grooves 43 that are used for supplying spacing strip 42 sliding connection on the outer wall of cylindric lock 38, the fixed cover in middle part of calorie post is established an annular flange 44, spring 39 overlaps and establishes in the cylindric lock 38 outside, annular flange 44 and L type angle seat 40 are contradicted respectively at the both ends of spring 39, the fixed cover of the one end that cylindric lock 38 kept away from support curb plate 34 is equipped with anticreep ring 32, the one end that cylindric lock 38 kept away from anticreep ring 32 is provided with the dead. Cylindric lock 38 passes through the activity of spacing groove 43 and sets up on L type angle seat 40, the cooperation of spacing groove 43 and spacing 42 has guaranteed that cylindric lock 38 can not take place the rotation at concertina movement's in-process, spring 39 plays flexible resilience force to cylindric lock 38, inclined plane structure 27 that cylindric lock 38 set up has guaranteed that better conflict of cylindric lock 38 is in the latch of latch strip 35, along with push-and-pull rod 8's promotion has guaranteed in the better next latch of sliding-in rack 35 of cylindric lock 38, anticreep ring 32 guarantees that cylindric lock 38 can not drop from L type angle seat 40 in concertina movement.

It should be understood that the above-described embodiments are merely preferred embodiments of the invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, such variations are within the scope of the invention as long as they do not depart from the spirit of the invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. A welding tool for a rear lower pull rod of an automobile is characterized by comprising a welding table, clamping mechanisms (3) arranged on the welding table and used for fixing a pull rod main body (1), pushing mechanisms (4) used for pushing two column sleeves (2) to two ends of the pull rod main body (1) respectively, and locking mechanisms (5) used for locking the current states of the pushing mechanisms (4), wherein each clamping mechanism (3) comprises a positioning mechanism (6) used for positioning the pull rod main body (1) and a rotating pressing mechanism (7) used for pressing the pull rod main body (1), the clamping mechanisms (3) are located in the middle of the top end of the welding table, each pushing mechanism (4) comprises a push-pull rod (8) and two feeding mechanisms (9) used for pushing the column sleeves (2), the two feeding mechanisms (9) are fixedly arranged at the tops of two ends of the welding table, each feeding mechanism (9) comprises a fixed supporting seat (10) and a carrier (11) used for connecting the column sleeves (2), the carriers (11) are movably arranged on the corresponding fixed supporting seats (10), two ends of the push-pull rod (8) are respectively connected with the two carriers (11), and two groups of locking mechanisms (5) are arranged on the two fixed supporting seats (10) respectively.

2. The welding tool for the rear lower pull rod of the automobile according to claim 1, characterized in that the positioning mechanism (6) comprises a bottom plate (12), a rotating motor (13), a gear (14), two racks (15) and two strip-shaped positioning plates (16), wherein the bottom parts of the two ends of the bottom plate (12) are symmetrically and fixedly provided with supporting legs (17), the bottom plate (12) is horizontally arranged at the center of the top of the welding table, the two strip-shaped positioning plates are both horizontal and are attached to the top of the bottom plate (12), the two strip-shaped positioning plates (16) are parallel to each other, the two racks (15) are both attached to the bottom of the bottom plate (12), the two racks (15) are respectively and fixedly connected with the two strip-shaped positioning plates (16), the two racks (15) are parallel to each other and are both perpendicular to the strip-shaped positioning plates (16), the rotating motor (13) is vertically and fixedly, and its output shaft upwards passes welding bench and gear (14) fixed connection, gear (14) are located between two rack (15), two rack (15) mesh with gear (14) simultaneously, two rack (15) set up about the axis symmetry of gear (14), the symmetry is provided with two bar dodge groove (18) that are used for dodging two bar locating plate (16) and remove in opposite directions on bottom plate (12), bottom plate (12) are provided with the baffle that is arranged in preventing bar locating plate (16) from dodging groove (18) from the bar along the both sides of self length direction are fixed.

3. The welding tool for the rear lower pull rod of the automobile according to claim 2, wherein the rotary lower pressing mechanism (7) comprises a rotary cylinder (19), a single-shaft cylinder (20), a top supporting plate (21), a connecting rod (22) and a pressing plate (23), the rotary cylinder (19) is fixedly arranged at the top of the welding table and located on one side, away from the feeding mechanism (9), of the supporting seat, the single-shaft cylinder (20) is fixedly arranged at the top output end of the rotary cylinder (19) in a vertical state, the output end of the single-shaft cylinder (20) extends vertically upwards, the top supporting plate (21) is fixedly connected with the output end of the single-shaft cylinder (20), the free end of the top supporting plate (21) is connected with the connecting rod (22), the connecting rod (22) is connected with the center of the pressing plate (23), the pressing plate (23) is horizontally arranged right above the bottom plate (12), and a rubber pressing layer (a) matched with the shape of the pull rod main body (1) is arranged at the bottom 24).

4. The welding tool for the rear drop link of the automobile as claimed in claim 1, wherein each fixed support seat (10) is arranged in a horizontal state and the bottom of the fixed support seat is fixedly arranged on the welding table through a column, a strip-shaped sliding groove (25) is formed in each fixed support seat (10), the length direction of each strip-shaped sliding groove (25) is consistent with the length direction of the inclined rod structure at the end of the pull link body (1), the carrier (11) is arranged in a vertical state, the upper end of the carrier upwards penetrates through the strip-shaped sliding groove (25) and is slidably connected with the push-pull rod (8), and the lower end of the carrier (11) is provided with an elastic rubber head (26) for inserting into the inner side of the column sleeve (2.

5. The welding tool for the rear lower pull rod of the automobile according to claim 4, wherein one side, close to the clamping mechanism (3), of the push-pull rod (8) is provided with a T-shaped sliding groove (28) consistent with the length direction of the push-pull rod, two sliding blocks (29) matched with the T-shaped sliding groove (28) are symmetrically arranged on the push-pull rod (8), the top of the carrier (11) is fixedly connected with the sliding blocks (29), and both ends of the T-shaped sliding groove (28) are fixedly provided with cover plates (30).

6. The welding tool for the rear lower pull rod of the automobile according to claim 4, wherein the locking mechanism (5) comprises a bolt mechanism (31), a fixed latch mechanism (33) and a supporting side plate (34), the fixed latch mechanism (33) is matched with the bolt mechanism (31), the supporting side plate (34) is vertically and fixedly arranged on one side, away from the push-pull rod (8), of the top of the fixed supporting seat (10), the fixed latch mechanism (33) is horizontally arranged on one side, close to the push-pull rod (8), of the supporting side plate (34), and the bolt mechanism (31) is fixedly arranged on the top of one end of the push-pull rod (8) and is in clamping fit with the fixed latch mechanism (33).

7. The welding tool for the rear lower pull rod of the automobile according to claim 6, wherein the fixed latch mechanism (33) comprises a latch rack (35) and a rectangular plate (36), the latch rack (35) is horizontally arranged on the side wall of the support side plate (34), the rectangular plate (36) is horizontally arranged and fixedly attached to the bottom of the latch rack (35), and two ends of the latch rack (35) are fixedly provided with limit baffles (37).

8. The welding tool for the rear lower pull rod of the automobile according to claim 7, wherein the bolt mechanism (31) comprises a cylindrical pin (38), a spring (39) and an L-shaped angle seat (40), the L-shaped angle seat (40) is fixedly arranged at the top of the push-pull rod (8), the cylindrical pin (38) is horizontally arranged at the upper half part of the L-shaped angle seat (40), a through hole (41) for the cylindrical pin (38) to pass through is formed in the upper half part of the L-shaped angle seat (40), two limiting strips (42) are symmetrically arranged on the inner side of the through hole (41), two limiting grooves (43) for the limiting strips (42) to be in sliding connection are symmetrically formed in the outer wall of the cylindrical pin (38), an annular flange (44) is fixedly sleeved in the middle of the clamping column, the spring (39) is sleeved on the outer side of the cylindrical pin (38), two ends of the spring (39) respectively abut against the annular flange (44) and the L-shaped angle seat (40), the fixed cover of the one end that supports curb plate (34) is kept away from in cylindric lock (38) is equipped with anticreep ring (32), and the one end that anticreep ring (32) were kept away from in cylindric lock (38) is provided with and blocks dead inclined plane structure (27) of rack (35) one-way card.