Engineering mechanical arm positioning and welding equipment

Abstract

The invention discloses engineering mechanical arm positioning and welding equipment, and relates to the technical field of welding, the engineering mechanical arm positioning and welding equipment comprises a welding unit which comprises a mechanical arm, a base arranged at the bottom of the mechanical arm, and a welding gun arranged at the tail end execution end of the mechanical arm; the moving unit comprises a supporting assembly, a pair of guide rails arranged at the upper end of the supporting assembly, a rack arranged on one side of one guide rail and a sliding table arranged on the surfaces of the guide rails. The sliding table has the beneficial effects that in the operation process of the rail type welding robot, even if the sliding table is clamped on the guide rail due to sundries, deformation or insufficient lubrication, transmission between the sliding table and the straight gear can be disconnected, and therefore the situation that a transmission part is damaged or a motor is damaged is avoided; and in the normal welding work, after the robot reaches the set position, the straight gear can be locked, and the situation that the welding precision is affected due to the fact that the sliding table is subjected to external force is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to a positioning welding device for an engineering mechanical arm. Background Art

[0002] When dealing with welding tasks of very large workpieces, traditional clamping and flipping methods often have many problems due to the complex shape, weight and distribution of welds. With the continuous advancement of automation technology, the application of robots is becoming more and more extensive, especially track-type welding robots. These robots can be fixed on a mobile platform by hanging upright, sideways or upside down to achieve flexible processing and positioning. Track-operated systems driven by servo motors or stepper motors have become particularly popular due to their accuracy and repeatability.

[0003] In particular, the mobile platform driven by the rack and pinion module, combined with the use of stepper motors or servo motors, has the characteristics of simple structure, easy maintenance and long travel. During the transmission process, the track may become stuck due to the accumulation of debris or foreign matter, the slide rail may be deformed due to the impact of external force, or the friction may increase sharply due to insufficient lubrication, causing overheating or jamming, which may cause the transmission system to be subjected to a large load, resulting in the breakage of the transmission shaft, the collapse of the gear teeth, or the burning of the motor. In addition, the self-locking ability of the track motion under the rack and pinion module is poor, and the anti-interference ability to external forces is weak. If it is disturbed by external forces, the mobile platform will move, causing the positioning accuracy of the welding robot to be seriously disturbed. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide an engineering robot arm positioning welding device, which can solve the problem that the slide rail may be stuck due to debris, deformation or insufficient lubrication during the operation of the rail welding robot, resulting in damage to the transmission parts or motor. At the same time, it solves the problem that the self-locking performance of the rack-and-pinion driven rail is insufficient and it is easily affected by external forces, which interferes with the welding accuracy.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: an engineering mechanical arm positioning welding device, comprising a welding unit, including a mechanical arm, a base arranged at the bottom of the mechanical arm, and a welding gun arranged at the end execution end of the mechanical arm; The mobile unit comprises a support assembly, a pair of guide rails arranged at the upper end of the support assembly, a rack arranged at one side of one of the guide rails, and a slide arranged on the surface of the guide rail; the mechanical arm is fixed on the upper surface of the slide; the slide cooperates with the guide rail; The drive unit includes a bracket arranged on one side of the slide surface, a motor arranged on the upper end of the bracket, a reducer arranged on the end of the motor shaft, a coupling arranged on the outer wall of the motor shaft and the reducer input shaft, and a transmission assembly arranged at the lower end of the reducer output shaft.

[0007] As a preferred solution of the engineering mechanical arm positioning welding equipment described in the present invention, the supporting assembly includes a pair of C-shaped channel steels, a plurality of anchor plates arranged at the bottom of the C-shaped channel steels, a plurality of vertical channel steels arranged between the C-shaped channel steels, a rectangular tube arranged at the top of the C-shaped channel steels, a plurality of rib plates arranged between the rectangular tubes, and a pad arranged at the top of the rectangular tube.

[0008] As a preferred solution of the engineering mechanical arm positioning welding equipment of the present invention, wherein: the bracket includes a first support frame and a second support frame.

[0009] As a preferred solution of the engineering robot arm positioning welding equipment described in the present invention, the transmission assembly includes a trigger part arranged on the output shaft of the reducer, a spur gear arranged at the bottom of the trigger part, a sliding sleeve arranged on the outer wall of the trigger part, a lifting rod arranged through the upper end of the sliding sleeve, a spring arranged at the bottom of the sliding sleeve, and a locking cage arranged on the periphery of the lifting rod.

[0010] As a preferred solution of the engineering mechanical arm positioning welding equipment of the present invention, the trigger part includes a pair of trigger posts arranged on the outer wall of the reducer output shaft, and a clamping groove arranged below the trigger posts.

[0011] As a preferred solution of the engineering robot arm positioning welding equipment described in the present invention, the spur gear includes a stepped shaft arranged on its end face, a pair of driving columns arranged on the outer wall of the stepped shaft, a locking cavity arranged at the upper end of the stepped shaft, and a plurality of locking grooves arranged around the stepped shaft.

[0012] As a preferred solution of the engineering robot arm positioning welding equipment described in the present invention, the sliding sleeve includes a pair of trapezoidal grooves arranged at the extension of its upper end surface, a pair of straight notches arranged on the walls of one of the trapezoidal grooves, a pair of T-slots arranged through the side walls of the sliding sleeve, and a spring support surface arranged at the bottom of the sliding sleeve.

[0013] As a preferred solution of the engineering mechanical arm positioning welding equipment described in the present invention, the lifting rod includes an oblique triangle arranged on its top, a movable groove arranged on the side wall of the lifting rod, and a lifting hook arranged on the bottom of the lifting rod.

[0014] As a preferred solution of the engineering mechanical arm positioning welding equipment of the present invention, the locking cage includes a circular ring, a plurality of locking rods penetrating the surface of the slide, and a blade head arranged at the bottom of the locking rod.

[0015] The beneficial effects of the present invention are as follows: the present invention can disconnect the transmission with the spur gear when the rail-type welding robot is in operation, even if the slide is stuck on the guide rail due to debris, deformation or insufficient lubrication, thereby avoiding the situation where the transmission parts are damaged or the motor is damaged; and in normal welding work, after the robot reaches a predetermined position, the spur gear can be locked to prevent the slide from being affected by external forces and affecting the welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is an overall three-dimensional schematic diagram of the present invention.

[0018] Figure 2 It is an exploded view of the welding unit and the moving unit of the present invention.

[0019] Figure 3 It is an exploded view of the drive unit of the present invention.

[0020] Figure 4 It is an overall three-dimensional schematic diagram of the driving unit of the present invention.

[0021] Figure 5 It is a full cross-sectional view of the drive unit of the present invention cut along the axial direction of the trigger column.

[0022] Figure 6 It is a full cross-sectional view of the driving unit of the present invention perpendicular to the axial extension direction of the trigger column. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1: Reference Figure 1~Figure 2 , which is the first embodiment of the present invention, and provides an engineering mechanical arm positioning welding device, which includes a welding unit 1, including a mechanical arm 11, a base 12 arranged at the bottom of the mechanical arm 11, and a welding gun 13 arranged at the end execution end of the mechanical arm 11; The mobile unit 2 includes a support assembly 21, a pair of guide rails 22 arranged at the upper end of the support assembly 21, a rack 23 arranged at one side of one of the guide rails 22, and a slide 24 arranged on the surface of the guide rail 22; the robot arm 11 is fixed on the upper surface of the slide 24; the slide 24 cooperates with the guide rail 22; The driving unit 3 includes a bracket 31 arranged on one side of the surface of the slide 24, a motor 32 arranged on the upper end of the bracket 31, a reducer 33 arranged on the shaft end of the motor 32, a coupling 34 arranged on the outer wall of the rotating shaft of the motor 32 and the input shaft of the reducer 33, and a transmission assembly 35 arranged at the lower end of the output shaft of the reducer 33.

[0027] Furthermore, the bracket 31 includes a first support frame 311 and a second support frame 312 .

[0028] It should be noted that the support assembly 21 is used to carry the guide rail 22 and the slide 24 matched therewith. The support assembly 21 is usually a pair, which can be a pair of wooden strips, or steel, in the shape of strips. The guide rail 22 can be fixed on the upper surface of the support assembly 21, and the slide 24 can move axially along the guide rail 22, which is especially necessary for robots with larger workpieces or multi-threaded work.

[0029] Preferably, when performing automated welding of workpieces, a multi-axis robot arm 11 is required. A base 12 is provided at the bottom of the robot arm 11 and can be fixed to the slide 24. The end actuator of the robot arm 11 is a welding gun 13 in this embodiment.

[0030] Preferably, in order to enable the slide 24 to move, a screw pair, a sprocket chain, and a gear rack module are used for transmission. Under the welding conditions of large workpieces, the gear rack module has the characteristics of long stroke, simple structure, stable operation, and high stroke accuracy, which is suitable for this scenario. Specifically, on the support assembly 21, on one side of one of the guide rails 22, a rack 23 whose extension direction is consistent with the guide rail 22 is fixed.

[0031] Preferably, a bracket 31 is fixed on the surface of the slide 24 at a position adjacent to the robot arm 11. The bracket 31 is mainly used to fix the motor 32 and the reducer 33, wherein the motor 32 is fixed on the first support frame 311 with a higher height, and the shaft end of the motor 32 faces downward, and is usually driven by a servo motor or a stepper motor, and the reducer 33 is fixed on the second support frame 312 with a lower height, and the input shaft of the reducer 33 is fixedly connected to the rotating shaft of the motor 32 through a coupling 34. When the motor 32 is working, the input shaft of the reducer 33 rotates with it, and the output shaft rotates at a lower speed through the deceleration and torque increase of the reducer 33, and drags the high-load transmission component 35. In this embodiment, the reducer 33 adopts a planetary gear reducer.

[0032] Preferably, the transmission assembly 35 can be a gear with a shaft, and the gear shaft passes through the slide 24 and is connected to the output shaft of the reducer 33, usually using a coupling. At this time, the gear is below the slide 24 and can be meshed with the rack 23. When the motor 32 is driven, the gear rotates accordingly and moves axially along the rack 23, and the slide 24 moves linearly on the guide rail 22. Thereby, the robot arm 11 can weld at different positions of a large workpiece.

[0033] Preferably, the support assembly 21 includes a pair of C-shaped channel steels 211, a plurality of anchor plates 212 arranged at the bottom of the C-shaped channel steels 211, a plurality of vertical channel steels 213 arranged between the C-shaped channel steels 211, a rectangular tube 214 arranged at the top of the C-shaped channel steel 211, a plurality of rib plates 215 arranged between the rectangular tubes 214, and a pad 216 arranged at the top of the rectangular tube 214.

[0034] Since the robot arm 11 needs more stability when working, and the support assembly 21 also needs to withstand the high-frequency, high-load movement of the slide 24 and its supporting parts, the support assembly 21 needs to use a more durable, firm and stable structure. Therefore, two symmetrically distributed C-shaped channel steels 211 are required as supports. The C-shaped channel steels 211 are distributed oppositely, and evenly distributed vertical channel steels 213 are fixed inside the opening of the C-shaped channel steels 211, thereby forming a stable support structure. In addition, in order to ensure that the support structure does not shake or deviate when the robot arm 11 moves, evenly distributed anchor plates 212 are also fixed at the bottom of the C-shaped channel steels 211, and the anchor plates 212 can be fixed to the ground by expansion bolts.

[0035] A rectangular tube 214 is fixed to each upper end of the C-shaped channel steel 211. The rectangular tube 214 can raise the working height of the robot arm 11 and can be stacked upward according to actual needs. In order to further ensure the stability of the connection of the rectangular tube 214, a uniformly distributed rib plate 215 is fixed between two symmetrically distributed rectangular tubes 214. In addition, chain plates and cables can be laid on the two rectangular tubes 214 to power the robot arm 11.

[0036] A pad 216 is also fixed on the upper surface of the rectangular tube 214, and a guide rail 22 is fixed on the pad 216. The pad 216 can play a role of shock absorption and buffering when the robot arm 11 moves or operates.

[0037] Example 2: Reference Figure 1 to Figure 6 , which is the second embodiment of the present invention, and is different from the first embodiment in that: it also includes a transmission assembly 35 including a trigger part 351 arranged on the output shaft of the reducer 33, a spur gear 352 arranged at the bottom of the trigger part 351, a sliding sleeve 353 sleeved on the outer wall of the trigger part 351, a lifting rod 354 penetrating the upper end of the sliding sleeve 353, a spring 355 arranged at the bottom of the sliding sleeve 353, and a locking cage 356 arranged on the periphery of the lifting rod 354.

[0038] Furthermore, the triggering portion 351 includes a pair of triggering posts 3511 disposed on the outer wall of the output shaft of the reducer 33 , and a locking groove 3512 disposed below the triggering posts 3511 .

[0039] Furthermore, the spur gear 352 includes a stepped shaft 3521 arranged on its end surface, a pair of driving columns 3522 arranged on the outer wall of the stepped shaft 3521 , a locking cavity 3523 arranged on the upper end of the stepped shaft 3521 , and a plurality of locking grooves 3524 arranged around the stepped shaft 3521 .

[0040] Furthermore, the sleeve 353 includes a pair of trapezoidal grooves 3531 arranged at the extension of its upper end surface, a pair of straight grooves 3532 arranged on the groove wall of one of the trapezoidal grooves 3531, a pair of T-grooves 3533 penetrating the side walls of the sleeve 353, and a spring support surface 3534 arranged at the bottom of the sleeve 353.

[0041] Furthermore, the lifting rod 354 includes an oblique triangle 3541 disposed on the top thereof, a movable groove 3542 disposed on the side wall of the lifting rod 354 , and a lifting hook 3543 disposed on the bottom of the lifting rod 354 .

[0042] Furthermore, the locking cage 356 includes a circular ring 3561 , a plurality of locking rods 3562 penetrating the surface of the slide 24 , and a blade head 3563 disposed at the bottom of the locking rods 3562 .

[0043] It should be noted that the trigger portion 351 is located at the lower end of the output shaft of the reducer 33. Specifically, two symmetrically distributed trigger columns 3511 are fixed to the outer wall of the output shaft of the reducer 33, and an annular engaging groove 3512 is provided below the trigger column 3511. The engaging groove 3512 can extend into the interior of the engaging cavity 3523 on the spur gear 352, and a limiting ring is also provided at the opening of the engaging cavity 3523. The limiting ring can just be engaged in the engaging groove 3512. Therefore, there is no direct transmission relationship between the output shaft of the reducer 33 and the stepped shaft 3521 on the spur gear 352, but they are axially connected.

[0044] Preferably, the spur gear 352 is the gear in the previous embodiment, which is located below the slide 24 and meshes with the rack 23. A stepped shaft 3521 is also fixed on the upper surface of the spur gear 352. The stepped shaft 3521 completely penetrates the slide 24 and is movably connected to the output shaft of the reducer 33. The shoulder on the stepped shaft 3521 is used to limit the spring 355, and the spring 355 is sleeved on the outer wall of the thin shaft of the stepped shaft 3521. A clamping cavity 3523 is also opened in the center of the stepped shaft 3521 to accommodate the end of the output shaft of the reducer 33.

[0045] Two symmetrically distributed driving columns 3522 are fixed on the outer wall of the stepped shaft 3521. An axially distributed locking groove 3524 is opened on the upper surface of the spur gear 352 at the position where the stepped shaft 3521 is connected to the spur gear 352 and around the stepped shaft 3521. The groove shape of the locking groove 3524 is approximately an acute triangle.

[0046] Preferably, the sleeve 353 is sleeve-shaped, and covers the trigger part 351 and the stepped shaft 3521 at the same time. The upper surface of the sleeve 353 is also provided with inverted trapezoidal grooves 3531, the number of which is the same as the trigger column 3511, and two straight notches 3532 are symmetrically distributed on the inclined groove wall of one of the trapezoidal grooves 3531, or both of the two trapezoidal grooves 3531 are provided with a pair of straight notches 3532, the straight notches 3532 are through grooves, and the groove shape is consistent with the rod body of the lifting rod 354, which is rectangular in this embodiment, so the lifting rod 354 can move axially inside the straight notches 3532.

[0047] It should be noted that, in this embodiment, the sliding sleeve 353 is also stepped, so that the lifting rod 354 can penetrate the upper end portion of the sliding sleeve 353 .

[0048] The side wall of the sliding sleeve 353 is provided with through and symmetrically distributed T-grooves 3533, the number of which is the same as the driving column 3522. A spring support surface 3534 is also fixed at the bottom of the sliding sleeve 353, which together with the shoulder of the stepped shaft 3521 constrains the spring 355, so that the sliding sleeve 353 is always pushed up.

[0049] It should be noted that the trapezoidal groove 3531 is directly opposite to the trigger column 3511, the trigger column 3511 is in contact with the bottom of the trapezoidal groove 3531, and the driving column 3522 directly passes through the vertical notch of the T-slot 3533. Therefore, when the motor 32 is driven, the output shaft of the reducer 33 is driven to rotate, and the trigger column 3511 at this time will contact the inclined wall of the trapezoidal groove 3531 due to rotation, and then drive the sliding sleeve 353 to rotate, and the driving column 3522 is located at the vertical notch of the T-slot 3533. At this time, the driving column 3522 will also rotate with the sliding sleeve 353 to realize the control of the spur gear 352.

[0050] Normally, when the slide rail is stuck due to debris, deformation or insufficient lubrication, the spur gear 352 cannot be driven to rotate because the slide 24 cannot move. At this time, the entire transmission part including the shaft, the shaft connection part, and the gear meshing part may break, or the motor 32 may burn out directly due to excessive load. In the present solution, when the above situation occurs, the trigger column 3511 will overcome the elastic force of the spring 355 during the rotation process and press down the inclined groove wall of the trapezoidal groove 3531, and the sleeve 353 will move downward. At this time, the horizontal notch of the T-slot 3533 is aligned with the driving column 3522. At this time, since the trigger column 3511 scrapes the upper end surface of the sleeve 353, the sleeve 353 is driven to rotate through friction. Since the motor 32 can rotate in both directions, the driving column 3522 will be forced to enter one of the horizontal end positions of the T-slot 3533. At this time, the sleeve 353 cannot be reset upward. At this time, the power at the output shaft of the reducer 33 is interrupted, and it is impossible to establish transmission with the spur gear 352, thereby avoiding the breakage of the transmission parts or the burning of the motor 32.

[0051] When resetting is required, the sliding sleeve 353 is rotated in the reverse direction so that the vertical portion of the T-slot 3533 on the sliding sleeve 353 is aligned with the driving column 3522 again, and then the sliding sleeve 353 is reset upward, and the transmission is reestablished at this time.

[0052] Preferably, a lifting rod 354 is sleeved inside the straight slot 3532, and two lifting rods 354 are symmetrically distributed. An oblique triangle 3541 is fixed on the top of the lifting rod 354, and the inclined surface faces the direction of the outer wall of the trigger column 3511, that is, obliquely downward, and the two inclined surfaces are relatively distributed. On the side of the lifting rod 354 pointing to the center of the sliding sleeve 353, a movable groove 3542 is also opened, and the groove width is just enough to accommodate the trigger column 3511. A lifting hook 3543 is fixed on the bottom of the lifting rod 354, facing away from the center of the sliding sleeve 353.

[0053] Preferably, a locking cage 356 is also provided on the periphery of the sliding sleeve 353, a circular ring 3561 is hung on the upper surface of the lifting hook 3543, and a plurality of locking rods 3562 are fixed to the bottom of the circular ring 3561, the locking rods 3562 completely penetrate the slide 24 and extend to the locking groove 3524, so that the locking cage 356 can move linearly up and down, and the lower end of the locking rod 3562 is a blade head 3563, which can be inserted into the locking groove 3524. At this time, the spur gear 352 cannot rotate, thereby locking the entire slide 24, thereby enhancing the ability to resist external interference.

[0054] During use, when no overload occurs: The motor 32 drives the output shaft of the reducer 33 to rotate, and the trigger column 3511 first pushes the oblique triangle 3541 upward, and the lifting rod 354 also moves upward, thereby driving the locking cage 356 upward. At this time, the spur gear 352 is unlocked, and then the trigger column 3511 will pass through the movable groove 3542, and then contact and push the side wall of the trapezoidal groove 3531, so that the sliding sleeve 353 rotates. At this time, the sliding sleeve 353 drives the spur gear 352 to rotate, and then realizes the flexible movement of the slide 24 on the guide rail 22.

[0055] When the robot arm 11 reaches a certain position and needs to perform welding work, the motor 32 needs to reverse so that the trigger column 3511 leaves the oblique triangle 3541 until it reaches the center of the bottom of the trapezoidal groove 3531. At this time, the lifting rod 354 drops under its own weight, so that the blade head 3563 on the locking cage 356 is inserted into the locking groove 3524. At this time, the spur gear 352 is locked, and the slide 24 will not move due to external force.

[0056] During use, when overload occurs: The motor 32 drives the output shaft of the reducer 33 to rotate, and the trigger column 3511 first pushes the oblique triangle 3541 upward, and the lifting rod 354 also moves upward. Since the spur gear 352 is locked, the trigger column 3511 will then pass through the movable groove 3542, and then contact and push the side wall of the trapezoidal groove 3531, so that the sliding sleeve 353 moves downward until the transverse groove of the T-slot 3533 is aligned with the driving column 3522, and then the friction between the trigger column 3511 and the upper end surface of the sliding sleeve 353 drives the sliding sleeve 353 to rotate, so that the driving column 3522 enters the end of the transverse groove of the T-slot 3533, so that the reset of the sliding sleeve 353 is blocked by the driving column 3522, and at this time, the transmission of the spur gear 352 on the output shaft of the reducer 33 is disconnected.

[0057] When resetting is required, the sleeve 353 needs to be manually rotated so that the vertical groove of the T-slot 3533 is aligned with the driving column 3522, and then the sleeve 353 is reset, and the transmission is reestablished.

[0058] In summary, this solution enables the rail-type welding robot to disconnect the transmission with the spur gear 352 even if the slide 24 is stuck on the guide rail 22 due to debris, deformation or insufficient lubrication during operation, thereby avoiding damage to the transmission parts or the motor; and in normal welding work, after the robot reaches the predetermined position, it can lock the spur gear 352 to prevent the slide 24 from being affected by external forces and affecting the welding accuracy.

[0059] It is important to note that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An engineering mechanical arm positioning welding device, characterized in that: include, A welding unit (1) comprising a mechanical arm (11), a base (12) arranged at the bottom of the mechanical arm (11), and a welding gun (13) arranged at the end execution end of the mechanical arm (11); The mobile unit (2) comprises a support assembly (21), a pair of guide rails (22) arranged at the upper end of the support assembly (21), a rack (23) arranged on one side of one of the guide rails (22), and a slide table (24) arranged on the surface of the guide rail (22); the mechanical arm (11) is fixed on the upper surface of the slide table (24); the slide table (24) cooperates with the guide rail (22); The drive unit (3) comprises a bracket (31) arranged on one side of the surface of the slide table (24), a motor (32) arranged on the upper end of the bracket (31), a reducer (33) arranged on the shaft end of the motor (32), a coupling (34) arranged on the outer wall of the motor (32) rotating shaft and the input shaft of the reducer (33), and a transmission assembly (35) arranged on the lower end of the output shaft of the reducer (33).

2. The engineering mechanical arm positioning welding equipment according to claim 1, characterized in that: The support assembly (21) comprises a pair of C-shaped channel steels (211), a plurality of anchor plates (212) arranged at the bottom of the C-shaped channel steels (211), a plurality of vertical channel steels (213) arranged between the C-shaped channel steels (211), a rectangular tube (214) arranged at the top of the C-shaped channel steels (211), a plurality of rib plates (215) arranged between the rectangular tubes (214), and a pad (216) arranged at the top of the rectangular tube (214).

3. The engineering mechanical arm positioning welding equipment according to claim 1 or 2, characterized in that: The support (31) comprises a first support frame (311) and a second support frame (312).

4. The engineering mechanical arm positioning welding equipment according to claim 3, characterized in that: The transmission assembly (35) includes a trigger portion (351) arranged on the output shaft of the reducer (33), a spur gear (352) arranged at the bottom of the trigger portion (351), a sliding sleeve (353) sleeved on the outer wall of the trigger portion (351), a lifting rod (354) penetrating and arranged at the upper end of the sliding sleeve (353), a spring (355) arranged at the bottom of the sliding sleeve (353), and a locking cage (356) arranged on the periphery of the lifting rod (354).

5. The engineering mechanical arm positioning welding equipment according to claim 4, characterized in that: The trigger portion (351) comprises a pair of trigger columns (3511) arranged on the outer wall of the output shaft of the reducer (33), and a snap-fitting groove (3512) arranged below the trigger columns (3511).

6. The engineering mechanical arm positioning welding equipment according to claim 4, characterized in that: The spur gear (352) comprises a stepped shaft (3521) arranged on its end surface, a pair of driving columns (3522) arranged on the outer wall of the stepped shaft (3521), a locking cavity (3523) arranged on the upper end of the stepped shaft (3521), and a plurality of locking grooves (3524) arranged around the stepped shaft (3521).

7. The engineering mechanical arm positioning welding equipment according to claim 4, characterized in that: The sliding sleeve (353) comprises a pair of trapezoidal grooves (3531) arranged at the extension of its upper end surface, a pair of straight notches (3532) arranged on the groove wall of one of the trapezoidal grooves (3531), a pair of T-grooves (3533) penetrating the side wall of the sliding sleeve (353), and a spring support surface (3534) arranged at the bottom of the sliding sleeve (353).

8. The engineering mechanical arm positioning welding equipment according to claim 4, characterized in that: The lifting rod (354) comprises an oblique triangle (3541) arranged on the top thereof, a movable groove (3542) arranged on the side wall of the lifting rod (354), and a lifting hook (3543) arranged on the bottom of the lifting rod (354).

9. The engineering mechanical arm positioning welding equipment according to any one of claims 5 to 8, characterized in that: The locking cage (356) comprises a circular ring (3561), a plurality of locking rods (3562) penetrating the surface of the slide (24), and a blade head (3563) disposed at the bottom of the locking rods (3562).

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