CN221891211U - Welding robot - Google Patents

Abstract

The utility model discloses a welding robot which comprises a power-assisted cart, a moving platform, a welding mechanical arm, a positioning clamp and a locking mechanism, wherein the power-assisted cart is arranged on the moving platform; the mobile platform is movably connected with the power-assisted cart, and can slide relative to the power-assisted cart along a first direction and a second direction, and the first direction and the second direction are vertically arranged; the welding mechanical arm is arranged on the mobile platform, and a welding gun is arranged at the output end of the welding mechanical arm; the positioning clamp is rotationally connected with the fixed end of the welding robot; the locking mechanism is used for fixing the positioning clamp and the mobile platform. According to the utility model, the welding robot takes the power-assisted cart as a carrier, and the positioning clamp and the welding mechanical arm synchronously move, so that the relative positions of the mechanical arm and a workpiece to be welded are ensured to be effective, and the welding mechanical arm is convenient to carry out subsequent welding work. In this embodiment, the positioning fixture is used for completely positioning the workpiece to be welded, so that the precision requirement before positioning is reduced, the positioning structure is simplified, and the cost is reduced without being matched with a vision system.

Description

Welding robot

Technical Field

The utility model relates to the technical field of machining equipment, in particular to a welding robot.

Background

With market development, traditional manual welding has failed to meet the demand. In order to ensure welding quality, the welding is being converted from manual welding to machine welding at present, when the machine welding is carried out, the welding machine is usually required to be matched with a vision system due to the precision requirement of the welding, after the vision system detects the position of a workpiece, a controller processes and controls a welding arm to weld the workpiece, so that the whole welding equipment has a complex structure and high cost.

Disclosure of utility model

The utility model mainly aims to provide a welding robot which aims to solve the problems of complex structure and high cost of welding equipment.

In order to achieve the above purpose, the utility model provides a welding robot, which comprises a power-assisted cart, a moving platform, a welding mechanical arm, a positioning clamp and a locking mechanism; the mobile platform is movably connected with the power-assisted cart, and can slide relative to the power-assisted cart along a first direction and a second direction, and the first direction and the second direction are vertically arranged; the welding mechanical arm is arranged on the mobile platform, and a welding gun is arranged at the output end of the welding mechanical arm; the positioning clamp is rotationally connected with the fixed end of the welding robot; the locking mechanism is used for fixing the positioning clamp and the mobile platform.

Optionally, a connecting frame is arranged at the fixed end of the welding mechanical arm, and the positioning clamp is rotationally connected with the connecting frame; the locking mechanism comprises a ratchet wheel and a shifting piece, the ratchet wheel is fixedly connected with the connecting frame, the shifting piece is rotationally connected with the positioning clamp, and the end part of the shifting piece can be clamped into a tooth slot of the ratchet wheel to lock the positioning clamp and the connecting frame.

Optionally, the welding robot further comprises a connecting plate, and the connecting plate is arranged between the power-assisted cart and the moving platform; the two sides of the connecting plate are respectively provided with a first sliding block and a second sliding block; the power-assisted trolley is provided with a first sliding rail, and the first sliding block is in sliding connection with the first sliding rail along a first direction; the mobile platform is provided with a second sliding rail, and the second sliding block is in sliding connection with the second sliding rail along a second direction.

Optionally, two first limiting blocking pieces are arranged on the power-assisted cart at intervals along a first direction, and the first limiting blocking pieces are used for limiting and stopping the connecting plate so as to limit the travel of the mobile platform along the first direction; and/or, be connected with the spacing separation blade of second on the mobile platform, set up the dog on the helping hand shallow, the spacing separation blade of second limit is located the dog with between the connecting plate is in order to restrict mobile platform is along the stroke of second direction.

Optionally, the positioning fixture comprises a fixture main body, a first positioning mechanism and a second positioning mechanism, and the fixture main body is rotationally connected with the connecting frame; the first positioning mechanism comprises a first positioning piece and a second positioning piece which are oppositely arranged along a third direction, the first positioning piece is fixedly connected with the clamp main body, the second positioning piece is slidably connected with the clamp main body, and the second positioning piece can slide along the first direction to be matched with the first positioning piece to clamp a workpiece to be welded or loosen the workpiece to be welded; the second positioning mechanism comprises a third positioning piece and a fourth positioning piece which are arranged at intervals along a fourth direction, the third positioning piece is fixedly connected with the clamp main body, the fourth positioning piece is rotationally connected with the clamp main body, and the fourth positioning piece rotates to clamp a workpiece to be welded or loosen the workpiece to be welded in cooperation with the third positioning piece; wherein the third direction and the fourth direction are perpendicular to each other.

Optionally, the fourth locating piece includes pivot and eccentric wheel, the eccentric wheel cover is located the one end of pivot, the eccentric wheel with the work piece is to the centre gripping wait to weld to the cooperation of third locating piece.

Optionally, a locking seat is arranged on the clamp main body, and a clamping groove is formed in the locking seat; the fourth locating piece further comprises a locking rod, the locking rod is rotationally connected with the other end of the rotating shaft, and the locking rod can rotate relative to the rotating shaft to be clamped into the clamping groove.

Optionally, the second positioning piece comprises a sliding table, a connecting rod assembly and a positioning block; the sliding table is in sliding connection with the clamp main body, one end of the connecting rod assembly is hinged with the sliding table, the other end of the connecting rod assembly is hinged with the clamp main body, and the connecting rod assembly is used for driving the sliding table to move.

Optionally, the welding robot further comprises a wire feeder for feeding welding wire to the welding gun.

Optionally, the number of the positioning fixtures is two, and the two positioning fixtures are respectively arranged at two sides of the welding mechanical arm.

According to the technical scheme, the welding robot takes the power-assisted trolley as a carrier, and moves to the platform trolley body by moving the power-assisted trolley. The welding mechanical arm realizes accurate and flexible rotation of specific angles and movable positions of each joint by depending on an internal brushless servo motor. The welding robot moves to the approximately nearest welding position of the carriage through the power-assisted cart, after the positioning clamp is manually rotated and lowered, the positioning clamp is moved to position the workpiece to be welded, the positioning clamp is connected with the welding mechanical arm, and the welding mechanical arm can move along with the positioning clamp when the positioning clamp is dragged to position a product, so that the relative position of the mechanical arm and the workpiece to be welded is ensured to be effective. Thereby facilitating the subsequent welding work of the welding mechanical arm. In this embodiment, the positioning fixture is used for completely positioning the workpiece to be welded, so that the precision requirement before positioning is reduced, the positioning structure is simplified, and the cost is reduced without being matched with a vision system.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a welding robot according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram illustrating a connection between a welding robot and a power-assisted cart according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a clamp in an operating position according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a clamp in a non-operative position according to an embodiment of the present utility model;

Fig. 5 is a schematic diagram of a connection structure between a first positioning mechanism, a second positioning mechanism and a clamp body in an embodiment of the present utility model.

Reference numerals illustrate:

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

The utility model provides a welding robot, which aims to solve the problems of complex structure and high cost of welding equipment.

As shown in fig. 1 and 2, in an embodiment of the present utility model, a welding robot 100 includes a booster cart 1, a moving platform 2, a welding robot arm 3, a positioning jig 4, and a locking mechanism 5; the mobile platform 2 is movably connected with the power-assisted cart 1, the mobile platform 2 can slide relative to the power-assisted cart 1 along a first direction and a second direction, and the first direction and the second direction are vertically arranged; the welding mechanical arm 3 is arranged on the mobile platform 2, and a welding gun 31 is arranged at the output end of the welding mechanical arm 3; the positioning clamp 4 is rotationally connected with the fixed end of the welding robot 100; the locking mechanism 5 is used for fixing the positioning fixture 4 and the mobile platform 2.

In the above embodiment, the welding robot 100 takes the booster cart 1 as a carrier, and moves the booster cart 1 to the platform car body. The welding robot arm 3 realizes accurate and flexible rotation of specific angles and movable positions of each joint by relying on an internal brushless servo motor. The welding robot 100 moves to the approximately nearest welding position of the carriage through the power-assisted cart 1, after the positioning clamp 4 is manually rotated and put down, the positioning clamp 4 is moved to position the workpiece to be welded, the positioning clamp 4 is connected with the welding mechanical arm 3, and the welding mechanical arm 3 moves along with the positioning clamp 4 when the positioning clamp 4 is dragged to position a product, so that the relative position of the mechanical arm and the workpiece to be welded is ensured to be effective. Thereby facilitating the subsequent welding work of the welding mechanical arm 3. In this embodiment, the positioning fixture 4 is used for completely positioning the workpiece to be welded, so that the precision requirement before positioning is reduced, the positioning structure is simplified, and the cost is reduced without being matched with a vision system.

In this embodiment, the welding robot arm 3 adopts a robot arm in the prior art, and the specific structure of the welding robot arm 3 is not limited in this embodiment. In the embodiment, the welding mechanical arm 3 is provided with a rotating shaft 4321 and linear guide rails in the X and Y directions on the base, so that the clamping position of the clamp can be easily rotated, moved and adjusted.

In this embodiment, the booster cart 1 uses an electric control motor to drive the tire to rotate through a steering handle. On an uphill road section, since the whole machine is heavy and it is difficult to pull by manpower entirely, the booster cart 1 is provided as a manual assist to control the movement and operation of the welding robot 100.

In an embodiment, a connecting frame 32 is arranged at the fixed end of the welding mechanical arm 3, and the positioning clamp 4 is rotationally connected with the connecting frame 32; the locking mechanism 5 comprises a ratchet wheel 51 and a shifting piece 52, the ratchet wheel 51 is fixedly connected with the connecting frame 32, the shifting piece 52 is rotationally connected with the positioning clamp 4, and the end part of the shifting piece 52 can be clamped into a tooth groove of the ratchet wheel 51 to lock the positioning clamp 4 and the connecting frame 32. The positioning fixture 4 can rotate relative to the connecting frame 32, and in a non-working state, the positioning fixture 4 can be folded to be vertically placed and positioned on one side of the welding mechanical arm 3, so that space is saved. And can lock fixedly through locking mechanism 5 in working position and non-working position, guarantee the stability of connection.

Specifically, the shifting piece 52 can be clamped into any tooth slot to realize locking, and the working position and the non-working position are only two points. Of course, the working position and the non-working position can be adjusted according to actual requirements. In this embodiment, the working position and the non-working position are determined according to actual requirements, the working position is a position where the fixture performs positioning and clamping on the workpiece to be welded, and the non-working position is a storage folding position.

In an embodiment, the welding robot 100 further includes a connection plate, which is disposed between the booster cart 1 and the mobile platform 2; the two sides of the connecting plate are respectively provided with a first sliding block 62 and a second sliding block 63; the power-assisted cart 1 is provided with a first sliding rail 64, and the first sliding block 62 is in sliding connection with the first sliding rail 64 along a first direction; the moving platform 2 is provided with a second sliding rail 65, and the second sliding block 63 is slidably connected with the second sliding rail 65 along a second direction. The first slider 62 and the first slide rail 64 constitute an X-direction linear guide, and the second slider 63 and the second slide rail 65 constitute a Y-direction linear guide, whereby the movable platform 2 can slide in the front-rear direction and the left-right direction with respect to the booster cart 1.

Based on the above embodiment, two first limiting blocking pieces 66 are arranged on the power-assisted cart 1 at intervals along the first direction, and the first limiting blocking pieces 66 are used for limiting and blocking the connecting plate so as to limit the travel of the mobile platform 2 along the first direction; the second limiting baffle 67 is connected to the moving platform 2, the stop block 68 is arranged on the power-assisted cart 1, and the second limiting baffle 67 is limited between the stop block 68 and the connecting plate to limit the travel of the moving platform 2 along the second direction. By providing the first limit stopper 66 and the second limit stopper 67 and the stopper 68, the travel of the moving platform 2 in the front-rear direction and the left-right direction is restricted, and the slide blocks (the first slide block 62 and the second slide block 63) and the slide rails (the first slide rail 64 and the second slide rail 65) are prevented from being separated.

In an embodiment, referring to fig. 3 to 5 in combination, the positioning jig 4 includes a jig main body 41, a first positioning mechanism 42 and a second positioning mechanism 43, where the jig main body 41 is rotatably connected with the connecting frame 32; the first positioning mechanism 42 comprises a first positioning piece 421 and a second positioning piece 422 which are oppositely arranged along a third direction, the first positioning piece 421 is fixedly connected with the clamp main body 41, the second positioning piece 422 is slidably connected with the clamp main body 41, and the second positioning piece 422 can slide along the first direction to clamp a workpiece to be welded or loosen the workpiece to be welded in a matched manner with the first positioning piece 421; the second positioning mechanism 43 comprises a third positioning member 431 and a fourth positioning member 432 which are arranged at intervals along the fourth direction, the third positioning member 431 is fixedly connected with the clamp main body 41, the fourth positioning member 432 is rotationally connected with the clamp main body 41, and the fourth positioning member 432 rotates to clamp a workpiece to be welded or loosen the workpiece to be welded in cooperation with the third positioning member 431; wherein the third direction and the fourth direction are mutually perpendicular.

The first positioning piece 421 and the second positioning piece 422 are distributed along the left-right direction, and the second positioning piece 422 can move leftwards to be matched with the first positioning piece 421 to clamp a workpiece to be welded; the third positioning member 431 and the fourth positioning member 432 are distributed along the front-rear direction, and the fourth positioning member 432 can be matched with the third positioning member 431 to clamp the workpiece to be welded in a rotating manner, so that the workpiece to be welded is completely positioned.

In this embodiment, the fixture and the external welding robot arm 3 are mounted on the same standard, that is, the fixture and the welding robot arm 3 form a whole, and when the fixture is moved to position the product, the welding robot arm 3 also moves along with the fixture, so that the relative positions of the robot arm and the additional plate to be welded are ensured to be effective. After the workpieces to be welded are fixed through the clamp, the welding mechanical arm 3 automatically searches for positions before the welding work starts, the head of the welding gun 31 moves to touch the marked points on the surfaces of the multiple workpieces to be welded, after the spatial position coordinate information of each point is obtained, the track of the set welding line is obtained through calculation of a robot, and then the welding gun 31 is controlled by the mechanical arm of the robot to perform walking welding.

In this embodiment, when the first positioning mechanism 42 and the second positioning mechanism 43 perform positioning, the second positioning member 422 and the fourth positioning member 432 can push the workpiece to be welded to perform a certain range of movement, that is, the first/second positioning mechanism 43 can perform alignment during the movement process, so as to reduce the requirement on the position accuracy of the workpiece to be welded before positioning; after the workpiece to be welded is clamped by the first positioning mechanism 42 and the second positioning mechanism 43, the position relationship between the workpiece to be welded and the clamp has high consistency, so that the welding mechanical arm 3 is convenient for carrying out subsequent welding work. Namely, in the embodiment, the first positioning mechanism 42 and the second positioning mechanism 43 are used for completely positioning the workpiece to be welded, so that the precision requirement before positioning is reduced, the positioning structure is simplified, and the cost is reduced without being matched with a vision system.

Optionally, the fourth positioning member 432 includes a rotating shaft 4321 and an eccentric wheel 4322, the eccentric wheel 4322 is sleeved at one end of the rotating shaft 4321, and the eccentric wheel 4322 cooperates with the third positioning member 431 to clamp the workpiece to be welded. That is, the rotatable eccentric 4322 is adopted in the front-rear direction, and by rotating the eccentric 4322, the rotation center point of the eccentric 4322 can be changed to the diameter of the eccentric 4322 on the side close to the workpiece to be welded.

Optionally, the clamp body 41 is provided with a locking seat 411, and the locking seat 411 is provided with a clamping groove 4111; the fourth positioning member 432 further includes a locking lever 4323, where the locking lever 4323 is rotatably connected to the other end of the rotating shaft 4321, and the locking lever 4323 can rotate relative to the rotating shaft 4321 to be clamped into the clamping groove 4111. The eccentric wheel 4322 has a maximum diameter point, and in general, the maximum diameter point is selected as a point for clamping the workpiece to be welded in cooperation with the third positioning member 431, and when the rotating shaft 4321 rotates until the maximum diameter point of the eccentric wheel 4322 abuts against the workpiece to be welded, the locking rod 4323 is rotated to clamp the eccentric wheel 4322 into the clamping groove 4111, so that the eccentric wheel 4322 is prevented from rotating under pressure, and the reliability of positioning and clamping is ensured.

Also, the locking lever 4323 may be used for a worker to hold, and the worker may rotate the rotation shaft 4321 by operating the locking lever 4323.

In other embodiments, the shaft 4321 may be driven by pushing the connecting rod with a cylinder.

Optionally, the second positioning member 422 includes a sliding table 4221, a link assembly 4222, and a positioning block 4223; the sliding table 4221 is slidably connected with the clamp body 41, one end of the connecting rod assembly 4222 is hinged with the sliding table 4221, the other end of the connecting rod assembly 4222 is hinged with the clamp body 41, and the connecting rod assembly 4222 is used for driving the sliding table 4221 to move. I.e. the distance between the second positioning member 422 and the first positioning member 421 is adjusted in a sliding manner in the left-right direction so as to clamp and lock the workpiece to be welded.

The connecting rod assembly 4222 generally has a dead center, and the point at which the second positioning member 422 is cooperatively clamped with the first positioning member 421 corresponds to the dead center position of the connecting rod assembly 4222. So that the second positioning member 422 and the first positioning member 421 can be automatically locked when being matched to clamp the workpiece to be welded.

Based on the above embodiment, the specific structure and connection relationship of the link mechanism are as follows: the clamp body 41 is provided with a first hinging seat 412, and the sliding table 4221 is provided with a second hinging seat 42211; the link assembly 4222 comprises an operation lever 42221 and a first link 42222, the operation lever 42221 comprises an operation end and two connection ends, one connection end is hinged with the first hinge base 412, the other connection end is hinged with the first link 42222, and one end of the first link 42222 away from the operation lever 42221 is hinged with the second hinge base 42211. The connecting end of the operation rod 42221 hinged to the first hinge seat 412 is a first connecting end, the connecting end connected to the first connecting rod 42222 is a second connecting end, the first connecting end and the operation end are linearly extended to form a main body of the operation rod 42221, the second connecting end forms a protruding structure along a direction perpendicular to the main body, and therefore when a connecting line between the first connecting end and the second connecting end is consistent with a moving direction (i.e., a left-right direction) of the sliding block, the connecting rod assembly 4222 is in a dead point position.

In this embodiment, the operation end of the operation lever 42221 is used for the operator to hold.

In an example of the above embodiment, the slide table 4221 is slidably connected to the clamp body 41 via the guide rail slider structure 44. The moving direction of the sliding table 4221 is guided by the guide rail sliding block structure 44, so that the moving smoothness of the sliding table 4221 is ensured. And reduces wear between the slide table 4221 and the jig main body 41.

The number of the guide rail slide block structures 44 is two, and the two guide rail slide block structures 44 are respectively arranged on two sides of the connecting rod assembly 4222 along the front-back direction, so that the stress uniformity is ensured.

In one embodiment, the locking mechanism 5 includes a ratchet 51 and a pulling piece 52, the ratchet 51 is fixedly connected with the connecting frame 32, the pulling piece 52 is rotatably connected with the clamp body 41, and an end portion of the pulling piece 52 can be clamped into a tooth slot of the ratchet 51 to lock the clamp body 41 and the connecting frame 32. The pulling sheet 52 can be clamped into any tooth slot to realize locking, and the working position and the non-working position are only two points. Of course, the working position and the non-working position can be adjusted according to actual requirements.

In an embodiment, the portions of the first positioning member 421, the second positioning member 422, the third positioning member 431, and the fourth positioning member 432 that are in contact with the workpieces to be welded are each provided with a flexible block 451. Rigid contact between the positioning members (the first positioning member 421, the second positioning member 422, the third positioning member 431 and the fourth positioning member 432) and the workpiece to be welded is avoided, and deformation and scratch are caused to the workpiece to be welded. Of course, the eccentric 4322 may be made of a flexible material.

The number of the first positioning pieces 421 is two, and the two first positioning pieces 421 are arranged at intervals along the front-rear direction; the number of the second positioning members 422 is also two, and the two second positioning members 422 are arranged at intervals along the front-rear direction. Thereby avoiding deflection of the workpiece to be welded caused by the fact that the clamping forces applied by the first positioning member 421 and the second positioning member 422 to the workpiece to be welded are not in the same straight line. Of course, the number of the first positioning members 421 and the second positioning members 422 may be one, or even more, which is not limited in the embodiment of the present disclosure.

In one embodiment, the clamp body 41 is disposed obliquely. I.e. the clamp has a certain inclination angle in the horizontal direction, so that the clamp body 41 can be closely attached to the inclined surface of the workpiece to be welded after being rotated to the working position.

In other embodiments, the shape of the bottom surface of the clamp body 41 matches the shape of the workpiece to be welded. Or the bottom of the clamp body 41 is provided with a plurality of positioning pins, and only the positioning pins are contacted with the top surface of the workpiece to be welded.

In one embodiment, the clamp further includes a handle 452, the handle 452 being coupled to the clamp body 41. The operator can grasp the handle 452 to operate when turning the clamp body 41.

The clamp body 41 is L-shaped as a whole, the clamp body 41 is composed of a frame and a mounting plate, the mounting plate provides a mounting base for the first positioning mechanism 42 and the second positioning mechanism 43, and the dial 52 is mounted on the frame. The weight of the clamp is reduced by using the frame and mounting plate structure.

In other embodiments, the clamp body 41 may be of unitary construction, with the weight of the clamp being reduced by providing a lightening hole therein.

In one embodiment, welding robot 100 includes a wire feeder 7, and wire feeder 7 is configured to feed welding wire to welding gun 31. The wire feeder 7 can load a wire coil, and continuously feed the wire to the welding gun 31, thereby reducing the wire changing frequency.

In one embodiment, the number of the positioning fixtures 4 is two, and the two positioning fixtures 4 are respectively arranged at two sides of the welding mechanical arm 3. When the workpieces to be welded are symmetrically arranged, the two symmetrical workpieces to be welded can be simultaneously positioned by utilizing the two positioning fixtures 4, so that the welding of the two workpieces to be welded is realized by one-time positioning, and the welding efficiency is improved.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (10)

1. A welding robot, the welding robot comprising:

A power-assisted cart;

The mobile platform is movably connected with the power-assisted cart, and can slide relative to the power-assisted cart along a first direction and a second direction, and the first direction and the second direction are vertically arranged;

The welding mechanical arm is arranged on the mobile platform, and a welding gun is arranged at the output end of the welding mechanical arm;

the positioning clamp is rotationally connected with the fixed end of the welding robot;

The locking mechanism is used for fixing the positioning clamp and the mobile platform.

2. The welding robot as recited in claim 1, wherein a fixed end of the welding robot arm is provided with a connecting frame, and the positioning fixture is rotatably connected with the connecting frame;

The locking mechanism comprises a ratchet wheel and a shifting piece, the ratchet wheel is fixedly connected with the connecting frame, the shifting piece is rotationally connected with the positioning clamp, and the end part of the shifting piece can be clamped into a tooth slot of the ratchet wheel to lock the positioning clamp and the connecting frame.

3. The welding robot of claim 2, further comprising a connection plate disposed between the booster cart and the mobile platform; the two sides of the connecting plate are respectively provided with a first sliding block and a second sliding block;

the power-assisted trolley is provided with a first sliding rail, and the first sliding block is in sliding connection with the first sliding rail along a first direction;

The mobile platform is provided with a second sliding rail, and the second sliding block is in sliding connection with the second sliding rail along a second direction.

4. The welding robot as recited in claim 3 wherein said booster cart is provided with two first limit stops spaced apart along a first direction, said first limit stops being adapted to limit travel of said mobile platform along the first direction by limiting stops to said web; and/or the number of the groups of groups,

The power-assisted trolley is characterized in that a second limiting baffle is connected to the moving platform, a stop block is arranged on the power-assisted trolley, and the second limiting baffle is limited between the stop block and the connecting plate to limit the travel of the moving platform along the second direction.

5. The welding robot of any one of claims 2 to 4, wherein the positioning fixture comprises:

The clamp body is rotationally connected with the connecting frame;

The first positioning mechanism comprises a first positioning piece and a second positioning piece which are oppositely arranged along a third direction, the first positioning piece is fixedly connected with the clamp main body, the second positioning piece is slidably connected with the clamp main body, and the second positioning piece can slide along the first direction to clamp a workpiece to be welded or loosen the workpiece to be welded in a matched manner with the first positioning piece;

The second positioning mechanism comprises a third positioning piece and a fourth positioning piece which are arranged at intervals along a fourth direction, the third positioning piece is fixedly connected with the clamp main body, the fourth positioning piece is rotationally connected with the clamp main body, and the fourth positioning piece rotates to clamp a workpiece to be welded or loosen the workpiece to be welded in cooperation with the third positioning piece;

wherein the third direction and the fourth direction are perpendicular to each other.

6. The welding robot as recited in claim 5, wherein said fourth positioning member includes a shaft and an eccentric, said eccentric is disposed on one end of said shaft, and said eccentric cooperates with said third positioning member to clamp a workpiece to be welded.

7. The welding robot as recited in claim 6, wherein a locking seat is provided on the jig main body, and a clamping groove is provided on the locking seat;

The fourth locating piece further comprises a locking rod, the locking rod is rotationally connected with the other end of the rotating shaft, and the locking rod can rotate relative to the rotating shaft to be clamped into the clamping groove.

8. The welding robot as recited in claim 5, wherein said second positioning member includes a slide table, a link assembly, and a positioning block; the sliding table is in sliding connection with the clamp main body, one end of the connecting rod assembly is hinged with the sliding table, the other end of the connecting rod assembly is hinged with the clamp main body, and the connecting rod assembly is used for driving the sliding table to move.

9. The welding robot as recited in any one of claims 1 to 4, wherein said welding robot further comprises a wire feeder for feeding welding wire to said welding gun.

10. The welding robot as recited in any one of claims 1 to 4, wherein the number of said positioning jigs is two, and two of said positioning jigs are provided separately on both sides of said welding robot arm.