CN215658792U - Positioning device for welding of fan feet - Google Patents

Abstract

The utility model discloses a positioning device for welding a fan leg, which comprises a portal frame, a first positioning device and a second positioning device, wherein the portal frame is provided with a first height adjusting device; the first cross beam is arranged on the first height adjusting device along the left-right direction, and the first height adjusting device can adjust the up-down position of the first cross beam; first sliding member, it slides and sets up on first crossbeam, is connected with first retaining member between first sliding member and the first crossbeam, and at least two first sliding members are arranged along the extension length of first crossbeam, reduce staff intensity of labour, improve production efficiency, improve welding process stability, and simultaneously, guaranteed the plane degree of two machine legs installations, also guaranteed technological requirements such as the position accuracy degree of barrel lateral wall and machine leg position, improvement machine leg welding quality.

Description

Positioning device for welding of fan feet

Technical Field

The utility model relates to the field of welding and positioning of fan casings, in particular to a positioning device for welding fan feet.

Background

Among the axial fan, often can be equipped with the undercarriage that is used for supporting the stack shell on the lateral wall of its tube-shape casing, and the undercarriage has face of placing and face of weld, and the face of weld welds on the barrel, places the plane that the face is undercarriage and ground contact to stability and depth of parallelism when guaranteeing that the fan is put and is used. At present, axial fan's machine foot welding process adopts manual mode through the staff, carry out the setting-out mark on the stack shell of fan, it is perpendicular to utilize the square to revise the machine foot again, then use the tape measure to carry out size positioning, then, correct two machines sole face roughness through the naked eye after, weld between machine foot and the stack shell, it is thus visible, the mode process of location is loaded down with trivial details before the above welding, artifical intensity of labour is big, consuming time is long, at the bottom of the production efficiency, and, in welding process, misplace easily and then take place machining error between machine foot and the stack shell, rework rate and welding are not high in qualification rate, have very big drawback.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a positioning device for welding a fan leg, which is used for solving one or more technical problems in the prior art and at least provides a beneficial choice or creation condition.

The solution of the utility model for solving the technical problem is as follows: a positioning device for welding of a fan foot comprises: the portal frame is provided with a first height adjusting device; the first cross beam is arranged on the first height adjusting device along the left-right direction, and the first height adjusting device can adjust the up-down position of the first cross beam; the first sliding member is arranged on the first cross beam in a sliding mode, and a first locking piece is connected between the first sliding member and the first cross beam.

The technical scheme at least has the following beneficial effects: after the worker puts the fan barrel, the fan barrel is provided with a bottom opening and a top opening, then a machine foot to be welded is arranged on the first sliding component, the placing surface of the machine foot is placed along the vertical direction all the time, then the vertical position of the first cross beam can be adjusted through the first height adjusting device, so that the height of the machine foot is adjusted to a target position, the worker pushes the fan barrel to the machine foot, the first sliding component can drive the machine foot to move, the welding surface of the machine foot is conveniently and completely attached to the side wall of the barrel, after the position of the machine foot is determined, the first sliding component and the first cross beam are relatively positioned through the first locking component, finally, the machine foot is welded, after the welding is finished, the next machine foot can be welded by repeating the processes, because the machine foot extends along the left-right direction, and the placing surface of the machine foot is always along the vertical direction, meanwhile, the first cross beam is always subjected to position adjustment in the up-down direction, the perpendicularity of the machine legs is guaranteed, the step of using tools to correct positions is reduced, the labor intensity of workers is reduced, the production efficiency is improved, meanwhile, the machine legs are positioned in the welding process, the stability of the welding process is improved, one hand of the worker does not need to hold the machine legs, the other hand of the worker does not need to weld, the dislocation of the machine legs is reduced, the flatness of installation of a plurality of machine legs on the same barrel is guaranteed, the technological requirements of position accuracy and the like of the barrel side wall and the machine leg positions are also guaranteed, and the welding quality of the machine legs is improved.

As a further improvement of the technical scheme, the positioning device for welding the fan leg further comprises two sliding rails, wherein the two sliding rails are arranged on the portal frame along the vertical direction, and the left end and the right end of the first cross beam are respectively connected to the two sliding rails in a sliding manner. Because the left end and the right end of the first cross beam are respectively connected to the two slide rails in a sliding manner, when the first height adjusting device adjusts the upper position and the lower position of the first cross beam, the first cross beam always slides up and down along the portal frame through the slide rails, so that the shaking of the first cross beam is reduced, the stability of the first cross beam during position adjustment is improved, the first cross beam is ensured to horizontally move up or down, the first cross beam is prevented from being inclined, and the welding precision is improved.

As a further improvement of the above technical solution, the first cross beams are symmetrically arranged on the first height adjusting device. The shaking and inclining conditions of the first cross beam are reduced, and the stability of the first cross beam during position adjustment and welding of the machine leg is improved, so that the stress of the first height adjusting device is balanced, and the abrasion to the first height adjusting device is reduced.

As another improvement of the above technical scheme, a positioning device for welding a fan leg further comprises a second cross beam and a second sliding member, wherein the first height adjusting device is arranged at the top of the portal frame, the bottom of the portal frame is further provided with a second height adjusting device, the second cross beam is arranged on the second height adjusting device along the left-right direction, the second height adjusting device can adjust the upper and lower positions of the second cross beam relative to the portal frame, the second sliding member is slidably arranged on the second cross beam, and a second locking member is connected between the second sliding member and the second cross beam. Even be the fan barrel of different model sizes, designers often all tend to set up the undercarriage at the both sides opening part that is close to the barrel more, in order to improve the support stability, one treats that welded undercarriage establishes on first crossbeam, another treats that welded undercarriage establishes on the second crossbeam, position control about carrying out through first high adjusting device and second high adjusting device with two undercarriage respectively, and can weld the undercarriage on first crossbeam at the opening part that the barrel is close to the top, can weld the undercarriage on the second crossbeam at the opening part that the barrel is close to the bottom, in order to reduce the range of regulation, make things convenient for the staff to operate, and, the face of weld of two undercarriage is fixed a position simultaneously, improve positioning efficiency, produce position error when reducing the regulation, improve positioning accuracy.

As a further improvement of the above technical solution, a positioning device for welding a fan leg further includes a third cross beam and a third sliding member, the third cross beam is disposed on the first height adjusting device along the left-right direction, the third cross beam is disposed between the first cross beam and the second cross beam, the first height adjusting device can adjust the vertical position of the third cross beam, the third sliding member is slidably disposed on the third cross beam, and a third locking member is connected between the third sliding member and the third cross beam. Aiming at the fan cylinders with different models and sizes, the first cross beam and the second cross beam can be adopted for positioning the machine legs, or the first cross beam and the third cross beam are adopted for positioning the machine legs, or the first cross beam, the second cross beam and the third cross beam are adopted for positioning a plurality of machine legs simultaneously, so that the adjusting range is reduced, the fan cylinder positioning device is suitable for fans with various models, the positioning efficiency is high, the working procedure is simple and direct, the operation is simple, and the labor intensity is reduced.

As another improvement of the above technical solution, the second height adjusting device is an adjusting bolt, the adjusting bolt is arranged along the up-down direction, and the second beam is in threaded connection with the adjusting bolt. Even be the fan barrel of different model sizes, the designer often all tends to set up the undercarriage in the both sides opening part that is close to the barrel more, and install the undercarriage on the second crossbeam then can be welded and be close to fan barrel bottom open-ended position on, therefore, adjusting bolt sets up the bottom at the portal frame, the second crossbeam is threaded connection then on adjusting bolt, the staff is through rotatory adjusting bolt, make the second crossbeam carry out the fine setting of upper and lower position along adjusting bolt, the undercarriage counterpoint that conveniently is located the downside, the position control precision is high.

As another improvement of the above technical solution, the first height adjusting device is a ball screw, a fourth locking member is disposed on the ball screw, and the ball screw and the gantry can be relatively positioned through the fourth locking member. The ball screw comprises a screw rod and a ball nut, the ball nut can slide up and down along with the rotation of the screw rod, the screw rod is arranged on the portal frame, the first cross beam is arranged on the ball nut, the screw rod is rotated by an operator, the first cross beam translates up and down along with the ball nut along the screw rod, the first cross beam is moved to a target position, the screw rod and the portal frame are relatively positioned through the fourth locking piece, so that the height of the first cross beam is determined, the position adjusting precision is high, and the stability is high.

As a further improvement of the above technical solution, the ball screw is synchronously provided with an adjusting handle, and the setting direction of the adjusting handle is not coincident with the rotation axis of the ball screw. Adjustment handle and ball screw relative positioning, staff for the screw rod is rotatory through rotating adjustment handle, and then drives the ball nut and carry out translation from top to bottom along the screw rod, convenient regulation.

As another improvement of the above technical solution, the first sliding member is a positioning pin, and at least two positioning pins are arranged along the extending direction of the first cross member. Staff's accessible inserts the mounting hole department that the undercarriage corresponds with two horizontal arrangement locating pins to realize the installation of undercarriage, swift dismouting, it is with low costs.

As another improvement of the above technical scheme, the positioning device for welding the fan leg further comprises a workbench, wherein the portal frame is arranged on the workbench, and the top surface of the workbench faces upwards. The portal frame is established on the workstation, and first height adjusting device extends along upper and lower direction, improves the installation stability of portal frame, simultaneously, because the top surface orientation of workstation is last, when the undercarriage welding, the fan barrel then is placed and is welded on the top surface of workstation, guarantees the plane degree of fan barrel and undercarriage.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the utility model, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

FIG. 1 is a schematic view of a product after welding of a blower barrel and a blower foot in the related art;

FIG. 2 is a front view of a positioning device for welding a blower leg according to an embodiment of the present invention;

FIG. 3 is a side view of a positioning device for welding a blower leg according to an embodiment of the present invention;

fig. 4 is a top view of a positioning device for welding a fan leg according to an embodiment of the present invention.

In the drawings: 20-cylinder, 21-machine foot, 100-workbench, 110-portal frame, 120-ball screw, 122-fourth locking piece, 123-adjusting handle, 130-first beam, 131-first sliding member, 140-sliding rail, 150-second beam, 151-second sliding member, 160-third beam, 161-third sliding member, 170-adjusting bolt, 310-first locking piece, 320-second locking piece and 330-third locking piece.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection relations mentioned herein do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection accessories according to the specific implementation situation. The technical characteristics of the utility model can be combined interactively on the premise of not conflicting with each other.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

As shown in fig. 1, it can be known that the welding surface of the leg 21 is connected to the side wall of the barrel 20, and referring to fig. 2, 3 and 4, the positioning device for welding the fan leg 21 includes: a gantry 110 provided with a first height adjustment device; a first cross member 130 provided on the first height adjusting means in the left-right direction, the first height adjusting means being capable of adjusting the up-down position of the first cross member 130 on the first height adjusting means; first glide member 131 is slidably disposed on first beam 130, and first locking member 310 is connected between first glide member 131 and first beam 130. Specifically, the machine leg 21 to be welded is mounted on the first sliding member 131, the placing surface of the machine leg 21 is always placed in the vertical direction, then the vertical position of the first cross beam 130 can be adjusted by the first height adjusting device, so as to adjust the height of the machine leg 21 to the target position, and when the worker pushes the blower barrel 20 to the machine leg 21, the side wall of the barrel 20 abuts against the welding surface of the machine leg 21, because the first sliding member 131 can slide on the first cross beam 130, the first sliding member 131 can automatically drive the machine leg 21 to move to the welding position, so that the welding surface of the machine leg 21 is completely attached to the side wall of the barrel 20, after the position of the machine leg 21 is determined, the first sliding member 131 and the first cross beam 130 are relatively positioned by the first locking member 310, finally, the machine leg 21 is welded, after the welding is completed, the above process can be repeated to weld the next machine leg 21, because the machine legs 21 extend in the left-right direction, and the placing surfaces of the machine legs 21 are placed along the up-down direction all the time, meanwhile, the first cross beams 130 are subjected to position adjustment in the up-down direction all the time, the verticality of the machine legs 21 is ensured, the steps of using tools to correct positions are reduced, the labor intensity of workers is reduced, the production efficiency is improved, meanwhile, the machine legs 21 are positioned in the welding process, the stability of the welding process is improved, one hand of the workers does not need to hold the machine legs 21, the other hand of the workers carries out welding, the dislocation of the machine legs 21 is reduced, the flatness of the installation of a plurality of machine legs 21 on the same barrel body 20 is ensured, the technological requirements of the position accuracy and the like of the side wall of the barrel body 20 and the position of the machine legs 21 are also ensured, and the welding quality of the machine legs 21 is improved. It should be noted that, in this embodiment, the lateral wall of fan barrel 20 can be the arc, and the face of weld of undercarriage 21 is the arcwall face with fan barrel 20 lateral wall assorted, therefore, after installing undercarriage 21, the staff pushes fan barrel 20 to undercarriage 21 direction, the undercarriage 21 face of weld offsets the back with barrel 20 lateral wall, undercarriage 21 is through first sliding component 131 for the face of weld of undercarriage 21 automatic coordination in the lateral wall of barrel 20, in order to realize automatic alignment, undercarriage 21 can be from the center of looking for, and is convenient and fast, reduce staff intensity of labour, improve the counterpoint precision. In addition, the lateral wall of fan barrel 20 also can be the rectangle, and the plane of undercarriage 21 face of weld and barrel 20 lateral wall assorted, and the staff pushes fan barrel 20 to undercarriage 21 direction, and first component 131 that slides can drive undercarriage 21 and slide automatically, through the clearance of observing between undercarriage 21 face of weld and the barrel 20 lateral wall, and the staff can adjust the position of barrel 20 by oneself, makes things convenient for the face of weld and the laminating completely of barrel 20 lateral wall. After one leg 21 is welded, the above process may be repeated to align and weld the next leg 21 to the same barrel 20.

Further, in order to prevent the first cross beam 130 from being inclined, improve the stability of the first cross beam 130 during position adjustment, and improve the welding precision, in this embodiment, the positioning device for welding the fan leg 21 further includes a slide rail 140, the two slide rails 140 are disposed on the portal frame 110 along the up-down direction, and the left and right ends of the first cross beam 130 are respectively slidably connected to the two slide rails 140. In fact, the end of the first cross beam 130 can be matched with the sliding rail 140 through the sliding table, so as to realize the sliding connection with the sliding rail 140.

In addition, in some embodiments, the first cross beam 130 may be symmetrically disposed on the first height adjusting device, so as to reduce the shaking and tilting of the first cross beam 130, improve the stability of the first cross beam 130 during position adjustment and during welding of the machine leg 21, balance the stress on the first height adjusting device, and reduce the wear on the first height adjusting device.

In some embodiments, the positioning device for welding the fan leg 21 further includes a second beam 150 and a second sliding member 151, the first height adjusting device is disposed at the top of the gantry 110, the second height adjusting device is further disposed at the bottom of the gantry 110, the second beam 150 is disposed on the second height adjusting device along the left-right direction, the second height adjusting device can adjust the up-down position of the second beam 150 relative to the gantry 110, the second sliding member 151 is slidably disposed on the second beam 150, and a second locking member 320 is connected between the second sliding member 151 and the second beam 150. The welding machine has the advantages that the adjusting range can be reduced, the operation of workers is facilitated, the welding surfaces of the two machine legs 21 are positioned at the same time, the welding surfaces of the machine legs 21 on the side wall of the same barrel 20 are guaranteed to be positioned on the same plane, the positioning efficiency is improved, the adjusting error is reduced, the positioning precision is improved, and the placing stability of the barrel 20 is improved. In addition, second locking member 320 can enable relative positioning between second sliding member 151 and second beam 150, and prevent foot 21 mounted on second sliding member 151 from sliding left and right. In this embodiment, two ends of the second beam 150 are respectively slidably connected to the two slide rails 140, so that the mounting stability of the second beam 150 is improved, and the welding precision of the machine leg 21 is improved.

Meanwhile, in some embodiments, a third cross beam 160 and a third sliding member 161 may be further included, the third cross beam 160 is disposed on the first height adjusting device along the left-right direction, the third cross beam 160 is located between the first cross beam 130 and the second cross beam 150, the first height adjusting device may adjust the up-down position of the third cross beam 160 on the first height adjusting device, the third sliding member 161 is slidably disposed on the third cross beam 160, and a third locking member 330 is connected between the third sliding member 161 and the third cross beam 160. The adjustment range is reduced, the fan is suitable for fans of various models, the positioning efficiency is high, in addition, the third locking piece 330 can enable the third sliding member 161 and the third beam 160 to be positioned relatively, and the machine leg 21 arranged on the third sliding member 161 is prevented from sliding left and right. In this embodiment, two ends of the third beam 160 are respectively slidably connected to the two slide rails 140, so as to improve the mounting stability of the third beam 160 and improve the welding precision of the machine leg 21. Furthermore, the third cross member 160 may be symmetrically disposed on the first height adjusting means, thereby improving stability when the position of the third cross member 160 is adjusted.

Furthermore, in some embodiments, the second height adjusting means is an adjusting bolt 170, the adjusting bolt 170 is disposed in an up-down direction, and the second cross member 150 is screwed to the adjusting bolt 170. Even fan barrel 20 of different models size, the designer often all tends to set up the undercarriage 21 more near the both sides opening part of barrel 20, and the undercarriage 21 of installing on second crossbeam 150 then can be welded and be close to on the open-ended position in fan barrel 20 bottom, consequently, adjusting bolt 170 sets up the bottom at portal frame 110, second crossbeam 150 then threaded connection is on adjusting bolt 170, the staff is through rotating adjusting bolt 170, make second crossbeam 150 carry out the fine setting of upper and lower position along adjusting bolt 170, conveniently be located the undercarriage 21 counterpoint of downside, position control precision is high.

In order to improve the adjustment precision of the position of the machine leg 21, in some embodiments, the first height adjusting device is a ball screw 120, a fourth locking member 122 is disposed on the ball screw 120, and the ball screw 120 and the gantry 110 can be relatively positioned by the fourth locking member 122. The ball screw 120 comprises a screw and a ball nut, the worker rotates the screw, the first beam 130 translates up and down along the screw along with the ball nut, and when the first beam 130 moves to the target position, the screw and the portal frame 110 are relatively positioned through the fourth locking piece 122, so that the height of the first beam 130 is determined, the position is adjusted with high precision, and the stability is high. In fact, the first height adjusting device or the second height adjusting device can be in a screw rod, gear and rack meshed structure and the like, the precision is high, the adjustment is convenient, the clamping spring can be clamped, or the clamping spring can be in a threaded connection structure on the portal frame 110 and the like, the structure is simple, and the cost is low.

In the embodiment, the ball screw 120 is synchronously provided with the adjusting handle 123, and the setting direction of the adjusting handle 123 is not coincident with the rotation axis of the ball screw 120. The adjusting handle 123 and the ball screw 120 are positioned relatively, and a worker rotates the adjusting handle 123 to enable the screw to rotate, so that the ball nut is driven to move up and down along the screw. In fact, by rotating the ball screw 120, the up-down positions of the first beam 130 and the second beam 150 can be adjusted at the same time, so that the interval between the first beam 130 and the third beam 160 is always kept the same.

In addition, in the present embodiment, the first sliding member 131 is a positioning pin, and at least two positioning pins are arranged along the extending direction of the first beam 130. Staff's accessible inserts the mounting hole department that the undercarriage 21 corresponds with two or more horizontally arranged's locating pin to realize the installation of undercarriage 21, swift dismouting, it is with low costs. In fact, second sliding member 151 and third sliding member 161 may be installed on machine leg 21 in the form of positioning pins, and furthermore, first sliding member 131, second sliding member 151 and third sliding member 161 may also be in the structure of a latch or a hook, as long as stable installation on machine leg 21 is achieved.

Moreover, the positioning device for welding the fan leg 21 further comprises a workbench 100, wherein the portal frame 110 is arranged on the workbench 100, and the top surface of the workbench 100 faces upwards. Portal frame 110 is established on workstation 100, and first height adjusting device is adjustable first crossbeam 130 improves portal frame 110's installation stability, simultaneously, because the top surface orientation of workstation 100 is last, fan barrel 20 can place on the top surface of workstation 100, guarantees the plane degree of fan barrel 20 and machine foot 21. The workbench 100 can be provided with a moving mechanism or a turntable, and after the blower barrel 20 is placed on the workbench 100, the barrel 20 can be moved and turned conveniently, and position conversion is facilitated.

While the preferred embodiments of the present invention have been described in detail, it should be understood that the utility model is not limited to those precise embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the utility model as defined in the appended claims.

Claims (10)

1. The utility model provides a fan undercarriage welded positioner which characterized in that: the method comprises the following steps:

a gantry (110) provided with a first height adjustment device;

a first cross member (130) provided on the first height adjusting means in a left-right direction, the first height adjusting means being capable of adjusting an up-down position of the first cross member (130);

the first sliding member (131) is arranged on the first cross beam (130) in a sliding mode, and a first locking piece (310) is connected between the first sliding member (131) and the first cross beam (130).

2. The positioning device for welding the machine leg of the fan according to claim 1, characterized in that: the gantry crane further comprises slide rails (140), the two slide rails (140) are arranged on the gantry frame (110) in the vertical direction, and the left end and the right end of the first cross beam (130) are respectively connected to the two slide rails (140) in a sliding mode.

3. The positioning device for welding the machine leg of the fan according to claim 1 or 2, wherein: the first cross beam (130) is symmetrically arranged on the first height adjusting device.

4. The positioning device for welding the machine leg of the fan according to claim 1 or 2, wherein: still include second crossbeam (150) and second slide member (151), first height adjusting device sets up the top of portal frame (110), the bottom of portal frame (110) still is equipped with second height adjusting device, second crossbeam (150) set up along left right direction on the second height adjusting device, second height adjusting device is adjustable second crossbeam (150) for the upper and lower position of portal frame (110), second slide member (151) slide and set up on second crossbeam (150), second slide member (151) with be connected with second retaining member (320) between second crossbeam (150).

5. The positioning device for welding the machine leg of the fan according to claim 4, wherein: still include third crossbeam (160) and third glide component (161), third crossbeam (160) set up along left right direction on the first height adjustment device, third crossbeam (160) are located first crossbeam (130) with between second crossbeam (150), first height adjustment device is adjustable the upper and lower position of third crossbeam (160), third glide component (161) slide and set up on third crossbeam (160), third glide component (161) with be connected with third retaining member (330) between third crossbeam (160).

6. The positioning device for welding the machine leg of the fan according to claim 4, wherein: the second height adjusting device is an adjusting bolt (170), the adjusting bolt (170) is arranged along the vertical direction, and the second cross beam (150) is in threaded connection with the adjusting bolt (170).

7. The positioning device for welding the machine leg of the fan according to claim 1, characterized in that: the first height adjusting device is a ball screw (120), a fourth locking piece (122) is arranged on the ball screw (120), and the ball screw (120) and the portal frame (110) can be relatively positioned through the fourth locking piece (122).

8. The positioning device for welding the machine leg of the fan according to claim 7, wherein: the adjusting handle (123) is synchronously arranged on the ball screw (120), and the setting direction of the adjusting handle (123) is not superposed with the rotation axis of the ball screw (120).

9. The positioning device for welding the machine leg of the fan according to claim 1, characterized in that: the first sliding member (131) is a positioning pin, and at least two positioning pins are arranged along the extending direction of the first cross beam (130).

10. The positioning device for welding the machine leg of the fan according to claim 1, characterized in that: still include workstation (100), portal frame (110) set up on workstation (100), the top surface orientation of workstation (100) is for last.

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