CN219254701U - Impeller dress lid positioning mechanism - Google Patents

Abstract

The application relates to an impeller dress lid positioning mechanism relates to positioning mechanism's field, including conveying subassembly, positioning seat and the extrusion subassembly that from bottom to top connects gradually, the constant head tank that is used for with the blade looks block in the impeller main part has been seted up to positioning seat up end to impeller main part and positioning seat up end, and impeller main part deviates from positioning seat one end and has placed the impeller lid, the positioning seat is connected with conveying subassembly, the extrusion subassembly is connected with conveying subassembly, conveying subassembly is used for conveying the positioning seat under the extrusion subassembly, the extrusion subassembly is used for vertical downwardly pressing impeller lid until impeller lid and impeller main part lid are closed. According to the impeller, the impeller main body is placed on the upper end face of the positioning seat, the blades on the impeller main body are inserted into the positioning grooves, the positioning grooves limit the blades, the probability that the blades deform due to extrusion is reduced, the situation that the blades of the fan impeller deform due to extrusion is avoided as much as possible, and the yield of the impeller fan is improved.

Description

Impeller dress lid positioning mechanism

Technical Field

The application relates to the field of positioning mechanisms, in particular to an impeller cover-mounting positioning mechanism.

Background

The impeller is not only a wheel disc provided with movable vanes, but also a generic name of the wheel disc and the movable vanes arranged on the wheel disc, and is widely applied to the fields of water pumps, hydroelectric generators, automobiles and the like.

The main mode of producing the impeller in the factory at present is to manufacture the impeller main body and the impeller cover which are composed of impeller columns and blades respectively, then cover the impeller main body and the impeller cover, and the mode of covering the impeller main body and the impeller cover is as follows: firstly, placing the impeller cover into an annular positioning groove on the positioning piece, then stacking the impeller main body on the impeller cover, enabling one end face of the impeller main body, which is provided with blades, to be abutted against the impeller cover, and then extruding the impeller main body along the direction that the impeller main body is close to the impeller cover through an extrusion piece until the impeller cover is covered on the impeller main body.

When the impeller main body of the fan impeller is covered with the impeller cover, as the blades of the fan impeller are fixedly connected to the side walls of the impeller column, one end face of the impeller column is positioned between the two side walls perpendicular to the axial direction of the impeller column on the blades, and the other end face of the impeller column is covered with the impeller cover, when the extrusion piece extrudes the end face of the impeller column, deviating from the impeller cover of the cover hinge, the extrusion piece easily extrudes the blades of the impeller, so that the blades cannot be deformed, and the yield of the impeller is reduced.

In the related art described above, the inventors considered that there was a defect that the yield of the fan impeller was lowered by the deformation of the blades of the fan impeller due to the extrusion.

Disclosure of Invention

In order to avoid deformation caused by extrusion of blades of a fan impeller as much as possible, thereby reducing the yield of the fan impeller.

The application provides an impeller dress covers positioning mechanism adopts following technical scheme: including conveying subassembly, positioning seat and the extrusion subassembly that from bottom to top connects gradually, the positioning seat up end has been placed impeller main part and the positioning seat up end has been seted up and has been used for the constant head tank with the blade looks block in the impeller main part, and impeller lid has been placed to impeller main part deviating from positioning seat one end, the positioning seat is connected with conveying subassembly, extrusion subassembly is connected with conveying subassembly, conveying subassembly is used for conveying the positioning seat under the extrusion subassembly, extrusion subassembly is used for vertical downwardly pressing impeller lid until impeller lid and impeller main part lid are closed.

Through adopting above-mentioned technical scheme, when impeller main part and impeller lid, at first put the impeller main part at the locating seat up end, thereby insert the constant head tank with the blade in the impeller main part, thereby carry out spacingly to the blade through the constant head tank, reduce the probability that the blade warp because of the extrusion, secondly put the impeller lid sign indicating number on the impeller main part, then convey the locating seat to extrusion assembly under through conveying assembly, the vertical downwardly extrusion impeller lid of extrusion assembly at last, the impeller lid removes along the direction that is close to the impeller main part, until impeller lid and impeller main part are covered completely, thereby avoid the blade of fan impeller to receive the extrusion as far as possible in whole and produce the circumstances of deformation, improve the yield of impeller fan.

Preferably, the conveying assembly comprises a support, a conveying belt and a mounting plate, the conveying belt is horizontally arranged on the support, the mounting plate is provided with a plurality of mounting plates, the plurality of mounting plates are arranged on the conveying belt at intervals along the conveying direction of the conveying belt, the conveying belt is provided with a connecting piece detachably connected with the mounting plate, and the positioning seat is arranged on the end face of the mounting plate, deviating from the conveying belt.

Through adopting above-mentioned technical scheme, at the conveyer belt with the in-process of positioning seat conveying to extrusion subassembly below, because positioning seat fixed connection is on the mounting panel, the positioning seat can not produce inertia because of the stop conveying of conveyer belt and continue to follow conveyer belt direction of delivery and remove to avoid the position of positioning seat on the conveyer belt to take place the condition emergence of skew, improved the stability of positioning seat on the conveyer belt.

Preferably, the extrusion assembly comprises a support, an air cylinder and a pressing block, wherein the support is detachably connected with the support, the air cylinder is mounted on the support and located above the conveyor belt, an output shaft of the air cylinder is vertically downwards distributed, and the pressing block is fixed on the end face, close to the conveyor belt, of the output shaft of the air cylinder.

Through adopting above-mentioned technical scheme, when the conveyer belt conveys impeller main part and impeller lid to the cylinder below, the output shaft of cylinder drives the briquetting along being close to the direction of impeller lid and removes, and the briquetting butt is in the impeller lid and along being close to the vertical downwardly extrusion of direction of impeller main part until the impeller lid closes on the impeller main part to realize the lid of impeller main part and impeller and close.

Preferably, the connecting piece is provided with two sets of, two sets of connecting piece is laid along the direction of delivery horizontal interval of perpendicular to conveyer belt, the connecting piece includes guide post, elastic component, spacing slider and stopper, the guide post is fixed in on the conveyer belt, offer on the mounting panel and supply guide post vertical slip male jack, the stopper is fixed in the conveyer belt just the stopper just the lateral wall level of guide post offered with spacing slider sliding connection's spacing spout, the elastic component is located in the spacing spout and one end is connected with the cell wall of spacing spout, the other end and the spacing slider of elastic component deviate from guide post one side and are connected fixedly, the spacing slider is just to the terminal surface of guide post for being close to the upward inclined pressing inclined plane of the direction of stopper, the up end of mounting panel with the lower terminal surface looks butt of spacing slider.

Through adopting above-mentioned technical scheme, when needs are installed the mounting panel on the conveyer belt, at first aim at the guide post with the guiding hole of mounting panel, then the vertical downwardly moving of mounting panel, the guiding hole is inserted in the guide post slip, thereby inject the mounting panel along the position of horizontal direction, the mounting panel is at the in-process of vertical downwardly moving, the lower terminal surface and of mounting panel, limit slider's the inclined plane butt of pressing and continue downwardly moving along with the mounting panel, through pressing the inclined plane, thereby promote limit slider and slide along the direction of keeping away from the guide post, the elastic component shrink, until the mounting panel moves to with the conveyer belt butt, the elastic component stretches and drives limit slider and slides along the direction that is close to the guide post, limit slider's lower terminal surface and mounting panel up end butt, thereby inject the mounting panel along the position of vertical direction, realize that the mounting panel is connected with the conveyer belt.

Preferably, the detection support is arranged on two sides of the support along the conveying direction of the conveying belt, and the detection support is provided with a second sensor for detecting the integral height of the impeller body after the impeller body and the impeller cover are covered.

Through adopting above-mentioned technical scheme, when the impeller passes through the second sensor, the second sensor can measure the whole height after impeller main part and the impeller lid cover and close and judge whether impeller main part and impeller lid are closed completely to delete and select impeller main part and the incomplete impeller of impeller lid and close, avoid causing bad effect's phenomenon to take place because of using impeller main part and the incomplete impeller of impeller lid to close as far as possible.

Preferably, the support is provided with an installation slide bar, the support is provided with a guide chute in sliding connection with the installation slide bar, the installation chute is arranged along the conveying direction of the driving belt, and the wall of the installation chute is provided with a bolt hole for the support to be in bolt connection with the support.

Through adopting above-mentioned technical scheme, when the support is installed on the support, through the direction spout, inject the position of support along vertical direction, simultaneously along the direction adjustment support of conveyer belt conveying on the support, finally through bolted connection support and support to inject the position of support along the horizontal direction, realize the detachable connection of support and support.

Preferably, a first sensor for detecting whether the impeller cover is placed on the impeller main body is installed on the support.

Through adopting above-mentioned technical scheme, when the positioning seat that has placed the impeller main part passes through first sensor, whether the impeller lid has been placed on the impeller main part to first sensor can detect, then with the cylinder that first sensor information system is connected with this judging whether need start the output shaft, make the output shaft take the briquetting to move down to avoid the phenomenon emergence of extrusion subassembly extrusion impeller main part as far as possible.

Preferably, the pressing block is made of elastic materials, and one end of the pressing block, which is away from the cylinder, is coaxially provided with a guide chute for coaxially sliding and inserting the impeller cover.

By adopting the technical scheme, the pressing block is made of elastic materials, so that the pressing block can buffer the pressure of the impeller cover in the extrusion process, and the impeller cover is protected; when the pressing block extrudes the impeller cover, the impeller cover is firstly inserted into the guide chute on the pressing block, so that the position of the impeller cover along the horizontal direction is limited, and the situation that the connection position of the impeller cover and the impeller main body is deviated is avoided as much as possible.

Preferably, the upper end surface of the positioning seat is coaxially provided with a positioning column, and the positioning column is coaxially inserted into the connecting shaft hole of the impeller main body in a sliding manner.

Through adopting above-mentioned technical scheme, when covering impeller lid and impeller main part, because the impeller main part is located the reference column through connecting shaft hole sliding sleeve to inject the position of impeller main part along the horizontal direction through the reference column, increased the stability of impeller main part on the positioning seat.

Preferably, an extension groove communicated with the positioning groove is formed in the position, opposite to the positioning groove, on the peripheral wall of the positioning seat.

Through adopting above-mentioned technical scheme, because the elongated slot communicates with the constant head tank, the impeller main part that various blade length are unequal can be placed to the positioning seat up end, and the blade that length is unequal all can insert in the constant head tank to increased the application range of positioning seat, improved the practicality of positioning seat.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the impeller main body and the impeller cover are covered, firstly, the impeller main body is placed on the upper end face of the positioning seat, the blades on the impeller main body are inserted into the positioning grooves, the blades are limited through the positioning grooves, the probability of deformation of the blades due to extrusion is reduced, secondly, the impeller cover is stacked on the end face, away from the positioning seat, of the impeller main body, then, the positioning seat is conveyed to the position right below the extrusion assembly through the conveying assembly, finally, the extrusion assembly vertically extrudes the impeller cover downwards, the impeller cover moves along the direction close to the impeller main body until the impeller cover is completely covered with the impeller main body, so that the situation that the blades of the fan impeller are extruded to deform is avoided as much as possible, and the yield of the impeller fan is improved;

2. because the extension groove is communicated with the positioning groove, the impeller main bodies with different lengths of the blades can be placed on the upper end face of the positioning seat, and the blades with different lengths can be inserted into the positioning groove, so that the application range of the positioning seat is increased, and the practicability of the positioning seat is improved.

Drawings

Fig. 1 is a schematic overall structure of an embodiment of the present application.

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

Fig. 3 is a schematic view of the structure of the pressing assembly in the embodiment of the present application.

Fig. 4 is a schematic structural diagram of the connection in the embodiment of the present application.

In the figure: 1. a transfer assembly; 11. a bracket; 111. installing a chute; 112. bolt holes; 12. a conveyor belt; 13. a mounting plate; 131. a guide hole; 2. a positioning seat; 21. A positioning groove; 22. an extension groove; 3. an extrusion assembly; 31. a support; 32. A cylinder; 33. briquetting; 331. a guide chute; 4. a connecting piece; 41. a limiting block; 411. limiting sliding grooves; 42. a guide post; 43. a limit sliding block; 44. an elastic member; 5. installing a sliding strip; 6. positioning columns; 7. a first sensor; 8. a second sensor; 9. an impeller main body; 91. a blade; 10. an impeller cover.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-4.

The embodiment of the application discloses an impeller dress lid positioning mechanism. Referring to fig. 1 and 2, an impeller capping and positioning mechanism comprises a conveying assembly 1, a positioning seat 2 and an extrusion assembly 3 which are sequentially connected from bottom to top.

The conveyor assembly 1 comprises a support 11 and a conveyor belt 12, the conveyor belt 12 being mounted horizontally on the support 11, the press assembly 3 being detachably mounted on the support 11 above the conveyor belt 12. The conveyor belt 12 is provided with a connecting piece 4, and the conveyor belt 12 is detachably connected with the mounting plate 13 through the connecting piece 4. The mounting plates 13 are provided in a plurality, and the plurality of mounting plates 13 are mounted on the conveyor belt 12 at intervals along the conveying direction of the conveyor belt 12. The mounting plate 13 is fixedly connected with positioning seat 2 on the terminal surface that deviates from conveyer belt 12, and impeller main part 9 has been placed to the up end of positioning seat 2, and impeller lid 10 has been placed to the terminal surface that impeller main part 9 deviates from positioning seat 2. The upper end surface of the positioning seat 2 is provided with a positioning groove 21 for being engaged with the blade 91 on the impeller main body 9. Meanwhile, the upper end face of the positioning seat 2 is coaxially provided with a positioning column 6, and the position of the impeller main body 9 along the horizontal direction is limited by the positioning column 6.

In the process of conveying the positioning seat 2 to the lower part of the extrusion assembly 3 by the conveyor belt 12, the impeller main body 9 is slidably sleeved on the positioning column 6 through the connecting shaft hole, and the blades 91 on the impeller main body 9 are inserted into the positioning grooves 21. The positioning groove 21 limits the vane 91, and the probability of deformation of the vane 91 due to extrusion is reduced. Next, the impeller cover 10 is stacked on the impeller main body 9, and then the positioning seat 2 is conveyed to the position right below the pressing assembly 3 by the conveying assembly 1. Since the positioning seat 2 is fixedly connected to the mounting plate 13, the positioning seat 2 does not move continuously in the conveying direction of the conveyor belt 12 due to inertia generated by stopping conveying of the conveyor belt 12. Finally, the extrusion assembly 3 vertically extrudes the impeller cover 10 downwards, the impeller cover 10 moves along the direction close to the impeller main body 9 until the impeller cover 10 is completely covered with the impeller main body 9, so that the situation that the blades 91 of the fan impeller are extruded to deform is avoided as much as possible, and the yield of the impeller fan is improved.

Meanwhile, the peripheral wall of the positioning seat 2 is also provided with an extension groove 22, and the extension groove 22 is communicated with the positioning groove 21, so that blades 91 with different lengths can be inserted into the positioning groove 21, and the application range of the positioning seat 2 is increased.

Referring to fig. 1 and 3, the pressing assembly 3 includes a holder 31, a cylinder 32, and a pressing block 33.

First, the lower end surface of the support 31 is provided with a mounting slide 5, the support 11 is provided with a guide chute 331 slidably connected with the mounting slide 5, and the mounting chute 111 is disposed along the conveying direction of the conveyor belt 12. As shown in fig. 2, bolt holes 112 for bolting the bracket 11 to the bracket 31 are formed in the wall of the installation chute 111, so as to adjust the relative positions of the bracket 31 and the bracket 11.

Referring next to fig. 1 and 3, the support 31 is mounted to the bracket 11 by bolts. The cylinder 32 is mounted on the support 31 and is located above the conveyor belt 12, the output shaft of the cylinder 32 is vertically arranged downwards, and the pressing block 33 is coaxially fixed on the end face of the output shaft of the cylinder 32, which is close to the conveyor belt 12.

When the conveyor belt 12 conveys the impeller main body 9 and the impeller cover 10 to the lower side of the air cylinder 32, the output shaft of the air cylinder 32 drives the pressing block 33 to move along the direction approaching the impeller cover 10, and the pressing block 33 is abutted against the impeller cover 10 and vertically and downwards pressed along the direction approaching the impeller main body 9.

In addition, the pressing piece 33 is an elastic material so as to buffer the pressing force of the pressing piece 33 against the impeller cover 10 during the pressing process, thereby protecting the impeller cover 10. The end of the pressing block 33 facing away from the cylinder 32 is coaxially provided with a guide chute 331 for coaxially sliding and inserting the impeller cover 10. When the pressing block 33 presses the impeller cover 10, the impeller cover 10 is first inserted into the guide chute 331 on the pressing block 33, so that the position of the impeller cover 10 in the horizontal direction is defined, and the occurrence of the offset of the connection position of the impeller cover 10 and the impeller main body 9 is avoided as much as possible.

A first sensor 7 is mounted on a support 31 near the feed inlet of the conveyor belt 12 for detecting whether the impeller cover 10 is placed on the impeller main body 9, and then a cylinder 32 connected with the information system of the first sensor 7 is used for judging whether the output shaft needs to be started. A second sensor 8 is installed on a bracket 11 near the discharge port of the conveyor belt 12 and used for detecting whether the impeller main body 9 and the impeller cover 10 are completely covered, so that impellers with incomplete covering of the impeller main body 9 and the impeller cover 10 are deleted.

Referring to fig. 4, the connecting members 4 are provided with two sets of connecting members 4 arranged at horizontal intervals in a direction perpendicular to the conveying direction of the conveyor belt 12, and the connecting members 4 include guide posts 42, elastic members 44, limit sliders 43, and limit stoppers 41.

The guide post 42 is fixed on the conveyor belt 12, and the mounting plate 13 is provided with a guide hole 131 for the guide post 42 to vertically slide and insert. The limiting block 41 is fixedly connected with the conveyor belt 12, and a limiting chute 411 which is in sliding connection with the limiting slide block 43 is horizontally arranged on the side wall of the limiting block 41, which is opposite to the guide post 42. The elastic piece 44 is located in the limiting sliding groove 411, one end of the elastic piece 44 is connected with the groove wall of the limiting sliding groove 411, the other end of the elastic piece 44 is fixedly connected with one side, away from the guide post 42, of the limiting sliding block 43, and the elastic piece 44 is usually a spring. The end surface of the limit slider 43, which faces the guide post 42, is a pressing inclined surface inclined upwards in the direction approaching the limit block 41, and the upper end surface of the mounting plate 13 is abutted against the lower end surface of the limit slider 43.

When it is necessary to mount the mounting plate 13 on the conveyor belt 12, the guide holes 131 of the mounting plate 13 are first aligned with the guide posts 42, and then the mounting plate 13 is moved vertically downward, and the guide posts 42 are slidably inserted into the guide holes 131, thereby defining the position of the mounting plate 13 in the horizontal direction. In the vertical downward movement process of the mounting plate 13, the lower end surface of the mounting plate 13 abuts against the pressing inclined surface of the limit slider 43 and moves downward along with the mounting plate 13, and the limit slider 43 is pushed to slide in a direction away from the guide post 42 through the pressing inclined surface. The elastic member 44 contracts until the mounting plate 13 moves to abut against the conveyor belt 12, and the elastic member 44 stretches to drive the limit slider 43 to slide in a direction approaching the guide post 42. The lower end face of the limit slider 43 abuts against the upper end face of the mounting plate 13, so that the position of the mounting plate 13 in the vertical direction is limited, and the mounting plate 13 is connected with the conveyor belt 12.

The implementation principle of the impeller capping and positioning mechanism in the embodiment of the application is as follows: when the impeller main body 9 and the impeller cover 10 are covered, the impeller main body 9 is firstly placed on the upper end face of the positioning seat 2, the blades 91 on the impeller main body 9 are inserted into the positioning grooves 21, and the blades 91 are limited through the positioning grooves 21, so that the probability of deformation of the blades 91 due to extrusion is reduced. And the impeller main body 9 is coaxially and slidably sleeved on the positioning column 6, so that the position of the impeller main body 9 along the horizontal plane is limited. Next, the impeller cover 10 is stacked on the impeller main body 9, and then the positioning seat 2 is conveyed to the position right below the pressing assembly 3 through the conveyor belt 12 and the mounting plate 13, and whether the impeller cover 10 is placed on the impeller main body 9 is detected through the first sensor 7. Further, the output shaft of the cylinder 32 presses the impeller cover 10 vertically downward with the pressing block 33, and the impeller cover 10 moves in a direction approaching the impeller main body 9 until the impeller cover 10 is completely covered with the impeller main body 9. And finally, the conveyer belt 12 conveys the well-covered impeller to a discharge hole of the conveyer belt 12, and whether the impeller main body 9 and the impeller cover 10 are completely covered or not is detected by a second detector. Finally, the deformation of the blades 91 of the fan impeller caused by extrusion is avoided as much as possible, and the yield of the fan impeller is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. An impeller dress lid positioning mechanism, its characterized in that: including conveying subassembly (1), positioning seat (2) and extrusion subassembly (3) that connect gradually from bottom to top, impeller main part (9) have been placed to positioning seat (2) up end and positioning seat (2) up end has been seted up and has been used for the constant head tank with blade (91) looks block on impeller main part (9), impeller main part (9) deviate from positioning seat (2) one end and have been placed impeller lid (10), positioning seat (2) are connected with conveying subassembly (1), extrusion subassembly (3) are connected with conveying subassembly (1), conveying subassembly (1) are used for conveying positioning seat (2) to extrusion subassembly (3) under, extrusion subassembly (3) are used for vertical downwardly pressing impeller lid (10) until impeller lid (10) and impeller main part (9) are covered mutually.

2. The impeller capping positioning mechanism of claim 1, wherein: the conveying assembly (1) comprises a support (11), a conveying belt (12) and a mounting plate (13), wherein the conveying belt (12) is horizontally mounted on the support (11), the mounting plate (13) is provided with a plurality of mounting plates (13) which are mounted on the conveying belt (12) along the conveying direction of the conveying belt (12) at intervals, the conveying belt (12) is provided with a connecting piece (4) which is detachably connected with the mounting plate (13), and the positioning seat (2) is mounted on the end face of the mounting plate (13) deviating from the conveying belt (12).

3. The impeller capping positioning mechanism as claimed in claim 2, wherein: the extrusion assembly (3) comprises a support (31), an air cylinder (32) and a pressing block (33), wherein the support (31) is detachably connected with the support (11), the air cylinder (32) is arranged on the support (31) and located above the conveyor belt (12), an output shaft of the air cylinder (32) is vertically downwards distributed, and the pressing block (33) is fixed on the end face, close to the conveyor belt (12), of the output shaft of the air cylinder (32).

4. The impeller capping positioning mechanism as claimed in claim 2, wherein: the connecting piece (4) is provided with two sets of connecting pieces (4), two sets of connecting pieces (4) are distributed along the horizontal interval of the direction of delivery of perpendicular to conveyer belt (12), connecting piece (4) are including guide post (42), elastic component (44), spacing slider (43) and stopper (41), guide post (42) are fixed in on conveyer belt (12), set up on mounting panel (13) and supply guide post (42) vertical slip male guiding hole (131), stopper (41) are fixed in conveyer belt (12) just stopper (41) just to the lateral wall level of guide post (42) seted up with spacing spout (411) of spacing slider (43) sliding connection, elastic component (44) are located in spacing spout (411) and one end are connected with the cell wall of spacing spout (411), the other end and spacing slider (43) of deviating from guide post (42) are connected fixedly, spacing slider (43) are just to be the terminal surface of guide post (42) along the direction of being close to stopper (41) upwards inclined terminal surface looks at terminal surface (13) of pushing down.

5. The impeller capping positioning mechanism as claimed in claim 2, wherein: and the two sides of the bracket (11) along the conveying direction of the conveying belt (12) are provided with second sensors (8) for detecting the integral height of the impeller main body (9) after being covered with the impeller cover (10).

6. A capping positioning mechanism for impellers according to claim 3, wherein: the support (31) is provided with an installation slide bar (5), the support (11) is provided with an installation chute (111) which is in sliding connection with the installation slide bar (5), the installation chute (111) is arranged along the conveying direction of the transmission belt, and the wall of the installation chute (111) is provided with a bolt hole (112) for the bolt connection of the support (11) and the support (31).

7. A capping positioning mechanism for impellers according to claim 3, wherein: the support (31) is provided with a first sensor (7) for detecting whether the impeller cover (10) is arranged on the impeller main body (9).

8. A capping positioning mechanism for impellers according to claim 3, wherein: the pressing block (33) is made of elastic materials, and one end of the pressing block (33) deviating from the air cylinder (32) is coaxially provided with a guide chute (331) for coaxially sliding and inserting the impeller cover (10).

9. The impeller capping positioning mechanism of claim 1, wherein: the upper end face of the positioning seat (2) is coaxially provided with a positioning column (6), and the positioning column (6) is coaxially inserted into a connecting shaft hole of the impeller main body (9) in a sliding manner.

10. The impeller capping positioning mechanism of claim 1, wherein: an extension groove (22) communicated with the positioning groove (21) is formed in the position, opposite to the positioning groove (21), on the peripheral wall of the positioning seat (2).

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