CN112809352A

CN112809352A - Screw machine for assembling electric meter

Info

Publication number: CN112809352A
Application number: CN202110085024.1A
Authority: CN
Inventors: 张欢; 汪伟
Original assignee: Ningbo Sanxing Smart Electric Co Ltd
Current assignee: Ningbo Sanxing Smart Electric Co Ltd
Priority date: 2021-01-20
Filing date: 2021-01-20
Publication date: 2021-05-18

Abstract

The invention relates to a screw machine for assembling an ammeter, in the screw machine for assembling the ammeter, a rotating platform can be rotatably arranged on a rack, a material conveying platform is arranged adjacent to the rack, a feeding mechanism, a processing device and a discharging mechanism are sequentially arranged along the rotating direction of the rotating platform, a feeding position, a processing position and a discharging position are sequentially arranged on the rotating platform along the upstream to the downstream of the rotating direction of the rotating platform, the feeding mechanism conveys the unassembled ammeter at a material outlet of the material conveying platform to the material position and transfers the unassembled ammeter to the processing device for assembly through the rotation of the rotating platform, the processed ammeter is taken down from the discharging position through the discharging mechanism and transferred to the material outlet of the material conveying platform and transferred to the next station through the material conveying platform, thus the rotating platform, the material conveying platform, the feeding mechanism, the processing device and the discharging mechanism are matched to form a complete assembly line, and the screw driving process can be realized without manual positioning, high production efficiency, no waste product and high practicability.

Description

Screw machine for assembling electric meter

Technical Field

The invention relates to the field of ammeter assembly, in particular to a screw machine for assembling an ammeter.

Background

The intelligent electric meter is one of basic devices for data acquisition of an intelligent power grid, undertakes the tasks of original electric energy data acquisition, metering and transmission, and is the basis for realizing information integration, analysis optimization and information display. The intelligent electric meter has the functions of metering basic electricity consumption of the traditional electric meter, and also has intelligent functions of bidirectional multi-rate metering, user side control, bidirectional data communication of various data transmission modes, electricity larceny prevention and the like in order to adapt to the use of an intelligent power grid and new energy.

After the production of smart electric meter was accomplished, need assemble its housing and base, earlier with housing and base buckle together promptly, then beat the screw in the corner, beat the screw originally and adopt artifical the completion, it is obvious inefficiency, some producers have adopted the form of location frock and electronic screwdriver cooperation work afterwards, the efficiency of equipment has been promoted greatly, but because such equipment form still needs the manual work to get and put, along with present degree of automation is higher and higher, the form of this kind of combination assembly still can not satisfy the production demand.

Therefore, a more efficient assembly method is needed.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a screw machine for assembling an electric meter, which can automatically grab, feed, process and discharge materials, aiming at the current situation of the prior art.

The second technical problem to be solved by the invention is to provide a screw machine for assembling an electric meter, which can accurately position the electric meter to be assembled on a rotating table, aiming at the current situation of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a screw machine for assembling an electricity meter, comprising:

a frame;

also includes:

the rotating table is rotatably arranged on the rack, the rotating axis of the rotating table vertically extends, and a feeding position, a processing position and a discharging position are sequentially arranged on the rotating table from the upstream to the downstream of the rotating direction of the rotating table;

a material conveying table arranged adjacent to the frame, the material conveying table having a discharge port and a feed back port;

the feeding mechanism is used for conveying the unassembled electric meters at the discharge port of the conveying table to the feeding position, is arranged at the upstream of the conveying table along the rotating direction of the rotating table, and is provided with a first clamping assembly capable of moving back and forth between the discharge port of the conveying table and the rotating table at the power output end;

a processing device arranged downstream of the material conveying table and adjacent to the processing position in a rotation direction of the rotating table, the processing device having a bit for turning a screw; and

and the blanking mechanism is used for taking down the assembled electric meter from a blanking position and transferring the assembled electric meter to a blanking opening of the material conveying table, the electric meter is arranged at the downstream of the processing device along the rotating direction of the rotating table, and a power output end of the blanking mechanism is provided with a second clamping assembly which can move back and forth between the rotating table and a material return opening of the material conveying table.

In order to ensure that the rotating table rotates, the electric meter to be loaded on the rotating table cannot displace due to the action of centrifugal force, preferably, the rotating table is provided with at least three positioning seats for limiting the electric meter at intervals in the circumferential direction, when the rotating table rotates to one of the positioning seats and the feeding mechanism, the processing device and the discharging mechanism, the rotating table correspondingly forms the feeding position, the processing position and the discharging position.

In order to ensure that when the material loading, have sufficient material space of getting between fortune material platform and revolving stage, this feed mechanism adopts the form of snatching to carry out the material loading, preferably, feed mechanism still includes material loading platform and cantilever, the rotatable connection of one end wherein of cantilever is in material loading bench and the vertical extension of axis of rotation, first centre gripping subassembly is installed the second end of cantilever, and under the effect of rotation of cantilever swing back and forth between fortune material platform discharge gate and the material loading level.

In order to ensure that the clamping assembly can accurately grab the to-be-assembled power meter at different placing angles, preferably, the first clamping assembly comprises a supporting plate and a first pneumatic clamping jaw, the second end of the cantilever is provided with a machine head, a power output end of the machine head is provided with a connecting rod which vertically extends and rotates along the axis of the connecting rod, the supporting plate is connected onto the connecting rod and can synchronously rotate along with the connecting rod, and the first pneumatic clamping jaw is installed on the connecting rod.

In order to improve the grabbing efficiency, the number of the first pneumatic clamping jaws is at least two, the first pneumatic clamping jaws are arranged at intervals along the extending direction of the supporting plate, the output end of each first pneumatic clamping jaw is provided with two oppositely-arranged jaw heads, and the two jaw heads can be relatively close to or far away from each other so as to correspondingly grab or release the electric meter to be assembled.

In order to further solve the second technical problem, the invention adopts the following technical scheme: the processing device further comprises a limiting mechanism used for positioning the ammeter and a first driving mechanism used for driving the tool bit to rotate, the limiting mechanism is at least partially located above the positioning seat and limits the ammeter to be assembled on the positioning seat when the rotating table rotates to the position where the positioning seat is located at the processing device, the first driving mechanism and the tool bit are both located above the limiting mechanism, and the power output end of the first driving mechanism is in driving connection with the tool bit.

In order to ensure that the power of the first driving mechanism can be transmitted to the cutter head, preferably, the output shaft of the first driving mechanism extends vertically, the output shaft of the first driving mechanism is connected with a first connecting rod, the cutter head is connected with a second connecting rod, and the first connecting rod and the second connecting rod are linked through a joint shaft.

In order to ensure that the tool bit is close to the ammeter when processing, and when getting the ammeter, can not cause the interference to the rotation of revolving stage, processingequipment still includes support frame and second actuating mechanism, second actuating mechanism's power take off end with the support frame drive is connected, so that the relative frame of support frame reciprocates, the tool bit is installed on the support frame to can be along with the synchronous downward or upward movement of support frame, with be close to correspondingly or keep away from the ammeter of treating the assembly.

In order to facilitate assembly, the supporting frame comprises a first bedplate and a second bedplate which are arranged up and down, the cutter head is connected to the first bedplate, and an avoiding notch for the cutter head to pass through is formed in the second bedplate.

In order to ensure that the to-be-installed electricity meter is firmly positioned on the positioning seat, preferably, a compression buffer assembly is further arranged at the bottom of the second bedplate, the compression buffer assembly comprises a sliding sleeve, a sliding rod and an elastic piece, a suspension for installing the sliding sleeve is further arranged at the position of the avoiding notch of the second bedplate, the sliding rod is restrained in the sliding sleeve in a vertically sliding mode, and the elastic piece acts on the sliding rod and enables the sliding rod to always have a downward moving trend.

Specifically, the bottom of the sliding rod is provided with a limiting end, and the elastic piece is a spring which is sleeved on the sliding rod and is limited and supported between the limiting end and the bottom of the suspension.

In order to ensure that the power meter to be assembled cannot deflect left and right when the tool bit works, specifically, the limiting mechanism comprises a third driving mechanism and a third clamping assembly used for limiting the left and right movement of the power meter to be assembled, the power output end of the third driving mechanism is connected with the third clamping assembly, and the rotating table rotates to a state that the positioning seat is located below the tool bit to drive the third clamping assembly to be close to or far away from the positioning seat so as to correspondingly limit or loosen the power meter to be assembled on the positioning seat.

The clamping assemblies can be in different forms, preferably, the third clamping assembly is provided with a limiting frame used for limiting the electric meter to be assembled, the cross section of the limiting frame is basically in a U shape, clamping cylinders are arranged on two side edges of the U shape of the limiting frame respectively, and the two clamping cylinders are abutted against two side surfaces of the electric meter to be assembled respectively in a state that the electric meter to be assembled is limited in the limiting frame.

In order to realize carrying out spacing compensations to the last side of spacing frame in the clamping assembly, this third clamping assembly is still including arranging the central zone's of revolving stage top pushes away the material subassembly, it includes the fixed plate that is used for connecting in the frame, locates to push away material subassembly push rod cylinder and push pedal on the fixed plate, the push pedal is connected push rod cylinder power take off end, and can be close to or keep away from the U-shaped breach of spacing frame along the radial movement of revolving stage under the drive of push rod cylinder, and under the state of waiting to assemble the spacing in spacing frame of ammeter, the push pedal offsets with the corresponding side of waiting to assemble the ammeter.

In order to realize blanking of the assembled electric meter, preferably, the second clamping assembly comprises a fixed platen, a movable platen, a second pneumatic clamping jaw and a fourth driving mechanism, the fixed platen and the movable platen are arranged up and down, the fixed platen is connected to the frame, the second pneumatic clamping jaw is installed at the bottom of the movable platen, the fourth driving mechanism is installed on the fixed platen, a power output end of the fourth driving mechanism is connected to the movable platen, the movable platen can be driven to rotate relative to the fixed platen, and a rotation axis of the movable platen extends vertically.

In order to improve the blanking efficiency, two groups of second pneumatic clamping jaws are arranged side by side, and under the rotating action of the movable platen, the two groups of second pneumatic clamping jaws are alternately positioned above a blanking position or a material returning port of the material conveying platform.

In order to avoid the influence of the second clamping assembly on the rotation of the rotary table when the second clamping assembly is not clamped, the second clamping assembly further comprises a lifting mechanism, and the power output end of the lifting mechanism is connected to the movable table plate and can drive the movable table plate to drive each second pneumatic clamping jaw to synchronously move up and down.

In order to further make things convenient for the transport of ammeter, the fortune material platform includes the support body and locates the conveyer belt at support body top, discharge gate and feed back mouth are arranged in proper order along the direction of delivery of conveyer belt.

Compared with the prior art, the invention has the advantages that: this a screw machine for assembling ammeter, the revolving stage has arranged the material loading position in proper order along self rotation direction's upper reaches to low reaches, add station and unloading position, feed mechanism carries the ammeter that fortune material platform discharge gate department did not assemble to material level department, and transfer to processingequipment department through the rotation of revolving stage and assemble, the ammeter after the processing takes off and transfers to the discharge gate department of fortune material platform from unloading position through unloading mechanism, and transfer to next station through fortune material platform, the revolving stage like this, fortune material platform, feed mechanism, processingequipment and unloading mechanism's cooperation, form complete assembly line, it can realize the process of beating the screw to need not the manual operation location, high production efficiency, can not produce the waste product, and is very practical.

Drawings

FIG. 1 is a schematic view of the overall structure of a screw machine according to an embodiment of the present invention;

FIG. 2 is an overall view from another angle of FIG. 1;

FIG. 3 is a schematic overall view of a loading mechanism in an embodiment of the invention;

FIG. 4 is an overall view from another angle of FIG. 3;

FIG. 5 is an overall schematic view of a material table according to an embodiment of the present invention;

FIG. 6 is a schematic overall view of a blanking mechanism in an embodiment of the invention;

FIG. 7 is a schematic view of a turntable and a processing apparatus according to an embodiment of the present invention;

FIG. 8 is an overall schematic view of a processing apparatus according to an embodiment of the present invention;

FIG. 9 is a schematic view of the overall structure at another angle of FIG. 8;

fig. 10 is an exploded view of a portion of the structure of fig. 9.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 10, the screw machine for assembling an electricity meter according to a preferred embodiment of the present invention includes a frame 1, a rotating table 2, a material conveying table 3, a feeding mechanism 4, a processing device 5, and a discharging mechanism 6, wherein the rotating table 2 is rotatably disposed on the frame 1 and has a rotation axis extending vertically, and the rotating table 2 is sequentially disposed with a feeding position 2a, a processing position 2b, and a discharging position 2c from upstream to downstream in a rotation direction thereof. The above-mentioned material conveying table 3 is arranged adjacent to the frame 1, and the material conveying table 3 has a material outlet 3a and a material return opening 3b, specifically, the material conveying table 3 includes a frame body 31 and a conveyor belt 32 arranged on top of the frame body 31, and the material outlet 3a and the material return opening 3b are arranged in sequence along the conveying direction of the conveyor belt 32.

In this embodiment, the rotating table 2 is provided with at least three positioning seats 20 for limiting the electric meter at intervals in the circumferential direction, and when the rotating table 2 rotates until each positioning seat 20 corresponds to one of the feeding mechanism 4, the processing device 5 and the blanking mechanism 6, the feeding position 2a, the processing position 2b and the blanking position 2c are correspondingly formed on the rotating table 2.

Referring to fig. 3 and 4, in the present embodiment, the feeding mechanism 4 is used for conveying the electric meter unassembled at the discharge port 3a of the material conveying table 3 to the feeding position 2a, and is arranged upstream of the material conveying table 3 along the rotation direction of the rotating table 2, the power output end of the feeding mechanism has a first clamping assembly 40 capable of moving back and forth between the discharge port 3a of the material conveying table 3 and the rotating table 2, the feeding mechanism 4 further comprises a feeding table 41 and a cantilever 42, one end of the cantilever 42 is rotatably connected to the feeding table 41, the rotation axis of the cantilever 42 extends vertically, the first clamping assembly 40 is mounted at the second end of the cantilever 42, and swings back and forth between the discharge port 3a of the material conveying table 3 and the feeding position 2a under the rotation action of the cantilever 42.

The first clamping assembly 40 can be in different forms, the first clamping assembly 40 in the embodiment includes a support plate 401 and a first pneumatic clamping jaw 402, the second end of the cantilever 42 is provided with a machine head 43, the power output end of the machine head 43 is provided with a connecting rod 44 which extends vertically and rotates along the axis of the connecting rod 44, the support plate 401 is connected to the connecting rod 44 and can rotate synchronously with the connecting rod 44, and the first pneumatic clamping jaw 402 is installed on the connecting rod 44. At least two first pneumatic clamping jaws 402 are arranged at intervals along the extending direction of the supporting plate 401, the output end of each first pneumatic clamping jaw 402 is provided with two oppositely arranged jaw heads 4020, and the two jaw heads 4020 can be relatively close to or far away from each other to correspondingly grab or release an electric meter to be assembled.

In order to further realize the screwing process of the electric meter to be assembled, the processing device 5 is arranged at the downstream of the material conveying table 3 and adjacent to the processing station 2b along the rotation direction of the rotating table 2, the processing device 5 is provided with a tool bit 50 for screwing the screw, in addition, in order to further ensure the positioning of the electric meter, the processing device 5 further comprises a limiting mechanism 53 for positioning the electric meter and a first driving mechanism 51 for driving the tool bit 50 to rotate, in addition, under the state that the rotating table 2 rotates until the positioning seat 20 is positioned at the processing device 5, the limiting mechanism 53 is at least partially positioned above the positioning seat 20 and limits the electric meter to be assembled on the positioning seat 20, the first driving mechanism 51 and the tool bit 50 are both positioned above the limiting mechanism 53, and the power output end of the first driving mechanism 51 is in driving connection with the tool bit 50. In this embodiment, an output shaft of the first driving mechanism 51 extends vertically, a first link 511 is connected to the output shaft of the first driving mechanism 51, a second link 501 is connected to the cutter head 50, and the first link 511 and the second link 501 are linked by a joint shaft 502.

Of course, the distance between the cutter head 50 and the electricity meter can be selected according to the requirement of the processing device 5, specifically, the processing device 5 further comprises a support frame 54 and a second driving mechanism 52, a power output end of the second driving mechanism 52 is in driving connection with the support frame 54 so as to enable the support frame 54 to move up and down relative to the rack 1, and the cutter head 50 is mounted on the support frame 54 and can move downwards or upwards synchronously with the support frame 54 so as to correspondingly approach or depart from the electricity meter to be assembled. The supporting frame 54 comprises a first platen 541 and a second platen 542 which are arranged up and down, the cutter head 50 is connected to the first platen 541, and the second platen 542 is provided with an avoiding notch 540 for the cutter head 50 to pass through.

In addition, in order to ensure that the electricity meter cannot move up and down, the bottom of the second bedplate 542 is further provided with a compression buffer assembly 55, the compression buffer assembly 55 comprises a sliding sleeve 551, a sliding rod 552 and an elastic member 553, a suspension 543 for mounting the sliding sleeve 551 is further arranged at the avoiding notch 540 of the second bedplate 542, the sliding rod 552 is constrained in the sliding sleeve 551 in a vertically sliding manner, and the elastic member 553 acts on the sliding rod 552 and enables the sliding rod 552 to always have a downward movement tendency. Specifically, the bottom of the sliding rod 552 has a limit end 554, and the elastic member 553 is sleeved on the sliding rod 552 and limits the spring supported between the limit end 554 and the bottom of the suspension 543.

In order to limit the two sides of the ammeter on the positioning seat, the limiting mechanism 53 includes a third driving mechanism 531 and a third clamping assembly 56 for limiting the movement of the ammeter to be installed, a power output end of the third driving mechanism 531 is connected to the third clamping assembly 56, and the rotating table 2 drives the third clamping assembly 56 to approach or separate from the positioning seat 20 when the positioning seat 20 is rotated to be located below the tool bit 50, so as to correspondingly limit or loosen the ammeter to be installed on the positioning seat 20. Specifically, the third clamping assembly 56 has a limiting frame 561 for limiting the to-be-assembled electric meter, the cross section of the limiting frame 561 is substantially U-shaped, clamping cylinders 562 are respectively arranged on two sides of the U-shaped limiting frame 561, and the two clamping cylinders 562 respectively abut against two sides of the to-be-assembled electric meter in a state that the to-be-assembled electric meter is limited in the limiting frame 561. In addition, the electric meter assembling device further comprises a material pushing assembly 21 arranged in the central area above the rotating platform 2, the material pushing assembly 21 comprises a fixing plate 211 connected to the rack 1, a push rod cylinder 212 arranged on the fixing plate 211 and a push plate 213, the push plate 213 is connected to the power output end of the push rod cylinder 212 and can move along the radial direction of the rotating platform 2 under the driving of the push rod cylinder 212 to be close to or far away from a U-shaped notch of the limiting frame 561, and the push plate 213 abuts against the corresponding side face of the electric meter to be assembled in the state that the electric meter to be assembled is limited in the limiting frame 561.

In the present embodiment, the blanking mechanism 6 is used to remove the assembled electricity meter from the blanking position 2c and transfer the electricity meter to the blanking opening of the material transporting table 3, the blanking mechanism 6 is arranged downstream of the processing device 5 along the rotation direction of the rotating table 2, and the power output end of the blanking mechanism has a second clamping assembly 60 capable of moving back and forth between the rotating table 2 and the material returning opening 3b of the material transporting table 3. The second clamping assembly 60 comprises a fixed platen 61, a movable platen 62, a second pneumatic clamping jaw 63 and a fourth driving mechanism 64, wherein the fixed platen 61 and the movable platen 62 are arranged up and down, the fixed platen 61 is connected to the machine frame 1, the second pneumatic clamping jaw 63 is installed at the bottom of the movable platen 62, the fourth driving mechanism 64 is installed on the fixed platen 61, the power output end of the fourth driving mechanism is connected to the movable platen 62 and can drive the movable platen 62 to rotate relative to the fixed platen 61, and the rotating axis of the movable platen 62 extends vertically. Two groups of the second pneumatic clamping jaws 63 are arranged side by side, and under the rotating action of the movable platen 62, the two groups of the second pneumatic clamping jaws 63 are alternately positioned above the blanking position 2c or the material return opening 3b of the material conveying platform 3. Of course, in order to avoid the influence on the rotation of the rotary table, the second clamping assembly 60 further includes a lifting mechanism 65, and a power output end of the lifting mechanism 65 is connected to the movable platen 62 and can drive the movable platen 62 to drive each second pneumatic clamping jaw 63 to move up and down synchronously.

When the electric meter loading and unloading device works, an electric meter to be loaded is conveyed by the material conveying platform 3, when the electric meter moves to the discharge port 3a, the first clamping assembly 40 of the feeding mechanism 4 conveys the electric meter which is not assembled at the discharge port 3a to the loading position 2a of the rotating platform 2, then the rotating platform 2 rotates, and the electric meter which is positioned on the positioning seat 20 and is not assembled synchronously rotates to the processing device 5 at the downstream of the feeding mechanism 4; the third driving mechanism 531 drives the third clamping assembly 56 to move towards the corresponding positioning seat, the ammeter is limited through the limiting frame 561, the push rod cylinder 212 of the pushing assembly 21 drives the push plate 213 to move along the radial direction of the rotating table 2 and close to the U-shaped notch of the limiting frame 561, so that the ammeter is limited in the circumferential direction, the second driving mechanism 52 drives the support frame 54 to move downwards relative to the rack 1, the limiting end 554 of the pressing buffer assembly 55 is abutted against the top of the ammeter, so that the ammeter is limited in the vertical direction, and then the tool bit 50 is driven by the first driving mechanism 51 to perform screwing operation; after the assembly is completed, the circumferential limit and the vertical limit are withdrawn in sequence, the rotating table 2 continues to rotate until the positioning seat is located at the discharging position 2c, the second clamping assembly 60 takes down the assembled electric meter and puts back the electric meter to the material returning opening 3b again, and the electric meter is conveyed to the next station.

Also, directional terms, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like, may be used in the description and claims to describe various example structural portions and elements of the invention, but are used herein for convenience of description only and are determined based on the example orientations shown in the figures. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims

1. A screw machine for assembling an electricity meter, comprising:

a frame (1);

it is characterized by also comprising:

the rotating platform (2) is rotatably arranged on the rack (1), the rotating axis of the rotating platform vertically extends, and the rotating platform (2) is sequentially provided with a feeding position (2a), a processing position (2b) and a discharging position (2c) from the upstream to the downstream of the rotating direction of the rotating platform;

a material conveying platform (3) arranged adjacent to the frame (1), the material conveying platform (3) having a material outlet (3a) and a material return opening (3 b);

the feeding mechanism (4) is used for conveying the electric meters which are not assembled at the discharge port (3a) of the conveying platform (3) to the feeding position (2a), is arranged at the upstream of the conveying platform (3) along the rotating direction of the rotating platform (2), and the power output end of the feeding mechanism is provided with a first clamping assembly (40) which can move back and forth between the discharge port (3a) of the conveying platform (3) and the rotating platform (2);

a machining device (5) arranged downstream of the conveyor table (3) and adjacent to the machining station (2b) in the direction of rotation of the rotating table (2), the machining device (5) having a tool head (50) for turning the screw; and

the blanking mechanism (6) is used for taking down the assembled electric meter from the blanking position (2c) and transferring the assembled electric meter to a blanking opening of the material transporting platform (3), is arranged at the downstream of the processing device (5) along the rotating direction of the rotating platform (2), and a power output end of the blanking mechanism is provided with a second clamping assembly (60) which can move back and forth between the rotating platform (2) and a material returning opening (3b) of the material transporting platform (3).

2. The screw machine of claim 1, wherein: revolving stage (2) interval is equipped with at least three positioning seat (20) that are used for spacing ammeter in circumference revolving stage (2) rotate to each positioning seat (20) and feed mechanism (4), processingequipment (5) and when one of them corresponds among unloading mechanism (6), correspond on revolving stage (2) and form last material loading level (2a), processing station (2b) and material unloading level (2 c).

3. The screw machine of claim 2, wherein: feed mechanism (4) still include material loading platform (41) and cantilever (42), cantilever (42) wherein one end rotatable connection in material loading platform (41) is last and the vertical extension of axis of rotation, install first centre gripping subassembly (40) the second end of cantilever (42), and under the rotation effect of cantilever (42) swing back and forth between material transporting platform (3) discharge gate (3a) and material loading level (2 a).

4. The screw machine of claim 3, characterized in that: the first clamping assembly (40) comprises a supporting plate (401) and a first pneumatic clamping jaw (402), a machine head (43) is arranged at the second end of the cantilever (42), a power output end of the machine head (43) is provided with a connecting rod (44) which extends vertically and rotates along the axis of the connecting rod, the supporting plate (401) is connected to the connecting rod (44) and can rotate synchronously with the connecting rod (44), and the first pneumatic clamping jaw (402) is installed on the connecting rod (44).

5. The screw machine of claim 4, wherein: the number of the first pneumatic clamping jaws (402) is at least two, the first pneumatic clamping jaws are arranged at intervals along the extending direction of the supporting plate (401), the output end of each first pneumatic clamping jaw (402) is provided with two oppositely arranged clamping jaw heads (4020), and the two clamping jaw heads (4020) can relatively approach to or move away from each other so as to correspondingly grab or release the electric meter to be assembled.

6. The screw machine of claim 2, wherein: the processing device (5) further comprises a limiting mechanism (53) used for positioning an electric meter and a first driving mechanism (51) used for driving a tool bit (50) to rotate, the rotating table (2) rotates to the position seat (20) to be in the state of the processing device (5) position, the limiting mechanism (53) is at least partially located above the position seat (20) and limits the electric meter to be assembled on the position seat (20), the first driving mechanism (51) and the tool bit (50) are both located above the limiting mechanism (53), and the power output end of the first driving mechanism (51) is in driving connection with the tool bit (50).

7. The screw machine of claim 6, wherein: an output shaft of the first driving mechanism (51) vertically extends, a first connecting rod (511) is connected to the output shaft of the first driving mechanism (51), a second connecting rod (501) is connected to the cutter head (50), and the first connecting rod (511) and the second connecting rod (501) are linked through a joint shaft (502).

8. The screw machine of claim 6, wherein: the processing device (5) further comprises a support frame (54) and a second driving mechanism (52), wherein the power output end of the second driving mechanism (52) is in driving connection with the support frame (54) so that the support frame (54) can move up and down relative to the rack (1), and the cutter head (50) is installed on the support frame (54) and can synchronously move down or up along with the support frame (54) so as to be correspondingly close to or far away from an electric meter to be assembled.

9. The screw machine of claim 8, wherein: the supporting frame (54) comprises a first bedplate (541) and a second bedplate (542) which are arranged up and down, the cutter head (50) is connected to the first bedplate (541), and an avoiding notch (540) for the cutter head (50) to pass through is formed in the second bedplate (542).

10. The screw machine of claim 9, wherein: the bottom of the second bedplate (542) is further provided with a pressing buffer assembly (55), the pressing buffer assembly (55) comprises a sliding sleeve (551), a sliding rod (552) and an elastic piece (553), a suspension (543) used for installing the sliding sleeve (551) is further arranged at the position of an avoiding gap (540) of the second bedplate (542), the sliding rod (552) can be constrained in the sliding sleeve (551) in a vertically sliding mode, and the elastic piece (553) acts on the sliding rod (552) and enables the sliding rod (552) to have a downward moving trend all the time.

11. The screw machine of claim 10, wherein: the bottom of the sliding rod (552) is provided with a limiting end (554), and the elastic piece (553) is a spring which is sleeved on the sliding rod (552) and is limited and supported between the limiting end (554) and the bottom of the suspension (543).

12. The screw machine of claim 6, wherein: the limiting mechanism (53) comprises a third driving mechanism (531) and a third clamping assembly (56) used for limiting the electricity meter to be assembled to move left and right, the power output end of the third driving mechanism (531) is connected with the third clamping assembly (56), and the rotating table (2) is rotated to the state that the positioning seat (20) is located below the tool bit (50) to drive the third clamping assembly (56) to be close to or far away from the positioning seat (20), so that the electricity meter to be assembled on the positioning seat (20) is correspondingly limited or loosened.

13. The screw machine of claim 12, wherein: the third clamping assembly (56) is provided with a limiting frame (561) used for limiting the to-be-assembled power distribution meter, the cross section of the limiting frame (561) is basically U-shaped, clamping cylinders (562) are arranged on two sides of the U-shaped limiting frame (561) respectively, and the two clamping cylinders (562) are abutted to two side faces of the to-be-assembled power distribution meter respectively in the state that the to-be-assembled power meter is limited in the limiting frame (561).

14. The screw machine of claim 13, wherein: still including arranging material pushing component (21) in the central zone of revolving stage (2) top, material pushing component (21) is including being used for connecting fixed plate (211) on frame (1), locating push rod cylinder (212) and push pedal (213) on fixed plate (211), push pedal (213) are connected push rod cylinder (212) power take off end, and can be under the drive of push rod cylinder (212) along the radial movement of revolving stage (2) and be close to or keep away from the U-shaped breach of spacing frame (561), and under the state of waiting to assemble the ammeter spacing in spacing frame (561), push pedal (213) offset with the corresponding side of waiting to assemble the ammeter.

15. The screw machine of claim 1, wherein: the second clamping assembly (60) comprises a fixed platen (61), a movable platen (62), a second pneumatic clamping jaw (63) and a fourth driving mechanism (64), the fixed platen (61) and the movable platen (62) are arranged up and down, the fixed platen (61) is connected to the rack (1), the second pneumatic clamping jaw (63) is installed at the bottom of the movable platen (62), the fourth driving mechanism (64) is installed on the fixed platen (61), the power output end of the second pneumatic clamping assembly is connected to the movable platen (62), the second pneumatic clamping assembly can drive the movable platen (62) to rotate relative to the fixed platen (61), and the rotating axis of the movable platen (62) extends vertically.

16. The screw machine of claim 15, wherein: two groups of second pneumatic clamping jaws (63) are arranged side by side, and under the rotating action of the movable platen (62), the two groups of second pneumatic clamping jaws (63) are alternately positioned above the blanking position (2c) or the material return opening (3b) of the material conveying platform (3).

17. The screw machine of claim 16, wherein: the second clamping assembly (60) further comprises a lifting mechanism (65), the power output end of the lifting mechanism (65) is connected to the movable platen (62), and the lifting mechanism can drive the movable platen (62) to drive each second pneumatic clamping jaw (63) to synchronously move up and down.

18. The screw machine of claim 1, wherein: the material conveying platform (3) comprises a frame body (31) and a conveying belt (32) arranged at the top of the frame body (31), and the discharge port (3a) and the feed back port (3b) are sequentially arranged along the conveying direction of the conveying belt (32).