CN210172954U

CN210172954U - Screw driving machine

Info

Publication number: CN210172954U
Application number: CN201920659381.2U
Authority: CN
Inventors: Han Wang; 汪涵
Original assignee: Changzhou College of Information Technology CCIT
Current assignee: Changzhou College of Information Technology CCIT
Priority date: 2019-05-09
Filing date: 2019-05-09
Publication date: 2020-03-24
Anticipated expiration: 2029-05-09

Abstract

The utility model provides a screw twisting machine, includes the base plate, the base plate is the rectangle metal sheet of placing along the horizontal direction, it has the optical axis to run through on the four corners of base plate, the fixed plate is installed at the top of optical axis, install separation and reunion subassembly between fixed plate and the base plate, the motor is installed to the top surface of base plate, the bottom surface of base plate is equipped with the action wheel, follows the driving wheel. The beneficial effects are as follows: the screwdriver is matched with the workpiece in position, the screwdriver only needs to be moved in the vertical direction, the rotation driving of the screwdriver is achieved, and the screwdriver is simple in structure and convenient to use. All screws are screwed at one time, so that the production efficiency is improved. And for the screwing of all screws, only one motor is needed, the cost is further controlled, and the screwing synchronization rate and the screwing efficiency are improved.

Description

Screw driving machine

Technical Field

The utility model relates to an assembly machine field, especially a screw twisting machine.

Background

In the field of assembly machinery, screwing screws and bolts are the most commonly used assembly fixing mode. In the prior art, the working mechanism of a machine for automatically screwing screws is that an electric screwdriver is fixed on a manipulator, generally a three-axis gantry manipulator, an electric control circuit is designed according to the structures of the electric screwdriver and the manipulator, and a program is written based on the position of a screw in a workpiece, so that the manipulator controls the screwdriver to complete the screwing-in of the screw and a bolt one by one in a programmed manner. It can be seen from the above working mechanism that firstly the screw drivers need to be screwed one by one, the working efficiency is low, secondly, although the circuit is fixed, the program needs to be written according to the position of each bolt in each workpiece, the program is complex, and finally, whether the positioning is accurate after the manipulator moves each time needs the corresponding sensing electrical part for judgment and feedback.

Disclosure of Invention

The utility model aims at solving the problem, designing a screw twisting machine. The specific design scheme is as follows:

the utility model provides a screw twisting machine, includes the base plate, the base plate is the rectangle metal sheet of placing along the horizontal direction, it has the optical axis to run through on the four corners of base plate, the fixed plate is installed at the top of optical axis, install separation and reunion subassembly between fixed plate and the base plate, the motor is installed to the top surface of base plate, the bottom surface of base plate is equipped with the action wheel, follows the driving wheel, the motor shaft of motor runs through the base plate and with the action wheel key-type connection, the motor shaft of motor with the base plate bearing is connected, be connected with the connecting rod between action wheel and the follow driving wheel, the metal pole that the connecting rod was placed for following the horizontal direction.

The clutch assembly comprises at least two cylinders, the cylinder bodies of the cylinders are fixedly connected with the fixing plate, the cylinder shafts of the cylinders are fixedly connected with the base plate, the cylinder shafts of the cylinders are distributed along the direction of pursuing, and the lower portions of the cylinder bodies of the cylinders are fixedly connected with the fixing plate.

The clutch assembly comprises an electromagnet and metal blocks, wherein the electromagnet is opened and closed through an electromagnetic relay, the electromagnet is fixed on the bottom surface of the fixing plate, the metal blocks are fixed on the top surface of the base plate, the metal blocks are located under the electromagnet, and the clutch assembly is multiple in number. The clutch component has the main function of completing the separation of the screwdriver, the screw and the nut after the screw is screwed down, so the clutch component is shorter in formation, preferentially adopts the electromagnet and the metal block as the clutch component, and preferentially adopts the air cylinder as the clutch component if the screw is longer and is screwed deeper.

The guide post is a metal post vertically placed in the axial direction, the top end of the guide post and the driving wheel are preferably of an integral structure formed by one-step forging, the guide post penetrates through one end of the connecting rod from top to bottom, the connecting rod is connected with a front bearing of the guide post, a bearing used for connecting the connecting rod with the guide post is an axial limiting bearing, and a radial limiting bearing used for realizing guiding through two spring bearings is preferred.

A shaft pin is connected between the connecting rod and the driven wheel, the shaft pin is vertically arranged in the axial direction, the bottom surface of the shaft pin is connected with the driven wheel, specifically, the shaft pin and the driven wheel are of an integral structure formed by one-step forging, the shaft pin penetrates through the other end of the connecting rod from bottom to top, the connecting rod is connected with the shaft pin bearing, the bearing used for connecting the connecting rod with the shaft pin is an axial limiting bearing, preferably a radial limiting bearing for realizing guidance through two spring bearings, the top end of the shaft pin is connected with a connecting ring, the connecting ring is embedded in the substrate and connected with the substrate bearing, the bearing used for connecting the connecting ring with the substrate is an axial bearing, the connecting ring is an annular structure vertically distributed in the axial direction, and the top surface of the shaft pin is preferably connected with the bottom surface of the connecting ring annular, the connecting ring, the shaft pin and the driven wheel are integrally formed into a crankshaft structure.

The number of the driven wheels is multiple, each driven wheel is connected with the driving wheel through an independent connecting rod, and each independent connecting rod is located at different heights.

The top surface of the screwdriver is fixedly connected with the driven wheel, the fixed connection is reversible fixed connection, specifically, the screwdriver is a metal column which is vertically placed, the top of the screwdriver is a hexagonal nut, the hexagonal nut is embedded into the driven wheel from bottom to top and is connected through a screw pin, the screw pin penetrates through the screwdriver and the driven wheel in the horizontal direction and is fixed with the screwdriver and the driven wheel in a threaded manner, the screw pin is screwed into two ends of the pin column of the screw pin through a nut, a gasket is padded between the nut and the side wall of the driven wheel, and the gasket is a colloid gasket.

The bottom of the screwdriver comprises one of a straight screwdriver head, a cross screwdriver head, an inner hexagonal screwdriver head, an inner square screwdriver head, an outer square screwdriver head and an outer hexagonal screwdriver head which are formed by forging the screwdriver at one time.

The safety of the falling position of the base plate is ensured by installing a contact type pressure sensor on the guide pillar, the pressure sensor can be fixed on the guide pillar through a clamp, the direction of a sensor contact point is upward and is contacted with the bottom surface of the base plate, meanwhile, a torque sensor is also needed to be installed, the damage to a screw buckle of a screw and a channel opening of a screwdriver caused by over-tightening of the screw is avoided, and the torque sensor can be installed on the guide pillar or a motor shaft.

Through the utility model discloses an above-mentioned technical scheme obtains twists screw machine, its beneficial effect is:

the screwdriver is matched with the workpiece in position, the screwdriver only needs to be moved in the vertical direction, the rotation driving of the screwdriver is achieved, and the screwdriver is simple in structure and convenient to use. All screws are screwed at one time, so that the production efficiency is improved. And for the screwing of all screws, only one motor is needed, the cost is further controlled, and the screwing synchronization rate and the screwing efficiency are improved.

Drawings

Fig. 1 is a schematic structural view of a screwing machine (a clutch assembly is a cylinder) according to the present invention;

fig. 2 is a schematic structural view of the screw driving machine (the clutch assembly is a cylinder) according to the present invention after being lifted;

fig. 3 is a schematic structural view of the screwing machine (the clutch assembly is an electromagnet) according to the present invention;

fig. 4 is a schematic structural view of the screw driving machine (the clutch assembly is an electromagnet) according to the present invention after being lifted;

fig. 5 is a schematic structural view of the screwdriver and the driven wheel after being fixed;

in the figure, 1, a substrate; 2. an optical axis; 3. a fixing plate; 4. a clutch assembly; 4a, a cylinder; 4b, an electromagnet; 4c, a metal block; 5. a motor; 6. a driving wheel; 7. a driven wheel; 8. a connecting rod; 9. a screwdriver; 10. a guide post; 11. a shaft pin; 12. a connecting ring; 13. a screw pin; 14. a nut; 15 shim.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The utility model provides a screw twisting machine, includes base plate 1, base plate 1 is the rectangle metal sheet of placing along the horizontal direction, it has optical axis 2 to run through on base plate 1's the four corners, fixed plate 3 is installed at optical axis 2's top, install separation and reunion subassembly 4 between fixed plate 3 and the base plate 1, motor 5 is installed to base plate 1's top surface, base plate 1's bottom surface is equipped with action wheel 6, follows driving wheel 7, motor 5's motor shaft runs through base plate 1 and with 6 key-type connections of action wheel, motor 5's motor shaft with 1 bearing of base plate is connected, be connected with connecting rod 8 between action wheel 6 and the follow driving wheel 7, connecting rod 8 is the metal pole of placing along the horizontal direction, install screwdriver 9 from the bottom of driving wheel 7.

The clutch assembly 4 includes cylinders 4a, the cylinder bodies of the cylinders 4a are fixedly connected to the fixing plate 3, the cylinder shafts of the cylinders 4a are fixedly connected to the substrate 1, specifically, the number of the cylinders 4a is at least two, the cylinder shafts of the cylinders 4a are distributed along the direction of tracing, and the lower portions of the cylinder bodies of the cylinders 4a are fixedly connected to the fixing plate 3.

The clutch assembly 4 comprises an electromagnet 4b and a metal block 4c, the electromagnet 4b is fixed on the bottom surface of the fixing plate 3, the metal block 4c is fixed on the top surface of the substrate 1, the metal block 4c is located under the electromagnet 4b, and the clutch assembly 4 is multiple in number. The clutch component 4 is mainly used for separating the screwdriver 9 from the screw and the nut after the screw is screwed down, so that the clutch component is short in formation, the electromagnet 4b and the metal block 4c are preferentially adopted as the clutch component, and if the screw is long and is screwed down deeply, the air cylinder 4a is preferentially adopted as the clutch component.

The guide post structure is characterized in that a guide post 10 is connected between the connecting rod 8 and the driving wheel 6, the top surface of the guide post 10 is connected with the driving wheel 6, specifically, the guide post 10 is a metal post vertically placed in the axial direction, the top end of the guide post 10 and the driving wheel 6 are preferably of an integral structure formed by one-step forging, the guide post 10 penetrates through one end of the connecting rod 8 from top to bottom, the connecting rod 8 is connected with a front bearing of the guide post 10, a bearing used for connecting the connecting rod 8 and the guide post 10 is an axial limiting bearing, and a radial limiting bearing for realizing guiding through two spring bearings is preferred.

A shaft pin 11 is connected between the connecting rod 8 and the driven wheel 7, the shaft pin is vertically arranged in the axial direction, the bottom surface of the shaft pin 11 is connected with the driven wheel 7, specifically, the shaft pin 11 and the driven wheel 7 are of an integral structure formed by one-step forging, the shaft pin 11 penetrates through the other end of the connecting rod 8 from bottom to top, the connecting rod 8 is in bearing connection with the shaft pin 11, a bearing used for connecting the connecting rod 8 and the shaft pin 11 is an axial limiting bearing, preferably a radial limiting bearing for realizing guiding through two spring bearings, the top end of the shaft pin 11 is connected with a connecting ring 12, the connecting ring 12 is embedded in the substrate 1 and is in bearing connection with the substrate 1, the bearing used for connecting the connecting ring 12 and the substrate 1 is an axial bearing, and the connecting ring 12 is of an annular structure vertically distributed in the axial, the top surface of the shaft pin 11 is preferably connected with the bottom surface of the annular structure of the connecting ring 12 by welding, and the connecting ring 12, the shaft pin 11 and the driven wheel 7 are integrally formed into a crankshaft structure.

The number of the driven wheels 7 is multiple, each driven wheel 7 is connected with the driving wheel 6 through an independent connecting rod 8, and each independent connecting rod 8 is located at different heights.

The top surface of the screwdriver 9 is fixedly connected with the driven wheel 7, the fixed connection is reversible fixed connection, specifically, the screwdriver 9 is a metal column which is vertically placed, the top of the screwdriver 9a is a hexagonal nut which is embedded into the driven wheel 7 from bottom to top and connected through a screw pin 13, the screw pin 13 penetrates through the screwdriver and the driven wheel 7 along the horizontal direction and is in threaded connection with the screwdriver and the driven wheel 7, the hexagonal nut is screwed into two ends of the pin column of the screw pin 13 through a nut 14 to be fixed, a gasket 15 is padded between the nut 14 and the side wall of the driven wheel 7, and the gasket 15 is a colloid gasket.

The bottom of the screwdriver 9 comprises one of a straight screwdriver head, a cross screwdriver head, an inner hexagonal screwdriver head, an inner square screwdriver head, an outer square screwdriver head and an outer hexagonal screwdriver head which are formed by forging the screwdriver 9 at one time.

The safety of the falling position of the base plate 1 is ensured by installing a contact type pressure sensor on the guide pillar 2, the pressure sensor can be fixed on the guide pillar 2 through a hoop, the contact direction of the sensor is upward and is contacted with the bottom surface of the base plate 1, meanwhile, a torque sensor is also needed to be installed, the damage to a screw thread of a screw and a channel opening of a screwdriver caused by over-tightening of the screw is avoided, and the torque sensor can be installed on the guide pillar or a motor shaft.

The working principle is as follows:

the motor 5 is used as torque output, the connecting rod 8 is used as a driving wheel 6 to be in rotating transmission with the support of the driven wheel 7, the driven wheel 7 drives the screwdriver 9 to rotate, and a screwdriver is screwed by a screwdriver head at the bottom of the screwdriver 9.

The clutch component 4 is used for realizing the up-and-down movement of the base plate 1 and the attachment elements on the base plate 1, and the final purpose is to realize the engagement and separation of the cutter head and the screw.

The positions of the driven wheel 7 and the screwdrivers 9 are designed according to the positions of screws on a workpiece, and the screwdrivers 9 synchronously rotate to finish screwing all the screws at one time.

If the screws on the workpiece are positioned at different heights, synchronous screwing can be realized by mounting the screwdrivers 9 with different lengths, namely, when the screw position is higher, the shorter screwdriver 9 is adopted.

Cost control:

can with the current work piece conveying machinery of enterprise's production line, the screw material loading machinery direct adaptation in upper reaches, need not the conveying of independent redesign work piece and the blanking machine of screw, the production line is built with low costsly.

Most elements can be shared for different workpiece processing, the main difference is the position of the connecting ring 12 on the base plate 1 and the difference of the lengths of the connecting rod 8 and the screwdriver 9, the base plate 1, the connecting rod 8 and the screwdriver 9 are all basic castings or forgings, and the mounting position of the connecting ring 12 on the base plate 1 can be finished by punching after casting, so that the overall cost is low.

Example 1

The method adopts the electromagnet 4b and the metal block 4c as clutch components to carry out screwing operation, and comprises the following operation steps:

step 1, moving a workpiece to the lower part of a substrate 1;

step 2, the electromagnet 4b is disconnected to supply power;

step 3, the metal block 4c loses magnetic adsorption;

step 4, the substrate 1 falls;

step 5, the functional block 9 falls synchronously, and the tool bit is positioned at the screw;

step 6, starting the motor 5, and driving the driving wheel 6 to rotate by the motor 5;

step 7, the guide post 10 revolves around the wheel center of the driving wheel;

step 8, the connecting rod 8 rotates synchronously;

step 9, the connecting rod 8 drives the driven wheel 7 and the connecting ring 12 to synchronously rotate through the shaft pin 11;

step 10, the driven wheel 7 drives the screwdriver 9 to rotate;

step 11, when the tool bit of the screwdriver 9 rotates synchronously, the tool bit is matched with the screw;

step 12, screwing the screw downwards based on the rotation of the screwdriver 9;

and step 13, after the screw moves downwards, continuously keeping the tool bit matched with the screw based on the gravity pressing of the substrate 1 and the screwdriver 9, and synchronously moving downwards until the screw is screwed down.

Step 14, stopping the motor 5;

step 15, electrifying the electromagnet 4b, and adsorbing the metal block 4c with the electromagnet 4b based on magnetic force;

step 16, moving the substrate 1 upwards integrally, and pulling out screw holes of the workpiece by using a screwdriver 9;

and step 17, the conveying machine removes the workpiece and moves the next workpiece to the lower part of the substrate 1.

Example 2

The air cylinder is adopted as a clutch component to carry out screwing operation, and the operation steps are as follows:

step 1, moving a workpiece to the lower part of a substrate 1;

step 2, starting the air cylinder 4 a;

step 3, moving the cylinder shaft of the cylinder 4a downwards;

step 4, the substrate 1 falls;

step 8, the connecting rod 8 rotates synchronously;

step 10, the driven wheel 7 drives the screwdriver 9 to rotate;

and step 13, after the screw moves downwards, continuously outputting downward pressure through the air cylinder 4a, continuously keeping the tool bit matched with the screw, and synchronously moving downwards until the screw is screwed down.

Step 14, stopping the motor 5;

step 15, resetting the air cylinder 4a, wherein the cylinder shaft of the air cylinder is retracted into the cylinder body;

Example 3

Mounting of the screwdriver 9:

step 1, selecting a screw sweeper 9 with proper length and proper tool bit according to a workpiece;

step 2, inserting the screwdriver 9 into the driven wheel 7 from bottom to top;

step 3, through holes at the upper part of the screwdriver 9 and the side end of the driven wheel 7 are formed;

step 4, screwing in the screw pin 13;

step 5, sleeving gaskets 15 on two ends of the screw pin 13;

and 6, screwing nuts 14 at two ends of the screw pin 13 and tightening.

Example 4

The bolt screwing process of the traditional process comprises the following steps:

step 1, moving a workpiece to the lower part of a screw twisting machine;

step 2, starting the mechanical arm, and moving the electric screwdriver above the bolt hole based on the driving of the mechanical arm in the X-axis direction and the Z-axis direction;

step 3, judging whether the electric screwdriver is in place or not based on the position sensor;

step 4, starting the mechanical arm, and enabling the electric screwdriver to be embedded into the screw hole based on the drive of the mechanical arm in the Y-axis direction;

step 5, starting the electric screwdriver and screwing down the screw;

step 6, after the screw moves downwards, continuously outputting downward pressure through Y-axis driving, continuously keeping the tool bit matched with the screw, and synchronously moving downwards until the screw is screwed down;

step 7, the electric screwdriver is turned off,

step 8, pulling the electric screwdriver out of the bolt hole based on the driving in the Y-axis direction;

step 9, repeating the steps 2-8 until all screws are screwed down;

and 10, removing the workpiece by the conveying machine, and moving the next workpiece to the lower part of the mechanical arm.

Example 5

The utility model provides a though not existing technology, but can realize the frock of synchronous screw tightening, its structure includes base plate 1, guide pillar 2, fixed plate 3, clutch module 4 and a plurality of electric screwdriver, and its operation step is:

step 1, moving a workpiece to the lower part of a substrate 1;

step 2, starting the air cylinder 4 a;

step 3, moving the cylinder shaft of the cylinder 4a downwards;

step 4, the substrate 1 falls;

step 5, the electric screwdriver falls down synchronously, and the screwdriver head is positioned at the screw;

step 6, starting all the electric screwdrivers to finish the screwing of the workpiece;

and 7, continuously outputting downward pressure through the air cylinder 4a, continuously keeping the tool bit matched with the screw, and synchronously moving downwards until the screw is screwed down

Step 8, stopping the electric screwdriver,

step 9, resetting the air cylinder 4a, wherein the cylinder shaft is retracted into the cylinder body;

step 10, moving the substrate 1 upwards integrally, and pulling out screw holes of the workpiece by an electric screwdriver;

and 11, removing the workpiece by the conveying machine, and moving the next workpiece to be below the substrate 1.

Comparative example 1

Comparison of example 1 with example 2:

the main difference between the embodiment 1 and the embodiment 2 is that the embodiment 1 adopts an electromagnet and a metal block as the clutch assembly 4, while the embodiment 2 adopts a cylinder as the clutch assembly 4, and the comparison can show that:

difference 1. embodiment 1 has a free fall in step 5, whereas embodiment 2 is driven to move down by the cylinder 4 a. Based on the difference, the processing of the workpiece with the longer screw is more suitable for selecting the cylinder 4a as the clutch assembly, and the damage to equipment or the workpiece caused by the excessively high falling distance is avoided.

Difference 2. step 5 and step 15, the corresponding speed of example 1 is faster. Based on this difference, the structure in embodiment 1 is more preferably adopted for the work processing in which the screw is formed shorter, and the processing efficiency can be improved.

The difference 3 is that the embodiment 1 only needs electric control and power supply, and does not need air supply, and if the upstream and downstream production equipment does not have pneumatic and hydraulic equipment, the structure described in the embodiment 1 is preferentially adopted, so that the production line structure can be simplified.

Difference 4 in step 13, in embodiment 1, the engagement of the bit and the screw is ensured only based on gravity, but in embodiment 2, the engagement of the bit and the screw can also be realized by the pressing of the cylinder 4a, and if there is a high requirement for the degree of tightening, the structure described in embodiment 2 is preferably adopted, but if the requirement is not high and the screw is easily damaged, the structure described in embodiment 1 is adopted in advance, and after the screw is tightened to a certain degree, the screw may overflow.

Comparative example 2

Example 1, example 2 as a whole technique 1, compared with example 4:

difference 1. the apparatus in embodiment 4 requires a three-axis robot as a basic structure, which is high in production cost, while the structure of technique 1 is simple, and basically, it is simple to be composed of a casting and a forging, which is low in cost.

The difference 2 is that the embodiment 4 and the technology 1 are both basic electric part driving, and the difference in electric control design is not great, but the embodiment 4 needs to program each screw position, the screw position of each workpiece is different, and the design is complex, while the technology 1 only needs to punch holes by a punch press based on the screw positions of the workpieces and install the workpieces through the connecting ring 12.

Difference 3. in example 4, screws need to be screwed one by one, and in the technique 1, all screws are screwed at one time, so that the production efficiency is improved.

Difference 4, in embodiment 4, a sensor at least equal to the screw position needs to be installed to ensure position calibration, the cost is high, the electronic control is complex, the technology 1 only needs to control the falling position and the motor torque, the electric screwdriver adopted in embodiment 4 is internally provided with a torque sensor, and the three-axis manipulator is provided with the condition for installing the sensor for controlling the falling position.

Comparative example 3

The technique 2 as a whole in example 1 and example 2 is compared with example 5, and the main difference is that,

difference 1, in example 5, a plurality of electric screwdrivers are adopted, so that the cost is very high, the technology 2 is driven by only a single motor, and the cost of the screwdriver 9 and the transmission part thereof is far lower than that of the electric screwdrivers.

Difference 2. based on difference 1, the mechanical transmission is more robust and durable, and if one electric screwdriver is damaged in the embodiment 5, the replacement and maintenance cost is far higher than that of the screwdriver 9.

And 3, if the screws are relatively close, the screws cannot be arranged side by side according to the diameter of the conventional electric screwdriver, and the minimum distance of the screws in the technology 2 depends on the outer diameter of the driven wheel 7, and the diameter of the driven wheel 7 is far smaller than that of the conventional electric screwdriver, so that the screw can be used for relatively secret screw tightening operation.

Above-mentioned technical scheme has only embodied the utility model discloses technical scheme's preferred technical scheme, some changes that this technical field's technical personnel probably made to some parts wherein have all embodied the utility model discloses a principle belongs to within the protection scope of the utility model.

Claims

1. The utility model provides a screw twisting machine, includes base plate (1), base plate (1) is the rectangle metal sheet of placing along the horizontal direction, it has optical axis (2) to run through on the four corners of base plate (1), fixed plate (3) are installed at the top of optical axis (2), a serial communication port, install separation and reunion subassembly (4) between fixed plate (3) and base plate (1), motor (5) are installed to the top surface of base plate (1), the bottom surface of base plate (1) is equipped with action wheel (6), follows driving wheel (7), be connected with connecting rod (8) between action wheel (6) and follow driving wheel (7), connecting rod (8) are the metal pole of placing along the horizontal direction, install screwdriver (9) from the bottom of driving wheel (7).

2. The screwing machine according to claim 1, wherein said clutch assembly (4) comprises a cylinder (4a), the body of said cylinder (4a) being fixedly connected to said fixed plate (3), the cylinder axis of said cylinder (4a) being fixedly connected to said base plate (1).

3. The screwing machine according to claim 1, wherein said clutch assembly (4) comprises an electromagnet (4b), a metal block (4c), said electromagnet (4b) being fixed to the bottom surface of said fixed plate (3), said metal block (4c) being fixed to the top surface of said base plate (1), said metal block (4c) being located directly below said electromagnet (4 b).

4. The screwing machine according to claim 1, wherein a guide post (10) is connected between the connecting rod (8) and the driving wheel (6), the top surface of the guide post (10) is connected with the driving wheel (6), the guide post (10) penetrates one end of the connecting rod (8) from top to bottom, and the connecting rod (8) is connected with the front bearing of the guide post (10).

5. The screwing machine according to claim 1, wherein a shaft pin (11) is connected between the connecting rod (8) and the driven wheel (7), the bottom surface of the shaft pin (11) is connected with the driven wheel (7), the shaft pin (11) penetrates through the other end of the connecting rod (8) from bottom to top, the connecting rod (8) is in bearing connection with the shaft pin (11), the top end of the shaft pin (11) is connected with a connecting ring (12), and the connecting ring (12) is embedded in the base plate (1) and is in bearing connection with the base plate (1).

6. The screwing machine according to claim 1, wherein said driven wheels (7) are provided in plurality, each driven wheel (7) being connected to said driving wheel (6) by a respective independent link (8).

7. Screwing machine according to claim 1, wherein the top face of said screwdriver (9) is fixedly connected to said driven wheel (7), said fixed connection being a reversible fixed connection.

8. The screwing machine according to claim 1, wherein the bottom of said screwdriver (9) comprises a head formed by one-step forging with said screwdriver (9), said head comprising one of a straight screwdriver head, a cross head, an inner hexagonal head, an inner square head, an outer square head, and an outer hexagonal head.