CN220922222U - Connecting mechanism of electric pen type screwdriver - Google Patents

Abstract

The utility model relates to the technical field of electric screwdrivers, in particular to a connecting mechanism of an electric pen-type screwdriver. The device comprises a shell, a driving device and a connecting mechanism, wherein a transmission mechanism is arranged in the shell, and the driving device is arranged at the top of the shell and is connected with the transmission mechanism; the connecting mechanism is arranged at the bottom of the shell; the bottom of the shell is provided with a first baffle, the connecting mechanism comprises a first fixed seat arranged at the bottom of the shell and a rotating shaft module rotatably arranged on the first fixed seat, and the rotating shaft module is connected with the transmission mechanism; the first fixing seat is arranged at the bottom of the shell, and the top of the rotating shaft module is propped against the first baffle. Compared with the prior art, the first baffle plate can be used for limiting the transmission mechanism; when the rotating shaft module is arranged on the first fixing seat, the first fixing seat can be vertically arranged at the bottom of the shell; the position of each spare part is convenient for control, and each spare part is difficult for dropping in the installation, does not need to maintain the concrete position of each spare part deliberately to the equipment of being convenient for.

Description

Connecting mechanism of electric pen type screwdriver

Technical Field

The utility model relates to the technical field of electric screwdrivers, in particular to a connecting mechanism of an electric pen-type screwdriver.

Background

The electric screwdriver, the alien electric screwdriver and the electric screwdriver are electric tools for screwing and unscrewing screws, and are one of assembly tools with wide application.

In the prior art, an electric screwdriver generally comprises a motor, a shell and a connecting mechanism, wherein the motor is arranged at one end of the shell, the connecting mechanism is arranged at the other end of the shell, a transmission mechanism for connecting the motor and the connecting mechanism is arranged in the shell, and the transmission mechanism is driven by the motor, so that the connecting mechanism is screwed down and unscrewed. After the motor is installed at one end of the housing, the transmission mechanism needs to be installed from the bottom of the housing, and then the connection mechanism is installed at the bottom of the housing.

The inventor finds that the limit on each part of the connecting mechanism and the transmission mechanism is lacking in the actual production process; if the vertical type installation is adopted, each part of the transmission mechanism installed in the shell is easy to fall from the bottom of the shell; if inverted mounting is adopted, each component of the connecting mechanism is easy to fall off; therefore, when the gear box is assembled, the shell, the connecting mechanism and the transmission mechanism can be transversely placed, then all parts of the connecting mechanism and the transmission mechanism are fixed, the transmission mechanism is transversely installed in the shell, and finally the connecting mechanism is installed in the shell, so that the assembly of the connecting mechanism and the gear box can be completed; therefore, because the limit on each part is lacking, the situation that the parts fall easily occurs during assembly, so that the assembly operation is complicated, the positions of each part need to be specially noted, the assembly can be completed, and the assembly process is very inconvenient.

Therefore, a new technical solution is needed to solve the above problems.

Disclosure of utility model

In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its main objective is to provide a connection mechanism for an electric pen-type screwdriver, which effectively solves the technical drawbacks of inconvenient assembly of the electric pen-type screwdriver in the prior art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The connecting mechanism of the electric pen-type screwdriver comprises a shell, a driving device and a connecting mechanism, wherein a transmission mechanism is arranged in the shell, the driving device is arranged at the top of the shell and is connected with the transmission mechanism, and the connecting mechanism is arranged at the bottom of the shell; the bottom of the shell is provided with a first baffle, the connecting mechanism comprises a first fixed seat arranged at the bottom of the shell and a rotating shaft module rotatably arranged on the first fixed seat, and the rotating shaft module is connected with the transmission mechanism; the first fixing seat is arranged at the bottom of the shell, and the top of the rotating shaft module is propped against the first baffle.

The connecting mechanism of the electric pen-type screwdriver provided by the application has the beneficial effects that: compared with the prior art, the first baffle is arranged at the bottom of the shell, so that the transmission mechanism can be limited by the first baffle; when the rotating shaft module is arranged on the first fixing seat, the first fixing seat can be vertically arranged at the bottom of the shell; the mounting mode is convenient for control the position of each part, and each part is difficult to drop in the mounting process, and the specific position of each part does not need to be maintained deliberately so as to be convenient for assembly. Simultaneously, utilize first baffle to carry out axial spacing to drive mechanism and pivot module to improve the assembly precision between each part.

As a preferred embodiment: the rotating shaft module comprises a first rotating shaft rotatably arranged on the first fixing seat and a first connecting piece overlapped at the top of the first rotating shaft, the transmission mechanism is provided with a first transmission shaft, and the first transmission shaft penetrates through the first baffle plate to be connected with the first connecting piece.

As a preferred embodiment: the first connecting piece is provided with first connecting hole, and first connecting hole has first spacing plane at least, and first transmission shaft is provided with the spacing plane of second with the spacing plane adaptation of first.

As a preferred embodiment: at least two convex edges are arranged on one side surface of the first connecting piece, which faces the first rotating shaft, the two convex edges are arranged at a circular interval at the center position of the first connecting piece, and a roller is arranged between the two convex edges; the convex edge can extend to the side of the first rotating shaft, and a third limiting plane for the roller to lean against is arranged on the side surface of the top of the first rotating shaft.

As a preferred embodiment: the first fixing seat is provided with a limiting cavity, the limiting cavity penetrates through the upper surface and the lower surface of the first fixing seat, and the limiting cavity is provided with a limiting step; the first rotating shaft is provided with a first limiting convex ring, and the first limiting convex ring is abutted against the limiting step.

As a preferred embodiment: the first rotating shaft comprises a first shaft body and a second shaft body, the first limiting convex ring is arranged between the first shaft body and the second shaft body, and the convex edge extends to the first limiting convex ring and is positioned on the side where the second shaft body is located.

As a preferred embodiment: the top of the first fixing seat is provided with a first assembling convex ring, the bottom of the shell is provided with a second assembling convex ring, and the first assembling convex ring can be inserted into the inner side surface of the second assembling convex ring.

As a preferred embodiment: the shell is provided with a first installation cavity, the first installation cavity penetrates through the top of the shell to form a first opening, a first substrate is installed at the first opening, and the driving device is fixedly installed on the first substrate.

As a preferred embodiment: the first installation cavity surface integrated into one piece has the ring gear, and drive mechanism is the speed reduction tooth group, and the speed reduction tooth group has one-level speed reduction tooth group at least, and one-level speed reduction tooth group is including first rolling disc and install in a plurality of one-level reduction gears of a first rolling disc surface, and a plurality of one-level reduction gears are connected in the ring gear meshing respectively, and first transmission shaft installs in a surface that the first rolling disc deviates from a plurality of one-level reduction gears.

As a preferred embodiment: the driving device is a motor, a first driving gear is arranged on a rotating shaft of the motor, and the first driving gear is meshed with the plurality of first-stage reduction gears.

Drawings

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

Fig. 1 is a schematic perspective view of a connection mechanism of an electric pen-type screwdriver according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of the attachment mechanism of the electric pen-type screwdriver of FIG. 1;

FIG. 3 is an exploded view of the attachment mechanism shown in FIG. 1;

FIG. 4 is another angular exploded view of the attachment mechanism shown in FIG. 3;

FIG. 5 is an exploded view of the housing and drive device shown in FIG. 1;

FIG. 6 is another angular exploded view of the housing and drive device shown in FIG. 5;

fig. 7 is an exploded view of the transmission mechanism of fig. 1.

Wherein, each reference sign in the figure:

10. A housing; 11. a transmission mechanism; 111. a first-stage reduction gear set; 1111. a first rotating disc; 1112. a primary reduction gear; 112. a secondary reduction gear set; 1121. a second rotating disc; 1122. a second transmission gear; 1123. a secondary reduction gear; 113. three-stage speed reducing gear groups; 1131. a third rotating disc; 1132. a third transmission gear; 1133. a three-stage reduction gear; 114. a first drive shaft; 1141. the second limit plane; 12. a first baffle; 13. a second fitting collar; 14. a first substrate; 141. a first mounting boss; 15. an inner gear ring; 16. a first mounting notch;

20. A driving device; 21. a first drive gear;

30. A connecting mechanism; 31. a first fixing seat; 311. a spacing chamber; 312. a limit step; 313. a first fitting collar;

32. A rotating shaft module; 321. a first rotating shaft; 3211. a first shaft body; 3212. a second shaft body; 3213. the first limiting convex ring; 3214. the third limit plane; 3215. the first installation concave position; 322. a first connector; 3221. a first connection hole; 3222. the first limiting plane; 3223. a convex edge; 3224. and (3) a roller.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Referring to fig. 1 to 7, a connection mechanism of an electric pen-type screwdriver according to an embodiment of the application will be described. The connection mechanism of the electric pen-type screwdriver comprises: a housing 10, a driving device 20 and a connecting mechanism 30.

The transmission mechanism 11 is installed in the shell 10, the driving device 20 is installed at the top of the shell 10 and connected with the transmission mechanism 11, the connecting mechanism 30 is installed at the bottom of the shell 10, and when the driving device 20 works, the transmission mechanism 11 can be driven, the connecting mechanism 30 is driven to work through the transmission mechanism 11, and screwing and unscrewing are carried out. In the embodiment of the application, the bottom of the housing 10 is provided with the first baffle 12, the connecting mechanism 30 comprises a first fixed seat 31 arranged at the bottom of the housing 10 and a rotating shaft module 32 rotatably arranged on the first fixed seat 31, and the rotating shaft module 32 is connected with the transmission mechanism 11; after the first fixing seat 31 is installed at the bottom of the housing 10, the top of the rotating shaft module 32 abuts against the first baffle 12.

Specifically, by providing the first baffle 12 at the bottom of the housing 10, the transmission mechanism 11 can be limited by the first baffle 12; when the rotating shaft module 32 is mounted on the first fixing seat 31, the first fixing seat 31 can be vertically mounted at the bottom of the casing 10; the mounting mode is convenient for control the position of each part, and each part is difficult to drop in the mounting process, and the specific position of each part does not need to be maintained deliberately so as to be convenient for assembly. Meanwhile, the first baffle 12 is utilized to axially limit the transmission mechanism 11 and the rotating shaft module 32, so that the assembly precision among all the components is improved.

Referring to fig. 2 to fig. 4 together, in some embodiments of the application, the rotating shaft module 32 includes a first rotating shaft 321 rotatably mounted on the first fixing seat 31 and a first connecting piece 322 stacked on top of the first rotating shaft 321, the driving mechanism 11 is provided with a first driving shaft 114, and the first driving shaft 114 passes through the first baffle 12 and is connected with the first connecting piece 322. During operation, the first transmission shaft 114 rotates to sequentially drive the first connecting piece 322 and the first rotating shaft 321 to rotate, a first installation concave position 3215 for installing a screwdriver or a hexagonal wrench is arranged at the bottom of the first rotating shaft 321, and the screwdriver, the hexagonal wrench and the like are installed in the first installation concave position 3215, so that the screwdriver and the hexagonal wrench can be driven to rotate, and corresponding parts are screwed and unscrewed.

Specifically, the first connecting member 322 is provided with a first connecting hole 3221, the first connecting hole 3221 has at least a first limiting plane 3222, and the first transmission shaft 114 is provided with a second limiting plane 1141 adapted to the first limiting plane 3222. With this structure, the connecting mechanism 30 facilitates the insertion between the first rotation shaft 321 and the first transmission shaft 114 when assembled in the housing 10. Preferably, at least two flanges 3223 are disposed on a side surface of the first connecting member 322 facing the first rotating shaft 321, the two flanges 3223 are disposed at a circular interval at a central position of the first connecting member 322, and a roller 3224 is disposed between the two flanges 3223; the flange 3223 can extend to a side of the first shaft 321, and a top side surface of the first shaft 321 is provided with a third limiting plane 3214 for the roller 3224 to abut against.

Preferably, the first limiting plane 3222 of the first rotation shaft has three, each first limiting plane 3222 is arranged vertically, each adapted to one roller 3224, i.e. three rollers 3224 in total.

More specifically, the first fixing seat 31 has a limiting cavity 311, the limiting cavity 311 penetrates through the upper surface and the lower surface of the first fixing seat 31, and the limiting cavity 311 has a limiting step 312; the first rotating shaft 321 is provided with a first limiting convex ring 3213, and the first limiting convex ring 3213 abuts against the limiting step 312. The first rotating shaft 321 includes a first shaft body portion 3211 and a second shaft body portion 3212, a first limiting convex ring 3213 is disposed between the first shaft body portion 3211 and the second shaft body portion 3212, and a convex edge 3223 extends toward the first limiting convex ring 3213 and is located on the side of the second shaft body portion 3212.

When the connecting mechanism 30 is assembled, the first fixing seat 31 is firstly erected, then the first rotating shaft 321 is installed in the limiting cavity 311 from the top of the first fixing seat 31, and the first limiting convex ring 3213 is abutted against the upper surface of the limiting step 312 so as to limit the axial position of the first rotating shaft 321; this process can stabilize the position of the first shaft 321 without additionally applying a force to the first shaft 321 to define its specific position; furthermore, the rollers 3224 are placed on the upper surface of the first limiting convex ring 3213, and at this time, one roller 3224 is arranged corresponding to one third limiting plane 3214 of the first rotating shaft 321; finally, the first connecting piece 322 is installed in the limiting cavity 311, and the position of one roller 3224 is limited by the two convex edges 3223. Therefore, when the connecting mechanism 30 is assembled, the vertical installation can be adopted, and the installation of each component does not need to apply additional acting force to stabilize the position, so that the assembling convenience is improved.

As described above, the first fixing base 31 is provided with the first assembling protrusion 313 at the top, the second assembling protrusion 13 is provided at the bottom of the housing 10, and the first assembling protrusion 313 can be inserted into the inner side of the second assembling protrusion 13. When the first fixing seat 31 is mounted at the bottom of the housing 10, the first assembling convex ring 313 is inserted into the inner side surface of the second assembling convex ring 13, then the first transmission shaft 114 is inserted into the first connecting hole 3221 of the first connecting piece 322, and the first limiting plane 3222 abuts against the second limiting plane 1141, so that the first transmission shaft 114 rotates, and the first transmission shaft 321 rotates.

Referring to fig. 5 to 7, in other embodiments of the present application, the housing 10 has a first mounting chamber, the first mounting chamber penetrates through the top of the housing 10 to form a first opening, the first opening is provided with the first substrate 14, and the driving device 20 is fixedly mounted on the first substrate 14. Because the top of the shell 10 is provided with the first opening, when the transmission mechanism 11 is installed, the shell 10 can be directly placed vertically, the first opening faces upwards, the transmission mechanism 11 is directly installed in the first opening, and the transmission mechanism 11 installed in the first installation cavity is limited by the first baffle 12 at the bottom of the shell 10, so that the transmission mechanism 11 cannot fall down. In addition, the driving device 20 is installed by using the first substrate 14, and the driving device 20 is assembled by extending screws into the first installation cavity, so that the installation is more convenient. Preferably, the first substrate 14 is made of plastic material, so that vibration generated during operation of the driving device 20 can be reduced, the first substrate 14 can play a role in buffering and vibration reduction, and noise can be reduced. Furthermore, the first shutter 12 can limit the positions of the components between the connection mechanism 30 and the transmission mechanism 11, thereby improving the assembly accuracy of the respective components.

Specifically, the first substrate 14 has a first mounting protrusion 141, the top of the housing 10 is provided with a first mounting notch 16 into which the first mounting protrusion 141 is fitted, and after the first substrate 14 is mounted on the top of the housing 10, the first substrate 14 can cover the first opening, and the first mounting protrusion 141 is inserted into the first mounting notch 16. The first substrate 14 has a through hole penetrating the upper and lower surfaces thereof, and the driving device 20 is a motor, the rotating shaft of which can pass through the through hole to be connected with the transmission mechanism 11.

More specifically, the inner gear ring 15 is integrally formed on the surface of the first installation cavity, the transmission mechanism 11 is a speed reduction gear group, the speed reduction gear group at least comprises a first speed reduction gear group 111, the first speed reduction gear group 111 comprises a first rotating disc 1111 and a plurality of first speed reduction gears 1112 installed on one surface of the first rotating disc 1111, the plurality of first speed reduction gears 1112 are respectively engaged and connected with the inner gear ring 15, and the first transmission shaft 114 is installed on one surface of the first rotating disc 1111, which is away from the plurality of first speed reduction gears 1112. The rotating shaft of the motor is provided with a first driving gear 21, and the first driving gear 21 is in meshed connection with a plurality of primary reduction gears 1112.

In other embodiments of the present application, the transmission 11 further includes a secondary reduction gear set 112 and a tertiary reduction gear set 113; the secondary speed reduction gear group 112 comprises a second rotating disk 1121, a second transmission gear 1122 arranged on one surface of the second rotating disk 1121, and a plurality of secondary speed reduction gears 1123 arranged on one surface of the second rotating disk 1121, which is away from the second transmission gear 1122, wherein the second rotating disk 1121 is arranged at an upper-lower interval with the first rotating disk 1111, and the second transmission gear 1122 is in meshed connection with a plurality of primary speed reduction gears 1112; a plurality of secondary reduction gears 1123 are respectively engaged with the ring gear 15; the third-stage reduction gear set 113 comprises a third rotating disk 1131, a third transmission gear 1132 arranged on one surface of the third rotating disk 1131, and a plurality of third-stage reduction gears 1133 arranged on one surface of the third rotating disk 1131, which is far away from the third transmission gear 1132, wherein the third rotating disk 1131 and the second rotating disk 1121 are arranged at intervals up and down, the third transmission gear 1132 is in meshed connection with the plurality of second-stage reduction gears 1123, and the plurality of third-stage reduction gears 1133 are respectively in meshed connection with the inner gear ring 15; because the primary speed reducing gear set 111, the secondary speed reducing gear set 112 and the tertiary speed reducing gear set 113 are adopted, the first driving gear 21 is meshed with the plurality of tertiary speed reducing gears 1133, and the primary speed reducing gear set 113, the secondary speed reducing gear set 112, the primary speed reducing gear set 111 and the first connecting piece 322 are sequentially driven to rotate by driving the first driving gear 21 to rotate, so that the first rotating shaft 321 is driven to rotate.

Specifically, the primary reduction gear 1112, the secondary reduction gear 1123 and the tertiary reduction gear 1133 are three, and have more than triangular pitches; the first rotary disk 1111, the second rotary disk 1121, and the third rotary disk 1131 are each provided with a shaft body to which a primary reduction gear 1112, a secondary reduction gear 1123, and a tertiary reduction gear 1133 are mounted. The second drive gear 1122 is fixedly mounted to the second rotating disk 1121 and the third drive gear 1132 is fixedly mounted to the third rotating disk 1131.

When the transmission mechanism 11 and the driving device 20 are assembled, the first rotating disk 1111 is firstly installed in the shell 10, the first transmission shaft 114 extends downwards from the through hole of the first baffle plate 12 to protrude, the bottom of the first rotating disk 1111 is abutted against the first baffle plate 12, then the first rotating disk 1111 is installed with the first-stage reduction gear 1112, and at this time, the first-stage reduction gear 1112 can be in meshed connection with the annular gear 15; further, the second rotating disk 1121 is fitted into the housing 10, and the second rotating gear is brought into meshing connection with the plurality of primary reduction gears 1112, and then the second rotating disk 1121 is fitted with the secondary reduction gear 1123, at which time the secondary reduction gear 1123 can be brought into meshing connection with the ring gear 15; furthermore, the third rotating disk 1131 is installed in the casing 10, the third transmission gear 1132 is meshed with the plurality of secondary reduction gears 1123, then the third rotating disk 1131 is installed with the tertiary reduction gears 1133, and the tertiary reduction gears 1133 can be meshed with the annular gear 15; further, the driving device 20 is mounted on the first base plate 14, and after the first base plate 14 is mounted on the top of the housing 10, the first driving gear 21 can be engaged with the plurality of three-stage reduction gears 1133.

The foregoing description of the preferred embodiments of the present utility model has been provided for the purpose of illustrating the general principles of the present utility model and is not to be construed as limiting the scope of the utility model in any way. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model, and other embodiments of the present utility model as will occur to those skilled in the art without the exercise of inventive faculty, are intended to be included within the scope of the present utility model.

Claims (10)

1. A connection mechanism of an electric pen-type screwdriver comprises

A housing (10), wherein a transmission mechanism (11) is arranged in the housing (10);

the driving device (20) is arranged at the top of the shell (10) and is connected with the transmission mechanism (11);

The connecting mechanism (30), the said connecting mechanism (30) is installed in the bottom of the outer cover (10); the method is characterized in that: the bottom of the shell (10) is provided with a first baffle (12), the connecting mechanism (30) comprises a first fixed seat (31) arranged at the bottom of the shell (10) and a rotating shaft module (32) rotatably arranged on the first fixed seat (31), and the rotating shaft module (32) is connected with the transmission mechanism (11); after the first fixing seat (31) is arranged at the bottom of the shell (10), the top of the rotating shaft module (32) abuts against the first baffle plate (12).

2. The connection mechanism of the electric pen-type screwdriver according to claim 1, wherein: the rotating shaft module (32) comprises a first rotating shaft (321) rotatably arranged on the first fixing seat (31) and a first connecting piece (322) overlapped on the top of the first rotating shaft (321), the transmission mechanism (11) is provided with a first transmission shaft (114), and the first transmission shaft (114) penetrates through the first baffle plate (12) to be connected with the first connecting piece (322).

3. The connection mechanism of the electric pen-type screwdriver according to claim 2, wherein: the first connecting piece (322) is provided with a first connecting hole (3221), the first connecting hole (3221) is provided with at least a first limiting plane (3222), and the first transmission shaft (114) is provided with a second limiting plane (1141) which is matched with the first limiting plane (3222).

4. A connection mechanism for a powered pen screw driver according to claim 2 or 3, wherein: at least two convex edges (3223) are arranged on one side surface of the first connecting piece (322) facing the first rotating shaft (321), the two convex edges (3223) are arranged at a circular interval at the center position of the first connecting piece (322), and a roller (3224) is arranged between the two convex edges (3223); the convex edge (3223) can extend to the side of the first rotating shaft (321), and a third limiting plane for the roller (3224) to lean against is arranged on the top side surface of the first rotating shaft (321).

5. The connection mechanism of the electric pen-type screwdriver according to claim 4, wherein: the first fixing seat (31) is provided with a limiting cavity (311), the limiting cavity (311) penetrates through the upper surface and the lower surface of the first fixing seat (31), and the limiting cavity (311) is provided with a limiting step (312); the first rotating shaft (321) is provided with a first limiting convex ring (3213), and the first limiting convex ring (3213) abuts against the limiting step (312).

6. The connection mechanism of the electric pen type screwdriver according to claim 5, wherein: the first rotating shaft (321) comprises a first shaft body (3211) and a second shaft body (3212), a first limiting convex ring (3213) is arranged between the first shaft body (3211) and the second shaft body (3212), and a convex edge (3223) extends to the first limiting convex ring (3213) and is located on the side of the second shaft body (3212).

7. The connection mechanism of the electric pen-type screwdriver according to claim 1, wherein: the top of the first fixing seat (31) is provided with a first assembling convex ring (313), the bottom of the shell (10) is provided with a second assembling convex ring (13), and the first assembling convex ring (313) can be inserted into the inner side surface of the second assembling convex ring (13).

8. The connection mechanism of the electric pen-type screwdriver according to claim 1, wherein: the shell (10) is provided with a first installation cavity, a first opening is formed by penetrating through the top of the shell, a first substrate (14) is installed at the first opening, and the driving device (20) is fixedly installed on the first substrate (14).

9. The connection mechanism of the electric pen type screwdriver according to claim 8, wherein: the first installation cavity surface integrated into one piece has ring gear (15), and drive mechanism (11) are the speed reduction tooth group, and the speed reduction tooth group has one-level speed reduction tooth group (111) at least, and one-level speed reduction tooth group (111) are including first rolling disc (1111) and install in a plurality of one-level speed reduction gear (1112) of a surface of first rolling disc (1111), and a plurality of one-level speed reduction gear (1112) are connected in ring gear (15) meshing respectively, and first transmission shaft (114) are installed in a surface that first rolling disc (1111) deviates from a plurality of one-level speed reduction gear (1112).

10. The connection mechanism of the electric pen-type screwdriver according to claim 9, wherein: the driving device (20) is a motor, a first driving gear (21) is arranged on a rotating shaft of the motor, and the first driving gear (21) is meshed with a plurality of first-stage reduction gears (1112).