CN219504640U - Internal structure of electric screwdriver - Google Patents

Abstract

The utility model discloses an internal structure of an electric screwdriver, which comprises: the torque output device comprises a driving device, a planetary gear box, a torsion shaft sleeve and an output rotating shaft, wherein the driving device is clamped with one side of the outer part of the planetary gear box, the power output end of the driving device is in transmission connection with the inner part of the planetary gear box, one end of the output rotating shaft is in transmission connection with the inner part of the planetary gear box, a first plane bearing and a second plane bearing are respectively sleeved at two ends of the outer part of the output rotating shaft, the outer wall of the first plane bearing is abutted with the bottom of the inner wall of the planetary gear box, a torque regulator is sleeved outside a tool bit bayonet, one end of the torsion shaft sleeve extends into the torque regulator, the outer wall of the second plane bearing is abutted with the inner wall of the torque regulator, and a torsion spring is arranged between the torsion shaft sleeve and the torque regulator.

Description

Internal structure of electric screwdriver

Technical Field

The utility model relates to the technical field of electric screwdrivers, in particular to an internal structure of an electric screwdriver.

Background

The electric screwdriver is an electric tool for tightening and loosening screws, compared with a manual screwdriver, the electric tool is provided with a mechanism for adjusting and limiting torque, and the electric screwdriver is driven to rotate through a driving device without manual rotation, so that labor is saved, the working efficiency of tightening or loosening screws is improved, and the electric screwdriver is one of assembly tools with wide application.

The electric screwdriver drives the driving device to drive the screw sleeve head, but as the coaxiality error directly affects the matching precision and the service condition of the workpiece, the coaxiality error reflects the non-concentricity of the circle center on the section, namely the concentricity, and the concentricity error is the deviation degree of the circle center, so that the concentricity error of the screw sleeve head and the driving shaft is particularly important.

For example, chinese patent with publication number CN112959251B and patent name of "an electric screwdriver" discloses an electric screwdriver, and belongs to the technical field of electric tools. The torque output seat is provided with a contact type clutch structure. This contact structure can lead to the position of screw sleeve head and output shaft to appear the deviation owing to the structure that adopts contact separation and reunion at the in-process of pushing down screw sleeve head and output shaft to lead to screw sleeve head and output shaft's concentricity lower, the concentricity can lead to the screwdriver head to rock, thereby leads to screwdriver head and screw to skid, damages screwdriver head or nut easily, thereby produces that the product qualification rate is insufficient and influence work efficiency's problem appears.

In order to achieve the consistency of concentricity of the output rotating shaft and the transmission part, thereby achieving the effect of keeping stable torque output; therefore, how to solve the technical problem that needs to be solved by the current technicians to keep the concentricity consistent in the transmission process of the output rotating shaft.

Disclosure of Invention

The present utility model is directed to an internal structure of an electric screwdriver, which solves the above-mentioned problems of the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an internal structure of a power screwdriver, comprising:

the driving device, the planetary gear box, the torsion shaft sleeve and the output rotating shaft;

the driving device is clamped with one side of the outer part of the planetary gear box, the power output end of the driving device is in transmission connection with the inner part of the planetary gear box, one end of the output rotating shaft is in transmission connection with the inner part of the planetary gear box, the two ends of the outer part of the output rotating shaft are respectively sleeved with a first plane bearing and a second plane bearing, the outer wall of the first plane bearing is abutted with the bottom of the inner wall of the planetary gear box, and the outer part of the planetary gear box is sleeved with a torsion shaft sleeve;

the tool bit bayonet is offered to the other end of output pivot, just tool bit bayonet outside cover is equipped with the torsion adjuster, the one end of torsion axle sleeve extends to the torsion adjuster inside, just the outer wall of second plane bearing with the inner wall looks butt of torsion adjuster, be provided with torsion spring between torsion axle sleeve and the torsion adjuster.

Preferably, the inside bottom side of torsion axle sleeve is provided with the buffering and supports the piece, the buffering is supported the piece cover and is located the outside of output pivot, just the outside both sides of buffering support the piece all extend outward and are provided with spacing post, the inside ball that is provided with of one end of spacing post, the outside opposite side of planetary gear box is seted up flutedly, the inside card of recess is equipped with the roller, roller and ball looks butt.

Preferably, the other end of the limiting post extends to the outside of the torsion shaft sleeve, and the other end of the limiting post is abutted with one end of the torsion spring.

Preferably, a driving gear and a driven gear are arranged in the planetary gear box, a power output end of the driving device extends to the inside of the driving gear, the driven gear is meshed with the outside of the driving gear, teeth are arranged on the inner wall of the planetary gear box, and the driven gear is meshed with the teeth.

Preferably, annular washers are arranged at two ends of the torsion spring, one end of the torsion spring is abutted against the torsion shaft sleeve, and the other end of the torsion spring is abutted against the torsion regulator.

Preferably, the outside cover of tool bit bayonet socket is equipped with compresses tightly the pullover, tool bit bayonet socket outside cover is established compression spring and locking ring respectively, compression spring and locking ring looks butt.

Preferably, threads are uniformly distributed on the outer wall of one end of the torsion shaft sleeve, and one end of the torsion shaft sleeve extends to the interior of the torsion regulator and is in threaded connection with the inner wall of the torsion regulator.

Preferably, a limiting clamping groove is formed in one side of the driving device, a locking clamping block is arranged on one side of the outer portion of the planetary gear box, and the limiting clamping groove is fixedly connected with the locking clamping block.

Preferably, the power output end of the driving device is clamped with the middle part of one side of the driving gear, and the middle part of the other side of the driving gear is clamped with the output rotating shaft.

Preferably, one end of the output rotating shaft is provided with a clamping connector, and the clamping connector is clamped with one side of the planetary gear box.

Compared with the prior art, the utility model provides the internal structure of the electric screwdriver, which has the beneficial effects that: the first plane bearing that effectual through the outside cover of output pivot was equipped with keeps planetary gear box transmission to output pivot in-process transmission stable to increase the concentricity of output pivot and planetary gear box, wherein, the other end and the torque regulator transmission stability of output pivot are kept through the second plane bearing, the transmission of output pivot is stable, the effectual concentricity that reaches is kept unanimous, make planetary gear box and output pivot's concentricity unanimous, the effect of output pivot and torque regulator's concentricity unanimous reaches the effect that torque output is more stable, the transmission of output pivot is kept stable, less because the unstable screw that leads to damages the condition that the product is unqualified appears.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, 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 utility model, 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 view of the overall external structure of the present utility model.

Fig. 2 is a schematic diagram of the structure of the output shaft and the compression sleeve of the present utility model.

Fig. 3 is a schematic view of the internal structure of the planetary gear box of the present utility model.

Fig. 4 is a schematic view of the other side structure of the planetary gear box of the present utility model.

Fig. 5 is a schematic view of the overall internal structure of the present utility model.

Fig. 6 is a schematic view of a buffering block structure of the present utility model.

Fig. 7 is a schematic view of the external structure of the torsion sleeve of the present utility model.

Fig. 8 is a schematic view of the interior of the torsion sleeve and the first planar bearing structure of the present utility model.

Fig. 9 is a schematic view of the compression spring and locking ring structure of the present utility model.

Fig. 10 is a schematic diagram of a limiting slot structure of the driving device of the present utility model.

The labels in the figures are shown in combination: 1. a driving device; 2. a planetary gear box; 3. a torsion shaft sleeve; 4. an output shaft; 5. a torsion adjuster; 6. a torsion spring; 7. compressing the sleeve head; 11. a limit clamping groove; 12. locking the clamping block; 20. a groove; 21. a drive gear; 22. a driven gear; 23. teeth; 31. buffering the block; 32. a limit column; 33. a ball; 40. a clamping joint; 41. a first planar bearing; 42. a second planar bearing; 43. a cutter head bayonet; 61. a circular ring gasket; 71. locking the circular ring; 72. a compression spring; 201. and (3) a roller.

Detailed Description

Preferred embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present utility model have been illustrated in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein, but rather, these embodiments are provided so that this utility model will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

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.

In the description of the present utility model, it should be understood that the terms "thickness," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model; 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, the definition of "first", "second" is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly including one or more such features.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes the technical scheme of the embodiment of the present utility model in detail with reference to the accompanying drawings.

Referring to fig. 1 to 10, an internal structure of a power screwdriver includes: the driving device 1, the planetary gear box 2, the torsion shaft sleeve 3 and the output rotating shaft 4;

the driving device 1 is clamped with one side of the outer part of the planetary gear box 2, the power output end of the driving device 1 is in transmission connection with the inner part of the planetary gear box 2, one end of the output rotating shaft 4 is in transmission connection with the inner part of the planetary gear box 2, the two outer ends of the output rotating shaft 4 are respectively sleeved with a first plane bearing 41 and a second plane bearing 42, the outer wall of the first plane bearing 41 is propped against the bottom of the inner wall of the planetary gear box 2, and the outer part of the planetary gear box 2 is sleeved with a torsion shaft sleeve 3;

the tool bit bayonet 43 has been seted up to the other end of output pivot 4, just tool bit bayonet 43 outside cover is equipped with torsion adjuster 5, torsion axle sleeve 3's one end extends to torsion adjuster 5 inside, just second plane bearing 42's outer wall with torsion adjuster 5's inner wall looks butt, be provided with torsion spring 6 between torsion axle sleeve 3 and the torsion adjuster 5.

Specifically, the inside bottom side of torsion axle sleeve 3 is provided with the buffering and supports piece 31, the buffering is supported the piece 31 cover and is located the outside of output pivot 4, just the outside both sides of buffering is supported piece 31 all extend outward and is provided with spacing post 32, the inside ball 33 that is provided with of one end of spacing post 32, the recess 20 has been seted up to the outside opposite side of planetary gear box 2, the inside card of recess 20 is equipped with roller 201, roller 201 and ball 33 looks butt.

Specifically, the other end of the limiting post 32 extends to the outside of the torsion shaft sleeve 3, and the other end of the limiting post 32 abuts against one end of the torsion spring 6.

Specifically, the planetary gear box 2 is internally provided with a driving gear 21 and a driven gear 22, the power output end of the driving device 1 extends to the inside of the driving gear 21, the driven gear 22 is meshed with the outside of the driving gear 21, the inner wall of the planetary gear box 2 is provided with teeth 23, and the driven gear 22 is meshed with the teeth 23.

Specifically, annular washers 61 are disposed at both ends of the torsion spring 6, one end of the torsion spring 6 abuts against the torsion shaft sleeve 3, and the other end of the torsion spring 6 abuts against the torsion regulator 5.

Specifically, the outside of the tool bit bayonet 43 is sleeved with a pressing sleeve head 7, the outside of the tool bit bayonet 43 is sleeved with a pressing spring 72 and a locking circular ring 71 respectively, and the pressing spring 72 is abutted against the locking circular ring 71.

Specifically, threads are uniformly distributed on the outer wall of one end of the torsion shaft sleeve 3, and one end of the torsion shaft sleeve 3 extends into the torsion regulator 5 and is in threaded connection with the inner wall of the torsion regulator 5.

Specifically, a limit clamping groove 11 is formed in one side of the driving device 1, a locking clamping block 12 is arranged on one side of the outer portion of the planetary gear box 2, and the limit clamping groove 11 is fixedly connected with the locking clamping block 12.

Specifically, the power output end of the driving device 1 is clamped with the middle part inside one side of the driving gear 21, and the middle part inside the other side of the driving gear 21 is clamped with the output rotating shaft 4.

Specifically, one end of the output shaft 4 is provided with a clamping connector 40, and the clamping connector 40 is clamped with one side of the planetary gear box 2.

Example 1

In this embodiment, in order to achieve the concentricity of the internal structure, in the use process, in order to increase the rotation speed and increase the rotation frequency of the screw sleeve head, thereby leading to loosening of the internal components of the screw driver, deviation occurs between the screw sleeve head and the output shaft, loosening of the connection between the output shaft 4 and the transmission component causes unstable transmission output, the concentricity of the internal structure is lower, the lower concentricity can lead to shaking of the screw driver head, thereby leading to slipping of the screw driver head and the screw, and easy damage to the screw driver head or the nut, thereby resulting in insufficient product yield and influencing the working efficiency, and referring to fig. 1 to 10, this embodiment comprises: the driving device 1, the planetary gear box 2, the torsion shaft sleeve 3 and the output rotating shaft 4; because one side of the outer part of the planetary gear box 2 is clamped, the power output end of the driving device 1 is in transmission connection with the inner part of the planetary gear box 2, the planetary gear box 2 is driven to rotate by the driving device 1, one end of the output rotating shaft 4 is in transmission connection with the inner part of the planetary gear box 2, the output rotating shaft 4 is driven by the planetary gear box 2, wherein the two outer ends of the output rotating shaft 4 are respectively sleeved with a first plane bearing 41 and a second plane bearing 42, and the outer wall of the first plane bearing 41 is propped against the bottom of the inner wall of the planetary gear box 2, so that the transmission stability in the process of transmitting the planetary gear box 2 to the output rotating shaft 4 is maintained, the concentricity of one end of the output rotating shaft 4 is improved, and the outer part of the planetary gear box 2 is sleeved with a torsion shaft sleeve 3; the other end of the output rotating shaft 4 is provided with a tool bit bayonet 43, a torsion regulator 5 is sleeved outside the tool bit bayonet 43, one end of the torsion shaft sleeve 3 extends into the torsion regulator 5,

the outer wall of the second plane bearing 42 is abutted against the inner wall of the torsion adjuster 5, the transmission stability of the other end of the output rotating shaft 4 is kept through the second plane bearing 42, and the two ends of the output rotating shaft 4 are effectively sleeved through the first plane bearing 41 and the second plane bearing 42, so that the two end parts of the output rotating shaft 4 are stably transmitted with the output rotating shaft 4, and the concentricity of the output rotating shaft 4 and the two end parts of the output rotating shaft 4 is effectively improved.

Example two

In this embodiment, in order to reduce the friction between the output shaft 4 and the planetary gear box 2 during the pressing process, in the electric screwdriver using pressing process, since the tool bit bayonet 43 at one end of the output shaft 4 abuts against the screw, and the contact friction between the other end of the output shaft 4 and the planetary gear box 2 is increased after the output shaft 4 is stressed, referring to fig. 1 to 10, this embodiment includes: the driving device 1, the planetary gear box 2, the torsion shaft sleeve 3 and the output rotating shaft 4; the driving device 1 is clamped with one side of the outer part of the planetary gear box 2, the power output end of the driving device 1 is in transmission connection with the inner part of the planetary gear box 2, the planetary gear box 2 is effectively driven by the driving device 1, one end of the output rotating shaft 4 is in transmission connection with the inner part of the planetary gear box 2, the planetary gear box 2 is driven by the output rotating shaft 4, a first plane bearing 41 and a second plane bearing 42 are respectively sleeved at two ends of the outer part of the output rotating shaft 4, the transmission stability of the output rotating shaft 4 is kept, and the concentricity of the output rotating shaft 4 and the inner structure is kept consistent, and as the outer wall of the first plane bearing 41 is propped against the bottom of the inner wall of the planetary gear box 2, a torsion shaft sleeve 3 is sleeved outside the planetary gear box 2; the other end of the output rotating shaft 4 is provided with a tool bit bayonet 43, a torsion adjuster 5 is sleeved outside the tool bit bayonet 43, one end of the torsion shaft sleeve 3 extends into the torsion adjuster 5,

the outer wall of the second plane bearing 42 is abutted against the inner wall of the torsion regulator 5, a torsion spring 6 is arranged between the torsion shaft sleeve 3 and the torsion regulator 5, and the torsion spring 6 improves the damping and buffering effects, so that the problem that the components are loosened due to overlarge vibration amplitude and the position of the output rotating shaft 4 is solved.

It should be noted that, the bottom side of the interior of the torsion shaft sleeve 3 is provided with a buffer abutment block 31, the buffer abutment block 31 is sleeved outside the output shaft 4, both sides of the exterior of the buffer abutment block 31 extend outwards to form a limit post 32, one end of the limit post 32 is internally provided with a ball 33, the other side of the exterior of the planetary gear box 2 is provided with a groove 20, a roller 201 is clamped inside the groove 20, the roller 201 is abutted with the ball 33, wherein the other end of the limit post 32 extends outside the torsion shaft sleeve 3, and the other end of the limit post 32 is abutted with one end of the torsion spring 6; the two ends of the limiting post 32 are respectively abutted against the groove 20 of the planetary gear box 2 and the abutting torsion spring 6, and in the pressing process, as the buffer abutting block 31 is sleeved outside the output rotating shaft 4, the buffer abutting block 31 plays a limiting role on the output rotating shaft 4 and is in point-to-point contact with the ball 33 through the roller 201, so that the contact area is reduced, and the friction force is reduced.

Example III

In this embodiment, for realizing stable power transmission and torque increase of the internal structure of the screwdriver, because the driving device 1 has higher power in the use process to drive the output rotating shaft 4 to rotate at too high speed, the transmission ratio is increased accordingly, so that unstable power transmission can occur, the problem that the too high speed affects the output torque occurs, and referring to fig. 1 to 10, the structure comprises: the driving device 1, the planetary gear box 2, the torsion shaft sleeve 3 and the output rotating shaft 4; because drive arrangement 1 and the outside one side looks joint of planetary gear box 2, through the power take off end and the inside transmission connection of planetary gear box 2 of drive arrangement 1, effectually drive planetary gear box 2 through drive arrangement 1, the one end and the inside transmission connection of planetary gear box 2 of output pivot 4 drive planetary gear box 2 through output pivot 4.

It should be noted that the planetary gear box 2 is internally provided with a driving gear 21 and a driven gear 22, the power output end of the driving device 1 extends into the driving gear 21, the driving device 1 drives the driving gear 21 to rotate, wherein the driven gear 22 is meshed with the driving gear 21, the driven gear 22 is driven to rotate by the driving gear 21, and the driven gear 22 is meshed with the teeth 23 due to the arrangement of the teeth 23 on the inner wall of the planetary gear box 2, so that the planetary gear box 2 is driven to revolve by the driven gear 22; through the driving gear 21 and the driven gear 22 in the planetary gear box 2, the driven gear 22 drives the planetary gear box 2 to revolve, so that the effects of reducing the transmission ratio and increasing the torsion are achieved, the stable power transmission is effectively maintained, and the bearing capacity is improved.

It should be noted that the power output end of the driving device 1 is clamped with the middle inside one side of the driving gear 21, and the middle inside the other side of the driving gear 21 is clamped with the output rotating shaft 4; the driving gear 21 is driven by the power output end of the driving device 1, so that the output rotating shaft 4 is driven to rotate by the driving gear 21, and the power output end of the driving device 1 is clamped with one side inner middle of the driving gear 21, and the other side inner middle of the driving gear 21 is clamped with the output rotating shaft 4, so that the structure with the same axis is achieved, and concentricity is maintained in the process of driving the planetary gear box 2 and the output rotating shaft 4 to rotate by the power output of the driving device 1.

In order to prevent unstable transmission caused by overlarge vibration amplitude, circular ring gaskets 61 are arranged at two ends of the torsion spring 6, the torsion spring 6 is convenient to install through the circular ring gaskets 61, the force applied to two ends of the torsion spring 6 is increased, one end of the torsion spring 6 is abutted against the torsion shaft sleeve 3, and the other end of the torsion spring 6 is abutted against the torsion regulator 5; the torsion spring 6 plays a role in damping and buffering, and the influence on concentricity caused by shaking of internal parts due to overlarge vibration amplitude is prevented. It should be noted that, in order to facilitate the adjustment of the torque force, the tool bit bayonet 43 is externally sleeved with a compression sleeve 7, the tool bit bayonet 43 is externally sleeved with a compression spring 72 and a locking ring 71, and the compression spring 72 is abutted against the locking ring 71.

In summary, the examples result in: the first plane bearing 41 that effectual outside cover through output pivot 4 was equipped with is to keeping the transmission of planetary gear box 2 to output pivot 4 in-process stable to increase the concentricity of output pivot 4 and planetary gear box 2, wherein, keep the other end and the torque regulator 5 transmission stability of output pivot 4 through second plane bearing 42, keep the transmission of output pivot 4 stable, effectually reach and keep the concentricity, make the concentricity of planetary gear box 2 and output pivot 4 unanimous, the effect of output pivot 4 and torque regulator 5 concentricity unanimous reaches the effect that torque output is more stable.

The aspects of the present utility model have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments. Those skilled in the art will also appreciate that the acts and modules referred to in the specification are not necessarily required for the present utility model. In addition, it can be understood that the steps in the method of the embodiment of the present utility model may be sequentially adjusted, combined and pruned according to actual needs, and the modules in the device of the embodiment of the present utility model may be combined, divided and pruned according to actual needs.

The foregoing description of embodiments of the utility model has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. An internal structure of an electric screwdriver, comprising:

the driving device, the planetary gear box, the torsion shaft sleeve and the output rotating shaft;

the driving device is clamped with one side of the outer part of the planetary gear box, the power output end of the driving device is in transmission connection with the inner part of the planetary gear box, one end of the output rotating shaft is in transmission connection with the inner part of the planetary gear box, the two ends of the outer part of the output rotating shaft are respectively sleeved with a first plane bearing and a second plane bearing, the outer wall of the first plane bearing is abutted with the bottom of the inner wall of the planetary gear box, and the outer part of the planetary gear box is sleeved with a torsion shaft sleeve;

the tool bit bayonet is offered to the other end of output pivot, just tool bit bayonet outside cover is equipped with the torsion adjuster, the one end of torsion axle sleeve extends to the torsion adjuster inside, just the outer wall of second plane bearing with the inner wall looks butt of torsion adjuster, be provided with torsion spring between torsion axle sleeve and the torsion adjuster.

2. The internal structure of an electric screwdriver according to claim 1, wherein a buffer supporting block is arranged at the bottom side of the interior of the torsion shaft sleeve, the buffer supporting block is sleeved outside the output rotating shaft, two sides of the exterior of the buffer supporting block are provided with limiting columns in an outward extending mode, one end of each limiting column is internally provided with a ball, the other side of the exterior of the planetary gear box is provided with a groove, a roller is clamped inside the groove, and the roller is abutted against the ball.

3. The internal structure of an electric screwdriver according to claim 2, wherein the other end of the limiting post extends to the outside of the torsion shaft sleeve, and the other end of the limiting post abuts against one end of the torsion spring.

4. The internal structure of an electric screwdriver according to claim 1, wherein a driving gear and a driven gear are arranged in the planetary gear box, a power output end of the driving device extends to the inside of the driving gear, the driven gear is meshed with the outside of the driving gear, teeth are arranged on the inner wall of the planetary gear box, and the driven gear is meshed with the teeth.

5. The internal structure of an electric screwdriver according to claim 1, wherein annular washers are provided at both ends of the torsion spring, one end of the torsion spring is abutted against the torsion shaft sleeve, and the other end of the torsion spring is abutted against the torsion adjuster.

6. The internal structure of an electric screwdriver according to claim 1, wherein a compression sleeve is sleeved outside the tool bit bayonet, a compression spring and a locking ring are sleeved outside the tool bit bayonet respectively, and the compression spring is abutted with the locking ring.

7. The internal structure of the electric screwdriver according to claim 1, wherein threads are uniformly distributed on an outer wall of one end of the torsion shaft sleeve, and one end of the torsion shaft sleeve extends into the torsion regulator and is in threaded connection with an inner wall of the torsion regulator.

8. The internal structure of an electric screwdriver according to claim 1, wherein a limit clamping groove is formed in one side of the driving device, a locking clamping block is arranged on one side of the outer portion of the planetary gear box, and the limit clamping groove is fixedly connected with the locking clamping block.

9. The internal structure of an electric screwdriver according to claim 4, wherein the power output end of the driving device is engaged with an inner middle of one side of the driving gear, and an inner middle of the other side of the driving gear is engaged with the output shaft.

10. The internal structure of an electric screwdriver according to claim 1, wherein one end of the output shaft is provided with a clamping connector, and the clamping connector is clamped with one side of the planetary gear box.