CN220825930U

CN220825930U - Electric screw driver

Info

Publication number: CN220825930U
Application number: CN202322156833.4U
Authority: CN
Inventors: 夏燃燃; 许庭欣
Original assignee: Shenzhen Xingfuxin Hardware Co ltd
Current assignee: Shenzhen Xingfuxin Hardware Co ltd
Priority date: 2023-08-11
Filing date: 2023-08-11
Publication date: 2024-04-23
Anticipated expiration: 2033-08-11

Abstract

The utility model discloses an electric screwdriver, which comprises a power mechanism and further comprises: the transmission mechanism comprises a transmission gear, and is connected with the output end of the power mechanism and can perform speed reduction transmission; the actuating mechanism comprises an output shaft and is used for outputting power; the stop mechanism is connected between the transmission mechanism and the execution mechanism, so that the electric screwdriver can realize self-locking stop; the gear ring shell is made of wear-resistant materials and comprises a shell part and a gear ring part, and the gear ring part is meshed with the transmission mechanism; and the stop shell is detachably connected with the gear ring shell and is used for protecting the stop mechanism. Through the ring gear casing and the locking casing of dismantling the connection with the casing split for the shell, wherein the ring gear casing adopts wear-resisting material preparation, and the locking casing adopts general material preparation to reduce the wearing and tearing of casing and reduced manufacturing cost again, simultaneously, two parts separately make, can dismantle the connection, change more conveniently when damaging, and the cost is lower.

Description

Electric screw driver

Technical Field

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

Background

Screwdrivers are a common tool for removing threaded connectors, which are rotatably secured or removed. With the development of automation technology and the improvement of production efficiency requirements, the electric screw driver is widely applied and becomes one of the necessary tools for disassembling and assembling screw parts.

A motorized screwdriver typically includes a motor, a control module, and a screwdriver bit. The screwdriver bit is a basic component of the electric screwdriver and is used for disassembling and assembling the threaded connecting piece. The motor drives the screwdriver bit to rotate, thereby tightening or loosening the threaded connection. The control module can control the rotating speed and the rotating torque of the motor so as to adapt to the disassembly and assembly of different threaded pieces and meet different application scenes.

Chinese patent No. 217801418U discloses an electric screwdriver, which comprises an output shaft, a housing, a stop ring, a stop block, a plurality of PIN columns, a power output disc, a transmission device and a motor, wherein the housing and the stop ring are integrally formed, the stop ring is positioned at the front end of the interior of the housing, the stop block is positioned in the stop ring, the rear end of the output shaft passes through the front end of the housing to penetrate through the stop block, a plurality of first lugs are arranged at intervals on the outer side of the stop block, a plurality of second lugs are arranged at the front end of the power output disc, the second lugs are positioned between the inner side of the stop ring and the outer side of the stop block, the PIN columns are positioned between the first lugs and the second lugs, and the motor is connected with the rear end of the power output disc through the transmission device. The utility model does not need to carry out the assembly work of the stop ring; and the stop ring is integrated into one piece with the casing, can greatly reduced appear the unstable risk of stop ring assembly after long-time use.

However, the housing of said utility model is formed as one body, and has a gear engaged with the transmission device, and said housing is usually made of plastic material, so that it is easy to cause internal defect after long-term operation, and its cost is too high.

Disclosure of utility model

In order to solve the problem that the existing electric screwdriver shell is easy to be damaged, the utility model provides an electric screwdriver with a detachable shell.

The following is a specific technical scheme for realizing the utility model:

An electric screwdriver, comprising a power mechanism, further comprising:

The transmission mechanism comprises a transmission gear, and is connected with the output end of the power mechanism and can perform speed reduction transmission;

The actuating mechanism comprises an output shaft and is used for outputting power;

The stop mechanism is connected between the transmission mechanism and the execution mechanism, so that the electric screwdriver can realize self-locking stop;

The gear ring shell is made of wear-resistant materials and comprises a shell part and a gear ring part, and the gear ring part is meshed with the transmission mechanism;

and the stop shell is detachably connected with the gear ring shell and is used for protecting the stop mechanism.

Further, the wear-resistant material can be metal, preferably high manganese steel, and the material of the stop shell is plastic.

Further, the gear ring shell is in snap connection with the stop shell.

As a preferred implementation mode, one of the gear ring shell and the stop shell is provided with a clamping groove, the other one is provided with a clamping block, the clamping groove is provided with a recess, the clamping block is provided with a protrusion, and the recess and the protrusion can be in clamping fit.

Further, the clamping groove is formed in the stop shell, the clamping block is arranged on the gear ring shell and comprises an inlet, a clamping position and a clamping block, the recess is formed in the clamping block, the clamping block is fixedly connected with the stop shell and has certain elasticity, and elastic deformation can be carried out.

The connecting structure is simple and reliable, and convenient to assemble and disassemble.

As a preferred embodiment, the stopping mechanism comprises a power output disc connected with the transmission mechanism, a stopping ring is connected to the power output disc, a plurality of first protruding blocks are arranged on the power output disc at intervals, a plurality of grooves are correspondingly formed in the stopping ring, and the first protruding blocks are embedded in the grooves; an accommodating space is reserved between the power output disc and the stop ring, a stop block is placed in the accommodating space, a plurality of second protruding blocks are arranged on the outer side of the stop block at intervals, a gap is reserved between the first protruding block and the second protruding block, and a PIN column is placed in the gap.

Further, the transmission mechanism comprises an input shaft, a first planetary gear train, a second planetary gear train and a third planetary gear train which are sequentially arranged in parallel in a linkage mode, the third planetary gear train is connected with the power output disc, and the input shaft is connected with the power mechanism.

Further, the first planetary gear train comprises a first sun gear connected with the input shaft, a plurality of first planetary gears meshed with the first sun gear, and the first planetary gears are mounted on a first planetary carrier;

The first planet carrier is fixedly provided with a second sun gear, a plurality of second planet gears are meshed with the second sun gear, and the second planet gears are arranged on the second planet carrier;

A third sun gear is fixedly arranged on the second planet carrier, a plurality of third planet gears are meshed with the third sun gear, and the third planet gears are arranged on the power output disc;

The first planet wheel, the second planet wheel and the third planet wheel are meshed with a gear ring part on the gear ring shell.

As a preferred embodiment, the output shaft is provided with a mounting groove for mounting the screwdriver bit, and the mounting groove is internally provided with an adsorption device.

Preferably, the adsorption device may be a magnet.

Preferably, the adsorption device may be an electromagnetic coil connected with a power supply and capable of controlling on-off.

Compared with the prior art, the utility model has the beneficial effects that: the shell is split into the gear ring shell and the stop shell which are connected in a shell disassembling mode, the gear ring shell with the gear ring which is required to be meshed with the transmission mechanism is made of wear-resistant materials, and the stop shell is made of common materials, so that abrasion of the shell is reduced, manufacturing cost is reduced, meanwhile, the two parts are manufactured separately, the detachable connection is achieved, replacement is more convenient when the detachable connection is damaged, and cost is lower.

Drawings

FIG. 1 is a schematic diagram of a specific structure of the present utility model;

FIG. 2 is a schematic view of the installation of the ring gear housing and the stop housing of the present utility model;

FIG. 3 is an exploded view of the assembly of the ring gear housing and the stop housing of the present utility model;

FIG. 4 is a schematic view of a stop mechanism of the present utility model;

Fig. 5 is a schematic view of the transmission mechanism of the present utility model.

Detailed Description

The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, 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 relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be 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 communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, the utility model discloses an electric screwdriver, which comprises a power mechanism 1, wherein the power mechanism 1 is a motor, and is characterized by further comprising:

the transmission mechanism 3 comprises a transmission gear, and the transmission mechanism 3 is connected with the output end of the power mechanism 1 and can perform speed reduction transmission;

An actuator 6, the actuator 6 including an output shaft 61 for outputting power;

the stop mechanism 4 is connected between the transmission mechanism 4 and the actuating mechanism 6, so that the electric screwdriver can realize stop;

A gear ring housing 2 made of wear-resistant material, comprising a housing portion 23 and a gear ring portion 22, wherein the gear ring portion 22 is meshed with the transmission mechanism 3;

A stop housing 5 detachably connected to the ring gear housing 2 for protecting the stop mechanism 4.

As shown in fig. 2 and 3, the gear ring housing 2 and the stop housing 5 are in snap connection.

Further, one of the gear ring housing 2 and the stop housing 5 is provided with a clamping groove 51, the other is provided with a clamping block 21, the clamping groove 51 is provided with a recess 511, the clamping block 21 is provided with a protrusion 211, and the recess 511 and the protrusion 211 can be in clamping fit.

Further, the locking groove 51 is disposed on the stop housing 5, the locking block 21 is disposed on the ring gear housing 2, the locking groove 51 includes an inlet 512, a locking position 513 and a locking block 514, the recess 511 is disposed on the locking block 514, and the locking block 514 is fixedly connected with the stop housing 5, and has a certain elasticity and can be elastically deformed.

Further, the protrusion 211 is semi-cylindrical, and correspondingly, the recess 511 is also a semi-cylindrical recess, and the size of the recess 511 is greater than or equal to the protrusion 211.

Further, when the width of the inlet 512 is greater than or equal to the width of the clamping block 21, and the ring gear housing 2 and the stop housing 5 are assembled together, after the ring gear housing 2 is aligned with the stop housing 5, the clamping block 21 on the ring gear housing 2 is plugged into the clamping groove 51 from the inlet 512, then the ring gear housing 2 and the stop housing 5 are relatively rotated to enable the clamping block 21 to enter the clamping position 513, in the process, the protrusion 211 enables the clamping block 514 to elastically deform upwards, so that the clamping block 21 smoothly enters the clamping position 513, and when the protrusion 211 reaches the position of the recess 511, the clamping block 514 returns to the original shape, so that the clamping block 21 and the clamping groove 51 form clamping fit, and the assembly is completed; the clamping block 514 only needs to be deformed during disassembly, so that the clamping block 21 is loosened for disassembly.

As shown in fig. 4, the stopping mechanism 4 includes a power output disc 41 connected with the transmission mechanism 3, a stopping ring 42 is connected to the power output disc 41, a stopping block 421 is disposed in the stopping ring 42, a plurality of first protrusions 422 are disposed at intervals on the outer side of the stopping block, a plurality of grooves 424 are formed between the first protrusions and the stopping ring, two PIN posts 423 are movably disposed in each groove 424, the two PIN posts 423 are respectively located at two ends of the grooves 424, a gap is left between the two PIN posts 423, a plurality of second protrusions 411 are disposed on the power output disc 41 at intervals, and the second protrusions 411 are inserted into the gap between the two PIN posts 423, so that connection is formed between the power output disc 41 and the stopping ring 42.

A plurality of third protruding blocks 425 are arranged on the stop ring 42 at intervals, a plurality of second grooves 52 are correspondingly arranged on the stop shell 5, and the third protruding blocks 425 are embedded in the second grooves 52, so that the stop ring 42 and the stop shell 5 cannot rotate relatively.

The working process of the stop mechanism is as follows: the transmission mechanism 1 drives the power output disc 41 to rotate through a transmission device; the second bump 411 of the power output disc 41 pushes the PIN post 423 to move, the PIN post 423 further contacts the first bump 422 of the stop block 421 to enable the stop block 421 to rotate, and the stop block 421 can drive the output shaft 61 to rotate and output. In the driving process, the angle at which the power output disc 41 contacts the PIN 423 is the driving angle, that is, the power output disc 41 rotates by the driving angle, and the stop block 421 can be carried to rotate.

When the electric screwdriver performs self-locking, the output shaft 61 is manually rotated, the output shaft 61 further drives the stop block 421 to rotate, and further, the first bump 422 of the stop block 421 pushes the PIN 423 to move and touch the second bump 411 of the power output disc 41, in the process, the angle at which the PIN 423 touches the power output disc 41 is a self-locking angle, and it is understood that the self-locking angle < driving angle, that is, when in a self-locking state, the stop block 421 rotates by the magnitude of the driving angle, the power output disc 41 can be driven to rotate, but the self-locking stop is generated in the state because of the self-locking angle < driving angle.

The transmission mechanism 3 comprises an input shaft 34, a first planetary gear system 31, a second planetary gear system 32 and a third planetary gear system 33 which are sequentially arranged in parallel in a linkage mode, the third planetary gear system 33 is connected with a power output disc 41, and the input shaft 34 is connected with the power mechanism 1.

The first planetary gear train 31, the second planetary gear train 32 and the third planetary gear train 33 are the transmission gears.

The first planetary gear system 31 includes a first sun gear 311 connected to an input shaft, a plurality of first planetary gears meshed with the first sun gear, and the first planetary gears are mounted on a first planet carrier;

The power output disc 41 is fixedly provided with a plurality of planetary shafts 412 for mounting a third planetary gear, so that the third planetary gear can drive the power output disc to rotate.

Through multistage planetary gear train, realize higher speed reduction ratio to the rotational speed of power output dish is slower than the rotational speed of motor more, but the torsion of chuck is very big, thereby has improved electric screw driver's work efficiency.

The output shaft is provided with a mounting groove for mounting the screwdriver bit, and an adsorption device is arranged in the mounting groove.

The shape of the mounting groove can be various shapes such as hexagon, circle, quincuncial, etc. so as to be provided with screwdriver heads of different models.

As a preferred embodiment, the adsorption means may be a magnet. By arranging the magnet in the mounting groove as adsorption, the reliability of assembly is improved.

As another preferred embodiment, the adsorption device may also be an electromagnetic coil which is connected with a power supply and can control on-off. Through setting up controllable break-make's solenoid, connect the stability that the power improves the installation when installing the tool bit, thereby make solenoid break off power lose magnetic force when dismantling, convenient to detach.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. An electric screwdriver, including power unit, its characterized in that still includes:

2. The powered screwdriver of claim 1 wherein the gear ring housing is a snap-fit connection with the stop housing.

3. The electric screwdriver as claimed in claim 2, wherein one of the gear ring housing and the stopper housing is provided with a locking groove, the other is provided with a locking block, the locking groove is provided with a recess, the locking block is provided with a protrusion, and the recess and the protrusion are in locking engagement.

4. The electric screwdriver as claimed in claim 3, wherein the locking groove is formed in the locking housing, the locking block is formed in the ring gear housing, the locking groove comprises an inlet, a locking position and a locking block, the recess is formed in the locking block, and the locking block is fixedly connected with the locking housing, has a certain elasticity and can be elastically deformed.

5. The electric screwdriver according to claim 1, wherein the stopping mechanism comprises a power output disc connected with the transmission mechanism, a stopping ring is connected to the power output disc, a plurality of first protruding blocks are arranged on the power output disc at intervals, a plurality of grooves are correspondingly formed in the stopping ring, and the first protruding blocks are embedded in the grooves; an accommodating space is reserved between the power output disc and the stop ring, a stop block is placed in the accommodating space, a plurality of second protruding blocks are arranged on the outer side of the stop block at intervals, a gap is reserved between the first protruding block and the second protruding block, and a PIN column is placed in the gap.

6. The electric screwdriver according to claim 5, wherein the transmission mechanism comprises an input shaft, a first planetary gear train, a second planetary gear train and a third planetary gear train which are sequentially arranged, the third planetary gear train is connected with the power output disc, and the input shaft is connected with the power mechanism.

7. The power screwdriver of claim 6, wherein the first planetary train comprises a first sun gear coupled to the input shaft, a plurality of first planetary gears meshed with the first sun gear, the first planetary gears mounted on the first carrier;

8. The electric screwdriver as claimed in claim 1, wherein the output shaft is provided with a mounting groove for mounting the screwdriver bit, and the mounting groove is provided with an adsorption device.

9. The powered screwdriver of claim 8 wherein the suction means is a magnet.

10. The electric screwdriver according to claim 8, wherein the adsorption device is an electromagnetic coil connected with a power supply and capable of controlling on-off.