CN112440235A

CN112440235A - Electric screwdriver and angle adjusting method thereof

Info

Publication number: CN112440235A
Application number: CN201910824272.6A
Authority: CN
Inventors: 赵晓锋; 杨永青; 李欣欣
Original assignee: Foxconn Precision Electronic Langfang Co Ltd
Current assignee: FIH Precision Electronics Lang Fang Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2021-03-05
Anticipated expiration: 2039-09-02
Also published as: CN112440235B

Abstract

The invention discloses an electric screwdriver, which comprises a screwdriver and an electric motor, wherein the electric motor is used for driving the screwdriver to rotate, and the electric screwdriver further comprises: the detection module is used for detecting the inclination angle and the inclination direction of the screwdriver compared with a screwed workpiece; the comparison module is used for judging whether the inclination angle is equal to a target angle value or not; and the angle adjusting component is connected with the screwdriver and used for controlling the electric motor to rotate according to the inclination direction when the inclination angle is not equal to the target angle value, so that the inclination angle of the screwdriver is automatically adjusted. The electric screwdriver provided by the invention can automatically correct the inclination angle of the screwdriver. The invention further provides an angle adjusting method of the electric screwdriver.

Description

Electric screwdriver and angle adjusting method thereof

Technical Field

The invention relates to the field of screwdrivers, in particular to an electric screwdriver and an angle adjusting method thereof.

Background

In the production process of the mobile phone, an electric screwdriver is often adopted to assemble parts, and the electric screwdriver which is currently used mainly utilizes a motor arranged in the electric screwdriver to drive a screwdriver head to rotate so as to drive a screw to be screwed up and loosened. However, when assembling screws, the phenomenon that the screws are twisted obliquely due to the inclination of the screwdriver often occurs, and the product is damaged. Under the condition, the angle needs to be adjusted manually by an operator, so that the screwdriver can normally work under the vertical condition, the operation difficulty is high, the fatigue of the operator is easily caused, and the production efficiency is influenced.

Disclosure of Invention

In view of this, the present invention provides an electric screwdriver capable of automatically correcting an angle.

The invention also provides an angle adjusting method of the electric screwdriver.

The invention provides an electric screwdriver, which comprises a screwdriver and an electric motor, wherein the electric motor is used for driving the screwdriver to rotate, and the electric screwdriver further comprises:

the detection module is used for detecting the inclination angle and the inclination direction of the screwdriver compared with a screwed workpiece;

the comparison module is used for judging whether the inclination angle is equal to a target angle value or not; and

and the angle adjusting component is connected with the screwdriver and used for controlling the electric motor to rotate according to the inclination direction when the inclination angle is not equal to the target angle value, so that the inclination angle of the screwdriver is automatically adjusted.

The invention also provides an angle adjusting method of the electric screwdriver, which comprises the following steps:

detecting the inclination angle and the inclination direction of the screwdriver;

acquiring the inclination angle and a target angle value, and comparing whether the inclination angle and the target angle value are consistent; and

when the inclination angle of the screwdriver is inconsistent with the target angle value, the electric motor is controlled to rotate according to the inclination direction, so that the inclination angle is automatically adjusted to be consistent with the target angle value.

The invention has the following beneficial effects: the electric screwdriver can automatically correct the inclination angle of the screwdriver through the angle adjusting component.

Drawings

Fig. 1 is a schematic structural view of an electric screwdriver according to a preferred embodiment of the present invention.

Fig. 2 is a block diagram of the electric screwdriver shown in fig. 1.

Fig. 3 is an exploded view of the electric screwdriver shown in fig. 1.

Fig. 4 is a schematic view of the angle adjustment assembly of the power screwdriver and the screwdriver shown in fig. 3.

Fig. 5 is an exploded view of the angle adjustment assembly shown in fig. 4.

Fig. 6 is a top view of the angular adjustment assembly when the screwdriver of fig. 3 is not offset.

Fig. 7 is a top view of the angular adjustment assembly as the screwdriver of fig. 3 is offset toward the X-axis.

Fig. 8 is a top view of the angle adjustment assembly as the screwdriver of fig. 3 is offset toward the Y-axis.

Description of the main elements

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1 and 2, the present invention provides an electric screwdriver 100, wherein the electric screwdriver 100 includes a screwdriver body 10, an electronic control system 20, an angle adjustment assembly 30 and an operation portion 40.

The screwdriver body 10 includes a screwdriver 11 and an electric motor (not shown), and the screwdriver 11 is connected to the electric motor. The electric motor is used for driving the screwdriver 11 to rotate, so as to drive a screw (not shown) to be screwed and unscrewed to fix a screwed workpiece. In this embodiment, the screwdriver body 10 further includes a connector 12, and the screwdriver 11 is connected to the connector 12.

Referring to fig. 2, the electronic control system 20 includes a detection module 21, a setting module 22, and a comparison module 23.

The detection module 21 is configured to detect an inclination angle of the screwdriver 11 compared to the workpiece to be screwed, that is, an included angle between the screwdriver 11 and the workpiece to be screwed and an inclination direction of the screwdriver 11 relative to the workpiece to be screwed. In the present embodiment, the detection module 21 includes an angle sensor 211. The angle sensor 211 is configured to detect the tilt angle and the tilt direction.

The setting module 22 is used for setting a target angle value by a user. Specifically, the target angle value is an included angle of the driver 11 relative to the workpiece to be screwed when the driver 11 is working normally (i.e. the angle adjusting assembly 30 is not required to adjust the tilting angle of the driver 11). Typically, the target angle value is 90 degrees. The setting module 22 includes an input device 221 and a memory 222. The input device 221 is electrically connected to the memory 222. The input device 221 is used for a user to input a target angle value. The input device 221 may be an input screen, an input keyboard, and the like. The memory 222 is used for storing the target angle value input by the user.

The comparing module 23 is electrically connected to the electric motor, the angle sensor 211 and the setting module 22. The comparison module 23 is configured to obtain the inclination angle and the target angle value, and compare whether the inclination angle is consistent with the target angle value. When the inclination angle of the screwdriver 11 is consistent with the target angle value, the electric motor continues to work to drive the screwdriver 11 to rotate; when the tilt angle of the screwdriver 11 is inconsistent with the target angle value, the comparing module 23 transmits a first control signal to the angle adjusting assembly 30, so as to control the angle adjusting assembly 30 to automatically adjust the tilt angle to be consistent with the target angle value according to the tilt direction.

Referring to fig. 3 to fig. 5, the angle adjustment assembly 30 is electrically connected to the electronic control system 20. The angle adjustment assembly 30 is disposed at an end of the connecting member 12 away from the screwdriver 11. The angle adjustment assembly 30 includes a first bracket 31, a second bracket 32, two first transmission shafts 33, a first motor 35, a second transmission shaft 36, a second motor 37 and a connecting rod 39.

The first bracket 31 is fixed to the connecting member 12. In the present embodiment, a protrusion 13 is formed on the surface of the connecting member 12 away from the screwdriver 11. Correspondingly, the first bracket 31 is recessed toward the bottom of the connecting member 12 to form a groove (not shown), and the protrusion 13 is matched with the groove to fix the first bracket 31 and the connecting member 12.

The first bracket 31 includes a bracket portion 311 and two lugs 312 disposed at both sides of the bracket portion 311. The groove is formed in the bracket portion 311. A first opening 3111 is opened in the bracket portion 311, and the first opening 3111 has an arc-shaped inner surface. A first through hole 3121 is opened in each of the lugs 312, and the first through hole 3121 penetrates through the lugs 312. The two first through holes 3121 are coaxially disposed.

The second bracket 32 is located above the first opening 3111 and between the two lugs 312. The second bracket 32 is substantially hollow and rectangular in shape. The second bracket 32 includes four side edges 321 connected in sequence and a second through hole 322 defined by the four side edges 321. In the four side edges 321, two opposite side edges 321 are respectively provided with a third through hole 3211, and the two third through holes 3211 are coaxial with the first through hole 3121. The other two opposite side edges 321 are respectively provided with a fourth through hole 3212, and the two fourth through holes 3212 are coaxial and opposite to each other.

Each of the first transmission shafts 33 is inserted into the first through hole 3121 and the third through hole 3211, so that the second bracket 32 is connected to the first bracket 31 through the first transmission shaft 33. The first transmission shaft 33 is provided along the Y-axis direction. The first motor 35 is mounted on the second bracket 32 and connected to the first transmission shaft 33. The first motor 35 is used to drive the first transmission shaft 33 to rotate during driving, so that the first bracket 31 can be driven to rotate in the + X-axis direction and the-X-axis direction by the first transmission shaft 33. In this embodiment, the first transmission shaft 33 includes a first shaft seat 331, and a first shaft 332 and a second shaft 333 respectively disposed on two sides of the first shaft seat 331. The first shaft 332 passes through the first through hole 3121, and the second shaft 333 passes through the third through hole 3211.

As shown in fig. 6, the tilting angle of the screwdriver 11 is equal to the target angle value, i.e. the screwdriver 11 is not shifted. At this time, when the tilting direction of the driver 11 is toward the + X axis as shown in fig. 7, it means that the driver 11 needs to be rotated toward the-X axis to adjust the tilting angle. In this case, the first motor 35 drives and drives the first shaft 332 of the first transmission shaft 33 to rotate in the + X-axis direction in the first through hole 3121, and further drives the first bracket 31 to rotate in the-X-axis direction, thereby automatically adjusting the tilting angle; on the contrary, when the screwdriver 11 needs to rotate towards the + X axis direction to adjust the tilting angle, the first motor 35 drives the first shaft 332 of the first transmission shaft 33 to rotate in the first through hole 3121, and further drives the first bracket 31 to rotate towards the + X axis direction, so as to automatically adjust the tilting angle.

In this embodiment, the angle adjustment assembly 30 further includes a first limiting member 34 located in the first opening 3111 and disposed in the first bracket 31 and the second bracket 32. The first limiting member 34 includes a body 341 and two limiting blocks 342 disposed on two sides of the body 341. The body 341 has a shape matching the curved inner surface of the first opening 3111. The surface of the body 341 away from the first support 31 includes a second opening 3411. The first bracket 31 further includes two first protective blocks (not shown) disposed on a surface of the first opening 3111. The limiting block 342 cooperates with the first protecting block to prevent the first bracket 31 from over-rotating.

The connecting rod 39 includes a rod body 391 and a fixing plate 392 fixed to one end of the rod body 391. The second transmission shaft 36 is disposed at two sides of the fixing plate 392, and is inserted into the two fourth through holes 3212 through a second shaft seat 361, so that the second transmission shaft 36 is fixed in the second bracket 32. The direction of the second transmission shaft 36 is perpendicular to the direction of the first transmission shaft 33, i.e., the second transmission shaft 36 is disposed along the X-axis direction. The second motor 37 is mounted on the second drive shaft 36. The second motor 37 is configured to drive the second transmission shaft 36 to rotate in the fourth through hole 3212, and further drive the second bracket 32 and the first bracket 31 to rotate around the connection rod 39 at the same time, so as to adjust the tilting angle of the screwdriver 11. When the second transmission shaft 36 rotates, the second bracket 32 and the first bracket 31 can be driven to rotate around the connecting rod 39 to the + Y axis direction and the-Y axis direction at the same time. Specifically, the second transmission shaft 36 can drive the second bracket 32 to rotate around the connection rod 39 in the + Y-axis direction and the-Y-axis direction, and since the second bracket 32 and the first bracket 31 are fixedly connected in the Y-axis direction (i.e., the second bracket 32 and the first bracket 31 can be regarded as a whole in the Y-axis direction), the second bracket 32 can drive the first bracket 31 to rotate in the same direction when rotating in the + Y-axis direction and the-Y-axis direction.

Referring to fig. 8, the second motor 37 drives the second transmission shaft 36 to rotate in the fourth through hole 3212, so as to drive the second bracket 32 and the first bracket 31 to rotate around the connection rod 39 to the-Y axis direction, thereby automatically adjusting the tilt angle; on the contrary, when the tilting direction of the screwdriver 11 is towards the + Y axis, it indicates that the screwdriver 11 needs to rotate towards the-Y axis to adjust the tilting angle, in this case, the second motor 37 drives the second transmission shaft 36 to rotate in the fourth through hole 3212, and further drives the second bracket 32 and the first bracket 31 to simultaneously rotate towards the + Y axis, so as to automatically adjust the tilting angle.

The second bracket 32 further includes two second protection blocks (not shown), which are respectively disposed on the two side edges 321 having the third through holes 3211. The second protection block is used to prevent the second support 32 from over-rotating, i.e. to limit the amplitude of the rotation of the second support 32.

In the present embodiment, the angle adjustment assembly 30 further includes a second limiting member 38. The second position-limiting element 38 is fixed on the surface of the fixing plate 392 away from the rod 391, and is disposed in the second opening 3411. The second bracket 32 further includes two second protection blocks (not shown), which are respectively disposed on the two side edges 321 having the third through holes 3211. The second limiting member 38 cooperates with the second protection block to prevent the second bracket 32 from over-rotating. In the present embodiment, the second stopper 38 has a substantially trapezoidal shape.

The operation portion 40 is used to facilitate the user to use the electric screwdriver 100.

In this embodiment, the electric screwdriver 100 further comprises a start switch 50, and the start switch 50 is used for controlling the electric screwdriver 100 to start or stop working when being operated.

In the present embodiment, the electric screwdriver 100 further includes a power interface 51 and a battery (not shown). The power interface 51 is used for connecting the electric screwdriver 100 with an external power source. The battery is used for providing power for the electric screwdriver 100. When the power interface 51 is connected to an external power source, the electric screwdriver 100 does not consume the electric quantity of the battery; when the power interface 51 disconnects the external power or the external power is suddenly cut off, the electric screwdriver 100 operates by the power supplied from the battery.

In the present embodiment, the electric screwdriver 100 further includes an indicator 52, and the indicator 52 is configured to emit light when the inclination angle is inconsistent with the target angle value, so as to remind the user.

In the present embodiment, the electric screwdriver 100 further includes a forward/reverse rotation adjusting switch 53, and the forward/reverse rotation adjusting switch 53 is used for controlling the rotation direction of the screwdriver 11. Specifically, the clockwise rotation and the counterclockwise rotation of the screwdriver 11 can be controlled by the forward/reverse rotation adjusting switch 53.

In the present embodiment, the electric screwdriver 100 further includes a switch (not shown) electrically connected to the angle adjustment assembly 30. The change-over switch is used for controlling the adjusting mode of the inclination angle of the screwdriver 11. Specifically, when the tilting angle of the screwdriver 11 exceeds a certain angle, the angle sensor 211 transmits a second control signal to the angle adjustment assembly 30, and the angle adjustment assembly 30 stops working after receiving the second control signal, at this time, the tilting angle of the screwdriver 11 can be manually adjusted.

In the present embodiment, the electric screwdriver 100 further includes a first casing 60 and a second casing 61, and the first casing 60 is connected to the second casing 61. The first casing 60 is used for covering the angle adjustment assembly 30, the second casing 61 is used for covering the screwdriver body 10, and the screwdriver 11 extends out of the second casing 61.

The invention also provides a method for self-correcting the angle of the electric screwdriver 100, which comprises the following steps:

s11, the detecting module 21 detects the tilting angle and the tilting direction of the screwdriver 11.

S12, the comparing module 23 obtains the tilt angle and a target angle value, and compares whether the tilt angle and the target angle value are consistent.

S13, when the inclination angle of the screwdriver 11 is consistent with the target angle value, the electric motor continues to work to drive the screwdriver 11 to rotate; when the tilt angle of the screwdriver 11 is inconsistent with the target angle value, the comparing module 23 transmits a control signal to the angle adjusting assembly 30, so as to control the angle adjusting assembly 30 to automatically adjust the tilt angle to be consistent with the target angle value according to the tilt direction.

The electric screwdriver 100 of the present invention can self-calibrate the tilt angle of the screwdriver 11 during use, and automatically adjust the tilt angle of the screwdriver 11 when the tilt angle of the screwdriver 11 is inconsistent with the target angle value, so that the tilt angle of the screwdriver 11 is consistent with the target angle value, thereby avoiding manual angle calibration, reducing manual calibration time, enabling the screwdriver 11 to continuously work, and further improving production efficiency.

The above description is only an optimized embodiment of the present invention, but the present invention is not limited to this embodiment in practical application. Other modifications and changes to the technical idea of the present invention should be made by those skilled in the art within the scope of the claims of the present invention.

Claims

1. The utility model provides an electric screwdriver, includes a screwdriver and an electric motor, electric motor is used for driving the screwdriver rotates, its characterized in that, electric screwdriver still includes:

2. The screwdriver as claimed in claim 1, wherein said screwdriver further comprises a first bracket, a second bracket, two first transmission shafts and a first motor, said first bracket is connected to said screwdriver, said first bracket comprises a bracket portion and two lugs disposed at two sides of said bracket portion, said bracket portion has a first opening therein, each of said lugs has a first through hole therein, two of said first through holes are coaxially disposed, said second bracket comprises four side edges sequentially connected and a second through hole surrounded by four of said side edges, wherein two of said opposite side edges have a third through hole therein, two of said third through holes are coaxial with said first through hole, said second bracket is disposed above said first opening and between said two lugs, each of said first transmission shafts is inserted into said first through hole and said third through hole, the first motor is installed on the second support and is connected with the first transmission shaft.

3. The electric screwdriver as defined in claim 2, wherein said first transmission shaft comprises a first base and a first shaft and a second shaft respectively disposed on both sides of said first base, said first shaft passing through said first through hole, said second shaft passing through said third through hole.

4. The electric screwdriver of claim 2, further comprising a connector through which said angle adjustment assembly is connected to said screwdriver, wherein said first bracket is fixed to said connector.

5. The electric screwdriver as claimed in claim 2, further comprising a second transmission shaft and a second motor, wherein the direction of the second transmission shaft is perpendicular to the direction of the first transmission shaft, two opposite side edges of the second bracket are respectively provided with a fourth through hole, the two fourth through holes are coaxially and oppositely arranged, the second transmission shaft is inserted into the two fourth through holes to fix the second transmission shaft to the second bracket, and the second motor is mounted on the second transmission shaft.

6. The electric screwdriver as claimed in claim 5, further comprising a connecting rod, wherein the connecting rod comprises a rod body and a fixing plate fixed to the rod body, and the second transmission shaft is disposed at both sides of the fixing plate.

7. The screwdriver as claimed in claim 6, further comprising a first limiting member disposed in the first opening and disposed in the first bracket and the second bracket, wherein the first limiting member comprises a body and two limiting blocks disposed at two sides of the body, the first bracket further comprises two first protection blocks disposed on a surface of the first opening, and the limiting blocks are matched with the first protection blocks.

8. The electric screwdriver as claimed in claim 7, wherein the surface of the body away from the first bracket comprises a second opening, the electric screwdriver further comprises a second limiting member fixed on the surface of the fixing plate away from the rod body and disposed in the second opening, the second bracket further comprises two second protection blocks disposed on the two sides having the third through hole, respectively, and the second limiting member is matched with the second protection blocks.

9. The power screwdriver as defined in claim 1, wherein said power screwdriver further comprises a switch.

10. An angle adjustment method of an electric screwdriver according to any one of claims 1 to 9, comprising: