Intelligent electric screwdriver

Abstract

The utility model discloses an intelligent electric screwdriver which comprises a motor, a magnet connected with an output shaft at the rear end of the motor, a magnetic encoder arranged on a shell and located right behind the motor, an indicator lamp ring arranged on the front end face of the shell, a light guide column connected to a front cover, an installation frame arranged at the bottom of the rear cover and a control panel arranged on the installation frame. The left side and the right side of the installation frame are rotationally connected with big and small buttons, and the control panel is provided with a forward and reverse rotation Hall switch matched with magnetic pieces of the big and small buttons. The magnetic encoder is used for detecting a rotating magnetic field generated when the magnet is driven by the motor to rotate so as to detect the rotating position of the motor, so that high-precision torque control is achieved, screwing torque of the screwdriver is accurately controlled, meanwhile, the indicating lamp ring and the light guide column are arranged, state indication of the screwdriver under different working conditions is achieved, and the screwdriver is convenient to use. The large and small buttons are provided with magnetic pieces, the control panel is provided with a forward and reverse rotation Hall switch, the large and small buttons control forward and reverse rotation of the tool bit, and therefore intelligence of the electric screwdriver is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tightening tools, and in particular to an intelligent electric screwdriver. Background Technology

[0002] An electric screwdriver is an electric screw tightening tool, which is widely used in industry and daily life. It can make the disassembly and assembly of screws simple and efficient, saving time and effort.

[0003] However, most common electric screwdrivers on the market are driven by motors, and the torque is transmitted through reduction gears. The torque deviation is large, and it is difficult to control the tightening torque of the screwdriver. Especially after the screw has been tightened, if the screwdriver continues to rotate, it is very likely to cause the screw to be damaged. Moreover, even if a smart screwdriver uses a servo motor instead of an ordinary motor, it has a complex structure and a large size, which is not convenient to use. Contents of utility model

[0004] The purpose of the utility model is to provide an intelligent electric screwdriver which has a simple and compact structure, greatly reduces the axial load on the motor, and is easy to use.

[0005] To achieve the above-mentioned purpose, the utility model provides an intelligent electric screwdriver, comprising a housing, a front cover and a rear cover at both ends of the housing, and a motor and a reducer installed in the housing, wherein the motor and the reducer are threadedly connected by flanges and bolts, the motor is transmitted to the reducer through a front output shaft, and a magnet is connected to the rear output shaft of the motor, a magnetic encoder for detecting the magnetic field generated by the rotation of the magnet is installed on the side of the housing located away from the reducer, a reducer output shaft is provided at the front end of the reducer, a shaft sleeve is sleeved on the reducer output shaft, and the reducer output shaft is fixed to the shaft sleeve through a latch connection structure The front end of the sleeve is provided with a torque output shaft, and is detachably connected to the cutter head through the torque output shaft. An indicator light ring is installed on the front end surface of the shell through screws. A light guide column matching the indicator light ring is connected to the front cover. A mounting frame extending to the inside of the shell is installed at the bottom of the rear cover. A control board is installed on the mounting frame, and large buttons and small buttons are rotatably connected to the left and right sides of the mounting frame. The large button is provided with a first magnetic part, and the small button is provided with a second magnetic part. The control board is respectively provided with a forward Hall switch matching the first magnetic part and a reverse Hall switch matching the second magnetic part.

[0006] Optionally, the rear cover and the housing are threadedly connected by the same bolt passing through the threaded hole on the side, and the outer front end of the housing is connected to the front cover by a fine pitch thread.

[0007] Optionally, the two sides of the control panel are connected to the large button and the small button respectively through elastic members.

[0008] Optionally, a wiring socket is installed on the top of the rear cover. The wiring socket is provided with a plurality of connection ports, and the connection ports are respectively connected to the motor and the control board through wires. The wiring socket is electrically connected to an external controller.

[0009] Optionally, the wire of the indicator light ring extends to the rear end of the motor through the wire groove and is combined with the wire of the motor and connected to the connection port.

[0010] Optionally, the pin connection structure includes a plug rod, a first jack and a second jack. The plug rod is vertically inserted into the end of the output shaft of the reducer through the first jack. The second jack is provided on the shaft sleeve, and the second jack communicates with the inner cavity of the shaft sleeve. The plug rod is fixedly connected to the output shaft of the reducer by inserting both ends into the second jack.

[0011] Optionally, a first protective shell and a second protective shell are arranged inside the housing. The motor and the reducer are installed in the first protective shell. A support frame is provided on the top of the first protective shell and is connected to the second protective shell through the support frame. An installation plate is installed in the second protective shell, and the installation plate is fixed on the top of the first protective shell through a support column. The magnetic encoder is installed on the installation plate.

[0012] Optionally, anti-slip grooves are provided on the outer surface of the housing.

[0013] Optionally, the motor is a double-shaft brushless motor.

[0014] Optionally, the reducer is a planetary reducer.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] (1) A magnet is connected to the rear shaft of the double-shaft brushless motor of the present utility model, and a magnetic encoder is installed directly behind the motor. The magnetic encoder detects the rotating magnetic field generated by the rotation of the magnet driven by the double-shaft brushless motor to detect the rotation position of the motor, so as to achieve high-precision torque control, and then accurately control the tightening torque of the screwdriver. And the front shaft of the double-shaft brushless motor is connected to the planetary reducer. The planetary reducer has a compact structure, can withstand large radial and axial loads, and can generate a large output torque. At the same time, the double-shaft brushless motor itself has a simple structure, without brushes, and the friction during operation is greatly reduced, and the operation is smooth. It is beneficial to the use of the electric screwdriver. At the same time, through the compact design, the number of parts is reduced and the assembly is simplified.

[0017] (2) In this utility model, an indicator light ring is installed on the front end face of the outer shell by screws, and a light guide column matched with the indicator light ring is connected to the front cover, so as to realize the status indication of the screwdriver under different working conditions. At the same time, elastic members are respectively connected to the large button and the small button on both sides of the control board, and a first magnetic member is provided on the large button, and a second magnetic member is provided on the small button. A forward rotation Hall switch matched with the first magnetic member and a reverse rotation Hall switch matched with the second magnetic member are respectively provided on the control board, so as to realize the control of the forward and reverse rotation of the tool bit by the large and small buttons, and further realize the intellectualization of the electric screwdriver.

[0018] (3) The output shaft of the speed reducer of this utility model is fixedly connected to the shaft sleeve through a pin connection structure. A torque output shaft is provided at the front end of the shaft sleeve, and the tool bit is detachably connected through the torque output shaft. Thus, while the tool bit can be quickly replaced, different specifications of the shaft sleeve with a torque output shaft can be replaced to meet the installation requirements of different tool bits for different screw specifications. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of this utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of this utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a perspective view of the embodiment of this utility model.

[0021] Figure 2 It is an exploded view of the structure of the embodiment of this utility model.

[0022] Figure 3 It is a connection structure diagram between the control board and the large button and the small button of the embodiment of this utility model.

[0023] Figure 4 It is an internal structure diagram of the first protective shell of the embodiment of this utility model.

[0024] Figure 5 It is an exploded view of the pin connection structure of the embodiment of this utility model.

[0025] In the figure: housing 1, fine-thread screw 101, anti-slip groove 102, front cover 2, rear cover 3, motor 4, reducer 5, reducer output shaft 501, magnet 6, magnetic encoder 7, bushing 8, torque output shaft 801, pin connection structure 9, plug rod 901, first jack 902, second jack 903, indicator light ring 10, light guide column 11, mounting bracket 12, control board 13, forward rotation Hall switch 1301, reverse rotation Hall switch 1302, large button 14, first magnetic part 1401, small button 15, second magnetic part 1501, elastic part 16, wiring socket 17, wire 18, first protective shell 19, second protective shell 20, support frame 21, mounting plate 22, support column 23, threaded hole 24, cutter head 25. Detailed implementation mode

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the embodiments of the present invention, and should not be construed as a limitation to the present invention.

[0027] In the description of the embodiments of the present invention, it should be understood that if there are directional indications involved in the embodiments of the present invention, such as upper, lower, left, right, front, rear, inner, outer, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, the meaning of "a plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, if there are terms such as "installation", "connection", "connection", "fixation", etc., they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0030] As shown Figures 1 to 5 In the embodiment of the present utility model, an intelligent electric screwdriver is provided, which includes a housing 1, a front cover 2 and a rear cover 3 located at both ends of the housing 1, and a motor 4 and a reducer 5 installed inside the housing 1. The motor 4 and the reducer 5 are connected by a flange and a bolt in a threaded manner. The motor 4 is transmitted to the reducer 5 through a front-end output shaft, and a magnet 6 is connected to the rear-end output shaft of the motor 4. A magnetic encoder 7 for detecting the magnetic field generated by the rotation of the magnet 6 is installed on one side of the housing 1 away from the reducer 5. A reducer output shaft 501 is provided at the front end of the reducer 5. A bushing 8 is sleeved on the reducer output shaft 501, and the reducer output shaft 501 is fixedly connected to the bushing 8 through a pin connection structure 9. A torque output shaft 801 is provided at the front end of the bushing 8, and is detachably connected to 16 through the torque output shaft 801. An indicator light ring 10 is installed on the front end face of the housing 1 by screws. A light guide column 11 matched with the indicator light ring 10 is connected to the front cover 2. An installation frame 12 extending into the interior of the housing 1 is installed at the bottom of the rear cover 3. A control board 13 is installed on the installation frame 12. A large button 14 and a small button 15 are rotatably connected to the left and right sides of the installation frame 12. A first magnetic member 1401 is provided on the large button 14, and a second magnetic member 1501 is provided on the small button 15. A forward rotation Hall switch 1301 matched with the first magnetic member 1401 and a reverse rotation Hall switch 1302 matched with the second magnetic member 1501 are respectively provided on the control board 13.

[0031] Specifically, a magnet 6 is connected to the rear-end output shaft of the motor 4, and a magnetic encoder 7 is installed directly behind the motor 4. The rotation position of the motor 4 is detected by detecting the rotating magnetic field generated by the rotation of the magnet 6 driven by the motor 4 through the magnetic encoder 7, so as to achieve high-precision torque control, and then accurately control the tightening torque of the screwdriver; by installing an indicator light ring 10 on the front end face of the housing 1 by screws, and connecting a light guide column 11 matched with the indicator light ring 10 to the front cover 2, the state indication of the screwdriver under different working conditions is realized, and then the intelligence of the electric screwdriver is realized; the large button 14 and the small button 15 are rotatably connected to the installation frame 12, and forward and reverse rotation Hall switches matched with the magnetic members of the large and small buttons 15 are provided on the control board 13. By using the Hall principle to achieve Boolean quantity control, the large button 14 controls the forward rotation of the tool bit 25, and the small button 15 controls the reverse rotation of the tool bit 25, so as to realize the control of the forward and reverse rotation of the tool bit 25 by the large and small buttons 15, and then realize the intelligence of the electric screwdriver.

[0032] In this embodiment, as Figure 2 shown, the rear cover 3 and the housing 1 are connected by the same bolt passing through the threaded hole 24 on the side in a threaded manner, and the outer side of the front end of the housing 1 is connected to the front cover 2 through a fine thread 101 to achieve the effect of sealing and protecting internal components.

[0033] In this embodiment, as Figure 2 and Figure 3As shown, both sides of the control board 13 are respectively connected to the large button 14 and the small button 15 through elastic members 16, so that under the action of the elastic members, the pressed large and small buttons can be restored to their original positions.

[0034] In this embodiment, as Figure 1 and Figure 2 shown, a wiring socket 17 is installed at the top of the rear cover 3. The wiring socket 17 is provided with a plurality of connection ports. The connection ports are respectively connected to the motor 4 and the control board 13 through wires 18. The wire 18 of the indicator light ring 10 extends to the rear end of the motor 4 through the wire groove and is joined with the wire 18 of the motor 4 to be connected to the connection port. The wiring socket 17 is electrically connected to an external controller, so that the motor and the forward and reverse Hall switches can be controlled by the external controller, and thus the forward and reverse rotation and standby of the screwdriver can be controlled.

[0035] In this embodiment, as Figure 5 shown, the pin connection structure 9 includes a plug rod 901, a first jack 902 and a second jack 903. The plug rod 901 is vertically inserted into the end of the output shaft 501 of the reducer through the first jack 902. The second jack 903 is opened on the sleeve 8, and the second jack 903 communicates with the inner cavity of the sleeve 8. The plug rod 901 is fixedly connected to the output shaft 501 of the reducer by inserting both ends into the second jack 903.

[0036] In this embodiment, as Figure 2 and Figure 4 shown, a first protective case 19 and a second protective case 20 are provided inside the housing 1. The motor 4 and the reducer 5 are installed inside the first protective case 19. A support frame 21 is provided at the top of the first protective case 19 and is connected to the second protective case 20 through the support frame 21. An installation plate 22 is installed inside the second protective case 20, and the installation plate 22 is fixed to the top of the first protective case 19 through a support column 23. A magnetic encoder 7 is installed on the installation plate 22.

[0037] In this embodiment, as Figure 1 and Figure 2 shown, the outer surface of the housing 1 is provided with anti-slip grooves 102 to increase the friction between the hand and the surface of the screwdriver when holding the screwdriver.

[0038] In this embodiment, the motor 4 is a brushless motor with double output shafts. The structure of the brushless motor with double output shafts is simple. Without brushes, the friction during operation is greatly reduced, and the operation is smooth, which is beneficial to the use of the electric screwdriver.

[0039] In this embodiment, the reducer 5 is a planetary reducer. The planetary reducer has a compact structure, can withstand large radial and axial loads, and can generate a large output torque, which is beneficial to the use of the electric screwdriver.

[0040] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An intelligent electric screwdriver, comprising a housing (1), a front cover (2) and a rear cover (3) located at two ends of the housing (1), and a motor (4) and a reducer (5) installed in the housing (1), characterized in that: The motor (4) and the reducer (5) are threadedly connected via flanges and bolts. The motor (4) is driven by the reducer (5) via a front output shaft, and the rear output shaft of the motor (4) is connected to a magnet (6). The housing (1) is located on a side of the motor (4) away from the reducer (5) and is provided with a magnetic encoder (7) for detecting a magnetic field generated by the rotation of the magnet (6). The reducer output shaft (501) of the reducer (5) is connected to the shaft sleeve (8) via a latch connection structure (9). The shaft sleeve (8) is provided with a torque output shaft (801) at the front end, and is detachably connected to the cutter head (25) via the torque output shaft (801). An indicator light ring (10) is installed on the front end surface of the housing (1) via screws. The front cover (2) is connected to a light guide column (11) matched with an indicator light ring (10); a mounting frame (12) extending to the inside of the housing (1) is installed at the bottom of the rear cover (3); a control panel (13) is installed on the mounting frame (12); and a large button (14) and a small button (15) are rotatably connected to the left and right sides of the mounting frame (12); the large button (14) is provided with a first magnetic part (1401), and the small button (15) is provided with a second magnetic part (1501); and the control panel (13) is respectively provided with a forward Hall switch (1301) matched with the first magnetic part (1401) and a reverse Hall switch (1302) matched with the second magnetic part (1501).

2. The intelligent electric screwdriver according to claim 1, characterized in that: The rear cover (3) and the outer shell (1) are threadedly connected by the same bolt passing through a threaded hole (24) on the side, and the outer front end of the outer shell (1) is connected to the front cover (2) via a fine thread (101).

3. The intelligent electric screwdriver according to claim 1, characterized in that: Both sides of the control panel (13) are connected to the large button (14) and the small button (15) respectively through elastic members (16).

4. The intelligent electric screwdriver according to claim 1, characterized in that: A wiring socket (17) is installed on the top of the rear cover (3), and a plurality of connection ports are provided on the wiring socket (17). The connection ports are respectively connected to the motor (4) and the control board (13) through wires (18), and the wiring socket (17) is electrically connected to an external controller.

5. The intelligent electric screwdriver according to claim 4, characterized in that: The wire (18) of the indicator light ring (10) extends to the rear end of the motor (4) through the wire groove, and is combined with the wire (18) of the motor (4) and connected to the connection port.

6. The intelligent electric screwdriver according to claim 1, characterized in that: The plug connection structure (9) comprises an insertion rod (901), a first insertion hole (902) and a second insertion hole (903); the insertion rod (901) is vertically inserted into the end of the reducer output shaft (501) through the first insertion hole (902); the shaft sleeve (8) is provided with the second insertion hole (903), and the second insertion hole (903) is communicated with the inner cavity of the shaft sleeve (8); the insertion rod (901) is fixedly connected to the reducer output shaft (501) by inserting the two ends of the insertion rod (901) into the second insertion hole (903).

7. The intelligent electric screwdriver according to claim 1, characterized in that: A first protective shell (19) and a second protective shell (20) are provided in the housing (1); a motor (4) and a reducer (5) are installed in the first protective shell (19); a support frame (21) is provided on the top of the first protective shell (19), and the first protective shell (19) is connected to the second protective shell (20) via the support frame (21); a mounting plate (22) is installed in the second protective shell (20), and the mounting plate (22) is fixed to the top of the first protective shell (19) via a support column (23); and the magnetic encoder (7) is installed on the mounting plate (22).

8. The intelligent electric screwdriver according to claim 1, characterized in that: The outer surface of the housing (1) is provided with an anti-slip groove (102).

9. The intelligent electric screwdriver according to claim 1, characterized in that: The motor (4) is a double-shaft brushless motor.

10. The intelligent electric screwdriver according to claim 1, characterized in that: The reducer (5) is a planetary reducer.

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