Double-chuck electric screwdriver

Abstract

The utility model provides a double-chuck electric screwdriver, and belongs to the technical field of screwdrivers. Comprising a screwdriver body, chucks arranged at the two ends of the screwdriver body, driving parts arranged with the chucks in a one-to-one mode, a battery arranged in the middle of the screwdriver body and a control panel. Each driving component comprises a motor and a speed reducer fixedly connected with an output shaft of the motor, and the chuck is fixedly connected with the output end of the speed reducer. The battery and the motor are both electrically connected with the control panel; and the control panel is used for outputting the electric energy of the battery to the motor, and is also used for controlling the positive and negative pole directions of the electric energy output to the motor. The two ends of the screwdriver body are both provided with the chucks, one chuck can be used for installing the screwdriver bit, the other chuck can be used for installing the wire stripper, when wiring installation is carried out, the wire stripper is only needed to carry out wire stripping, the screwdriver bit at the other end is turned and used, a screw can be tightened, and wiring is completed, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of screwdrivers, and particularly relates to a double-chuck electric screwdriver. Background Art

[0002] Currently, when conducting wiring operations in fire protection projects or other low-voltage electrical projects, it is necessary to first strip the sheath at the end of the wire, then insert the wire conductor into the wiring hole, and finally tighten the screw for fixation. During this process, two operations with relatively large workloads, namely wire stripping and screwing, are involved.

[0003] Although currently, workers use wire strippers or electric wire strippers for wire stripping and electric screwdrivers for tightening screws, it is necessary to change tools during the process, which is inconvenient for operation. There are also workers who use a single electric tool for wire stripping and screwing, but when stripping wires, it is necessary to replace the wire stripper (a kind of wire stripping bit), and when screwing screws, it is necessary to replace the screwdriver bit, and the operation is also inconvenient. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a double-chuck electric screwdriver, which can install a wire stripper at one end and a screwdriver bit at the other end.

[0005] In order to solve one or part or all of the above technical problems, the technical solution adopted by the utility model is as follows:

[0006] A double-chuck electric screwdriver includes a screwdriver body, chucks arranged at both ends of the screwdriver body, driving components arranged in one-to-one correspondence with the chucks, a battery and a control board arranged in the middle of the screwdriver body;

[0007] Each of the driving components includes a motor and a speed reducer fixedly connected to the output shaft of the motor, and the chuck is fixedly connected to the output end of the speed reducer;

[0008] The battery and the motor are both electrically connected to the control board; the control board is used to output the electric energy of the battery to the motor, and is also used to control the positive and negative directions of the electric energy output to the motor.

[0009] Further, torsion adjustment rings are rotatably arranged at both ends of the screwdriver body, and the torsion adjustment rings are used to adjust the output torsion of the speed reducer.

[0010] Further, the speed reducer includes a planetary speed reducer, a speed reducer housing is sleeved outside the planetary speed reducer, and the speed reducer housing is fixedly connected to the screwdriver body; the reducer housing of the planetary speed reducer is rotatably connected to the speed reducer housing;

[0011] A connecting cylinder is coaxially and fixedly arranged on the end face of the speed reducer housing away from the motor. A slip ring and a torsion ring are sequentially sleeved on the connecting cylinder. The slip ring is axially slidably connected to the connecting cylinder. The torsion ring is threadedly connected to the connecting cylinder, and the torsion ring is clamped with the torsion adjusting ring.

[0012] A plurality of through holes are uniformly arranged along the circumference on the periphery of the connecting cylinder, and a ball is arranged in each through hole.

[0013] A spring that is one-to-one matched with the ball is arranged on the side of the slip ring facing the planetary speed reducer.

[0014] Triangular bosses are uniformly arranged along the circumference on the end face of the output end of the planetary speed reducer, and the number of the bosses is equal to the number of the balls.

[0015] Further, an operation button is provided on the screwdriver body for each motor, and the operation button is electrically connected to the control board. A forward rotation button and a reverse rotation button are arranged on the operation button. The control board is used to control the on-off and current direction of the current output to the corresponding motor according to the trigger signals of the forward rotation button and the reverse rotation button.

[0016] Further, a handle is vertically arranged in the middle of the screwdriver body, and the battery and the control board are both arranged in the handle.

[0017] Further, operation buttons electrically connected to the control board are arranged on both sides of the screwdriver body. The operation buttons are arranged beside the handle and are used to control the corresponding motor. A switching button electrically connected to the control board is also arranged on the electric screwdriver, and the switching button is used to switch between the left-hand mode and the right-hand mode.

[0018] Further, the screwdriver body is in a straight cylinder shape.

[0019] Further, the screwdriver body is in a curved arch shape.

[0020] Further, a screwdriver bit and a wire stripper are respectively installed in the two chucks.

[0021] Further, the chuck is provided with an installation hole with internal hexagon. <S

[0022] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0023] Both ends of the screwdriver body of the present utility model are provided with chucks. One chuck can install a screwdriver bit, and the other chuck can install a wire stripper. When a worker is conducting wiring installation, after stripping the wire with the wire stripper, they only need to reverse the tool and use the screwdriver bit at the other end to tighten the screw to complete the wiring, which is convenient and fast. At the same time, the two chucks can also install two common screwdriver bits simultaneously, or install two common wire strippers simultaneously, eliminating the need to frequently replace the screwdriver bit or wire stripper during use. Description of the Drawings

[0024] The following further elaborates on the present utility model in detail with reference to the drawings.

[0025] Figure 1 : Schematic structural diagram of Embodiment 1 of the present utility model;

[0026] Figure 2 : Partial cross-sectional view of Embodiment 1 of the present utility model;

[0027] Figure 3 : Assembly schematic diagram of the chuck and drive component of Embodiment 1 of the present utility model;

[0028] Figure 4 : Schematic structural diagram of Embodiment 2 of the present utility model;

[0029] Figure 5 : Partial cross-sectional view of Embodiment 2 of the present utility model;

[0030] Figure 6 : Schematic structural diagram of Embodiment 3 of the present utility model;

[0031] Figure 7 : Partial cross-sectional view of Embodiment 3 of the present utility model;

[0032] Wherein: 1 - screwdriver body, 11 - operation button, 12 - handle, 2 - chuck, 3 - motor, 4 - reducer, 41 - reducer housing, 411 - connecting cylinder, 412 - torsion ring, 413 - slip ring, 414 - through hole, 42 - planetary reducer, 421 - reducer housing, 422 - boss, 423 - output ring, 43 - ball, 44 - spring, 5 - torque adjustment ring, 6 - battery, 7 - control board, 8 - screwdriver bit, 9 - wire stripper. Detailed Embodiments

[0033] To better understand the present utility model, the following further clarifies the content of the present utility model in combination with embodiments and drawings. However, the protected content of the present utility model is not limited to the following embodiments. In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details.

[0034] Embodiment 1: Refer to Figures 1 - 3 , the purpose of this embodiment is to provide a dual-chuck electric screwdriver. It includes a screwdriver body 1, and chucks 2 are arranged at both ends of the screwdriver body 1. The chuck 2 is provided with an inner hexagonal mounting hole for mounting a screwdriver bit 8 with a hexagonal shank or a stripper 9 with a hexagonal shank; a strong magnet is arranged in the mounting hole of the chuck 2, or a self-locking mechanism is arranged on the chuck 2 to prevent the mounted screwdriver bit 8 or wire stripper 9 from falling off.

[0035] Each chuck 2 is equipped with a motor 3 and a speed reducer 4 as driving components. The motor 3 and the speed reducer 4 are both fixedly arranged in the screwdriver body 1. The speed reducer 4 is fixedly connected to the output shaft of the motor 3, and the chuck 2 is fixedly connected to the output end of the speed reducer 4. When the motor 3 is started, the chuck 2 can be driven to rotate by using the speed reducer 4.

[0036] Torque adjustment rings 5 that are rotatably connected are also arranged at both ends of the screwdriver body 1. The torque adjustment rings 5 are used to adjust the magnitude of the torque output by the corresponding speed reducer 4. Specifically, the speed reducer 4 includes a planetary reducer 42. The planetary reducer 42 is cylindrical as a whole, and a speed reducer housing 41 is sleeved outside it. The speed reducer housing 41 is fixedly connected to the screwdriver body 1. The outside of the planetary reducer 42 is a cylindrical reducer housing 421. When the speed reducer housing 41 and the planetary reducer 42 are assembled, the reducer housing 421 can rotate in the speed reducer housing 41 but cannot move axially.

[0037] A connecting cylinder 411 is coaxially and fixedly arranged on the end face of the speed reducer housing 41 away from the motor 3. A slip ring 413 and a torsion ring 412 are sleeved on the connecting cylinder 411. The slip ring 413 is clamped with the axial chute on the connecting cylinder 411, so that the slip ring 413 can slide along the axial direction of the connecting cylinder 411; the torsion ring 412 is clamped with the spiral groove on the connecting cylinder 411, so that the torsion ring 412 is threadedly connected to the connecting cylinder 411. The slip ring 413 is located between the torsion ring 412 and the planetary reducer 42. Therefore, when the torsion ring 412 is rotated, the distance between the slip ring 413 and the planetary reducer 42 can be adjusted.

[0038] On the end face of the speed reducer housing 41 away from the motor 3, a plurality of through holes 414 are evenly arranged circumferentially around the connecting cylinder 411. Ball bearings 43 are arranged in the through holes 414. A spring 44 is arranged on the side of the slip ring 413 facing the planetary reducer 42. The spring 44 is arranged one-to-one with the ball bearings 43 and is used to apply pressure to the ball bearings 43 so that they are in contact with the end face of the output end of the reducer housing 421 (the end face away from the motor 3). At the same time, convex platforms 422 are evenly arranged circumferentially on the end face of the output end of the planetary reducer 42. The cross section of the convex platforms 422 is triangular, and the number is equal to the number of the ball bearings 43. The protruding height of the convex platforms 422 is less than the diameter of the ball bearings 43.

[0039] The output end of the planetary speed reducer 42 is an internally provided output ring 423, and the chuck 2 is snap-connected to the output ring 423 after sequentially passing through the torque adjustment ring 5 and the connecting cylinder 411.

[0040] When the reducer housing 41 and the planetary speed reducer 42 are assembled, the boss 422 contacts the end wall of the reducer housing 41, and the ball 43 protrudes from the through hole 414 under the action of the spring and abuts against the end face of the output end of the reducer housing 421. When the planetary speed reducer 42 works, the output force can drive the output ring 423 to rotate, and part of the reaction force will act on the reducer housing 421; when the resistance received by the chuck 2 during rotation is small, most of the output force of the planetary speed reducer 42 is output through the output ring 423, and the reducer housing 421 does not rotate due to the blocking of the ball 43; when the resistance received by the chuck 2 during rotation is large, part of the output of the planetary speed reducer 42 drives the reducer housing 421 to rotate, but due to the action of the ball 43, the reducer housing 421 must overcome the elastic force of the spring 44 before it can continue to rotate. Therefore, when the distance between the slip ring 413 and the planetary speed reducer 42 is small and the elastic force of the spring 44 is large, the reducer housing 421 is more easily blocked by the ball 43 and stops rotating, enabling more force to be output through the output ring 423, that is, a larger torque is output; conversely, a part of the output of the planetary speed reducer 42 will act on the reducer housing 421 and be consumed during the rotation of the reducer housing 421 and the compression of the spring 44, and the output of the output ring 423 becomes smaller, that is, a smaller torque is output.

[0041] The torsion ring 412 is coaxially snap-connected to the torque adjustment ring 5. Therefore, by rotating the torque adjustment ring 5, the torsion ring 412 can be rotated to adjust the output torque of the response reducer 4.

[0042] A battery 6 and a control board 7 are provided in the middle of the screwdriver body 1. The motor 3 and the battery 6 are both electrically connected to the control board 7. The motor 3 is a DC motor. The control board 7 is used to output the electric energy of the battery 6 to the motor 3 to drive the motor 3 to rotate, and is also used to control the positive and negative directions of the electric energy output to the motor 3 to control the forward or reverse rotation of the motor 3. The control board 7 is also used to control the charge and discharge management of the battery 6. The battery 6 includes a plurality of lithium-ion batteries.

[0043] An operation button on the screwdriver body 1 is provided for each motor 3, and the operation button 11 is electrically connected to the control board 7. The operation button 11 is provided with a forward rotation button and a reverse rotation button, corresponding to the forward and reverse rotations of the motor 3. At the same time, a charging interface electrically connected to the control board 7 is also provided on the screwdriver body 1. A processing chip and an H-bridge circuit are provided on the control board 7. The processing chip can receive the trigger signals of the forward rotation button and the reverse rotation button on different operation buttons 11 and control the direction of the output current (positive and negative directions) through the H-bridge circuit.

[0044] The screwdriver body 1 of this embodiment is in a straight cylindrical shape. By respectively arranging chucks 2 and supporting driving components at both ends of the screwdriver body 1, each chuck 2 can be independently controlled. For example, a screwdriver bit 8 is installed at one end of the screwdriver body 1 in the attached drawing, and a wire stripper 9 is installed at the other end. When a worker is performing wiring installation, after stripping the wire with the wire stripper 9, they only need to turn the screwdriver and use the screwdriver bit 8 at the other end to tighten the screw to complete the wiring. When currently using a single-bit screwdriver, the bit needs to be replaced during the process.

[0045] The wire stripper 9 is provided with a wire passing hole along the axis, and an inclined slot is arranged on the side. The slot communicates with the wire passing hole. A blade is arranged in the slot, and the cutting edge part extends into the wire passing hole. When in use, insert the wire into the wire passing hole, start the screwdriver to make the wire stripper 9 rotate, and the wire stripper 9 will cut off the sheath of the wire.

[0046] Of course, the application of installing a screwdriver bit 8 at one end and a wire stripper 9 at the other end in the attached drawing is only an example. Different models of screwdriver bits 8 can also be installed at both ends, or different models of wire strippers 9 can be installed, so as to avoid the need to replace different models of screwdriver bits or wire strippers during use.

[0047] Embodiment 2: Refer to Figures 4 - 5 , the double-chuck electric screwdriver provided in this embodiment has mainly made the following improvements compared with Embodiment 1: The screwdriver body 1 of this embodiment is in a bent arch shape. When a worker holds the middle part of the screwdriver body 1, the screwdriver body 1 is not easy to rotate and slip, and it is more labor-saving to use.

[0048] Embodiment 3: Refer to Figures 6 - 7 , the double-chuck electric screwdriver provided in this embodiment has mainly made the following improvements compared with Embodiment 1 or Embodiment 2: The overall electric screwdriver of this embodiment is in a T shape. A handle 12 is vertically arranged in the middle of the screwdriver body 1, and the battery 6 and the control board 7 are both arranged in the handle 12. Two operation buttons 11 are respectively located on both sides of the screwdriver body 1 and are both arranged beside the handle 12, which is convenient for pressing with the thumb when holding the handle 12.

[0049] A switching button (not shown in the figure) electrically connected to the control board 7 is also arranged on the screwdriver of this embodiment, which is used to switch between the left-hand mode and the right-hand mode. Taking the attached Figure 6 as an example, in the right-hand mode, hold the handle 12 with the right hand and press the operation button 11 with the thumb to operate the screwdriver bit 8 at the left end; when switching to the left-hand mode, hold the handle 12 with the left hand and press the operation button 11 with the thumb to operate the wire stripper 9 at the right end.

[0050] The screwdriver body 1 of this embodiment can also adopt the straight cylindrical shape of Embodiment 1, or the bent arch shape of Embodiment 2 (only slightly bent at this time).

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Any other modifications or equivalent substitutions made by those of ordinary skill in the art to the technical solutions of the present invention shall be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A double-chuck electric screwdriver, characterized in that, It includes a screwdriver body, chucks provided at both ends of the screwdriver body, driving components provided in one-to-one correspondence with the chucks, a battery and a control board provided in the middle of the screwdriver body; The driving components each include a motor and a speed reducer fixedly connected to the output shaft of the motor, and the chuck is fixedly connected to the output end of the speed reducer; The battery and the motor are both electrically connected to the control board; the control board is used to output the electric energy of the battery to the motor, and is also used to control the positive and negative directions of the electric energy output to the motor.

2. The double-chuck electric screwdriver according to claim 1, characterized in that, Torque adjustment rings are rotatably provided at both ends of the screwdriver body, and the torque adjustment rings are used to adjust the output torque of the speed reducer.

3. The dual-chuck electric screwdriver according to claim 2, wherein, The speed reducer includes a planetary speed reducer, and a speed reducer housing is sleeved outside the planetary speed reducer. The speed reducer housing is fixedly connected to the screwdriver body; the reducer housing of the planetary speed reducer is rotatably connected to the speed reducer housing; A connecting cylinder is coaxially and fixedly provided on the end face of the speed reducer housing away from the motor. A slip ring and a torsion ring are sequentially sleeved on the connecting cylinder; the slip ring is axially slidably connected to the connecting cylinder, the torsion ring is threadedly connected to the connecting cylinder, and the torsion ring is clamped with the torque adjustment ring; A plurality of through holes are evenly arranged along the circumference on the periphery of the connecting cylinder, and a ball is arranged in each through hole; A spring that is one-to-one matched with the ball is arranged on one side of the slip ring facing the planetary speed reducer; Triangular bosses are evenly arranged along the circumference on the end face of the output end of the planetary speed reducer, and the number of the bosses is equal to the number of the balls.

4. The double-chuck electric screwdriver according to claim 1, wherein Operation buttons are provided on the screwdriver body in supporting with each motor, and the operation buttons are electrically connected to the control board; a forward rotation button and a reverse rotation button are provided on each operation button; the control board is used to control the on-off and current direction of the current output to the corresponding motor according to the trigger signals of the forward rotation button and the reverse rotation button.

5. The dual-chuck electric screwdriver according to claim 1, characterized in that, A handle is vertically provided in the middle of the screwdriver body, and the battery and the control board are both arranged in the handle.

6. The double-chuck electric screwdriver according to claim 5, wherein, Operation buttons electrically connected to the control board are provided on both sides of the screwdriver body. The operation buttons are arranged beside the handle and are used to control the corresponding motor; a switching button electrically connected to the control board is also provided on the electric screwdriver, and the switching button is used to switch between the left hand mode and the right hand mode.

7. The double chuck electric screwdriver according to claim 1 or 5, characterized in that, The screwdriver body is in a straight cylinder shape.

8. The double-chuck electric screwdriver according to claim 1 or 5, characterized in that, The screwdriver body is in a bent arch shape.

9. The dual-chuck electric screwdriver according to claim 1, wherein A screwdriver bit and a wire stripper are respectively installed in the two chucks.

10. The electric screwdriver with double chucks according to claim 1, wherein, The chuck is provided with an installation hole with an internal hexagon.

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