Electric screwdriver

Abstract

The utility model discloses an electric screwdriver which comprises a shell, a screwdriver head fixing piece, a motor, a control mainboard, a switch and a plug, the screwdriver head fixing piece and the plug are arranged at the two ends of the shell respectively, the screwdriver head fixing piece is used for fixing a screwdriver head, the plug is used for being connected with an external control unit, the switch is arranged on the side edge of the shell, and the switch is connected with the motor. The motor and the control main board are arranged in the shell, the control main board is electrically connected with the motor and the plug, a Hall sensing module is arranged on the control main board, a magnetic block matched with the Hall sensing module is arranged at one end of the switch, and the magnetic block is matched with the Hall sensing module to control the motor to be turned on and turned off. The Hall element is used for the key, so that the service life of the key is ensured, and the key hand feeling is ensured; the output shaft of the driving part simultaneously uses the characteristics of a hexagon and a circular shaft, so that the matching concentricity of the bit assembly is ensured while the torque is transmitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric screwdriver technical field, concretely is a kind of electric screwdriver. BACKGROUND

[0002] Electric screwdriver, alias electric batch, electric screwdriver, is used for the electric tool of screwing and loosening screw.The electric tool is equipped with the mechanism of adjusting and limiting torque, mainly used for assembly line, is one of the tools of most production enterprises.

[0003] With the development of electric screwdriver, the function of existing screwdriver can meet market demand, so the service life and convenience of screwdriver are also pursued, such as how to improve the switch life of screwdriver, because the switch of traditional screwdriver is all point press type structure, the service life of this structure is limited, and poor contact phenomenon is prone to occur in long-term use, and then improving the stability of rotation is also a problem to be solved, because general bit fixing piece is split type structure with electric screwdriver main body, and loose phenomenon can also appear after long time, and this problem remains to be solved. INVENTION CONTENTS

[0004] (I) technical scheme

[0005] To solve the above technical problems, the utility model provides an electric screwdriver.

[0006] Specific technical scheme is:

[0007] An electric screwdriver, including shell, bit fixing piece, motor, control mainboard, switch and plug, the bit fixing piece and the plug are respectively arranged at both ends of the shell, the bit fixing piece is used for fixing bit, the plug is used for connecting external control unit, the shell side is equipped with the switch, the shell interior is equipped with the motor and the control mainboard, the control mainboard is electrically connected with the motor and the plug, the control mainboard is equipped with hall induction module, one end of the switch is equipped with the magnetic block matched with the hall induction module, and the motor switch is controlled by the magnetic block matched with the hall induction module.

[0008] Further, the shell includes left body and right body, the left body and right body are fixed by buckle and / or screw, the left body and right body are equipped with limiting strip and protrusion for fixing motor inside, the end of the motor is equipped with limiting ring corresponding to the protrusion, the head of the motor is equipped with threaded portion, and the bit fixing piece is equipped with internal thread matched with the threaded portion.

[0009] Further, the limiting strip is arc-shaped, the inner wall radius of the limiting strip is same with the radius of the motor, the limiting ring both sides are equipped with vertical surface, and the protrusion corresponds to the vertical surface.

[0010] Further, the batch head fixing member comprises a sleeve, an output shaft and a bearing, the output shaft and the bearing are arranged in the sleeve, an inner thread is arranged on the inner wall of one end of the sleeve and matched with the threaded part, a first slot is arranged on one end of the output shaft and connected with the transmission shaft of the motor, the shape of the first slot and the output shaft of the motor is hexagonal, a second slot is arranged on the other end of the output shaft and connected with the batch head, the bearing is fixed on the outer wall of the output shaft, a cavity is arranged in the sleeve and used for placing the output shaft and the bearing, gaskets are arranged on the two sides of the bearing and used for fixing the bearing, and the movable ring is arranged on one end close to the second slot and used for fixing and releasing the batch head.

[0011] Further, the batch head is inserted into the second slot, the second slot is provided with an annular groove and a set of symmetrical limiting blocks, the end of the second slot is provided with a notch corresponding to the limiting block, a set of symmetrical through holes are arranged on the output shaft and matched with the movable beads, the movable beads are matched with the annular groove on the batch head, the movable ring is adjusted to control the movable beads to clamp the batch head on the batch head fixing member.

[0012] Further, the inner wall of the movable ring and the outer wall of the output shaft form a cavity, and a first spring is arranged in the cavity.

[0013] Further, a thimble is arranged in the output shaft and can slide in the output shaft, a second spring is arranged on the side close to the first slot of the thimble, and the second spring is in a compressed state when the batch head is inserted into the second slot.

[0014] (II) Beneficial effects

[0015] Compared with the prior art, the technical scheme of the utility model discloses that the key uses the hall element to guarantee the key life, and simultaneously guarantees the key feeling, the output shaft of the driving part simultaneously uses the hexagonal and round shaft features, in the transmission torque, and guarantee the concentricity of batch head assembly cooperation again, the output shaft on the batch head fixing member is matched with the output shaft of the driving motor, the structure is simple, the driving motor is combined together with the screwdriver only through a transmission shaft, and transmission is more stable. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without the creative labor.

[0017] Figure 1 It is the structural schematic diagram of the utility model.

[0018] Figure 2 It is a schematic view of the end structure of the batch head.

[0019] Figure 3 It is a top view of the utility model.

[0020] Figure 4 It is a sectional view of the utility model.

[0021] Figure 5 It is a schematic view of the fixed part structure of the batch head. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. The described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model protection.

[0023] In the related prior art, the switch of the traditional screwdriver is a point press type structure. The service life of this structure is limited, and the long-term use can cause the phenomenon of poor contact. Secondly, improving the stability of rotation is also a problem to be solved. Because the general fixed part of the batch head is a split type structure with the main body of the electric screwdriver, the loosening phenomenon can occur after a long time, and this problem also needs to be solved.

[0024] To solve the problems in the related prior art, the utility model provides an electric screwdriver, and the principles and structures of the utility model will be described in detail below in combination with the drawings and embodiments.

[0025] Please refer to Figures 1 to 5The utility model provides a kind of electric screwdriver, including shell 1, batch head fixing piece 2, motor 3, control mainboard 4, switch 5 and plug 6, shell 1 overall is cylindrical, batch head fixing piece 2 and plug 6 are respectively arranged in shell 1 both ends, batch head fixing piece 2 is used to fix batch head, plug 6 is used to connect external control unit, shell 1 side is equipped with switch 5, shell 1 inside is equipped with motor 3 and control mainboard 4, control mainboard 4 is electrically connected with motor 3 and plug 6, control mainboard 4 is equipped with hall induction module 7, one end of switch 5 is equipped with the magnetic block 8 matched with hall induction module 7, motor 3 switch is controlled by the cooperation of magnetic block 8 and hall induction module 7, hall induction module forms potential difference using the position of hall element in magnetic field, switch is controlled by potential difference, again in the embodiment, the middle part of switch 5 is connected with shell 1 by bolt, one end extends into the inside of shell 1, and a magnetic block 8 is fixed on its upper portion, the magnetic block 8 corresponds with the hall induction module 7 on control mainboard 4, the magnetic block 8 is unique by switch control, realize the position of hall induction module in magnetic field, to realize the purpose of control switch, while spring can be set on one end of switch 5 to reset, and two groups of above-mentioned switch structures are set in the embodiment, to control the forward rotation and reverse rotation of motor, the service life of button is ensured by using hall element, and the button feel is also ensured.

[0026] Please refer to Figure 3 And Figure 4 Shell 1 includes left body 1a and right body 1b, left body 1a and right body 1b are fixed by buckle and / or screw, and the inside of left body 1a and right body 1b is provided with a limiting strip 9 and a protrusion 10 for fixing the motor 3, the motor 3 is cylindrical in whole, the end of the motor 3 is provided with a limiting ring 11 corresponding to the protrusion 10, the head of the motor 3 is provided with a threaded part 12, the batch head fixing piece 2 is provided with an internal thread matched with the threaded part 12, the limiting strip 9 is arc-shaped, and the radius of the inner wall of the limiting strip 9 is the same as the radius of the motor 3, the limiting ring 11 is provided with vertical faces on both sides, the protrusion 10 corresponds to the vertical faces, a cavity corresponding to the shape of the motor 3 is formed by the multiple limiting strips 9 on both sides, the motor 3 is placed in the cavity, a limiting ring is arranged at the end of the motor, and a shape corresponding to the limiting ring is arranged in the shell 1, so that the rotation of the motor 3 in the shell 1 is prevented, and finally the threaded part 12 at the head of the motor 3 is directly connected with the batch head fixing piece, so that the batch head fixing piece is directly connected with the motor instead of being connected with the shell 1, because the shell is usually made of plastic material, the threaded connection is prone to loosening over time, the head of the motor can be made of metal material, and the batch head fixing piece is also made of metal material, so that the unstable connection and the resulting poor transmission can be prevented.

[0027] Please refer to Figure 5, the batch head fixing part 2 includes a sleeve 2a, an output shaft 2b, a bearing 2c and a movable ring 2d, the output shaft 2b and the bearing 2c are arranged inside the sleeve 2a, an inner thread is arranged on the inner wall of one end of the sleeve 2a and matched with the threaded part 12, a first slot for connecting the transmission shaft of the motor is arranged on one end of the output shaft 2b, the first slot is hexagonal in shape, the other end of the output shaft 2b extends to the outside of the sleeve 2a and is provided with a second slot for connecting the batch head, the bearing 2c is fixed on the outer wall of the output shaft 2b, a cavity for placing the output shaft 2b and the bearing 2c is arranged inside the sleeve 2a, gaskets 2e are arranged on both sides of the bearing 2c for fixing the bearing 2c, and the movable ring 2d is arranged at one end close to the second slot for fixing and releasing the batch head. The bearing is fixed inside the sleeve 2a through the gaskets, so as to fix the output shaft 2b, the transmission shaft of the motor 3 is inserted into the first slot, the motor drives the output shaft 2b to rotate, and finally drives the batch head inserted into the second slot to rotate.

[0028] Please refer to Figure 2 , and the batch head 13 is inserted into the second slot and provided with an annular groove 13a and a set of symmetrical limiting blocks 13b at one end, the second slot is provided with a notch corresponding to the limiting blocks 13b, the limiting blocks 13b are matched with the notch to realize synchronous rotation of the output shaft 2b and the batch head, a set of symmetrical through holes are arranged on the output shaft 2b, movable beads 2f are arranged in the through holes and matched with the annular groove 13a on the batch head 13, the batch head 13 is clamped on the batch head fixing part 2 by adjusting the position of the movable ring 2d and controlling the movable beads 2f, specifically, a convex ring corresponding to the movable beads 2f is arranged inside the movable ring 2d, when the convex ring reaches the position corresponding to the movable beads 2f, the convex ring extrudes the movable beads 2f to the inside of the sleeve 2a, so that the movable beads 2f are partially clamped in the annular groove 13b, when the convex ring is misaligned with the movable beads 2f, the movable beads 2f are repositioned, so that the batch head can be pulled out.

[0029] Specifically, the inner wall of the movable ring 2d and the outer wall of the output shaft 2b form a cavity, a first spring 14 is arranged in the cavity, and the first spring 14 is used to ensure that the convex ring of the movable ring 2d always extrudes the movable beads 2f to the annular groove 13a.

[0030] A thimble 2g is further arranged in the output shaft 2b and can slide in the output shaft 2b, the thimble 2g is provided with a second spring 2h on the side close to the first slot, when the batch head 13 is inserted into the second slot, the second spring 2h is in a compressed state, so that the batch head 13 can be popped out by the second spring 2h when it is needed to be taken out, and the batch head is convenient to take out.

[0031] The above merely is preferred embodiment of the present utility model, and is not used for limiting the present utility model, for the person skilled in the art, the present utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the present utility model should be contained in the protection scope of the present utility model.

Claims

1. A power screwdriver characterized by: The utility model provides a kind of electric screwdriver, including shell (1), bit fixing piece (2), motor (3), control mainboard (4), switch (5) and plug (6), the bit fixing piece (2) and the plug (6) are respectively arranged in the both ends of the shell (1), the bit fixing piece (2) is used to fix bit, the plug (6) is used to connect external control unit, the shell (1) side is equipped with the switch (5), the shell (1) inside is equipped with the motor (3) and the control mainboard (4), the control mainboard (4) is electrically connected with the motor (3) and the plug (6), the control mainboard (4) is equipped with Hall induction module (7), one end of the switch (5) is equipped with the magnetic block (8) cooperation with the Hall induction module (7), and the motor (3) switch is controlled by magnetic block (8) and Hall induction module (7) cooperation.

2. The electric screwdriver according to claim 1, characterized in that: The shell (1) includes left body (1a) and right body (1b), the left body (1a) and right body (1b) are fixed by buckle and / or screw, the left body (1a) and right body (1b) are equipped with the limit strip (9) and the protrusion (10) for fixing motor (3) inside, the end of the motor (3) is equipped with the limit ring (11) corresponding with the protrusion (10), the head of the motor (3) is equipped with threaded portion (12), and the bit fixing piece (2) is equipped with internal thread cooperation with threaded portion (12).

3. The electric screwdriver according to claim 2, characterized in that: The limit strip (9) is arc-shaped, and the inner wall radius of the limit strip (9) is the same as the radius of the motor (3), and the limit ring (11) is equipped with vertical surface on both sides, and the protrusion (10) corresponds to the vertical surface.

4. The electric screwdriver according to claim 2, characterized in that: The bit fixing piece (2) includes sleeve (2a), output shaft (2b), bearing (2c) and movable ring (2d), the output shaft (2b) and bearing (2c) are arranged in the sleeve (2a), the inner wall of one end of the sleeve (2a) is equipped with internal thread cooperation with the threaded portion (12), one end of the output shaft (2b) is equipped with the first slot connected with motor transmission shaft, the shape of the first slot and motor output shaft is hexagonal, the other end is equipped with the second slot connected with bit, the bearing (2c) is fixed on the outer wall of the output shaft (2b), the cavity for placing the output shaft (2b) and the bearing (2c) is arranged in the sleeve (2a), the bearing (2c) is further equipped with gasket (2e) on both sides for fixing the bearing (2c), and the movable ring (2d) is arranged at one end close to the second slot for fixing and releasing bit.

5. The electric screwdriver according to claim 4, characterized in that: Further including bit (13), the bit (13) is inserted in the second slot end and equipped with annular groove (13a) and a set of symmetrical limit block (13b), the end of the second slot is equipped with the notch corresponding with the limit block (13b), a set of symmetrical through holes are arranged on the output shaft (2b), and the movable bead (2f) is arranged in the through hole, the movable bead (2f) corresponds to the annular groove (13a) on the bit (13), and the bit (13) is clamped on the bit fixing piece (2) by adjusting the position of the movable ring (2d) to control the movable bead (2f).

6. The electric screwdriver according to claim 5, characterized in that: The inner wall of the movable ring (2d) and the outer wall of the output shaft (2b) form a cavity, and a first spring (14) is arranged in the cavity.

7. The electric screwdriver according to claim 5, characterized in that: A thimble (2g) is further arranged in the output shaft (2b), the thimble (2g) is slidable in the output shaft (2b), and a second spring (2h) is arranged on the side of the thimble (2g) close to the first slot, when the batch head (13) is inserted into the second slot, the second spring (2h) is in a compressed state.

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