Brushless pressing type electric screwdriver

Abstract

The utility model discloses a brushless down-pressing type electric screw driver which comprises a main shaft and a tool bit connected to the main shaft, the tool bit is used for being matched with a screw, the main shaft is used for driving the tool bit to rotate, and the main shaft can drive the tool bit to move in the axial direction of the tool bit; the driving device is used for driving the main shaft to rotate; the reset mechanism is used for driving the main shaft to move towards one side of the tool bit; and the control switch is electrically connected with the driving device, and the control switch is used for controlling the driving device to work according to the position of the main shaft in the axial direction. During use, the control switch can control the driving device to act by pressing down the tool bit and the main shaft, so that the driving device drives the main shaft and the tool bit to rotate, and the screw locking work is completed. In this way, the action of manually pressing the switch can be omitted in the screw locking process, and the screw turning efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric screwdrivers, and particularly relates to a brushless down-press type electric screwdriver. Background Art

[0002] In the related art, when using an electric screwdriver, after the tool bit is aligned with the screw, it is necessary to control the switch to drive the tool bit to rotate through the motor, so as to lock or loosen the screw. In the scenario of screwing a large number of screws, frequent rotation through the control switch will reduce the efficiency of screwing the screws. Content of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides a brushless down-press type electric screwdriver, which can drive the tool bit to rotate by pressing down the tool bit to control the driving mechanism, thereby facilitating the improvement of work efficiency.

[0004] The brushless down-press type electric screwdriver according to an embodiment of the utility model includes:

[0005] A main shaft and a tool bit connected to the main shaft, the tool bit is used for cooperating with the screw, the main shaft is used for driving the tool bit to rotate, and the main shaft can drive the tool bit to move along its own axial direction;

[0006] A driving device for driving the main shaft to rotate;

[0007] A reset mechanism for driving the main shaft to move towards the tool bit side; and

[0008] A control switch electrically connected to the driving device, and the control switch is used for controlling the driving device to work according to the position of the main shaft in the axial direction.

[0009] Further, the control switch includes an electromagnetic start switch, an electromagnetic stop switch, an electromagnet and a push rod. One end of the push rod abuts against the main shaft, the other end of the push rod is connected to the electromagnet. The electromagnetic start switch and the electromagnetic stop switch are arranged at intervals along the axial direction of the push rod, and the electromagnetic stop switch is closer to the end of the push rod than the electromagnetic start switch. The electromagnet is electrically connected to the driving device, and the reset mechanism is used for driving the push rod to move towards the tool bit side.

[0010] Further, the reset mechanism includes a spring, and the spring is sleeved on the outer periphery of the push rod, and is used for driving the push rod to move towards the tool bit side.

[0011] Further, the control switch includes a sliding shaft, the sliding shaft is connected to one end of the ejector rod close to the main shaft, a sliding groove is provided on one side of the main shaft close to the ejector rod, and the sliding shaft is movably arranged in the sliding groove.

[0012] Further, the control switch includes a ball, a first receiving groove is provided in the middle of the sliding shaft, a second receiving groove is provided at a position corresponding to the first receiving groove on the main shaft, and a receiving space for placing the ball is enclosed by the first receiving groove and the second receiving groove.

[0013] Further, the driving device includes a brushless motor, the brushless motor is provided with a channel for the ejector rod to pass through, and the electromagnetic start switch and the electromagnetic stop switch are arranged on one side of the brushless motor away from the tool bit.

[0014] Further, the driving device includes a first transmission gear, a second transmission gear, a first mounting member, a third transmission gear, a fourth transmission gear and a second mounting member. The first transmission gear is connected to the output end of the brushless motor. The second transmission gear is rotatably mounted on the first mounting member. A rotating gear is provided on one side of the first mounting member close to the tool bit. The third transmission gear is an internal gear. Different positions of the second transmission gear are respectively engaged with the first transmission gear and the third transmission gear. The fourth transmission gear is mounted on the second mounting member. Different positions of the fourth transmission gear are respectively engaged with the third transmission gear and the rotating gear. The second mounting member is fixedly connected to the main shaft.

[0015] Further, the number of the second transmission gears is three.

[0016] Further, the number of the fourth transmission gears is three.

[0017] Further, it further includes a hollow housing. The main shaft, the driving device and the control switch are arranged in the housing, and a hand-held part is provided on the outer periphery of the housing.

[0018] According to the brushless down-pressing electric screwdriver of the embodiment of the present invention, it has at least the following beneficial effects: When in use, by pressing down the tool bit and the main shaft, the control switch can control the driving device to act, so that the driving device drives the main shaft and the tool bit to rotate to complete the screw locking work. After the locking is completed, moving the main shaft toward the side away from the tool bit can make the control switch control the driving device to stop working. In this way, the action of manually pressing the switch can be omitted during the process of locking the screw, which helps to improve the efficiency of screwing the screw.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings

[0020] The following further describes the present utility model in conjunction with the drawings and embodiments, where:

[0021] Figure 1 is a schematic diagram of the overall structure of a brushless push-down electric screwdriver according to an embodiment of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure of a brushless push-down electric screwdriver according to an embodiment of the present utility model from another perspective;

[0023] Figure 3 is a schematic diagram of the structure of a brushless push-down electric screwdriver according to an embodiment of the present utility model from another perspective;

[0024] Figure 4 is a partial schematic diagram of the structure of a brushless push-down electric screwdriver according to an embodiment of the present utility model;

[0025] Figure 5 is a sectional view schematic diagram of a brushless push-down electric screwdriver according to an embodiment of the present utility model;

[0026] Figure 6 is Figure 5 a partially enlarged schematic diagram of part A in

[0027] Figure 7 is Figure 5 a partially enlarged schematic diagram of part B in

[0028] Reference Signs:

[0029] 110, tool bit; 111, engagement groove; 120, power interface; 130, main shaft; 131, sliding groove; 132, second receiving groove;

[0030] 200, housing; 210, hand-held part;

[0031] 310, electromagnetic start switch; 320, electromagnetic stop switch; 330, electromagnet; 340, ejector rod; 350, sliding shaft; 351, first receiving groove; 360, spring;

[0032] 410, brushless motor; 420, first transmission gear; 430, second transmission gear; 440, third transmission gear; 450, first mounting member; 451, rotating gear; 460, fourth transmission gear; 470, second mounting member; 480, connection structure. Detailed Embodiments

[0033] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0034] In the description of the present utility model, it should be understood that with regard to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 utility model.

[0035] In the description of the present utility model, the meaning of several is more than one, and the meaning of multiple is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0036] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0037] In the description of the present utility model, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0038] See Figures 1 to 5 , an embodiment of the present application discloses a brushless down-pressing electric screwdriver, which includes a main shaft 130, a tool bit 110, a driving device, a reset mechanism, and a control switch.

[0039] Specifically, the cutter head 110 is connected to the main shaft 130. The cutter head 110 is used to cooperate with a screw, and the main shaft 130 is used to drive the cutter head 110 to rotate. Moreover, the main shaft 130 can drive the cutter head 110 to move along its own axial direction; the driving device is used to drive the main shaft 130 to rotate; the reset mechanism is used to drive the main shaft 130 to move toward the cutter head 110 side; and the control switch is electrically connected to the driving device. The control switch is used to control the operation of the driving device according to the position of the main shaft 130 in the axial direction. Among them, the cutter head 110 has a biting groove 111, and the biting groove 111 is used to cooperate with a screw.

[0040] During use, by pressing down the cutter head 110 and the main shaft 130, the control switch can control the driving device to act, so that the driving device drives the main shaft 130 and the cutter head 110 to rotate to complete the screw locking work. After the locking is completed, moving the main shaft 130 toward the side away from the cutter head 110 can make the control switch control the driving device to stop working. In this way, the action of manually pressing the switch can be omitted during the process of screwing the screw, which helps to improve the efficiency of screwing the screw.

[0041] In some embodiments of the present application, the control switch includes an electromagnetic start switch 310, an electromagnetic stop switch 320, an electromagnet 330, and a push rod 340. One end of the push rod 340 abuts against the main shaft 130, and the other end of the push rod 340 is connected to the electromagnet 330. The electromagnetic start switch 310 and the electromagnetic stop switch 320 are arranged at intervals along the axial direction of the push rod 340, and the electromagnetic stop switch 320 is closer to the end of the push rod 340 than the electromagnetic start switch 310. The electromagnet 330 is electrically connected to the driving device, and the reset mechanism is used to drive the push rod 340 to move toward the cutter head 110 side. Among them, when the cutter head 110 is not pressed down, the electromagnet 330 senses the electromagnetic stop switch 320. At this time, the electromagnet 330 controls the driving device to stop working.

[0042] In the above embodiment, when the cutter head 110 is pressed down, the push rod 340 moves synchronously along the axial direction of the main shaft 130 with the cutter head 110, so that the electromagnet 330 moves toward the side close to the electromagnetic start switch 310. The electromagnet 330 senses the electromagnetic start switch 310, thereby controlling the driving device to start, so that the driving device can drive the cutter head 110 to rotate. When the external force acting on the cutter head 110 is removed, the spring 360 drives the push rod 340 to reset, and the push rod 340 synchronously drives the electromagnet 330 to move toward the side close to the electromagnetic stop switch 320, so that the electromagnet 330 senses the electromagnetic stop switch 320, thereby controlling the driving device to stop working.

[0043] In some embodiments of the present application, see Figure 5 and Figure 6The reset mechanism includes a spring 360, which is sleeved on the outer circumference of the push rod 340 and is used to drive the push rod 340 to move toward the side of the cutter head 110. Specifically, one end of the spring 360 is against the bracket, and the other end is directly or indirectly connected to the push rod 340. When the cutter head 110 is not pressed down, the spring 360 is in a natural state or a compressed state; when the cutter head 110 is pressed down (that is, the cutter head 110 is supported and moves along the main shaft 130 toward the end of the main shaft 130 where the cutter head 110 is not set), the spring 360 continues to be compressed. When the external force acting on the cutter head 110 is removed, the push rod 340 can be reset under the action of the spring 360.

[0044] In the above embodiment, when the cutter head 110 is pressed down, the electromagnetic device 330 senses the electromagnetic start switch 310, thereby controlling the drive device to start, so that the drive device can drive the cutter head 110 to rotate. When the external force acting on the cutter head 110 is removed, the spring 360 drives the push rod 340 to reset, and the push rod 340 simultaneously drives the electromagnetic device 330 to move toward the side close to the electromagnetic stop switch 320, so that the electromagnetic device 330 senses the electromagnetic stop switch 320, thereby controlling the drive device to stop working.

[0045] In some embodiments of this application, please continue to refer to Figure 5 and Figure 6 The control switch includes a sliding shaft 350 , which is connected to one end of the push rod 340 close to the main shaft 130 . A sliding groove 131 is provided on one side of the main shaft 130 close to the push rod 340 , and the sliding shaft 350 is movably arranged in the sliding groove 131 .

[0046] Furthermore, the control switch includes a rolling ball, a first receiving groove 351 is provided in the middle of the sliding shaft 350, a second receiving groove 132 is provided at a position of the main shaft 130 corresponding to the first receiving groove 351, and a receiving space for placing the rolling ball is enclosed by the first receiving groove 351 and the second receiving groove 132. In this way, when the cutter head 110 is pressed down, the main shaft 130 can push the sliding shaft 350 to move through the rolling ball; when the external force acting on the cutter head 110 is removed, the sliding shaft 350 can push the main shaft 130 to reset through the rolling ball.

[0047] In some embodiments of the present application, see Figure 5 The driving device includes a brushless motor 410 , and the brushless motor 410 is provided with a channel for the ejector rod 340 to pass through. The electromagnetic start switch 310 and the electromagnetic stop switch 320 are arranged on a side of the brushless motor 410 away from the cutter head 110 .

[0048] In some embodiments of the present application, see Figure 5 and Figure 7, the driving device includes a first transmission gear 420, a second transmission gear 430, a first mounting member 450, a third transmission gear 440, a fourth transmission gear 460 and a second mounting member 470. The first transmission gear 420 is connected to the output end of the brushless motor 410. The second transmission gear 430 is rotatably mounted on the first mounting member 450. A rotating gear 451 is provided on one side of the first mounting member 450 close to the tool bit 110. The third transmission gear 440 is an internal gear. Different positions of the second transmission gear 430 are respectively engaged with the first transmission gear 420 and the third transmission gear 440. The fourth transmission gear is mounted on the second mounting member 470. Different positions of the fourth transmission gear are respectively engaged with the third transmission gear and the rotating gear 451. The second mounting member 470 is fixedly connected to the main shaft 130.

[0049] In a possible implementation manner, referring to Figure 5 and Figure 7 , the brushless down - pressure electric screwdriver further includes a connection structure 480. The connection structure 480 is fixedly connected to the second mounting member 470, and the other end of the connection structure 480 is connected to the main shaft 130.

[0050] In some embodiments of the present application, referring to Figure 5 and Figure 7 , the number of the second transmission gears is three. Specifically, the three second transmission gears are respectively rotatably mounted on the first mounting member 450 through rotating shafts, and the three second transmission gears are evenly spaced on the outer periphery of the first transmission gear 420.

[0051] In some embodiments of the present application, referring to Figure 5 and Figure 7 , the number of the fourth transmission gears is three. Specifically, the three fourth transmission gears are respectively rotatably mounted on the second mounting member 470 through rotating shafts, and the three fourth transmission gears are evenly spaced on the outer periphery of the rotating gear 451.

[0052] In some embodiments of the present application, referring to Figure 1 , the brushless down - pressure electric screwdriver further includes a hollow housing 200. The main shaft 130, the driving device and the control switch are arranged in the housing 200. A handheld part 210 is arranged on the outer periphery of the housing 200 to facilitate the operator to hold the electric screwdriver.

[0053] In this embodiment, referring to Figure 1 , the brushless down - pressure electric screwdriver has a power interface 120.

[0054] In a possible implementation manner, the brushless down - pressure electric screwdriver includes a power adapter. The adapter is used to supply electricity to the driving device. Among them, the power interface 120 is used to supply power to the power adapter and the storage battery.

[0055] In a possible implementation manner, the power interface 120 is used to directly electrically connect the brushless push-down electric screwdriver to a power supply.

[0056] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the knowledge scope of those of ordinary skill in the art to which the present utility model pertains, various changes can be made without departing from the gist of the present utility model. In addition, the embodiments of the present utility model and the features in the embodiments can be combined with each other without conflict.

Claims

1. A brushless down-pressing electric screwdriver, characterized in that, Comprising: A main shaft and a tool bit connected to the main shaft, the tool bit being used to cooperate with a screw, and the main shaft being used to drive the tool bit to rotate, and the main shaft being capable of driving the tool bit to move along its own axial direction; A driving device for driving the main shaft to rotate; A reset mechanism for driving the main shaft to move towards the tool bit side; And A control switch, electrically connected to the driving device, the control switch being used to control the operation of the driving device according to the position of the main shaft in the axial direction The control switch includes an electromagnetic start switch, an electromagnetic stop switch, an electromagnet and a push rod. One end of the push rod abuts against the main shaft, and the other end of the push rod is connected to the electromagnet. The electromagnetic start switch and the electromagnetic stop switch are arranged at intervals along the axial direction of the push rod, and the electromagnetic stop switch is closer to the end of the push rod than the electromagnetic start switch. The electromagnet is electrically connected to the driving device, and the reset mechanism is used to drive the push rod to move towards the tool bit side.

2. The brushless down-pressing electric screwdriver according to claim 1, wherein The reset mechanism includes a spring, 3. The brushless down-pressing electric screwdriver according to claim 2, wherein The spring is sleeved on the outer periphery of the push rod and is used to drive the push rod to move towards the tool bit side. The control switch includes a sliding shaft, the sliding shaft is connected to the end of the push rod close to the main shaft, and a sliding groove is arranged on the side of the main shaft close to the push rod, and the sliding shaft is movably arranged in the sliding groove.

4. The brushless down-pressing electric screwdriver according to claim 3, wherein The control switch includes a rolling ball. A first accommodation groove is arranged in the middle of the sliding shaft, and a second accommodation groove is arranged on the main shaft corresponding to the first accommodation groove. The first accommodation groove and the second accommodation groove enclose an accommodation space for placing the rolling ball.

5. The brushless down-pressing electric screwdriver according to claim 4, characterized in that The driving device includes a brushless motor, and the brushless motor is provided with a channel for the push rod to pass through. The electromagnetic start switch and the electromagnetic stop switch are arranged on the side of the brushless motor away from the tool bit.

6. The brushless down-pressing electric screwdriver according to claim 2, wherein, The driving device includes a first transmission gear, a second transmission gear, a first mounting member, a third transmission gear, a fourth transmission gear and a second mounting member. The first transmission gear is connected to the output end of the brushless motor. The second transmission gear is rotatably mounted on the first mounting member. A rotating gear is arranged on the side of the first mounting member close to the tool bit. The third transmission gear is an internal gear. Different positions of the second transmission gear are respectively meshed with the first transmission gear and the third transmission gear. The fourth transmission gear is mounted on the second mounting member. Different positions of the fourth transmission gear are respectively meshed with the third transmission gear and the rotating gear. The second mounting member is fixedly connected to the main shaft.

7. The brushless down-pressing electric screwdriver according to claim 6, wherein, The number of the second transmission gears is three.

8. The brushless down-pressing electric screwdriver according to claim 7, wherein, The number of the fourth transmission gears is three.

9. The brushless down-pressing electric screwdriver according to claim 7, wherein, It further includes a hollow housing. The main shaft, the driving device and the control switch are arranged in the housing, and a handheld part is arranged on the outer periphery of the housing.

10. The brushless push-down electric screwdriver according to claim 1, wherein, ​

Images