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CN-116787383-B - Hand-held electric tool

CN116787383BCN 116787383 BCN116787383 BCN 116787383BCN-116787383-B

Abstract

The invention relates to a hand-held electric tool, which comprises a machine shell, a motor assembly, a transmission assembly, a switch assembly and a gear shifting assembly, wherein the switch assembly comprises a switch element and a trigger for triggering the switch element, the switch element is arranged on the machine shell, the gear shifting assembly comprises a gear shifting element connected with the transmission assembly and a button for moving the gear shifting element, the machine shell comprises a main body part for accommodating the motor assembly and the transmission assembly and a holding part connected with the main body part, the switch assembly is arranged on the holding part, the trigger comprises a base body and a limiting part arranged on the base body, the gear shifting assembly comprises a stop part corresponding to the limiting part, the limiting part is abutted against the stop part, so that the trigger cannot be pressed to the bottom, and the button is positioned between the transmission assembly and the switch assembly along the direction of a second axis perpendicular to the first axis of the motor assembly. The handheld electric tool is simple to operate and good in user experience, and can be normally used in a narrow space.

Inventors

  • LIU AIGUO
  • YANG SIHAO

Assignees

  • 江苏东成工具科技有限公司

Dates

Publication Date
20260512
Application Date
20230530

Claims (9)

  1. 1. A hand-held electric tool comprises a casing, a motor assembly and a transmission assembly which are arranged on the casing, a switch assembly connected with the motor assembly and a gear shifting assembly connected with the transmission assembly, the switch assembly comprises a switch element arranged on the shell and a trigger for triggering the switch element, and the gear shifting assembly comprises a gear shifting element connected with the transmission assembly and a button for moving the gear shifting element; The machine shell comprises a main body part for accommodating the motor assembly and the transmission assembly and a holding part connected with the main body part, and the switch assembly is arranged on the holding part, and is characterized in that the trigger comprises a base body and a limit part arranged on the base body, the gear shifting assembly comprises a stop part corresponding to the limit part, the base body comprises a first slideway space and a second slideway space for the stop part to move, the limit part is arranged in at least one of the first slideway space and the second slideway space, and the limit part is abutted against the stop part, so that the trigger cannot be pressed to the bottom; The motor assembly has a first axis extending in a front-to-rear direction, the button moves in a second axis direction perpendicular to the first axis, the button is located between the transmission assembly and the switch assembly, and the stopper is connected to the button and moves with the movement of the button.
  2. 2. The hand-held power tool according to claim 1, wherein the stop is connected to the button, the stop being located between the button and the trigger.
  3. 3. The hand-held power tool according to claim 1, wherein the switch assembly is a speed-adjusting switch and the output rotation speed of the motor assembly is adjusted by a pressing stroke of the trigger, and the limit portion abuts against the stop portion to limit the maximum output rotation speed of the motor assembly.
  4. 4. The hand-held power tool of claim 1, wherein the hand-held power tool includes a control assembly that controls the motor assembly, and wherein the switch assembly is electrically connected to the control assembly.
  5. 5. The hand-held power tool according to claim 4, wherein the control unit is disposed on the grip portion, and the control unit and the button are disposed on both sides of the switch unit.
  6. 6. The hand-held power tool according to claim 4, wherein the control assembly is disposed on the main body portion and the control assembly is located on a rear side of the motor assembly.
  7. 7. The hand-held power tool according to claim 1, wherein the grip portion and the main body portion are disposed at an angle, and the housing includes a coupling portion provided at an end of the grip portion, and a battery pack for powering the motor assembly is detachably mounted to the coupling portion.
  8. 8. The hand-held power tool of claim 1, wherein the stop is located between the button and the base, the shift assembly includes an adjustment plate coupled to the button and the stop, the adjustment plate having a pivot point coupled to the switch element about which the adjustment plate rotates when the button is moved in the second axial direction, and the stop slides on the base.
  9. 9. The hand-held power tool according to claim 8, wherein the stop is located at least partially between the trigger and the switch element.

Description

Hand-held electric tool [ Field of technology ] The invention relates to the field of electric tools, in particular to a handheld electric tool for decoration, construction and other occasions. [ Background Art ] A power tool is a type of apparatus in which a working head is driven by a motor assembly to reciprocate, and a planetary gear reduction device is typically provided between the motor assembly and the working head in order to convert a high-rotational-speed low-torque force of the motor assembly into a low-rotational-speed high-torque force required by a user. With the increasing of user's demand, the handheld electric tool in market especially relates to the product of electric drill class at present, still can set up speed change gear on planetary gear reduction unit, and the user can be according to actual user demand to the output rotational speed of electric drill. The speed change device of a conventional electric drill is provided with a high-rotation speed gear and a low-rotation speed gear, and is manually switched by a gear shifting mechanism. The gear shifting mechanism in the prior art can be referred to the Chinese patent number 200820216154.4 published in 11/18 of 2009, which discloses an electric drill, comprising a casing, a handle, a motor, a gear box and a speed adjusting shifting button, wherein the speed adjusting shifting button is arranged at the top of the casing. However, the speed adjusting dial is arranged at the top of the electric drill, so that the electric drill has the following problems that firstly, a user has to cooperatively finish the gear switching through two hands, the operation is complex and the experience is poor, and secondly, the electric drill cannot be used in a narrow space due to the fact that the housing occupies a large height in the up-down direction due to the position limitation of the speed adjusting dial. Besides, in the electric tool adopting the planetary gear speed reducing device, the speed reducing ratio of each stage is 1+Z3/Z1 due to a theoretical model of a planetary gear, wherein Z3 is the number of teeth of an inner gear ring, Z1 is the number of teeth of a sun gear, and the speed reducing ratio of each stage of planetary gear is not lower than 3, and when an electric drill is designed, if the rotation speed ratio of a high speed gear to a low speed gear is required to be lower than 3, the traditional planetary gear speed reducing device cannot be basically realized, so that the diversified operation demands of users cannot be met. In view of the above, it is desirable to provide an improved hand-held power tool that overcomes the shortcomings of the prior art. [ Invention ] Aiming at the defects of the prior art, the invention aims to provide a handheld electric tool which is simple and convenient to operate and has wider applicability. The hand-held electric tool comprises a machine shell, a motor assembly, a transmission assembly, a switch assembly and a gear shifting assembly, wherein the motor assembly and the transmission assembly are installed on the machine shell, the switch assembly is connected to the motor assembly, the gear shifting assembly is connected to the transmission assembly and comprises a switch element installed on the machine shell and a trigger for triggering the switch element, the gear shifting assembly comprises a gear shifting element connected to the transmission assembly and a button for moving the gear shifting element, the machine shell comprises a main body part for accommodating the motor assembly and the transmission assembly and a holding part connected to the main body part, the switch assembly is installed on the holding part, the trigger comprises a base body and a limiting part arranged on the base body, the gear shifting assembly comprises a stop part corresponding to the limiting part, the limiting part is abutted to the stop part, the trigger cannot be pressed to the bottom, the motor assembly is provided with a first axis extending along the front-back direction, the button moves along the direction of a second axis perpendicular to the first axis, and the button is located between the transmission assembly and the switch assembly. The further improvement is that the stop part is connected with the button, and the stop part is positioned between the button and the trigger. The further improvement scheme is that the switch component is a speed regulating switch and adjusts the output rotating speed of the motor component through the pressing stroke of the trigger, and the limiting part is abutted to the stop part so as to limit the maximum output rotating speed of the motor component. The handheld electric tool comprises a control assembly for controlling the motor assembly, and the switch assembly is electrically connected with the control assembly. The control assembly is arranged on the holding part, and the control assembly and the button are arranged on two sides of the switch assembly.