WO2017107492A1

WO2017107492A1 - Multi-functional electric-powered tool

Info

Publication number: WO2017107492A1
Application number: PCT/CN2016/092820
Authority: WO
Inventors: 王春生
Original assignee: 常州赛迪工具有限公司
Priority date: 2015-12-21
Filing date: 2016-08-02
Publication date: 2017-06-29
Also published as: CN205237996U

Abstract

A multi-functional electric-powered tool, comprising a shell, a motor (3), a planetary gear decelerator (4), and a work head (5), the motor (3), the planetary gear decelerator (4), and the work head (5) being mounted in sequence inside the shell, a first belt shaft gear (31) being fixed onto the motor shaft of the motor (3), and a central transmission shaft (43) being disposed inside the planetary gear decelerator (4); the planetary gear decelerator (4) slides along the axial direction and switches between the motor (3) and the work head (5). Arranging in the planetary gear decelerator a central transmission shaft able to work independently and sliding the planetary gear decelerator to implement rotation speed switching of an intermediate transmission mechanism enables the electric-powered tool to simultaneously have two working rotation speeds, so that the electric-powered tool is multi-functional and can act as a screwdriver at a low speed and an electric grinder at a high speed; the structure is simple and operation is convenient.

Description

Multifunctional power tool

Technical field

The utility model relates to a power tool, and more particularly to a multifunctional electric tool with adjustable output speed switching.

Background technique

Power tools have been widely used in many fields. In recent years, DC power tools have become mainstream with their convenient carrying and perfect functions. In DC power tools, pistol drills, electric grinders and screwdrivers are the most commonly used. electrical tools.

At present, these power tools generally have only a single function, that is, a power tool can only perform one kind of work, and in many cases, it is necessary to use a plurality of power tools at the same time, and it is necessary to carry a plurality of power tools at the same time. When used together, it is not only inconvenient to carry, but also requires a lot of money to purchase power tools with different functions.

There are also electric tools that combine two or more functions in the market, but the internal mechanical structure is complicated, and the assembly requirements of the components are high, and the interaction between the functions also affects the stability of each function. In many workplaces, electric grinders and screwdrivers often need to be used at the same time, so it is necessary to combine the electric grinder and screwdriver functions into one power tool for ease of use and to ensure reliable and reliable function.

Summary of the invention

1. Technical problems to be solved by utility models

The purpose of the utility model is to overcome the above-mentioned deficiencies of the existing electric tools, and to provide a multi-functional electric tool, which adopts the technical scheme of the utility model, and provides a self-operating central transmission shaft in the planetary gear reducer through sliding The planetary gear reducer realizes the speed switching of the intermediate transmission mechanism, so that one power tool has two working speeds at the same time, so that the power tool can be multi-functionalized, so that it can be used as a screwdriver at low speed, and can be used as a power at high speed. Grinding, simple structure, easy to operate; at the same time, when used as a screwdriver, it has the function of the elastic screw for forward and reverse switching, and when used as an electric grinder, the push-pull switch can lock the forward and reverse switch, making it Cannot be reversed to ensure security.

2. Technical solutions

In order to achieve the above object, the technical solution provided by the present invention is:

The utility model relates to a multifunctional electric tool, which comprises a casing, a motor, a planetary gear reducer and a working head. The motor, the planetary gear reducer and the working head are sequentially installed in a casing, and the motor shaft of the motor a shaft gear is fixedly connected to the shaft gear, and the planetary gear reducer is provided with a central transmission shaft; the planetary gear reducer is in the motor and the working head Sliding and sliding along its axial direction. When the power input end of the central transmission shaft is connected with the shaft gear transmission, the shaft gear and the planetary gear of the planetary gear reducer are disengaged, and the power output end of the central transmission shaft and the working head are driven. Connected, the output shaft of the planetary gear reducer is disengaged from the working head, and the torque of the motor is transmitted to the working head through the central transmission shaft; when the power input end of the central transmission shaft is disengaged from the shaft gear, the shaft gear is The planetary gear of the planetary gear reducer meshes with the transmission, and the output of the planetary gear reducer is connected to the working head drive, and the torque of the motor is transmitted to the working head through the planetary gear reducer.

Further, there is still a ball between the central drive shaft and the output shaft of the reducer to prevent axial movement of the central drive shaft.

Further, the middle portion of the shaft gear is provided with internal teeth, and the power input end of the central transmission shaft is provided with external teeth that can be meshed with the internal teeth of the shaft gear; the working head is provided There is an external tooth, and the output shaft of the reducer is provided with internal teeth that can be meshed with the external teeth on the working head.

Further, the motor and the working head are connected by a sliding bracket, and the planetary gear reducer is slidably mounted on the guiding bracket.

Further, the housing is provided with a push-pull switch that connects the planetary gear reducer and a forward and reverse switch that controls the direction of rotation of the working head, and the push-pull switch has an electric grinder switch position at which the working head rotates at a high speed and The screwdriver switch position of the working head rotates at a low speed, and the push-pull switch is further provided with a lock block, and the lock block locks the forward/reverse switch when the push-pull switch is in the electric grinder switch position, so that the reverse switch cannot be reversed. When the push-pull switch is in the screwdriver switch position, the forward/reverse switch is unlocked so that it can be reversed and reversed.

Further, the housing includes a front housing and a rear housing, the front housing is rotatably coupled to the rear housing, and the motor, the planetary gear reducer and the working head are mounted in the front housing. The rear housing is provided with an AC/DC power source for supplying electric power to the motor.

3. Beneficial effects

Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

(1) A multi-functional electric tool of the present invention, wherein the planetary gear reducer can be slidably switched between the motor and the working head along the axial direction thereof, when the power input end of the central transmission shaft is connected with the shaft gear transmission, The planetary gear with the shaft gear and the planetary gear reducer is disengaged, and the power output end of the central transmission shaft is connected with the working head. The output shaft of the planetary gear reducer is disengaged from the working head, and the torque of the motor is transmitted through the center. The shaft is transmitted to the working head to realize high speed output, and can be used as electric grinder, electric drill, etc.; when the power input end of the central transmission shaft is disengaged from the shaft gear, the shaft gear is meshed with the planetary gear of the planetary gear reducer, The output shaft of the planetary gear reducer is connected with the working head drive, and the torque of the motor is transmitted to the working head through the planetary gear reducer to realize low-speed and high-torque output, which can be used as a screwdriver or the like; the multifunctional electric tool passes Sliding planetary gear reducer realizes the speed switching of the intermediate transmission mechanism, from And a power tool has two working speeds at the same time, realizes multi-function of the power tool, has simple structure and convenient operation;

(2) A multifunctional electric tool of the present invention, between the central drive shaft and the output shaft of the reducer, there is still a ball for preventing the axial movement of the central drive shaft, and the ball is used to realize the limit of the central drive shaft, and not only the machining It is easy to manufacture and easy to assemble, and the friction of the ball on the central drive shaft is small, the operation is more stable, and the transmission loss is small;

(3) A multifunctional electric tool of the present invention, wherein a central portion of the shaft gear is provided with internal teeth, and a power input end of the central transmission shaft is provided with external teeth that can be meshed with the internal teeth of the shaft gear; The external gear is arranged on the output head of the reducer, and the internal tooth can be meshed with the external teeth on the working head; the structure is convenient to switch, the transmission is stable and reliable, the torque output is large, and the service life is long;

(4) A multifunctional electric tool of the present invention, wherein the motor and the working head are connected by a sliding bracket, the planetary gear reducer is slidably mounted on the guiding bracket, and the planetary gear reducer is smoothly switched. ,accurate;

(5) A multifunctional electric tool of the present invention, wherein the housing is provided with a push-pull switch connecting the planetary gear reducer and a forward and reverse switch for controlling the rotation direction of the working head, and the push-pull switch has a high-speed rotation of the working head. The electric grinder switch position and the screwdriver switch position of the working head rotating at a low speed, the push-pull switch is further provided with a lock block, and the lock block locks the forward/reverse switch when the push-pull switch is in the grind switch position, so that the reverse switch cannot be reversed. When the push-pull switch is in the screwdriver switch position, the forward/reverse switch is unlocked so that it can be reversed and reversed; when used as a screwdriver, it has the function of the elastic screw for forward and reverse switching, and is used as an electric grinder or When the electric drill is used, the push-pull switch can lock the forward/reverse switch so that it cannot be reversed, and it cannot be switched to the high-speed output such as electric grinder when it is reversed as a screwdriver, which solves the operator's misoperation. Accidents occur to ensure safe use;

(6) A multifunctional electric tool of the present invention, the housing of which includes a front housing and a rear housing, the front housing and the rear housing are rotatably connected, and the motor, the planetary gear reducer and the working head are mounted in the front housing The rear housing is provided with an AC/DC power supply for supplying electric power to the motor, and the housing is divided into two parts that can be rotated, and can be adjusted and used according to needs during use, thereby improving the comfort and practicability of the power tool, and being easier to operate. .

DRAWINGS

1 is a schematic structural view of a multifunctional power tool of the present invention;

2 is a schematic view showing a low-speed output transmission structure of a multifunctional electric tool according to the present invention;

3 is a schematic diagram of a high-speed output transmission structure of a multifunctional electric tool according to the present invention;

4 is a schematic view showing the position of a push-pull switch and a forward-reverse switch when the multi-function power tool is at a low speed output according to the present invention;

FIG. 5 is a schematic view showing the position of the push-pull switch and the forward/reverse switch when the multi-function power tool is in high-speed output according to the present invention.

The label description in the schematic diagram:

1, front housing; 2, rear housing; 3, motor; 31, shaft gear; 4, planetary gear reducer; 41, planetary gear; 42, reducer output head; 43, central drive shaft; 44, ball 5, work head; 6, guide slide bracket; 7, push-pull switch; 71, lock block; 8, positive and negative switch; 9, AC / DC power.

detailed description

In order to further understand the contents of the present invention, the present invention will be described in detail with reference to the accompanying drawings and embodiments.

Example

1 , 2 and 3, a multifunctional power tool of the present embodiment includes a housing, a motor 3, a planetary gear reducer 4 and a working head 5, a motor 3, a planetary gear reducer 4, and a working The head 5 is sequentially mounted in the housing, and the rotation of the motor 3 is transmitted to the working head 5 through the planetary gear reducer 4, and the corresponding tool is mounted on the working head 5 to realize the corresponding function. Different from the prior art, the planetary gear reducer 4 of the present embodiment has a sliding switching function, and the output rotational speed of the working head 5 can be changed by sliding the planetary gear reducer 4, thereby realizing the multi-function of the electric power tool. Specifically, referring to FIG. 2 and FIG. 3, a shaft gear 31 is fixedly coupled to the motor shaft of the motor 3, and one end of the shaft gear 31 is connected to the motor shaft of the motor 3, and the other end is used as the planetary gear reducer 4. The sun gear of the power input, the planetary gear reducer 4 is provided with a central drive shaft 43 whose axis coincides with the central axis of the planetary gear reducer 4, and the power input end of the central drive shaft 43 is provided with a shaft shaft The gear 31 is connected to the drive shaft. The power output end of the central drive shaft 43 is provided with a transmission connection with the working head 5. The reducer output head 42 of the planetary gear reducer 4 is also provided with a structure for driving connection with the working head 5. The transmission principle of the above-described planetary gear reducer 4 is the same as that of the prior art, and will not be described herein.

The planetary gear reducer 4 in this embodiment is slidably switched between the motor 3 and the working head 5 in the axial direction of the planetary gear reducer 4, so that the power of the motor 3 can be directly transmitted to the working head 5 through the central transmission shaft 43, also It can be decelerated by the planetary gear reducer 4 and transmitted to the working head 5; specifically, as shown in FIG. 3, when the power input end of the center transmission shaft 43 is drivingly coupled with the shaft gear 31, the shaft gear 31 and the planetary gear are decelerated. The planetary gear 41 of the device 4 is disengaged, and the power output end of the central transmission shaft 43 is drivingly coupled to the working head 5, and the speed reducer output head 42 of the planetary gear reducer 4 is disengaged from the working head 5, and the torque of the motor 3 is passed through the center. The transmission shaft 43 is transmitted to the working head 5 to realize high-speed output, and can be used as an electric grinder, an electric drill, etc.; as shown in FIG. 2, when the power input end of the center transmission shaft 43 is disengaged from the shaft gear 31, the shaft gear 31 is meshed with the planetary gear 41 of the planetary gear reducer 4, and the reducer output 42 of the planetary gear reducer 4 is drivingly coupled to the working head 5, and the torque of the motor 3 is transmitted to the working head 5 through the planetary gear reducer 4, Achieve low speed and large Output torque, can be used as a screwdriver and the like. The multi-function electric tool of the embodiment realizes the rotation speed switching of the intermediate transmission mechanism by sliding the planetary gear reducer 4, so that one electric power tool has two working rotation speeds at the same time, thereby realizing multifunctionalization of the electric power tool; The central drive shaft 43 is disposed in the reducer 4, and realizes the rotational speed and torque requirements required for various functions, and has a simple structure and convenient operation.

As shown in FIG. 2 and FIG. 3, the central drive shaft 43 and the reducer output head 42 in this embodiment are still prevented. The ball 44 of the central drive shaft 43 is axially swayed. Specifically, a ball groove can be opened at a corresponding position of the center drive shaft 43, and one or more ball holes are opened in the output shaft 42 of the reducer, and the ball 44 is installed at the center through the ball hole. Between the transmission shaft 43 and the reducer output head 42; the use of the ball 44 to achieve the limit of the central drive shaft 43 is not only convenient for manufacturing and easy to assemble, but also the friction of the ball 44 to the central transmission shaft 43 is small, and the operation is more stable. The transmission loss is small. In addition, in the embodiment, the middle portion of the shaft gear 31 is provided with internal teeth, and the power input end of the central transmission shaft 43 is provided with external teeth that can be meshed with the internal teeth of the shaft gear 31; The external gear, the output shaft 42 of the reducer is provided with internal teeth that can be meshed with the external teeth on the working head 5; other transmission structures can be adopted between the power output end of the central transmission shaft 43 and the working head 5, and on the planet During the switching process of the gear reducer 4, the power output end of the central transmission shaft 43 and the working head 5 can always maintain the transmission connection; with this structure, the switching is convenient, the transmission is stable and reliable, the torque output is large, and the service life is long.

Returning to FIG. 1 , in order to make the planetary gear reducer 4 switch more smoothly and accurately, the motor 3 and the working head 5 in this embodiment are connected by a guide bracket 6 , and the planetary gear reducer 4 is slidably mounted. On the guide bracket 6, the planetary gear reducer 4 slides more smoothly on the guide bracket 6, and the switching is stable and reliable.

1 and in conjunction with FIG. 4 and FIG. 5, for ease of operation, a push-pull switch 7 for connecting the planetary gear reducer 4 and a forward/reverse switch 8 for controlling the rotational direction of the working head 5 are provided on the housing, and the push-pull is performed. The switch 7 has an electric grinder switch position of the working head 5 rotating at a high speed and a screwdriver switch position of the working head 5 rotating at a low speed. The toggle switch 7 can be controlled to slide the front and rear sliding switches of the planetary gear reducer 4, and the push-pull switch 7 is located. When the electric switch position is set, the working head 5 rotates at a high speed, and can be used as an electric grinder or an electric drill. When the push-pull change switch 7 is located at the screwdriver switch position, the working head 5 rotates at a low speed and a large torque, and can be used as a screwdriver. Of course, a power switch (not shown) is also provided on the housing for starting the power tool. Since the working head 5 is not allowed to be reversed when used as an electric grinder, and the working head 5 needs to be reversed to loosen the screw when used as a screwdriver, for the sake of safety, in the present embodiment, the push-pull changeover switch 7 is used. There is also a lock block 71. The lock block 71 locks the forward/reverse switch 8 when the push-pull change switch 7 is in the electric grind switch position, so that the push-pull change switch 7 is in the screwdriver switch position. The forward/reverse switch 8 is unlocked so that it can be reversed and reversed; specifically, the forward/reverse switch 8 is disposed at the rear of the push-pull change switch 7, and the toggle direction of the forward/reverse switch 8 and the push-pull of the push-pull changeover switch 7 The direction is vertical, the lock block 71 is disposed at the rear of the push-pull switch 7. When the push-pull switch 7 is located at the screwdriver switch position, the lock block 71 gives the toggle position of the forward/reverse switch 8, and the forward/reverse switch 8 can perform forward and reverse switching (as shown in FIG. 4), and when the push-pull changeover switch 7 is located in the electric grinder switch position, the lock block 71 is located just at the reverse rotation control position of the forward/reverse switch 8, so that the positive and negative reversal The switch 8 cannot be toggled, otherwise, when the forward/reverse switch 8 is located at the reverse rotation control position Push-pull switch 7 can not be switched to position electrical switch mill; the incident resolution of misoperation occurs due to ensure safety in use.

As shown in FIG. 1, a multifunctional power tool of the present embodiment is a power tool powered by an AC/DC power source 9. In order to improve the comfort and practicability of the power tool, the housing comprises a front housing 1 and a rear housing 2, the front housing 1 and the rear housing 2 are rotatably connected, and the motor 3, the planetary gear reducer 4 and the working head 5 are mounted. In the front housing 1, the AC/DC power supply 9A It is installed in the rear casing 2 for supplying electric power to the motor 3. The casing is divided into two parts which can be rotated, and can be adjusted and used according to needs during use, which is more comfortable and practical, and is easier to operate.

The utility model relates to a multifunctional electric tool, which is provided with a central drive shaft which can work independently in a planetary gear reducer, and realizes the rotation speed switching of the intermediate transmission mechanism by sliding the planetary gear reducer, so that one electric power tool has two at the same time The working speed can realize the multi-functionality of the electric tool, so that it can be used as a screwdriver at low speed, can be used as electric grinder at high speed, and has a simple structure and convenient operation. At the same time, it is positive when used as a screwdriver. Reverse the function of the tightening screw, and when used as an electric grinder, the push-pull switch can lock the forward and reverse switch so that it cannot be reversed, thus ensuring the safety of use.

The present invention and its embodiments have been described above in detail, and the description is not limited thereto, and only one embodiment of the present invention is shown in the drawings, and the actual structure is not limited thereto. Therefore, if the person skilled in the art is inspired by the present invention, the structural modes and embodiments similar to the technical solution are not creatively designed without departing from the inventive concept. protected range.

Claims

A multifunctional power tool comprising a housing, a motor (3), a planetary gear reducer (4) and a working head (5), the motor (3), a planetary gear reducer (4) and a working head (5) And being mounted in the housing in sequence, characterized in that: a shaft gear (31) is fixedly connected to the motor shaft of the motor (3), and a central transmission shaft (43) is arranged in the planetary gear reducer (4). The planetary gear reducer (4) is slidably switched between the motor (3) and the working head (5) in the axial direction thereof, when the power input end of the central transmission shaft (43) is drivingly connected to the shaft gear (31) The shaft gear (31) is disengaged from the planetary gear (41) of the planetary gear reducer (4), and the power output end of the central transmission shaft (43) is drivingly connected with the working head (5), and the planetary gear reducer (4) The reducer output head (42) is disengaged from the working head (5), and the torque of the motor (3) is transmitted to the working head (5) through the central transmission shaft (43); when the power transmission of the central transmission shaft (43) When the end is disconnected from the shaft gear (31), the shaft gear (31) meshes with the planetary gear (41) of the planetary gear reducer (4), and the reducer output of the planetary gear reducer (4) (42) ) with the work head (5 The transmission connection transmits the torque of the motor (3) to the working head (5) through the planetary gear reducer (4).
A multifunctional power tool according to claim 1, wherein said central drive shaft (43) and said reducer output head (42) are further prevented from axially swaying of said central drive shaft (43). Balls (44).
A multi-functional power tool according to claim 2, characterized in that: the central portion of the shaft gear (31) is provided with internal teeth, and the power input end of the central transmission shaft (43) is provided with An external tooth that meshes with the internal gear of the shaft gear (31); the working head (5) is provided with external teeth, and the output shaft (42) of the reducer is provided with a working head (5) The upper external teeth mesh with the internal teeth of the transmission.
Multifunctional power tool according to claim 1 or 2 or 3, characterized in that the motor (3) and the working head (5) are connected by a sliding bracket (6), The planetary gear reducer (4) is slidably mounted on the guide bracket (6).
A multifunctional power tool according to claim 4, wherein said housing is provided with a push-pull switch (7) for connecting the planetary gear reducer (4) and a control head (5) for rotating direction a forward/reverse switch (8), the push-pull switch (7) has an electric grinder switch position at a high speed rotation of the working head (5) and a screwdriver switch position at a low speed rotation of the working head (5), the push-pull switch The switch (7) is further provided with a lock block (71), which locks the forward/reverse switch (8) when the push-pull changeover switch (7) is in the electric grinder switch position, so that the reverse block cannot be reversely toggled. When the push-pull switch (7) is in the screwdriver switch position, the forward/reverse switch (8) is unlocked so that it can be reversed and reversed.
A multifunctional power tool according to claim 5, wherein said housing comprises a front housing (1) and a rear housing (2), said front housing (1) and rear housing The body (2) is rotationally connected, and the motor (3), the planetary gear reducer (4) and the working head (5) are mounted in the front housing (1), and the rear housing (2) is provided An AC/DC power supply (9) that supplies electrical energy to the motor (3).