CN215789650U - Electric tool - Google Patents

Abstract

The utility model discloses an electric tool, which comprises a shell, a driving mechanism and a control unit, wherein the driving mechanism is arranged in the shell, the control unit is used for controlling the driving mechanism, the driving mechanism is a linear reciprocating power machine, the linear reciprocating power machine comprises a stator component and a rotor component, the far end of the rotor component is connected with a lock, the far end of the lock is provided with a mounting hole, a locking mechanism used for mounting and fixing a working head is arranged in the mounting hole, the rotor component drives the lock to coaxially reciprocate, the far end of the shell is detachably provided with a working auxiliary part, the working auxiliary part covers the outer side of the lock and is provided with an opening corresponding to the mounting hole of the lock, and the working head selectively extends out of the opening. This scheme simple structure, the function is various, simultaneously through with actuating mechanism, heat dissipation mechanism and the coaxial setting of working head rigging subassembly, can guarantee the stability of the inside function of electric tool.

Description

Electric tool

Technical Field

The utility model relates to the field of electric tools, in particular to an electric tool.

Background

Present craftsman or engineer, often use the sand light to polish, the file, the saw, the shovel, it is broken, the hammer, blow, chisel wood tenon and so on instrument, often use hand tool as the owner, if need be several kinds with electric tool, also there is a multi-functional machine, drive the eccentric wheel through the rotating electrical machines and realize the beat and carry out the reciprocal instrument of class linear type, this kind of instrument needs dedicated cutter consumptive material etc. to the user, use cost is high, and be difficult to realize the reciprocating motion on the same straight line, this kind of electric tool structure is complicated simultaneously, machine cost is high relatively, and need the use of independent instrument, it is not convenient enough.

In addition, often can produce a large amount of dusts and saw-dust on the work piece in the actual operation process, electric tool on the market does not blow the dirt function mostly, need utilize other instruments to clear up the dust and the saw-dust of operation surface, can't accomplish comprehensively to blow dirt and dust absorption ability and guaranteed that work is clean and the work piece is clean.

SUMMERY OF THE UTILITY MODEL

The novel purpose is to solve the problems in the prior art and provide an electric tool.

The purpose of the utility model is realized by the following technical scheme:

the electric tool comprises a machine shell, a driving mechanism arranged in the machine shell and a control unit used for controlling the driving mechanism, wherein the driving mechanism is a linear reciprocating power machine, the linear reciprocating power machine comprises a stator assembly fixedly arranged in the machine shell and a rotor assembly arranged in the stator assembly in a reciprocating mode, the far end of the rotor assembly is connected with a lock, the far end of the lock is provided with a mounting hole, a locking mechanism used for mounting and fixing a working head is arranged in the mounting hole, the rotor assembly drives the lock to reciprocate coaxially, the far end of the machine shell is detachably provided with a working auxiliary piece, the working auxiliary piece covers the outer side of the lock and is provided with an opening corresponding to the mounting hole of the lock, and the working head selectively extends out of the opening.

Preferably, the work aid is detachably connected to the housing in an alternative form by means of a screw thread, or a snap, or a catch, or a screw lock.

Preferably, the work auxiliary member includes mounting and moving part, mounting detachably is connected with the distal end of casing, the moving part cover is equipped with the mounting and both can produce relative slip, the inside reset spring that is provided with of mounting and moving part, reset spring's both ends respectively the butt be in the stopper of mounting inner wall with on the tip of moving part.

Preferably, the work auxiliary member is a hollow air hood, and the work auxiliary member is provided with a vent hole.

Preferably, the distal end surface of the work aid is planar.

Preferably, at least one end of the mover assembly of the linear reciprocating power machine is provided with a mover rotation prevention part, the mover rotation prevention part is composed of at least one plane parallel to the moving direction of the mover and a rolling body, and the rolling body is in linear contact with the plane.

Preferably, a heat dissipation mechanism is arranged in the casing, the heat dissipation mechanism is located at the coaxial far end of the rotor assembly, the heat dissipation mechanism comprises a piston fixed with the rotor assembly, and a first cavity and a second cavity which are arranged corresponding to the front position and the rear position of the piston, an air port is arranged between the first cavity and the second cavity, and a buffer spring or a rubber piece used for buffering the movement of the piston is arranged at the front end and the rear end of the piston.

Preferably, the lock is connected with the piston through a lock connector, a plane extending along the axial direction is arranged outside the lock connector, and the plane is contacted with the rolling body to form the rotor rotation prevention part; or the lock is directly connected with the piston, at least part of the outside of the lock and the piston is a plane extending along the axis direction, and the plane is contacted with the rolling body to form the rotor rotation prevention part.

Preferably, the stator assembly comprises a stator and linear bearings positioned on two sides of the stator, the rotor assembly comprises a rotor and a rotor positioning support shaft which are fixedly sleeved with each other, the rotor positioning support shaft, the rotor and the stator are coaxial and are sequentially arranged from inside to outside, an insulating layer in the rotor is wrapped between the rotor and the rotor support shaft, bearing parts are arranged at two ends of the rotor, the bearing parts slide in the linear bearings, and an insulating layer on the end face of the rotor is arranged between the rotor and the bearing parts; or the rotor is isolated from the lockset by an insulator which is arranged between the magnetic conduction part of the stator and the lockset, and the insulator is used for isolating and insulating the section of the output shaft between the end part of the magnetic conduction part and the lockset.

Preferably, a power speed regulation switch is arranged on the machine shell, the power speed regulation switch is respectively electrically connected with the control unit and the driving mechanism, and the control unit comprises but is not limited to a position sensor, a speed sensor, a temperature sensor and a function converter for auxiliary control.

The technical scheme of the utility model has the following beneficial effects:

1. according to the scheme, the linear reciprocating power machine drives the lockset and drives the working head to reciprocate, so that compared with the traditional electric tool, the linear reciprocating type movement direction and movement process of the traditional electric tool are more stable and the stroke is adjustable by driving the eccentric wheel through the rotating motor to swing, and meanwhile, a transmission mechanism for changing the direction of the motor is saved, the structure is relatively simple, and the power loss is reduced;

2. according to the scheme, the driving mechanism, the heat dissipation mechanism and the working head assembly are coaxially arranged, so that the stability of the internal operation of the electric tool can be ensured;

3. the working auxiliary part is detachably arranged outside the lockset, and the working head does not expose the working auxiliary part as far as possible in an initial state, so that the use safety of a user is ensured, and the possibility of injury is reduced; the end face of the far end of the working auxiliary part is arranged to be a plane, so that the plane can be ensured to be reliably contacted with a working surface, and the working quality and efficiency are improved; under the condition that the auxiliary piece is provided with the moving piece and the spring, the working head can be ensured not to expose out of the auxiliary piece under the initial condition, so that better safety is achieved, meanwhile, after the auxiliary plane can be aligned with the corresponding position of a required working face, the auxiliary plane is pressed down to work (the working head determines the extending working depth along with the pressing stroke), accurate work can be achieved, and the effect is better for local crushing of a maker particularly when a woodwork chisel is used for chiseling a wood tenon;

4. when the work auxiliary member is the air cover, during the starter motor, drive the piston through the active cell and form the atmospheric pressure difference or utilize one of the air flue dual mode of setting in the work auxiliary member can both realize blowing two kinds of functions of dirt and dust absorption, increase electrical tool's practicality and convenience.

Drawings

FIG. 1: is a cross-sectional view of the electric tool in the initial state in embodiment 1 of the present invention;

FIG. 2: in embodiment 1 of the utility model, the cross-sectional view of the electric tool is shown when the working head is in an extended state;

FIG. 3: is a cross-sectional view of a power tool in embodiment 3 of the utility model;

FIG. 4: is a cross-sectional view of the electric tool in the state that the working head is extended in embodiment 4 of the present invention.

Detailed Description

Objects, advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments. The embodiments are merely exemplary for applying the technical solutions of the present invention, and any technical solution formed by replacing or converting the equivalent thereof falls within the scope of the present invention claimed.

In the description of the schemes, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the embodiment, the operator is used as a reference, and the direction close to the operator is a proximal end, and the direction away from the operator is a distal end.

The power tool of the present invention will be described with reference to the accompanying drawings:

as shown in fig. 1, the electric tool includes a housing 1, a driving mechanism disposed in the housing 1, and a control unit 2 for controlling the driving mechanism, the driving mechanism is a linear reciprocating power machine, the linear reciprocating power machine includes a stator assembly 7 fixedly disposed in the housing 1 and a mover assembly 8 reciprocally disposed in the stator assembly 7, a distal end of the mover assembly 8 is connected to a lock 3 (in this embodiment, the distal end is an end close to an operation surface, and the proximal end is an end far from the operation surface), the lock 3 is a connector between a working head 10 and the electric tool, the distal end of the lock 3 is provided with a mounting hole 31, a locking mechanism for mounting and fixing the working head 10 is disposed in the mounting hole 31, and the locking mechanism can be any structure capable of locking by matching with an end of the working head 10, such as a locking sleeve, a buckle, etc., the mover component 8 drives the lockset 3 to coaxially reciprocate, and the far end of the casing 1 is detachably provided with a working auxiliary component 4.

Specifically, the distal end surface of the work assistant member 4 is a plane, the plane is an assistant plane of the work assistant member 4, the assistant plane directly contacts a plane to be operated when operating, the assistant plane may be perpendicular to the moving direction of the working head 10, or may be a plane with a certain inclination angle, and the opening 44 is disposed on the assistant plane. Of course, the auxiliary plane of the work aid 4 may also be other than the distal end surface.

The structure of the work aid 4 can be distinguished according to different work requirements and implementations as follows:

example 1:

the work auxiliary member 4 includes a fixed member 41 and a movable member 42, the fixed member 41 is detachably connected to the distal end of the housing 1, the outer sleeve of the movable member 42 is provided with the fixed member 41 and the fixed member and the movable member can slide relatively, a return spring 43 is arranged inside the fixed member 41 and the movable member 42, and two ends of the return spring 43 respectively abut against the limiting block on the inner wall of the fixed member 41 and the end of the movable member 42.

The working auxiliary part 4 is detachably connected with the machine shell 1 in a selected locking mode through threads, buckles, hooks or screws and covers the outer side of the lock 3, an opening 44 corresponding to the position of the mounting hole 31 of the lock 3 is formed in an auxiliary plane of the working auxiliary part 4, the working head 10 selectively extends out of the opening 44, more specifically, in order to guarantee operation safety, the working head 10 does not expose the auxiliary part under the initial condition, when operation is needed, the auxiliary plane is aligned with the corresponding position of the needed working face and then is pressed down to work, and the working head 10 is matched with a return spring 43 arranged in the fixing part 41 and the moving part 42 along with the pressing stroke to determine the extending working depth and can work accurately.

Example 2:

the work auxiliary member 4 includes a fixed member 41 and a movable member 42, the fixed member 41 is detachably connected to the distal end of the housing 1, the fixed member 41 is sleeved inside the movable member 42, and the two members can slide relative to each other, and other structures are the same as those of embodiment 1.

Example 3:

the working auxiliary part 4 is a hollow air hood, the working auxiliary part 4 is detachably connected with the machine shell 1 in a mode of being locked by threads, buckles, hooks or screws, and is sealed by a rubber part, meanwhile, the working auxiliary part 4 covers the outer side of the lockset 3, an air vent 45 is further arranged on an auxiliary plane of the working auxiliary part 4, when the motor is started, the rotor drives the piston 6 to form air pressure difference, and if air flow is blown out from an air hole 45 of the air hood, a dust blowing function can be provided; if the air current inhales from the air hood, the dust absorption function can be provided.

Additionally, an air duct can be arranged in the air hood to change the direction of the air flow in the dust blowing direction, surrounding air is driven by high-speed high-pressure air to form siphonage, and dust is sucked to the 10 parts of the working head.

Example 4:

the working auxiliary part 4 is a single auxiliary part, and is detachably connected with the machine shell 1 in a selected form of locking through threads, buckles, hooks or screws and covers the outer side of the lock 3, an opening 44 corresponding to the position of the mounting hole 31 of the lock 3 is formed in an auxiliary plane of the working auxiliary part 4, the working auxiliary part 4 is not exposed out of the working head 10 as far as possible in an initial state, when operation is needed, the auxiliary plane is tightly attached to an operating surface, and the extending depth of the working head 10 is controlled through a switch 11 to regulate and control a gear.

Specifically referring to fig. 1-2, the stator assembly 7 includes a stator and linear bearings located at two sides of the stator, the rotor assembly 8 includes a rotor and a rotor positioning support shaft that are sleeved and fixed with each other, the rotor positioning support shaft, the rotor and the stator are coaxial and are sequentially arranged from inside to outside, an insulating layer in the rotor is wrapped between the rotor and the rotor support shaft, bearing portions are respectively arranged at two ends of the rotor, the bearing portions slide in the linear bearings, and an insulating layer at the end face of the rotor is arranged between the rotor and the bearing portions; or, an insulator is arranged between the rotor and the lock 3 relative to the stator magnetic conduction part, and the insulator is arranged between the end part of the magnetic conduction part and the lock 3 for insulating the section of the output shaft.

In the scheme, preferably, a lock 3 connector is arranged at the far end of the rotor assembly 8, the lock 3 connector is connected with the near end of the lock 3, and meanwhile, a plane in contact with the rolling body 9 is arranged on the lock 3 connector.

As shown in fig. 1-2, the stator assembly 7 includes a stator and linear bearings located at two sides of the stator, and one of the linear bearings may be combined with a front rolling element to form a support, or two of the linear bearings may be used to realize a main support, and the rolling element realizes an auxiliary support and an anti-rotation. Selected according to load and volume requirements. Meanwhile, the linear bearing can be a graphite copper sleeve, a shaft sleeve, a powder metallurgy shaft sleeve, a linear bearing with market standard specification and the like. In addition, the anti-rotation body is in surface contact, so that a linear bearing is saved, and the method also belongs to the field of the patent and belongs to special cases.

The casing 1 is internally provided with a heat dissipation mechanism, the heat dissipation mechanism is located at the coaxial far end of the rotor assembly 8 and comprises a piston 6 fixed with the rotor assembly 8 and a first cavity 61 and a second cavity 62 which are arranged corresponding to the front position and the rear position of the piston 6, an air port 63 is arranged between the first cavity 61 and the second cavity 62, the air port 63 can be an air inlet or an air outlet, in the scheme, the air port 63 is preferably an air inlet, buffer springs or rubber pieces used for buffering the movement of the piston 6 are arranged at the front end and the rear end of the piston 6, in the scheme, a front movement buffer spring and a rear movement buffer spring are respectively arranged at the front end and the rear end of the piston 6, and furthermore, an O-shaped ring with a sealing function is selectively arranged on the outer diameter of the piston 6.

Specifically, the lock 3 is connected with the piston 6 through a lock 3 connector, a plane extending along the axial direction is arranged outside the lock 3 connector, and the plane is contacted with the rolling body 9 to form the rotor rotation preventing part; or, the lock 3 is directly connected to the piston 6, at least a portion of the exterior of the lock 3 and the piston 6 is a plane extending along the axis direction, the plane contacts with the rolling element 9 to form the rotor rotation preventing portion, and in this embodiment, the rolling element 9 is preferably a rolling bearing.

Specifically, a power speed regulation switch 11 is arranged on the machine shell 1, the power speed regulation switch 11 is respectively electrically connected with the control unit 2 and the driving mechanism, and the control unit 2 includes, but is not limited to, a position sensor, a speed sensor, a temperature sensor and a function converter for performing auxiliary control. The control unit can also be selectively connected with an LED illuminating lamp, an indicating lamp, a sound alarm and other indicating/warning units.

Specifically, the working head 10 is one of functional electric tools such as a saw blade, a band saw blade chuck assembly, a shovel, a file, a chisel, a steel bar, a sanding assembly, and a massage head.

The utility model has various embodiments, and all technical solutions formed by adopting equivalent transformation or equivalent transformation are within the protection scope of the utility model.

Claims (10)

1. Electric tool, including the casing, set up in actuating mechanism in the casing and be used for controlling actuating mechanism's control unit, its characterized in that: the driving mechanism is a linear reciprocating power machine, the linear reciprocating power machine comprises a stator assembly fixedly arranged in the shell and a rotor assembly arranged in the stator assembly in a reciprocating motion mode, the far end of the rotor assembly is connected with a lock, the far end of the lock is provided with a mounting hole, a locking mechanism used for mounting and fixing a working head is arranged in the mounting hole, the rotor assembly drives the lock to perform coaxial reciprocating motion, the far end of the shell is detachably provided with a working auxiliary piece, the working auxiliary piece covers the outer side of the lock and is provided with an opening corresponding to the mounting hole of the lock, and the working head selectively extends out of the opening.

2. The power tool of claim 1, wherein: the working auxiliary part is detachably connected with the machine shell in an alternative mode of locking through threads, buckles, hooks or screws.

3. The power tool of claim 1, wherein: the work auxiliary member includes mounting and moving part, mounting detachably is connected with the distal end of casing, the moving part cover is equipped with the mounting and both can produce the relative slip, the inside reset spring that is provided with of mounting and moving part, reset spring's both ends butt respectively is in the stopper of mounting inner wall with on the tip of moving part.

4. The power tool of claim 1, wherein: the work auxiliary member is a hollow air cover, and a vent hole is formed in the work auxiliary member.

5. The power tool of claim 1, wherein: the distal end face of the work aid is a flat surface.

6. The electric power tool according to any one of claims 1 to 5, wherein: at least one end of a rotor component of the linear reciprocating power machine is provided with a rotor rotation prevention part, the rotor rotation prevention part is composed of at least one plane parallel to the motion direction of the rotor and a rolling body, and the rolling body is in linear contact with the plane.

7. The power tool of claim 6, wherein: the heat dissipation mechanism is arranged in the casing and located at the coaxial far end of the rotor assembly, the heat dissipation mechanism comprises a piston fixed with the rotor assembly, and a first cavity and a second cavity which are arranged corresponding to the front position and the rear position of the piston, an air port is arranged between the first cavity and the second cavity, and a buffer spring or a rubber piece used for buffering the movement of the piston is arranged at the front end and the rear end of the piston.

8. The power tool of claim 7, wherein: the lock is connected with the piston through a lock connecting piece, a plane extending along the axial direction is arranged outside the lock connecting piece, and the plane is contacted with the rolling body to form the rotor anti-rotation part; or the lock is directly connected with the piston, at least part of the outside of the lock and the piston is a plane extending along the axis direction, and the plane is contacted with the rolling body to form the rotor rotation prevention part.

9. The power tool of claim 1, wherein: the stator assembly comprises a stator and linear bearings positioned on two sides of the stator assembly, the rotor assembly comprises a rotor and a rotor positioning support shaft which are fixedly sleeved with each other, the rotor positioning support shaft, the rotor and the stator are coaxial and are sequentially arranged from inside to outside, an inner rotor insulating layer is wrapped between the rotor and the rotor support shaft, bearing parts are arranged at two ends of the rotor, the bearing parts slide in the linear bearings, and an end surface insulating layer of the rotor is arranged between the rotor and the bearing parts; or the rotor is isolated from the lockset by an insulator which is arranged between the magnetic conduction part of the stator and the lockset, and the insulator is used for isolating and insulating the section of the output shaft between the end part of the magnetic conduction part and the lockset.

10. The power tool of claim 1, wherein: the shell is provided with a power speed regulation switch which is respectively electrically connected with the control unit and the driving mechanism, and the control unit comprises but is not limited to a position sensor, a speed sensor, a temperature sensor and a function converter which are used for carrying out auxiliary control.

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