CN212518621U

CN212518621U - Filtration and electric tool

Info

Publication number: CN212518621U
Application number: CN202021256292.2U
Authority: CN
Inventors: 庄佳元; 周文译
Original assignee: Jiangsu Hyson Electronic Technology Co ltd
Current assignee: Jiangsu Hyson Electronic Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-09
Anticipated expiration: 2030-06-30

Abstract

The utility model relates to a filtration field specifically is a filtration, including the electro-magnet, the electro-magnet is disposed in the air inlet end of motor, and the outside gas is held by the air inlet and is got into then via the electro-magnet flow direction the motor. The utility model also provides an electric tool, including above-mentioned filtration and motor casing, place in the motor casing, housing detachably install in the motor casing. The technical problem that the motor in the prior art fails due to the fact that scrap iron enters the air cooling channel of the motor when the motor faces is solved.

Description

Filtration and electric tool

Technical Field

The utility model relates to a filter field specifically is a filtration and electric tool.

Background

At present, a motor in an electric tool is cooled by strong exhaust air, the heat generated by the motor is taken away by the air passing through the motor stator, the rotor and the stator and the shell, but impurities of a working place such as scrap iron, stone chips, dust and the like are often mixed in the air, and the rotor rotates at a high speed, so the impurities collide with the rotor and the stator to damage enameled wires, and the motor fails. In particular, for a permanent magnet brushless tool, iron filings are adsorbed on the surface of a permanent magnet of a stator/rotor and form a stacking layer, and the stacked iron filings and the stator/rotor generate friction, so that the motor fails and serious safety threat is caused to operators.

Disclosure of Invention

In order to solve the technical problem that the motor among the prior art can face the forced air cooling passageway that iron fillings got into the motor and cause the motor to become invalid, the utility model provides a filtration has solved above-mentioned technical problem.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a filtration, including the electro-magnet, the electro-magnet is disposed in the air inlet end of motor, and the outside gas is held by the air inlet and is got into then via the electro-magnet flow direction the motor.

The utility model discloses a filtration is provided with the electro-magnet at the air inlet end of motor, and the outside gas is held by the air inlet and gets into then via the electro-magnet flow direction motor, and the in-process electro-magnet of gas circulation can adsorb the iron fillings that take so that the gas that gets into the motor part does not contain iron fillings, has solved the technical problem that the motor among the prior art can face the forced air cooling passageway that iron fillings got into the motor and cause the motor to become invalid.

Further, still include: the casing has the accommodation space who holds the electro-magnet, place the housing of motor in the casing in and be located the air inlet end, airflow channel has between casing and the housing, the casing orientation the face of air inlet end forms the adsorption plane, at least a part of adsorption plane is made for soft magnet.

Further, the housing includes: the accommodating body is internally provided with the accommodating space, and a gap is formed between the accommodating body and the housing; and the outer periphery of the accommodating body extends outwards to form the outer flange, and a gap is also formed between the outer flange and the casing.

Further, the housing further comprises: the chip collecting structure is formed by the accommodating body towards one side of the air inlet end.

Further, the chip collecting structure is formed into a groove, and the groove is formed by extending the outer flange towards the air inlet end.

Furthermore, the chip collecting structure is also provided with a chip outlet channel, and the housing is provided with a chip outlet communicated with the chip outlet channel.

Furthermore, a plurality of air inlets are formed on the air inlet surface of the housing, and a gap is formed between the leeward surface of the housing and the ledge of the groove.

Furthermore, a bulge is further arranged on the lee side of the housing and abuts against the upper end face of the chip outlet channel to isolate the chip outlet channel from the airflow channel.

Furthermore, the power supply of the electromagnet and the motor is controlled by the same power switch.

The utility model also provides an electric tool, include: the above-described filter structure; the motor casing is arranged in the motor, and the housing is detachably arranged on the motor casing.

Based on the structure, the utility model discloses the technological effect that can realize does:

1. the utility model discloses a filtering structure, the air inlet end at the motor is provided with the electro-magnet, and outside gas enters from the air inlet end and then flows to the motor via the electro-magnet, and the electro-magnet can adsorb the iron fillings that bring in the gas so that the gas that enters into the motor part does not contain iron fillings in the process of gas circulation, has solved the motor among the prior art and can face the air-cooled passageway that iron fillings enter the motor and cause the technical problem that the motor became invalid;

2. the utility model discloses a filtration arranges the electro-magnet in the casing, places the housing of motor in the casing and is located the air inlet end, has airflow channel between casing and the housing, and the casing is made by soft magnet towards the face of air inlet end, and this shape of face becomes the adsorption plane and is used for adsorbing iron fillings, can obtain the buffering in adsorption plane department when outside gas gets into the motor, and the gas flow rate slows down so as to do benefit to the absorption of electro-magnet to iron fillings to the adsorption effect of iron fillings has been improved. Meanwhile, the adsorption surface is a smooth plane, and compared with the electromagnet which is directly exposed, the electromagnet is more beneficial to cleaning iron chips in the later period, and the convenience in cleaning the iron chips is improved;

3. the utility model discloses a filtering structure, one side that holds the body and face the air inlet end is formed with grooved collection bits structure, and collection bits structure is used for collecting the adsorbed iron fillings, and when air inlet end wind-force is too big or electromagnet magnetic force undersize and make iron fillings move on the iron fillings adsorption surface, grooved collection bits structure's ledge can block iron fillings so that prevent it from getting into the motor part, and the ledge also can prevent that some other impurity of bigger granule from getting into the motor part simultaneously, thereby has improved the filter effect;

4. the utility model discloses a filtration, collection bits structure still are equipped with the play bits passageway, set up on the housing with the play bits mouth of play bits passageway intercommunication by absorbent iron fillings in order to discharge. When the electric tool works, the electromagnet synchronously starts to work; after the work is finished, the power supply is turned off, and the electromagnet is synchronously powered off. When the scrap iron removing device is used specifically, as long as the holding posture of the electric tool is adjusted, the scrap iron outlet faces the ground, the power supply of the electric tool is cut off, the electromagnet loses the adsorption force on the scrap iron, the scrap iron slides along the scrap iron outlet channel and is separated from the scrap iron outlet, and the convenience in scrap iron removing is further improved.

5. The utility model discloses a filtration still is equipped with the arch on the lee side of housing, and the arch can push up the up end that leans on the sweeps passageway so that sweeps passageway and above-mentioned airflow channel mutual isolation iron fillings flow in the motor from airflow channel when preventing to clear up. Specifically, the positions of the bulges on the leeward side of the housing are opposite to the positions of the ledges on the two sides of the scrap outlet channel, and after the bulges abut against the ledges, the airflow channel between the ledge on the side surface of the scrap outlet channel and the leeward side of the housing can be completely closed, so that the scrap outlet channel and the airflow channel are isolated from each other, thereby preventing the scrap iron from flowing into the motor from the airflow channel during cleaning and reducing the risk of the scrap iron flowing into the motor during cleaning.

Drawings

Fig. 1 is a schematic view of the overall structure of the electric power tool of the present invention;

fig. 2 is a partial exploded view of the power tool of the present invention;

fig. 3 is a partial exploded view from another perspective of the power tool of the present invention;

FIG. 4 is a schematic view of a housing of the power tool of the present invention;

FIG. 5 is a schematic view of a housing of the power tool of the present invention;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

fig. 7 is a schematic view of a motor case of the electric power tool of the present invention.

Wherein: 1-an electromagnet; 2, a motor; 3-shell, 31-adsorption surface, 32-containing body, 33-outer flange, 34-ledge, 35-scrap outlet channel; 4-cover shell, 41-chip outlet, 42-air inlet, 43-bulge; 5-motor casing; 6-airflow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-7, the utility model provides a filtering structure, including electro-magnet 1, electro-magnet 1 is disposed in the air inlet end of motor 2, and the outside gas is held by the air inlet and is got into then to flow to motor 2 via electro-magnet 1. The electromagnet 1 can adsorb iron chips carried in the gas to protect the motor 2 in the gas circulation process.

Further, the utility model discloses a filtration still includes casing 3, and casing 3 has the accommodation space who holds electro-magnet 1, places motor 2's housing 4 in casing 3 and is located the air inlet end, has airflow channel 6 between casing 3 and the housing 4, and casing 3 is towards the face of air inlet end and is formed adsorption plane 31, and adsorption plane 31 at least partly is made for soft magnet. Further, seted up a plurality of air inlets 42 on the air inlet face of housing 4 in order to form the air inlet end, can obtain the buffering in adsorption plane 31 department when outside gas gets into motor 2, the gas flow rate slows down in order to do benefit to the absorption of electro-magnet 1 to iron fillings to the adsorption effect of iron fillings has been improved. Meanwhile, the adsorption surface 31 is a smooth plane, and is more beneficial to cleaning later-stage scrap iron compared with the electromagnet 1 which is directly exposed.

Further, the housing 3 includes a containing body 32 and an outer flange 33, the containing body 32 forms a containing space inside, and a gap is provided between the containing body 32 and the casing 4 for external air to flow into the motor 2; an outer flange 33 is formed by extending the outer circumference of the receiving body 32 outward, and there is also a gap between the outer flange 33 and the housing case 4 for the external air to flow into the motor 2.

In order to temporarily collect the adsorbed iron pieces, the housing 3 further includes a chip collecting structure formed on a side of the accommodating body 32 toward the air intake end.

Further, the chip-collecting structure is formed as a recess formed by the outer flange 33 extending towards the air intake end. A gap is formed between the ledge 34 of the groove and the leeward surface of the housing 4 for the inflow of external air into the motor 2. When the too big or 1 magnetic force undersize of electro-magnet of air inlet end wind-force makes iron fillings remove on iron fillings adsorption surface 31, the ledge 34 of recess can block iron fillings in order to prevent that iron fillings from getting into motor 2 part, and ledge 34 also can prevent that other impurity of the great granule of part from getting into motor 2 part simultaneously to the filter effect has been improved.

Furthermore, the chip collecting structure is further provided with a chip outlet channel 35, and the chip outlet channel 35 is communicated to a chip outlet 41 on the housing 4. When the scrap iron cleaning device is used, as long as the holding posture is adjusted, the scrap iron outlet 41 faces the ground, the power supply is switched off, the electromagnet 1 loses the adsorption force on scrap iron, the scrap iron slides down along the scrap iron outlet channel 35 and is separated from the scrap iron outlet 41, and the convenience in scrap iron cleaning is improved.

Further, the upper end surface of the chip channel 35 may abut against a protrusion 43 on the housing 4 to isolate the chip channel 35 and the above-mentioned air flow channel 6 from each other. Specifically, the protrusion 43 is disposed on the leeward side of the housing 4 and opposite to the ledge 34 on both sides of the chip outlet channel 35, and when the protrusion 43 abuts against the ledge 34, the airflow channel 6 between the ledge 34 on the side of the chip outlet channel 35 and the leeward side of the housing 4 can be completely closed, so as to isolate the chip outlet channel 35 and the airflow channel 6 from each other, thereby preventing iron chips from flowing into the motor 2 from the airflow channel 6 during cleaning.

It should be noted that the utility model discloses a filtration's 1 and motor 2's power supply is controlled so that electro-magnet 1 and motor 2 are got the electricity simultaneously and are lost the electricity by same switch to convenience when having improved the field usage.

The utility model also provides an electric tool, including foretell filtration and motor casing 5, motor casing 5 embeds above-mentioned motor 2, and housing 4 is installed to detachably on the motor casing 5 simultaneously. Specifically, motor casing 5 and housing 4 are the spiro union for the optional, and filtration is spacing to be fixed between motor casing 5 and housing 4 through dodging the groove.

It should be understood that the above description of the specific embodiments is only for the purpose of explanation and not for the purpose of limitation. Obvious changes or variations caused by the spirit of the present invention are within the scope of the present invention.

Claims

1. A filtering structure is characterized by comprising an electromagnet (1), wherein the electromagnet (1) is arranged at an air inlet end of a motor (2), and external air enters from the air inlet end and then flows to the motor (2) through the electromagnet (1).

2. The filtration structure of claim 1, further comprising:

casing (3), have and hold the accommodation space of electro-magnet (1), place in housing (4) of motor (2) in casing (3) and be located the air inlet end, airflow channel (6) have between casing (3) and housing (4), casing (3) orientation the face of air inlet end forms adsorption plane (31), adsorption plane (31) at least partly is soft magnet and makes.

3. The filtering structure according to claim 2, characterized in that said casing (3) comprises:

a housing body (32), the housing body (32) forming the housing space therein, the housing body (32) and the casing (4) having a gap therebetween;

an outer flange (33), wherein the outer periphery of the containing body (32) extends outwards to form the outer flange (33), and a gap is also arranged between the outer flange (33) and the casing (4).

4. A filter structure according to claim 3, wherein the housing (3) further comprises:

the chip collecting structure is formed by one side, facing the air inlet end, of the accommodating body (32).

5. A filter structure according to claim 4, wherein the chip-collecting structure is formed as a recess, which is formed by the outer flange (33) extending towards the air intake end.

6. A filter structure according to claim 5, wherein the chip collecting structure is further provided with a chip outlet channel (35), and the housing (4) is provided with a chip outlet (41) communicated with the chip outlet channel (35).

7. A filter structure as claimed in claim 6, characterised in that the air inlet face of the casing (4) is formed with a plurality of air inlets (42), there being a gap between the leeward face of the casing (4) and the ledge (34) of the recess.

8. A filter structure according to claim 7, characterised in that the lee-side surface of the casing (4) is further provided with a projection (43), which projection (43) abuts against the upper end surface of the chip channel (35) in order to isolate the chip channel (35) and the air flow channel (6) from each other.

9. A filter structure as claimed in claim 1, characterised in that the power supply of the electromagnet (1) and the motor (2) is controlled by the same power switch.

10. An electric power tool, characterized by comprising:

a filter structure according to any one of claims 2-8;

the motor casing (5), place in motor (2) motor casing (5), housing (4) detachably install in motor casing (5).