CN217020250U - Portable electric tool - Google Patents

Abstract

The application discloses portable electric tool, main casing body and the handle of being connected with the main casing body, main casing internal configuration has the motor, the motor includes: the output of rotor subassembly is equipped with the braking part, the braking part includes: first part, elastomeric element and second part, first part is fixed in the output of rotor subassembly, one side of first part is equipped with the accommodation space, the second part includes: the elastic component is arranged in a space formed by the outer side of the protruding part and the side wall of the accommodating space in a surrounding mode. After the tool is electrified, the motor rotates rapidly, so that the torsion spring or the elastic sheet is thrown away; after the instrument outage, the motor loses drive power, because torsional spring or shell fragment and second part looks mutual friction to the motor stall that makes realizes self-actuating brake.

Description

Portable electric tool

Technical Field

The application relates to the technical field of tools, in particular to a portable electric tool with an automatic braking function.

Background

It is well known that electric tools, such as electric drills, angle grinders, circular saws, miter saws, etc., are widely used, and such tools are not equipped with a braking mechanism, so that after the power is cut off, the driving motor will take ten seconds to stop rotating, and such frequent starting and stopping will easily cause safety problems.

Accordingly, there is a need for improvements in existing portable power tools.

SUMMERY OF THE UTILITY MODEL

To overcome the above disadvantages, the present application aims at: a portable electric tool/electric tool with an automatic braking function is provided, which can stop rotating quickly after the tool is powered off by arranging a braking structure on a shaft of a motor, thereby realizing the automatic braking function.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a portable power tool, comprising:

a main shell and a handle connected with the main shell,

the main casing is provided with a motor inside, the motor includes: a rotor component, the output end of the rotor component is provided with a braking component,

the braking part includes: a first member, an elastic member, and a second member,

the first component is fixed at the output end of the rotor component, one side of the first component is provided with an accommodating space,

the second component includes: the elastic component is arranged in a space formed by the outer side of the protruding part and the side wall of the accommodating space in a surrounding mode. After the tool is electrified, the motor rotates rapidly, so that the torsion spring or the elastic sheet is thrown away; after the instrument outage, the motor loses drive power, because torsional spring or shell fragment and second part looks mutual friction to the motor stall that makes realizes self-actuating brake.

In a preferred embodiment, the first member comprises: the base, one side of base disposes the plural strengthening rib, the middle part of base disposes perforation and accommodation space, the perforation is connected with the accommodation space, the output of rotor subassembly passes perforation and accommodation space and protrusion in the second part.

In a preferred embodiment, the base is integrally formed with the ribs.

In a preferred embodiment, the brake member is sleeved on the output end of the rotor assembly.

In a preferred embodiment, the brake member is fitted to the output shaft of the electric motor.

In a preferred embodiment, the second component is secured within the main housing.

In a preferred embodiment, the elastic member is a torsion spring or a spring plate.

In a preferred embodiment, the torsion spring or the spring plate is arranged symmetrically along the output shaft.

In a preferred embodiment, the motor is an inner rotor type motor.

In a preferred embodiment, the motor is an outer rotor type motor.

Advantageous effects

The portable electric tool of this application embodiment is current relatively tool because there is not the braking structure like electric drill, angle mill, electric circular saw, oblique saw etc. instrument is after the outage, and the motor still needs tens seconds just stall, and the portable electric tool outage back of two this applications can improve the security performance of machine in the time of several seconds motor stall, the machine.

Drawings

The accompanying drawings are included to provide an understanding of the disclosed embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure. The shapes and sizes of the various elements in the drawings are not to be considered as true proportions, but rather are merely intended to illustrate the context of the application.

Fig. 1 is a perspective view of an electric drill according to an embodiment of the present application;

FIG. 2 is a schematic illustration of the internal structure of the drill of FIG. 1;

fig. 3 is a schematic structural diagram of a motor according to an embodiment of the present application;

fig. 4 is a schematic structural view of a braking member in a view of the motor according to the embodiment of the present application;

FIG. 5 is an axial cross-sectional view of FIG. 1;

fig. 6 is a partially enlarged view of a portion a in fig. 5.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present application. The conditions employed in the examples may be further adjusted as determined by the particular manufacturer, and the conditions not specified are typically those used in routine experimentation.

Unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" and "coupled" and the like are not restricted to physical or mechanical direct connections, but may be indirect connections. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly. The portable electric tool can be an electric drill, an angle grinder, an electric circular saw, an oblique saw and the like. The following description will be made schematically by taking an electric drill as an example.

The application discloses portable electric tool, it includes: main casing body and the handle of being connected with the main casing body, this main casing internal disposition has the motor, and this motor includes: the output of this rotor subassembly is equipped with the braking part, and this braking part includes: first part, elastic component and second part, this first part includes: a base part, wherein one side of the base part is provided with a plurality of reinforcing ribs, and the middle part of the base part is provided with a through hole, a base part and an accommodating space; the through hole is connected with the accommodating space, and the accommodating space is used for accommodating the elastic component. The second component includes: when the second component is connected with the first component in a matched mode, at least part of the protruding portion of the shaft sleeve is embedded into the accommodating space, the elastic component is placed in a space defined by the outer side of the protruding portion and the side wall of the accommodating space, and the second component is also called a brake block. The brake component is sleeved on an output shaft of the motor, and after a tool carrying the brake component is electrified, the motor rapidly rotates, so that the torsion spring or the elastic sheet is thrown away; after the instrument outage, the motor loses drive power, because torsional spring or shell fragment and second part looks mutual friction to the motor stall that makes realizes self-actuating brake.

The present application will now be described with reference to fig. 1-6, taking as an example a power drill.

The electric drill 100 includes a main housing 110 and a handle 120 connected to the main housing 110, the main housing 110 having an output end 111 at one side thereof,

the main housing 110 is provided with a motor 130 therein, and the motor 130 includes: a stator assembly 131, and a rotor assembly 132 disposed inside the stator assembly 131, wherein an output end 132a of the rotor assembly 132 is provided with a braking component 140, the output end 132a is connected to an output shaft 133,

the braking part 140 includes: a first member 141, an elastic member 143, and a second member 142,

the first member 141 includes: a base 141e, a plurality of ribs 141d are disposed on one side of the base 141e, a through hole 141a, a contact portion 141b and a receiving space 141c are disposed in the middle of the base 141e, the through hole 141a is connected with the receiving space 141c, and the receiving space 141c is used for placing the elastic component 143. In the present embodiment, the base portion 141e and the rib 141d are integrally designed (in other embodiments, they may be separately designed). The contact portion 141b is fitted over the output end of the rotor assembly 132.

The second member 142 includes: when the second member 142 is coupled to the first member 141, the sleeve 142a is at least partially inserted into the accommodating space 141c, and the elastic members 143 are disposed in a space defined by the outer side 142a of the sleeve 142a and the sidewall 141c1 of the accommodating space 141 c. When the tool is disposed, the second member 142 is fixed in the main housing 110. This second part is also called a brake block. Preferably, the base portion 141e is disc-shaped, and the accommodating space 141c is configured to be symmetrical along the axis of the output shaft.

The tool carrying the brake component is electrified, and the motor rapidly rotates the output end to rotate, so that the torsion spring or the elastic sheet is thrown away. After the tool is powered off, the motor loses driving force, and the torsion spring or the elastic sheet and the second part rub against each other, so that the motor stops rotating, and automatic braking is realized.

In one embodiment, the output end 132a is integral with the output shaft 133, which may be collectively referred to as the output end 132a or the output shaft 133. Preferably, the end 133a of the output shaft 133 is directly output or connected to a speed regulating member (not shown) to output through the speed regulating member.

In one embodiment, a first bearing 134 and a second bearing 144 are disposed on two sides of the rotor assembly 132.

The motor of the electric drill of the above-described embodiment is an inner rotor type motor, and in other embodiments, the motor is an outer rotor type motor.

The motor of the electric drill described above is provided with a braking member which, in other embodiments, is provided on the output shaft of the motor, again to effect automatic braking.

The above-mentioned embodiments are only for illustrating the technical idea and features of the present application, and the purpose of the present application is to enable one skilled in the art to understand the content of the present application and implement the present application, and not to limit the protection scope of the present application. All equivalent changes and modifications made according to the spirit of the present application are intended to be covered by the scope of the present application.

Claims (10)

1. A portable power tool, comprising:

a main shell body and a handle connected with the main shell body,

the main casing is provided with a motor inside, the motor includes: a rotor component, the output end of the rotor component is sleeved with a braking component,

the braking part includes: a first member, an elastic member, and a second member,

the first part is fixed at the output end of the rotor component, one side of the first part far away from the rotor component is provided with an accommodating space,

the second member includes: the bulge is at least partially embedded into the accommodating space, and the elastic component is placed in a space defined by the outer side of the bulge and the side wall of the accommodating space.

2. The portable power tool of claim 1,

the first component includes: the base, the one side of base near rotor subassembly is configured with the plural strengthening rib, the middle part of base is configured with the perforation, the perforation with the accommodation space intercommunication.

3. The portable power tool of claim 2, wherein the output end of the rotor assembly passes through the through hole and the receiving space and protrudes from the second member.

4. The portable power tool of claim 2,

the base and the reinforcing rib are integrally formed.

5. The portable power tool of claim 1,

the output end of the rotor assembly passes through the first part and the second part.

6. The portable power tool of claim 1,

the second member is secured within the main housing.

7. The portable power tool of claim 1,

the elastic part is a torsion spring or an elastic sheet.

8. The portable power tool of claim 7, wherein the torsion or spring plate is configured to be symmetrical along the output shaft.

9. The portable electric power tool as claimed in claim 1, wherein the motor is an inner rotor type motor.

10. The portable power tool as claimed in claim 1, wherein the motor is an outer rotor type motor.

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