CN214549693U

CN214549693U - Electric grinder

Info

Publication number: CN214549693U
Application number: CN202120320196.8U
Authority: CN
Inventors: 潘琦; 刘谦; 郑建永; 郑立宁
Original assignee: Richie Nanjing Electronic Technology Co Ltd
Current assignee: Richie Nanjing Electronic Technology Co Ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-11-02
Anticipated expiration: 2031-02-04

Abstract

The utility model discloses an electric grinder, which comprises a shell, a motor shaft, a coupling and an output shaft; the clutch can move relative to the coupler; the front cover is abutted against the clutch; a coupler support is also included, the coupler support including a first coupler support, a second coupler support, and a second spring. The utility model provides a pair of electric grinder can effectively fix the output, prevents that the output shaft from following the commentaries on classics for more convenient and fast is dismantled to the bistrique, adopts flexonics to solve the noise simultaneously and beats, has improved user experience greatly.

Description

Electric grinder

Technical Field

The utility model relates to an electric grinder.

Background

The application scenes of the small electric grinder are more and more extensive, and the small electric grinder is particularly used for cleaning teeth, polishing, whitening and the like from industrial appliances to daily life.

Due to the different needs of the scene, we are required to change different working heads in time in order to achieve more effective cleaning. The grinding head is arranged on the grinding head seat and is in transmission connection with the output shaft in the existing electric grinder, when the grinding head is actually held for disassembly, the condition that the grinding head and the main shaft rotate together often occurs, so that the grinding head cannot be taken down, and great inconvenience is brought to disassembly work.

Disclosure of Invention

The utility model aims to provide a: to the problem that above-mentioned prior art exists, provide an electric grinder, can effectively fix the output, prevent that the output shaft from following the commentaries on classics for more convenient and fast is dismantled to the bistrique, adopts flexonics to solve the noise simultaneously and beats, has improved user experience greatly.

In order to achieve the above purpose, the utility model provides an electric grinder, which comprises a shell, a motor shaft, a coupler and an output shaft, wherein two ends of the coupler are respectively connected with the output shaft and the motor shaft in a matching way; the clutch is coaxially arranged with the coupler and can move relative to the coupler; the clutch comprises a clutch body and a front cover, wherein the front cover is coaxially arranged with the motor shaft and is abutted against the clutch body, the clutch body further comprises a coupler supporting piece, the coupler supporting piece comprises a first coupler supporting piece, a second coupler supporting piece and a second spring, the second coupler supporting piece is connected with the coupler in a matched mode, the first coupler supporting piece is matched with the motor shaft, and the second spring is located between the first coupler supporting piece and the second coupler supporting piece.

According to an aspect of the invention, the second coupling support piece is close to there is radial second boss on first coupling support piece's the outer circumference, first coupling support piece's inner wall be equipped with the first boss of second boss complex.

According to an aspect of the invention, the first protruding portion is located above the second protruding portion.

According to an aspect of the invention, the second spring is in a compressed state right the second coupling support piece produces a continuous thrust.

According to an aspect of the utility model, still include first spring, set up the clutch with between the casing.

According to an aspect of the invention, the first spring is in a compressed state.

According to the utility model discloses an aspect, be equipped with on the outer circumference of clutch along output shaft axial extension's first spacing groove, be equipped with along radial bellied locating piece in the clutch on the circumference in, be equipped with on the casing with first spacing groove complex bellying, be equipped with on the outer circumference of shaft coupling upper portion with locating piece complex second spacing groove.

According to the utility model discloses an aspect, the locating piece sets up just keep away from in the clutch the upper end of motor shaft.

According to the utility model discloses an aspect, the second spacing groove sets up just keep away from on shaft coupling upper portion the upper end of motor shaft.

According to the utility model discloses an aspect, the protecgulum moves the clutch is followed the displacement of output shaft motion is greater than the height of locating piece.

Compared with the prior art, the electric grinder provided by the application has the following beneficial effects:

1. after the working head is disassembled, the clutch can effectively fix the output shaft and prevent the output shaft from rotating along with the output shaft, so that the working head is more convenient and faster to disassemble;

2. the spring arranged between the clutch and the shell in a compressed state can help the clutch to quickly fall back to a position where the clutch is clamped with the coupler, so that the output shaft is locked;

3. the second limiting groove and the positioning block are arranged at the upper end far away from the motor, so that the clutch can be unlocked and locked by generating smaller displacement, the height size of the electric grinder is reduced, and the product becomes more compact;

4. the first coupler supporting piece and the second coupler supporting piece are connected through the second spring, the problem of noise and jumping is solved through flexible connection, and the comfort level of a user is improved.

The following detailed description of the embodiments of the present invention will be described in conjunction with the accompanying drawings.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a cross-sectional view of the whole structure of an embodiment of the present invention.

Fig. 2 is a partially enlarged cross-sectional view of the upper portion of the electric grinder according to an embodiment of the present invention when it is not installed.

Fig. 3 is a partially enlarged cross-sectional view of the lower portion of the electric grinder according to an embodiment of the present invention when it is not installed.

Fig. 4 is an enlarged schematic view of a clutch according to an embodiment of the present invention.

Wherein the reference numerals of figures 1 to 4 are as follows:

1. grinding heads; 2. a burr base; 3. a first bevel gear; 4. a second bevel gear; 5. an output shaft; 6. a first spring; 7. a clutch; 8. a front cover; 9. a motor; 10. a motor shaft; 11. a first coupling support; 12. a coupling; 13. a first limit groove; 14. positioning blocks; 15 a housing; 111. a second spring; 112. a second coupling support.

Detailed Description

In order to make the objects, advantages and features of the present invention more clear, an electric grinder according to the present invention will be described in detail with reference to fig. 1 to 4. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.

As used in this specification, the singular forms "a", "an" and "the" include plural referents, and the plural forms "a plurality" includes more than two referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally connected. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present application, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, back, up, down, left, right", "transverse, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these directional terms are not only and imply that the positions or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the interior and exterior of the outline of the components in this section.

As shown in fig. 1-4, the utility model provides an electric grinder, which has a detachable upper and lower part, wherein the upper part of the electric grinder is provided with a working head and the lower part of the electric grinder is provided with a motor 9. The upper working head comprises a housing 15 and a grinding head 1. The grinding head 1 is arranged on a grinding head seat 2 and is in transmission connection with an output shaft 5 through a first bevel gear 3 which is vertically arranged and a second bevel gear 4 which is horizontally arranged and matched with the grinding head seat 2. The output shaft 5 is provided with a coupling 12 matched with the output shaft at one end far away from the grinding head 1.

The clutch device further comprises a clutch 7, wherein a first limiting groove 13 extending along the axial direction of the output shaft is arranged on the outer circumference of the clutch 7, and a positioning block 14 protruding along the radial direction is arranged on the inner circumference of the clutch 7. The clutch 7 and the coupler 12 are coaxially arranged, a second limit groove matched with the positioning block 14 is arranged on the outer circumference of the coupler 12, and the second limit groove is matched with the positioning block 14, so that the relative rotation motion of the clutch 7 and the coupler 12 is limited, namely, the clutch 7 can relatively move relative to the coupler 12. The inside of the housing 15 is provided with a protruding portion which is matched with the first limiting groove 13, the protruding portion fixes the clutch 7 through the first limiting groove 13, and the clutch 7 is limited to rotate relative to the housing 15, so that the clutch 7 can only move along the output shaft 5 relative to the housing 15.

The motor 9 positioned at the lower part is provided with a motor shaft 10, and the coupling supporting piece is matched and connected with the motor shaft 10 and the coupling 12 and is used for transmitting the rotating motion of the motor 9 to the output shaft 5 matched with the coupling 12 so as to drive the grinding head 1 to work.

The coupling support comprises a first coupling support 11, a second coupling support 112 and a second spring 111, wherein the second coupling support 112 is in a fitting connection with the coupling 12 and the first coupling support 112 is in a fitting connection with the motor shaft 10.

The lower end of the second coupling support 112, i.e. the outer circumference close to the first coupling support 11, is provided with a radial second protrusion, and the upper end of the inner wall of the first coupling support 11 is provided with a first protrusion matching with the second protrusion. When the first coupling support 11 is assembled with the second coupling support 112, the first boss is located above the second boss, limiting further movement of the second coupling support 112 away from the first coupling support 11.

The second spring 111 is located between the first coupling support 11 and said second coupling support 112. The present embodiment preferably places the second spring 111 in a compressed state so that the second spring 111 exerts a continuous pushing force on the second coupling support in order to return to its normal state.

The electric grinder in this embodiment further includes a front cover 8, and the front cover 8 is disposed coaxially with the motor shaft 10. The upper end of the front cover 8 abuts against the clutch 7, when the working head is mounted on the lower part of the motor, the front cover 8 pushes the clutch 7 to move upwards along the output shaft 5, and the coupler 12 pushes the second coupler support 112 to move downwards to further compress the second spring. In the embodiment, the positioning block 14 is preferably disposed in the clutch and away from the upper end of the motor shaft 10, the second limit groove is disposed on the coupler 12 and away from the upper end of the motor shaft 10, and the displacement of the clutch 7 moving along the output shaft 5 is greater than the height of the positioning block 14. Therefore, when the front cover 8 pushes the clutch 7 to move upwards along the output shaft 5 until the positioning block 14 is disengaged from the second limit groove, the circumferential limit of the coupler 12 is cancelled, so that the motor 9 can drive the coupler 12 to rotate.

When the working head is detached from the lower part where the motor is located, the front cover 8 is separated from the clutch 7, namely, the pushing force applied to the clutch 7 is removed, at the moment, the clutch 7 falls back, the positioning block 14 on the clutch 7 is matched with the second limiting groove on the outer circumference of the coupler 12, the rotating motion of the coupler 12 is limited, namely, the output shaft 5 is locked, and the rotation of the output shaft 5 is limited. When the grinding head 1 is disassembled, the output shaft 5 cannot rotate along with the rotation of the grinding head 1, so that the working head is more convenient and faster to disassemble. Meanwhile, when the working head is detached from the lower portion where the motor is located, the coupling 12 is separated from the second coupling support 112, that is, the pushing force applied to the second coupling support 112 is removed, and at this time, the second coupling support 112 moves upward under the upward pushing force of the second spring 111 until being restricted and held by the first protrusion of the first coupling support 112.

This embodiment preferably employs a spring 6 between the clutch 7 and the housing 15, which spring 6 is in a compressed state to assist the clutch to quickly fall back into engagement with the coupling and thereby lock the output shaft.

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 the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Therefore, the utility model provides a pair of electric grinder can effectively fix the output, prevents that the output shaft from following the commentaries on classics for more convenient and fast is dismantled to the bistrique, adopts flexonics to solve the noise simultaneously and beats, has improved user experience greatly.

The disclosed embodiments are not limited to the embodiments shown herein. Any modification, equivalent replacement, improvement and the like made by the utility model shall belong to the protection scope of the utility model.

Claims

1. An electric grinder comprises a shell, a motor shaft, a coupler and an output shaft, wherein two ends of the coupler are respectively connected with the output shaft and the motor shaft in a matched manner; the clutch is coaxially arranged with the coupler and can move relative to the coupler; still include the protecgulum, the protecgulum with the coaxial setting of motor shaft, and support and lean on the clutch, its characterized in that: the motor shaft coupling structure is characterized by further comprising a coupling supporting piece, wherein the coupling supporting piece comprises a first coupling supporting piece, a second coupling supporting piece and a second spring, the second coupling supporting piece is connected with the coupling in a matched mode, the first coupling supporting piece is matched with the motor shaft, and the second spring is located between the first coupling supporting piece and the second coupling supporting piece.

2. An electric grinder as claimed in claim 1, characterised in that: the second coupling support piece is close to a radial second bulge part is arranged on the outer circumference of the first coupling support piece, and a first bulge part matched with the second bulge part is arranged on the inner wall of the first coupling support piece.

3. An electric grinder as claimed in claim 2, characterised in that: the first boss is located above the second boss.

4. An electric grinder as claimed in claim 3, characterised in that: the second spring is in a compressed state producing a continuous thrust against the second coupling support.

5. An electric grinder as claimed in claim 1, characterised in that: the clutch further comprises a first spring arranged between the clutch and the shell.

6. An electric grinder as claimed in claim 5, characterised in that: the first spring is in a compressed state.

7. An electric grinder as claimed in claim 1, characterised in that: the clutch is characterized in that a first limiting groove extending along the axial direction of the output shaft is arranged on the outer circumference of the clutch, a positioning block protruding along the radial direction is arranged on the inner circumference of the clutch, a protruding part matched with the first limiting groove is arranged on the shell, and a second limiting groove matched with the positioning block is arranged on the outer circumference of the upper portion of the coupler.

8. An electric grinder as claimed in claim 7, characterised in that: the locating piece sets up in the clutch and keep away from the upper end of motor shaft.

9. An electric grinder as claimed in claim 8, characterised in that: the second limiting groove is formed in the upper portion of the coupler and far away from the upper end of the motor shaft.

10. An electric grinder as claimed in claim 9, characterised in that: the front cover drives the clutch to move along the output shaft, and the displacement of the clutch is larger than the height of the positioning block.