CN217255312U

CN217255312U - Angle grinder

Info

Publication number: CN217255312U
Application number: CN202123381549.4U
Authority: CN
Inventors: 杨思豪; 刘爱国
Original assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Current assignee: Jiangsu Dongcheng Tools Technology Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2022-08-23
Anticipated expiration: 2031-12-29

Abstract

The utility model relates to an angle grinder, which comprises a shield component for partially accommodating a working head, wherein the shield component comprises a first shield suitable for being connected with a shell and a second shield arranged outside the first shield, and the first shield and the second shield form a closed shield structure; the second protective cover is provided with a first side wall and a second side wall which are arranged on two axial sides of the working head, an accommodating space is formed between the first side wall and the second side wall, the first protective cover is positioned in the accommodating space, an elastic piece is arranged in the second protective cover, and the elastic piece is abutted between the inner walls of the first protective cover and the second protective cover so as to provide pretightening force for the first protective cover. Through set up the elastic component between first guard shield and second guard shield in order to compensate the clearance between the guard shield and provide the pretightning force to first guard shield, avoid because of the wearing and tearing that the fit-up clearance caused, reduce vibrations and the noise that leads to because of the machine operation between the guard shield in the use simultaneously. The utility model discloses can to a certain extent lead to joining in marriage current guard shield in the market, wide and long service life of application.

Description

Angle grinder

[ technical field ]

The utility model relates to an electric tool field, in particular to an angle mill that is used for carrying out operations processing such as grinding, cutting, rust cleaning, polishing to the work piece.

[ background Art ]

The working principle of the angle grinder is that a grinding wheel or a grinding disc which is driven by a motor and rotates at a high speed is driven by the motor to carry out processing such as multi-angle grinding, cutting, derusting, polishing and the like on a workpiece, and the angle grinder is mainly used for decoration and building occasions.

According to the requirement of safety regulations, the angle grinder must use a protective cover when in use, but the corresponding protective cover structures in the cutting occasion and the grinding occasion are different. The cutting occasion needs to use the closed type protective cover which provides protection on both sides of the working head, and the grinding occasion only needs to use the semi-closed protective cover which provides protection on one side of the working head. Therefore, the shield assembly provided in the prior art can replace the shields for two kinds of use requirements, the shield assembly includes two sets of shields, but the two sets of shields have the defects of overlarge gap and large vibration and noise caused by continuous operation of the machine during assembly, and the replacement operation is relatively complicated.

In view of the above, there is a need for an improved angle grinder that overcomes the shortcomings of the prior art.

[ contents of utility model ]

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. To this end, an object of the present invention is to provide an angle grinder that reduces vibration and noise of a shield assembly.

The utility model provides a technical scheme that prior art problem adopted is: an angle grinder, comprising: the protective cover assembly comprises a first protective cover suitable for being connected with the machine shell and a second protective cover covering the outer side of the first protective cover, and the first protective cover and the second protective cover form a closed protective cover structure; the second protective cover is provided with a first side wall and a second side wall which are arranged on two axial sides of the working head, an accommodating space is formed between the first side wall and the second side wall, the first protective cover is located in the accommodating space, an elastic piece is arranged in the second protective cover, and the elastic piece abuts against the space between the first protective cover and the inner wall of the second protective cover so as to provide pretightening force for the first protective cover.

The further improvement scheme is as follows: an elastic sheet connected to the second side wall is arranged in the second protective cover and abuts against the first protective cover so as to provide axial pretightening force for the first protective cover.

The further improvement scheme is as follows: the shell fragment has installation section and butt section that all is U type structure, be equipped with the draw-in groove in the accommodation space, the installation section peg graft in the draw-in groove, butt section butt in first guard shield.

The further improvement scheme is as follows: the second protective cover further comprises a top wall connected between the first side wall and the second side wall, and at least one elastic element is arranged on the inner side of the top wall to provide radial pre-tightening force for the first protective cover.

The further improvement scheme is as follows: the second shield is provided with at least two stopping portions located on the end side of the first side wall, and the first shield is located between the at least two stopping portions to limit circumferential rotation of the first shield.

The further improvement scheme is as follows: the stopping part is a protrusion which extends from the end side of the first side wall in the radial direction and is formed by bending towards the direction of the second side wall.

The further improvement scheme is as follows: the inner wall of the second shield is provided with a plurality of ribs, and the plurality of ribs protrude from the second side wall to the first side wall so as to limit the axial movement of the first shield.

The further improvement scheme is as follows: the ribs are arranged on the inner wall of the second shield at even intervals along the circumferential direction.

The further improvement scheme is as follows: the first protective cover is provided with an annular hoop used for being connected with the machine shell, and the second protective cover is provided with a semicircular notch avoiding the output end of the motor.

The further improvement scheme is as follows: the semicircular gap of the first side wall is larger than the semicircular gap of the second side wall.

Compared with the prior art, the utility model discloses following beneficial effect has: through set up the elastic component between first guard shield and second guard shield in order to compensate the clearance between the guard shield and provide the pretightning force to first guard shield, avoid because of the wearing and tearing that the assembly clearance caused, reduce simultaneously in the use vibrations and the noise that lead to because of the machine operation between the guard shield. The utility model discloses can to a certain extent lead to joining in marriage current guard shield in the market, wide and long service life of application face, the change of guard shield function can be realized to manual simple operation, has improved the travelling comfort and the convenience of operation.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

FIG. 1 is a schematic view of a corner grinder according to a preferred embodiment of the present invention;

FIG. 2 is an exploded schematic view of the shroud assembly;

fig. 3 is an assembled schematic view of the shroud assembly.

The meaning of the reference symbols in the figures:

1. shield assembly 11, ribs 12, and slots

13. Elastic element 14, elastic sheet 141 and mounting section

142. Abutment section 15, top wall 2, first shield

3. Second shield 31, first side wall 32, second side wall

33. Stop part 4, casing 5 and working head

[ detailed description of the invention ]

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1, the angle grinder of a preferred embodiment of the present invention includes a housing 4, wherein the housing 4 is assembled by folding two half shells that are symmetrical up and down or symmetrical left and right. The machine shell 4 can be held by a user, one end of the machine shell 4 where the working head 5 is located is the front end, the other end opposite to the front end is the rear end, and a power source, a motor, a transmission assembly and an output shaft are sequentially arranged in the machine shell 4 from back to front. The power source adopts a battery or a plug-in peripheral power supply to supply power to the motor, the motor drives the working head 5 to rotate relative to the shell 4 through the output end, the output end of the motor comprises a transmission assembly and an output shaft, the transmission assembly is used for realizing transmission between the motor and the output shaft, the output shaft is used for outputting torque force under the driving of the transmission assembly, the front end of the output shaft extends out of the side surface of the shell 4, and the extending end is connected with the working head 5. According to the selected working scene, the working head 5 can be a grinding wheel, a steel wire wheel, a grinding disc, a saw blade and the like, and the shield component 1 is covered on the outer side of the working head 5 and is perpendicular to the output shaft, so that protection is provided when the angle grinder works.

Referring to fig. 2, the shield assembly 1 includes a first shield 2 and a second shield 3, the first shield 2 includes an annular hoop for connecting with the casing 4 and a protective cover body radially extending from the annular hoop, the annular hoop is sleeved on the periphery of the output shaft when the first shield 2 is connected to the casing 4, and the second shield 5 has a semicircular notch avoiding the output shaft. The second shroud 3 includes a first side wall 31 and a second side wall 32 provided on both axial sides of the working head 5, the first side wall 31 being located relatively close to the inside of the housing 4, and the second side wall 32 being located relatively far from the outside of the housing 4. Therefore, the semicircular gap of the first side wall 31 is larger than the semicircular gap of the second side wall 32, so that the protection range of the second side wall 32 is larger than that of the first side wall 31, and the operator can be protected better.

The first shroud 2 and the second shroud 3 are each in the form of a generally semicircular segment angled at 165 to 180 degrees so that the shroud assembly 1 at least partially receives the working head 5 to match the outer edge shape of the working head 5. The second shield 3 is detachably connected to the first shield 2, when the functions of cutting and the like need to be applicable to, the second shield 3 is connected to the first shield 2 to form a closed shield structure, the closed shield structure can cover the upper side of the working head 5, the protective covering surface for the working head 5 is effectively increased, the splashing of crushed aggregates is reduced, an operator is protected, and therefore the safety of the angle grinder in a cutting mode is improved. When the protective cover is applicable to grinding and other functions, the second protective cover 3 is detached, and the first protective cover 2 plays a protective role at the moment to form a semi-closed protective cover structure. When daily accomodating, the second guard shield 3 is installed and also can be avoided losing on first guard shield 2, has practiced thrift the complete machine volume simultaneously.

The first shield 2, the second shield 3 and the connection thereof will be described in detail below.

Referring to fig. 2, the shield assembly is shown in an exploded view, in a preferred embodiment of the present invention, the second shield 3 has a first sidewall 31 and a second sidewall 32 disposed at both axial sides of the working head 5, and a receiving space is formed between the first sidewall 31 and the second sidewall 32, in which the first shield 2 can be assembled. At least two stopping portions 33 for limiting the circumferential rotation of the first shield 2 are provided on the lower end side of the first sidewall 31, and the stopping portions 33 are further provided as protrusions extending radially from the end side of the first sidewall 31 and bent in the direction of the second sidewall 32. The blocking portion 33 can be deformed under the action of external force, the second shield 3 is separated from the first shield 2, the function of the shield can be replaced through manual simple operation, and the comfort and convenience of operation are improved. The second shield 3 may also be mounted on the first shield 2 in different ways, such as a bayonet connection, a snap connection, a screw connection, etc., which are not described in detail herein for reasons of space.

In one embodiment, the first shield 2 is a metal member, the second shield 3 is a plastic member, and the stopper 33 is integrally formed with the second shield 3, so as to ensure the stability and reliability of the second shield 3 assembled on the first shield 2.

Because there is the fit-up gap generally between first guard shield and the second guard shield, the utility model discloses a set up the elastic component between first guard shield and second guard shield and provide the pretightning force with the compensation clearance and to first guard shield, avoid because of the wearing and tearing that the fit-up gap caused, promote life. Referring to fig. 3, the second shield 3 further includes an arc-shaped top wall 15 connected between the first side wall 31 and the second side wall 32, at least one elastic element 13 is disposed inside the top wall 15, and the elastic element 13 may be a deformable material with resilience, such as a rubber strip, a spring, an elastic sheet, and the like. The elastic element 13 is abutted against the outer peripheral surface of the first shield 2 to compensate the radial clearance, and provides radial pretightening force for the first shield 2, so that the vibration and noise caused by the machine operation between the first shield 2 and the second shield 3 in the use process are reduced. The second shield 3 forms an accommodating space of the first shield 2, one or more clamping grooves 12 are arranged in the accommodating space, elastic pieces 14 are arranged in the clamping grooves 12, and the elastic pieces 14 are clamped between the second side wall 32 and the first shield 2. One end of the elastic sheet 14 is connected to the second sidewall 32, and the other end of the elastic sheet 14 abuts against the first shield 2. Further, the elastic sheet 14 has an installation section 141 and an abutting section 142 connected end to end, and both the installation section 141 and the abutting section 142 are U-shaped structures. During assembly, the mounting section 141 is located on one side of the second side wall 32, the abutting section 142 is located on one side of the first shield 2, the mounting section 141 is inserted into the slot 12, and the mounting section 141 extends to abut against the inner wall of the slot 12 under the action of elastic force, so that the elastic piece 14 is prevented from falling off in the using process. The abutting section 142 abuts against the side wall of the first protective cover 2 to compensate the axial gap, provides an axial pretightening force for the first protective cover 2, and reduces vibration and noise caused by machine operation between the first protective cover 2 and the second protective cover 3 in the using process.

As an embodiment, in order to further enhance the assembling stability of the shield assembly, the inner side of the arc top wall of the second shield 3 is provided with a plurality of ribs 11, and the plurality of ribs 11 protrude from the second side wall 32 to the first side wall 31 and are uniformly spaced along the inner circumference of the arc top wall of the second shield 3 to limit the axial degree of freedom of the first shield 2.

The utility model discloses a set up the clearance of elastic component in order to compensate between the guard shield and provide the pretightning force to first guard shield between first guard shield and second guard shield, avoid because of the wearing and tearing that the fit-up gap caused, reduce vibrations and the noise that leads to because of the machine operation between the guard shield in the use simultaneously. The utility model discloses can to a certain extent lead to joining in marriage current guard shield on the market, wide and long service life of application, the change of guard shield function can be realized to manual simple operation, has improved travelling comfort and the convenience of operation.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An angle grinder, comprising: the protective cover assembly comprises a first protective cover suitable for being connected with the machine shell and a second protective cover covering the outer side of the first protective cover, and the first protective cover and the second protective cover form a closed protective cover structure; the method is characterized in that: the second protective cover is provided with a first side wall and a second side wall which are arranged on two axial sides of the working head, an accommodating space is formed between the first side wall and the second side wall, the first protective cover is located in the accommodating space, an elastic piece is arranged in the second protective cover, and the elastic piece abuts against the space between the first protective cover and the inner wall of the second protective cover so as to provide pretightening force for the first protective cover.

2. The angle grinder of claim 1, wherein: an elastic sheet connected to the second side wall is arranged in the second protective cover and abuts against the first protective cover so as to provide axial pretightening force for the first protective cover.

3. The angle grinder of claim 2, wherein: the shell fragment has installation section and butt section that all is U type structure, be equipped with the draw-in groove in the accommodation space, the installation section peg graft in the draw-in groove, butt section butt in first guard shield.

4. The angle grinder of claim 1, wherein: the second protective cover also comprises a top wall connected between the first side wall and the second side wall, and at least one elastic element is arranged on the inner side of the top wall so as to provide radial pre-tightening force for the first protective cover.

5. The angle grinder of claim 1, wherein: the second shield is provided with at least two stopping portions located on the end side of the first side wall, and the first shield is located between the at least two stopping portions to limit circumferential rotation of the first shield.

6. The angle grinder of claim 5, wherein: the stopping part is a protrusion which extends from the end side of the first side wall in the radial direction and is formed by bending towards the direction of the second side wall.

7. The angle grinder of claim 1, wherein: the inner wall of the second shield is provided with a plurality of ribs, and the plurality of ribs protrude from the second side wall to the first side wall so as to limit the axial movement of the first shield.

8. The angle grinder of claim 7, wherein: the ribs are arranged on the inner wall of the second shield at even intervals along the circumferential direction.

9. The angle grinder of claim 1, wherein: the first protective cover is provided with an annular hoop used for being connected with the shell, and the second protective cover is provided with a semicircular notch avoiding the output end of the motor.

10. The angle grinder of claim 9, wherein: the semicircular gap of the first side wall is larger than the semicircular gap of the second side wall.