CN211073058U

CN211073058U - Quick-change structure for protective cover of angle grinder

Info

Publication number: CN211073058U
Application number: CN201921863791.5U
Authority: CN
Inventors: 朱群山; 李娜
Original assignee: Lvgeluo Machinery Ningbo Co ltd
Current assignee: Lvgeluo Machinery Ningbo Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-24
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to the technical field of angle grinder shields, in particular to a quick change structure of a protective cover of an angle grinder, which comprises a first protective cover and a second protective cover, wherein the first protective cover surrounds an output shaft of the angle grinder and is detachably connected with the angle grinder, the second protective cover surrounds the first protective cover and is detachably connected with the first protective cover, the first protective cover and the second protective cover are both fan-shaped annular shells, the end surface of the first protective cover, which is far away from the angle grinder, is open, and the inner circumferential surface of the second protective cover is open; the top of the second protective cover is provided with a clamping groove, the top of the first protective cover is provided with a first clamping part which can be used for the first protective cover to be rotatably inserted into the clamping groove, and the two sides of the second protective cover are provided with second clamping parts which are clamped with the two sides of the first protective cover and block the second protective cover from rotating around the first protective cover; the first protective cover and the second protective cover are combined in a single step, simple in process and convenient to operate, the first protective cover is an integrally formed metal piece, the second protective cover is an integrally injection-molded plastic piece, and production cost is low.

Description

Quick-change structure for protective cover of angle grinder

Technical Field

The utility model relates to an angle mill guard shield technical field, concretely relates to safety cover quick change structure of angle mill.

Background

The angle grinder is a grinding apparatus for cutting and polishing, slice and abrasive disc two kinds of forms when using, because angle grinder rotational speed is high, use the saw bit, when meetting hard material that pressurizes hard or cut during the cutting piece hard, very easily appear blocking, the saw bit, the cutting piece is cracked to splash, perhaps the machine flicks the condition out of control, light then damage article, it then hurts the people to be heavy, for avoiding the emergence of above-mentioned danger, when using the angle grinder, can install the protection casing usually, however, the protection casing structure that abrasive disc and slice correspond is not the same, the abrasive disc is half protective structure, the section is full protective structure. It is common in the market that directly join in marriage two kinds of guard shields shipment, during the use, to section or abrasive disc operation, need change corresponding protection casing, the operation is very inconvenient.

Chinese patent CN208261956U discloses an angle grinder, comprising: a housing; the output shaft at least partially extends out of the shell, and the output shaft can rotate relative to the shell by taking the first axis as a shaft; the shaft sleeve is fixedly connected to the shell, and the output shaft penetrates through the shaft sleeve; the first shield surrounds the output shaft and is detachably connected with the shaft sleeve; the second shield surrounds at least part of the first shield and is detachably connected with the first shield; the angle grinder further comprises: a connector for connecting the second shield to the first shield; the second shield also forms or has attached thereto: the mounting part is used for mounting a connecting piece; wherein the connecting member is formed separately from the mounting portion.

The first and second shrouds used in the angle grinder disclosed in this patent have the following disadvantages:

1. the second shield has a complex structure and comprises a plastic part and a metal part, so that the cost is high;

2. the combination of the first shield and the second shield requires a plurality of steps and is complex to operate.

There is therefore a need for a new protective hood for an angle grinder, which should be simple to mount and dismount and which is inexpensive.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safety cover quick change structure of angle grinder, the combination step of first guard shield and second guard shield is single, the process is simple, convenient operation to first guard shield is integrated into one piece's metalwork, and the second guard shield is integrative injection moulding's working of plastics, low in production cost.

To achieve the purpose, the utility model adopts the following technical proposal:

the quick-change structure comprises a first protective cover and a second protective cover, wherein the first protective cover surrounds an output shaft of the angle grinder and is detachably connected with the angle grinder, the second protective cover surrounds the first protective cover and is detachably connected with the first protective cover, the first protective cover and the second protective cover are both fan-shaped annular shells, the end face, far away from the angle grinder, of the first protective cover is open, and the inner circumferential surface of the second protective cover is open;

the top of second guard shield is provided with the joint groove, and the top of first guard shield is provided with the first joint portion that can supply first guard shield rotation to insert joint inslot portion, and the both sides of second guard shield are provided with the both sides joint with first guard shield and obstruct the second guard shield around the rotatory second joint portion of first guard shield, and first joint portion is an organic piece with first guard shield, and second joint portion is an organic piece with the second guard shield.

As an optimal scheme of a quick change structure of a protective cover of an angle grinder, the top of a second protective cover is provided with an upward convex sliding groove, the projection of the sliding groove in the direction of an output shaft of the angle grinder is in a fan-ring shape, the sliding groove extends to the other end of the second protective cover from one end of the second protective cover around a first protective cover, and the top end of the first protective cover is provided with a sliding strip in sliding fit with the sliding groove.

As a preferred scheme of a quick change structure of a protective cover of an angle grinder, a slide bar comprises a plurality of convex strips which are uniformly distributed around an output shaft of the angle grinder.

As a preferred scheme of a quick change structure of a protective cover of an angle grinder, a gap is reserved between the inner wall of the second protective cover and the outer wall of the first protective cover, clamping hooks which are abutted to the two sides of the first protective cover are arranged on the two sides of the second protective cover, and the clamping hooks have elasticity.

As a preferable scheme of the quick-change structure of the protective cover of the angle grinder, the second protective cover is provided with a force reducing opening which is horizontally sunken towards the other side of the second protective cover along the joint of the clamping hook and the second protective cover.

As a preferred scheme of a quick-change structure of a protective cover of an angle grinder, the clamping hook is in a wedge shape, and one end, far away from the second protective cover, of the clamping hook is an acute angle.

The utility model has the advantages that:

the first protective cover is a fan-shaped annular protective cover shell with an open end face, the second protective cover is a fan-shaped annular protective cover shell with an open inner circumferential face, the first protective cover is arranged on an output shaft of the angle grinder through a clamping ring and a bolt and is used for a grinding mode of the angle grinder, and grinding debris of the angle grinder is prevented from splashing to the direction of a user by the first protective cover; rotatory second guard shield makes its rotatory card in joint groove go into first joint portion, makes the both ends joint of second joint portion and first guard shield afterwards, can install the second guard shield on first guard shield for angle mill cutting mode, the second guard shield prevents that the cutting piece of angle mill from splashing to user's direction.

1. The first shield and the second shield are combined in a single step, simple in process and convenient to operate;

2. the first shield is an integrally formed metal piece, and the second shield is an integrally injection-molded plastic piece, so that the production cost is low.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a perspective view of an angle grinder according to an embodiment of the present invention;

fig. 2 is a first exploded perspective view of an angle grinder according to an embodiment of the present invention;

fig. 3 is a second exploded perspective view of an angle grinder according to an embodiment of the present invention;

fig. 4 is a perspective view of a quick-change structure for a protective cover of an angle grinder according to an embodiment of the present invention;

fig. 5 is an exploded perspective view of a quick-change structure for a protecting cover of an angle grinder according to an embodiment of the present invention;

fig. 6 is a perspective view of a first protection cover of a quick-change structure for a protection cover of an angle grinder according to an embodiment of the present invention;

fig. 7 is a perspective view of a second protection cover of a quick-change structure for a protection cover of an angle grinder according to an embodiment of the present invention;

in the figure:

1. a first shield; 1a, a slide bar; 1a1, convex strips;

2. a second shield; 2a, a chute; 2b, a clamping hook; 2c, opening by reducing force.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 6, a quick-change structure for a protective cover of an angle grinder comprises a first protective cover 1 and a second protective cover 2,

the angle grinder comprises a first shield 1, a second shield 2, a fan-shaped shell, a first motor, a second motor and a motor, wherein the first shield 1 surrounds an output shaft of the angle grinder and is detachably connected with the angle grinder, the second shield 2 surrounds the first shield 1 and is detachably connected with the first shield 1, the first shield 1 and the second shield 2 are both fan-shaped annular shells, the end face, far away from the angle grinder, of the first shield 1 is open, and the inner circumferential surface of the second shield 2 is;

the top of second guard shield 2 is provided with the joint groove, and the top of first guard shield 1 is provided with the first joint portion that can supply first guard shield 1 rotation to insert the joint inslot portion, and the both sides of second guard shield 2 are provided with the both sides joint with first guard shield 1 and obstruct second guard shield 2 around the rotatory second joint portion of first guard shield 1, and first joint portion is an organic piece with first guard shield 1, and second joint portion is an organic piece with second guard shield 2.

The first shield 1 is a fan-shaped annular shield shell with an open end face, the second shield 2 is a fan-shaped annular shield shell with an open inner circumferential face, the first shield 1 is mounted on an output shaft of the angle grinder through a clamping ring and a bolt and used for a grinding mode of the angle grinder, and grinding debris of the angle grinder is prevented from splashing to a user by the first shield 1; rotatory second guard shield 2 makes its joint groove rotation card go into to first joint portion on, makes the both ends joint of second joint portion and first guard shield 1 afterwards, can install second guard shield 2 on first guard shield 1 for angle mill cutting mode, second guard shield 2 prevents that the cutting piece of angle mill from splashing to user's direction.

The top of second guard shield 2 is provided with the bellied spout 2a that makes progress, and the projection of spout 2a in angle mill output shaft direction is fan ring shape, and spout 2a starts to encircle first guard shield 1 from the one end of second guard shield 2 and extends to the other end of second guard shield 2, and the top of first guard shield 1 is provided with the draw runner 1a with spout 2a sliding fit.

Spout 2a constitutes the joint groove, and draw runner 1a constitutes first joint portion, aims at draw runner 1a with spout 2a, then rotates second guard shield 2 and makes second guard shield 2 establish gradually on first guard shield 1, and inside slide 1a slided into spout 2a completely, preliminary joint was accomplished to first guard shield 1 and second guard shield 2, and draw runner 1a and spout 2a are used for preventing first guard shield 1 and second guard shield 2 for the axial and the radial movement of angle mill output shaft axis.

The slide bar 1a comprises a plurality of convex strips 1a1 uniformly distributed around the output shaft of the angle grinder.

The sliding strip 1a which is in sliding fit with the sliding groove 2a is combined by the multi-section convex strips 1a1, so that the problem that the sliding strip 1a cannot slide in the sliding groove 2a due to large part tolerance can be effectively solved, and even if part of the convex strips 1a1 cannot be in good sliding fit with the sliding groove 2a, the convex strips 1a1 can be clamped into the sliding groove 2a by pulling the sliding groove 2a to slightly deform.

A gap is left between the inner wall of the second shield 2 and the outer wall of the first shield 1, and two sides of the second shield 2 are provided with a butt joint

The hooks 2b on both sides of the first shield 1 are elastic, and the hooks 2b are elastic.

Before the installation second guard shield 2, the user breaks off outward with the trip 2b of second guard shield 2 one side, then goes into first guard shield 1 with second guard shield 2 rotation card on, and trip 2b resets and the butt live in first guard shield 1's both sides under the effect of self resilience force to make under no exogenic action, second guard shield 2 can not be rotatory for first guard shield 1.

The second shield 2 is provided with a force reducing opening 2c which is horizontally recessed toward the other side of the second shield 2 along the joint of the hook 2b and the second shield 2.

The force reducing opening 2c divides the part of the second shield 2 directly contacting with the hook 2b from the second shield 2 integrally, and the part of the second shield 2 directly contacting with the hook 2b is equivalent to an elastic sheet, so that the hook 2b has the elasticity of outward deformation.

The hook 2b is wedge-shaped, and one end of the hook 2b away from the second shield 2 is acute.

The end of the hook 2b facing the first shield 1 is acute, so that when a user rotatably mounts the second shield 2 on the first shield 1, the end of the hook 2b naturally springs outward when contacting the burr on the outer surface of the first shield 1, thereby smoothly mounting the burr on the first shield 1 beyond the surface of the first shield 1.

The utility model discloses a theory of operation:

the first shield 1 is a fan-shaped annular shield shell with an open end face, the second shield 2 is a fan-shaped annular shield shell with an open inner circumferential face, the first shield 1 is mounted on an output shaft of the angle grinder through a clamping ring and a bolt and used for a grinding mode of the angle grinder, and grinding debris of the angle grinder is prevented from splashing to a user by the first shield 1;

the user breaks the trip 2b of second guard shield 2 one side outwards, aim at draw runner 2a with spout 2a, then rotate second guard shield 2 and make second guard shield 2 cover establish gradually on first guard shield 1, inside slide 1a slides in the spout 2a completely, draw runner 1a and spout 2a are used for preventing first guard shield 1 and second guard shield 2 for the axial and radial movement of angle mill output shaft axis, trip 2b resets and the both sides of catching first guard shield 1 under the effect of self resilience force, thereby make under no external force, second guard shield 2 can not rotate for first guard shield 1, first guard shield 1 and second guard shield 2 accomplish the joint, be used for angle mill cutting mode, second guard shield 2 prevents that the cutting piece of angle mill from splashing to user's direction.

It should be understood that the above-described embodiments are merely illustrative of the preferred embodiments of the present invention and the technical principles thereof. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. A quick-change structure for a protective cover of an angle grinder is characterized by comprising a first protective cover (1) and a second protective cover (2), wherein the first protective cover (1) surrounds an output shaft of the angle grinder and is detachably connected with the angle grinder, the second protective cover (2) surrounds the first protective cover (1) and is detachably connected with the first protective cover (1), the first protective cover (1) and the second protective cover (2) are both fan-shaped annular shells, the end face, far away from the angle grinder, of the first protective cover (1) is open, and the inner circumferential surface of the second protective cover (2) is open;

the top of second guard shield (2) is provided with the joint groove, the top of first guard shield (1) is provided with the first joint portion that can supply first guard shield (1) rotation to insert the joint inslot portion, the both sides of second guard shield (2) be provided with the both sides joint of first guard shield (1) and obstruct second guard shield (2) to encircle the rotatory second joint portion of first guard shield (1), first joint portion is an organic piece with first guard shield (1), second joint portion is an organic piece with second guard shield (2).

2. The quick-change structure for the protective cover of the angle grinder is characterized in that a sliding groove (2a) protruding upwards is formed in the top of the second protective cover (2), the projection of the sliding groove (2a) in the direction of the output shaft of the angle grinder is in a fan-ring shape, the sliding groove (2a) extends from one end of the second protective cover (2) to the other end of the second protective cover (2) around the first protective cover (1), and a sliding strip (1a) in sliding fit with the sliding groove (2a) is arranged at the top end of the first protective cover (1).

3. The quick-change structure for the protective cover of the angle grinder is characterized in that the slide bar (1a) comprises a plurality of convex strips (1a1) which are uniformly distributed around the output shaft of the angle grinder.

4. The quick-change structure for the protective cover of the angle grinder is characterized in that a gap is reserved between the inner wall of the second protective cover (2) and the outer wall of the first protective cover (1), clamping hooks (2b) which abut against the two sides of the first protective cover (1) are arranged on the two sides of the second protective cover (2), and the clamping hooks (2b) have elasticity.

5. The quick-change structure for the protective cover of the angle grinder as claimed in claim 4, characterized in that the second shield (2) is provided with a force-reducing opening (2c) which is horizontally recessed toward the other side of the second shield (2) along the joint of the hook (2b) and the second shield (2).

6. The quick-change structure for the protective cover of the angle grinder as claimed in claim 4, wherein the hook (2b) is wedge-shaped, and the end of the hook (2b) away from the second protective cover (2) is acute-angled.