CN219945663U - Angle grinder - Google Patents

Abstract

The utility model relates to an angle grinder, comprising: a housing; an output shaft at least partially disposed in the housing and configured to mount a tool attachment; a motor disposed in the housing and driving the output shaft to rotate; a shroud at least partially surrounding the tool attachment after the output shaft mounts the tool attachment; further comprises: a bearing block connected to the housing and disposed around the output shaft; a base at least partially between the shroud and the bearing housing; the locking piece is connected inside the base in a sliding way; an elastic member which deforms after the shield is installed and has an acting force for pressing the locking member; a latch located on the bearing housing or the shroud and at least partially receiving a latch; thereby being convenient for adjusting the protection angle of the shield.

Description

Angle grinder

Technical Field

The utility model relates to the technical field of electric tools, in particular to an angle grinder.

Background

The angle grinder is a portable electric tool for cutting or polishing, and is mainly used for cutting, polishing, brushing metal or stone, etc. With the development of angle grinders, angle grinders are equipped with shields for protection based on requirements of safety production specifications.

In the related art, as in the chinese patent with application number CN200910183827X, an angle grinder is disclosed, which comprises a gear box, a rotor, a front rotor bearing, a rear rotor bearing, a bearing box, an output shaft bearing and a lock pin, wherein one end of the output shaft passes through the bearing box to be fixedly connected with a grinding wheel of the angle grinder, the other end of the output shaft is fixedly connected with a large gear, the large gear is meshed with a pinion fixed on a front rotor end shaft, a wind shield and a stator are connected to the outer side of the rear rotor bearing, and the wind shield and the stator are both sleeved on the rear rotor end shaft; elastic oil seals are respectively arranged between the front rotor bearing and the front rotor end shaft and between the output shaft bearing and the output shaft, O-shaped sealing rings are respectively sleeved on a lock pin of the gear box and an end cover opening of the bearing box, which is close to the gear box side, on the periphery of the rear rotor bearing, a bearing aluminum sleeve is sleeved, and a dust-proof ring is further arranged between the rear rotor bearing and the rear rotor end shaft.

However, the current shield is directly fixed on the casing, and when the cutting angle is adjusted, the shield is inconvenient to protect other angles, so that improvement is needed.

Disclosure of Invention

Based on the above, it is necessary to provide an angle grinder for solving the problem that the protection angle is inconvenient to adjust.

In order to solve the technical problems, the utility model is realized as follows:

in one embodiment, there is provided an angle grinder comprising: a housing;

an output shaft at least partially disposed in the housing and configured to mount a tool attachment;

a motor disposed in the housing and driving the output shaft to rotate;

a shroud at least partially surrounding the tool attachment after the output shaft mounts the tool attachment;

further comprises:

a bearing block connected to the housing and disposed around the output shaft;

a base at least partially between the shroud and the bearing housing;

the locking piece is connected inside the base in a sliding way;

an elastic member which deforms after the shield is installed and has an acting force for pressing the locking member;

and the locking part is positioned on the bearing seat or the protective cover and at least partially receives the locking part.

Optionally, a support member is disposed on one of the bearing seat or the shield away from the latch portion, and the elastic member is sleeved on the support member or the support member is sleeved on the elastic member.

Optionally, the locking piece is provided with at least one guide surface, and the side wall of the locking part is provided with a yielding surface matched with the guide surface.

Optionally, be provided with spacing portion on the kayser spare, the base has been seted up the groove that slides that supplies kayser spare to slide, the inslot wall that slides is equipped with the backstop portion that can offset with spacing portion.

Optionally, a supporting part is arranged at one side of the locking piece, which is away from the locking part, and the supporting part is sleeved on the elastic piece or the elastic piece is sleeved on the supporting part.

Optionally, the locking piece is a ball, the locking part is a round hole, and the locking parts are distributed on the same circle; a limiting groove is formed between two adjacent locking parts; the base is provided with a sliding groove for sliding the clamping locking piece, the inner wall of the sliding groove is provided with a stop part which can be propped against the ball, the elastic piece is a compression spring, and the diameter of the ball is larger than the inner diameter of the compression spring.

Optionally, the outer side wall of the base is further provided with a locking piece and a driving piece, the locking piece is driven to be inserted into the sliding groove, the driving piece provides power for the locking piece to be inserted into the sliding groove, and when the locking piece is received by the locking part, the locking piece is blocked by the locking piece.

Optionally, a mounting hole is formed in the center of the shield, and a limiting block is arranged on the inner wall of the mounting hole towards the center; the bearing seat comprises a mounting part and a bearing part, wherein a limiting flange is arranged at one end, far away from the mounting part, of the bearing part, and a notch for inserting a limiting block is arranged on the limiting flange.

Optionally, the bearing part is provided with the slide that supplies the stopper to insert in the limit flange one side that is close to the installation department.

Optionally, the mounting hole inner wall is provided with prevents slow-witted piece, be provided with on the spacing edge of a wing and prevent slow-witted slot, prevent slow-witted piece and stopper asymmetric setting.

In the embodiment of the utility model, the locking part driven by the elastic part is clamped into the locking part, so that the protective cover can conveniently drive the base to rotate on the bearing seat, and the protection angle can be conveniently adjusted.

Drawings

FIG. 1 is a schematic view showing an internal structure of an angle grinder according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a shield structure according to an embodiment of the present utility model;

FIG. 3 is an exploded view of a shield structure according to an embodiment of the present utility model;

fig. 4 is an exploded view of a shield structure in another embodiment of the present utility model.

Description of the drawings: 1. a housing; 11. an output shaft; 12. a motor; 13. a shield; 131. a mounting hole; 132. a limiting block; 133. fool-proof blocks; 2. a bearing seat; 21. a mounting part; 22. a bearing part; 221. limit flanges; 222. a notch; 223. fool-proof slot; 224. a slideway; 3. a base; 31. a slip groove; 32. a stop portion; 4. a latch; 41. a limit part; 42. a support part; 43. a guide surface; 44. a locking surface; 5. an elastic member; 6. a latch portion; 61. a yielding surface; 62. a locking surface; 7. a support; 8. a tool attachment.

Description of the embodiments

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, fig. 1 shows a schematic internal structure of an angle grinder according to an embodiment of the present utility model, and the angle grinder provided by the embodiment of the present utility model includes a housing 1, an output shaft 11, a motor 12, a shield 13, a bearing housing 2, a base 3, a latch 4, an elastic member 5, and a latch 6. Wherein the output shaft 11 is at least partially arranged in the housing 1 and is used for mounting the tool attachment 8, and the motor 12 is arranged in the housing 1 and drives the output shaft 11 to rotate for driving the tool attachment 8 to operate. The shield 13 at least partially surrounds the tool attachment 8 after the output shaft 11 mounts the tool attachment 8 to provide a range of protection to the tool attachment 8.

Referring to fig. 1 and 2, fig. 2 shows an exploded view of a shield structure in an embodiment of the present utility model, a bearing housing 2 includes a mounting portion 21 and a bearing portion 22, the mounting portion 21 may be mounted on a housing 1 by bolts, the bearing portion 22 may be a cylindrical structure with two ends open, and one end may be integrally formed on the mounting portion 21; the bearing portion 22 may be provided around the output shaft 11. The base 3 may be at least partially located between the shield 13 and the mounting portion 21, and the base 3 may be connected to the shield 13 by a bolt, may be integrally formed with the shield 13, or may be integrally formed with the mounting portion 21.

Referring to fig. 2 and 3, fig. 3 shows a schematic internal structure of a sliding groove in an embodiment of the present utility model, where the latch 4 is slidably connected inside the base 3, the base 3 may be radially or axially provided with the sliding groove 31, in an embodiment of the present utility model, the sliding groove 31 is preferably axially provided, and the latch 4 is slidably connected in the sliding groove 31 along the axial direction. The elastic element 5 can be pressed against the catch element 4, and after the shield 13 has been installed, the elastic element 5 can be deformed and can have a pressure against the catch element 4. The elastic member 5 may be a spring, a wave washer, or a leaf spring, as long as it can provide elastic force along the length direction of the sliding groove 31, and the embodiment of the present utility model is preferably a spring. The locking part 6 is positioned on the bearing seat 2 or the shield 13, and the locking part 4 is clamped with the locking part 6 under the pressing force of the elastic part 5 and is at least partially received by the locking part 6.

Alternatively, a plurality of locking elements 4 are uniformly arranged along the circumference of the bearing portion 22, preferably four in the embodiment of the present utility model, and of course, those skilled in the art will understand that the number of locking elements 4 may be three, two, or even one or more. The plurality of locking parts 6 are uniformly distributed along the circumferential direction of the bearing seat 2, and the number of the locking parts 6 is larger than that of the locking pieces 4. In the embodiment of the utility model, the number of the locking parts 6 is preferably an integral multiple of the number of the locking parts 4, so that the shield 13 can be conveniently adjusted at all angles.

Optionally, a limiting part 41 is disposed on a side of the latch member 4 facing away from the latch portion 6, and the limiting part 41 may be integrally formed with the latch member 4, or may be mounted on the latch member 4, and in this embodiment, the limiting part 41 is preferably integrally formed with the latch member 4. The inner wall of one end of the sliding groove 31, which is close to the locking part 6, is formed with a stop part 32, the size of a through hole formed by the stop part 32 may be greater than or equal to the size of the locking part 4, and meanwhile, the size of the limiting part 41 may be greater than the size of a through hole formed by the stop part 32, so that when the elastic part 5 abuts against the locking part 4 to move, the limiting part 41 can abut against the stop part 32, thereby limiting the position of the locking part 4.

Optionally, the support member 7 is disposed on one of the bearing seat 2 or the shield 13 away from the latch portion 6, and in this embodiment, the shield 13 is provided, and the support member 7 may be mounted on the shield 13 or may be integrally formed on the shield 13, and in this embodiment, the support member is preferably integrally formed on a surface of the shield 13 facing the base 3. The elastic member 5 is sleeved on the supporting member 7 or the supporting member 7 is sleeved on the elastic member 5, and in the embodiment of the utility model, the elastic member 5 is preferably sleeved on the supporting member 7, so that the stable expansion and contraction of the elastic member 5 are maintained.

Optionally, a supporting part 42 is arranged at one side of the locking piece 4 away from the locking part 6, the supporting part 42 can be in a rod shape, and the supporting part 42 can be installed on the locking piece 4 or can be integrally formed on the surface of the locking piece 4; the support 42 and the locking element 4 are preferably integrally formed. Each latch 4 may be provided with two support members 7, and each support member 7 may be sleeved with an elastic member 5. Of course, it will be appreciated that the support member 7 may also be sleeved on the elastic member 5, as will be appreciated by those skilled in the art.

Optionally, a mounting hole 131 is formed in the center of the shield 13, a limiting block 132 is formed on the inner wall of the mounting hole 131 towards the center of the mounting hole, and the limiting block 132 and the shield 13 can be integrally formed. The end of the bearing portion 22 away from the mounting portion 21 is provided with a limit flange 221, and the limit flange 221 may be mounted on the bearing portion 22 or may be integrally formed at the end of the bearing portion 22. The limiting flange 221 is provided with a notch 222, and the limiting block 132 can rotate along the circumferential direction of the bearing part 22 after moving along the radial direction of the bearing part 22 from the notch 222.

Optionally, the inner wall of the mounting hole 131 is convexly provided with a foolproof block 133, and the limiting flange 221 is provided with a foolproof slot 223, and the foolproof block 133 and the limiting block 132 are asymmetrically arranged, so that the shield 13 can be mounted on the bearing portion 22 only under one angle.

Optionally, a slide 224 for inserting the stopper 132 is provided on a side of the bearing portion 22, which is located on the side of the limiting flange 221 near the mounting portion 21, and the stopper 132 may be inserted into the slide 224 to rotate along the circumferential direction of the bearing portion 22.

Optionally, a locking piece and a driving piece are further installed on the outer side wall of the base 3, and the locking piece is inserted into the sliding groove under the driving of the driving piece. The driving piece can slide along the radial direction of the base and insert into the sliding groove 31, and can also be hinged on a hinge shaft on a bracket integrally formed on the outer side wall of the base and insert into the sliding groove 31, and the driving piece can be inserted into the sliding groove 31 along the direction perpendicular to the sliding groove 31. The driving member may be a spring or a torsion spring as long as the power for inserting the locking member into the sliding groove 31 can be provided. When the latch 4 is received by the latch 6, the latch 4 is blocked by the lock to lock the lock 4 in the latch 6.

Optionally, the latch 4 is provided with at least one guiding surface 43, and the guiding surface 43 is configured such that the distance between the latch 4 and the limiting portion 41 is gradually reduced, and the guiding surface 43 may be an arc surface or an inclined surface, so that the latch 4 is driven to retract in the process of rotating the latch 4. It will be understood, of course, that the guide surface 43 is provided on only one side of the latch 4 for unidirectional rotation, and at the same time, the surface of the latch 6 opposite to the guide surface 43 is provided with a relief surface 61, and the relief surface 61 may be an inclined surface or an arc surface, as long as the distance from the mounting portion 21 gradually increases and can be relieved to the guide surface 43. The side of the locking part 6, which is far away from the relief surface 61, is provided with a vertical locking surface 62, and the side of the locking part 4, which is far away from the guide surface 43, is provided with a locking surface 44, and the locking surface 44 can abut against the locking surface 62 so as to realize unidirectional rotation of the shield 13. Of course, for bidirectional rotation, the guide surfaces 43 may be provided on both sides of the latch 4, and correspondingly, the relief surfaces 61 may be provided on both sides of the latch 6 for relief, as will be appreciated by those skilled in the art, and are also within the scope of the present utility model.

Referring to fig. 4, fig. 4 shows an exploded schematic view of a shield structure of an angle grinder according to another embodiment of the present utility model, optionally, the latch 4 may be a ball, the latch 6 may be a round hole, the positions of the plurality of latches 6 are distributed on a circular track formed by the same circle center and the same radius, and a limit groove is communicated between two adjacent latches 6 to enable the latch 4 to smoothly switch between two adjacent latches 6.

Optionally, the inner wall of the sliding groove 31 is provided with a stop portion 32 abutting against the ball, and the diameter of the stop portion 32 is smaller than that of the ball. The elastic member 5 may be a compression spring, and the diameter of the ball is larger than that of the compression spring, so that the ball is conveniently ejected out, and part of the ball is clamped into the clamping lock part 6 for locking.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An angle grinder, comprising: a housing (1);

an output shaft (11) which is arranged at least partially in the housing (1) and is used for mounting a tool attachment (8);

a motor (12) which is disposed in the housing (1) and drives the output shaft (11) to rotate;

-a shield (13) at least partially surrounding the tool attachment (8) after the output shaft (11) has been fitted with the tool attachment (8);

characterized by further comprising:

a bearing seat (2) connected to the housing (1) and arranged around the output shaft (11);

-a base (3) at least partially located between the shield (13) and the bearing housing (2);

the locking piece (4) is connected inside the base (3) in a sliding way;

an elastic member (5) which deforms after the shield (13) is mounted and has a force against the latch member (4);

a latch (6) located on the bearing housing (2) or the shield (13) and at least partially receiving the latch (4).

2. The angle grinder according to claim 1, characterized in that one of the bearing block (2) or the shield (13) remote from the latch (6) is provided with a support (7), the elastic member (5) being sleeved on the support (7) or the support (7) being sleeved on the elastic member (5).

3. An angle grinder according to claim 1, characterized in that the locking element (4) is provided with at least one guide surface (43), and that the side wall of the locking element (6) is provided with a relief surface (61) cooperating with the guide surface (43).

4. The angle grinder according to claim 1, wherein the latch (4) is provided with a limit part (41), the base (3) is provided with a sliding groove (31) for sliding the latch (4), and the inner wall of the sliding groove (31) is provided with a stop part (32) capable of abutting against the limit part (41).

5. The angle grinder according to claim 1, characterized in that the side of the latching element (4) facing away from the latching element (6) is provided with a support (42), the support (42) being arranged on the elastic element (5) or the elastic element (5) being arranged on the support (42).

6. The angle grinder according to claim 1, characterized in that the locking element (4) is a ball, the locking portions (6) are round holes, the locking portions (6) are distributed on the same circle; a limiting groove is arranged between two adjacent locking parts (6); the base (3) is provided with a sliding groove (31) for sliding the clamping locking piece (4), the inner wall of the sliding groove (31) is provided with a stop part (32) which can be propped against the ball, the elastic piece (5) is a compression spring, and the diameter of the ball is larger than the inner diameter of the compression spring.

7. An angle grinder according to claim 4 or 6, characterized in that the outer side wall of the base (3) is further provided with a locking element which is driven into the sliding groove, and a driving element which provides the power for the locking element to be inserted into the sliding groove, the locking element (4) being blocked by the locking element when the locking element (4) is received by the locking portion (6).

8. The angle grinder according to claim 1, characterized in that the shield (13) is centrally provided with a mounting hole (131), the inner wall of the mounting hole (131) being centrally provided with a stopper (132); the bearing seat (2) comprises a mounting part (21) and a bearing part (22), wherein a limiting flange (221) is arranged at one end, far away from the mounting part (21), of the bearing part (22), and a notch (222) for inserting a limiting block (132) is arranged on the limiting flange (221).

9. The angle grinder of claim 8, wherein the bearing portion (22) is provided with a slide (224) for inserting the stopper (132) at a side of the stopper flange (221) near the mounting portion (21).

10. The angle grinder of claim 8, wherein the inner wall of the mounting hole (131) is provided with a fool-proof block (133), the limiting flange (221) is provided with a fool-proof slot (223), and the fool-proof block (133) and the limiting block (132) are asymmetrically arranged.