Angle grinder shield mounting structure and angle grinder

Abstract

The utility model discloses an angle grinder shield mounting structure and an angle grinder. The angle grinder shield mounting structure comprises a shield, a bearing seat, a supporting seat, an elastic piece and a clamping piece. A mounting hole is formed in the protective cover, one end of the bearing seat is detachably and rotatably connected to the mounting hole, a clamping sliding groove is formed in the outer ring of the bearing seat in the circumferential direction, the supporting seat is connected with the protective cover and arranged on the bearing seat in a sleeving mode, one end of the elastic piece is connected with an inner ring of the supporting seat, and the clamping piece is connected with the other end of the elastic piece and embedded into the clamping sliding groove. According to the angle grinder protective cover installation structure and the angle grinder, through the combination of the clamping piece and the clamping sliding groove, the protective cover and the bearing seat can be limited to be separated in the axial direction in the rotating process of the protective cover, and normal disassembly of the protective cover is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of angle grinders, and in particular relates to an angle grinder guard installation structure and an angle grinder. Background Art

[0002] An angle grinder is a portable power tool used for cutting or grinding, mainly used for cutting, grinding and brushing metal or stone.

[0003] In the related art, for example, a Chinese patent with application number CN2023212813233 discloses an angle grinder, which includes a housing, an output shaft, a motor, a shield, a bearing seat, a base, a locking piece, an elastic piece and a locking portion, etc. The output shaft is at least partially arranged in the housing and used to install tool accessories, the motor is arranged in the housing and drives the output shaft to rotate, the shield at least partially surrounds the tool accessories after the tool accessories are installed on the output shaft, the bearing seat is connected to the housing and arranged around the output shaft, and the base is at least partially located between the shield and the bearing seat; the locking piece is slidably connected to the inside of the base, the compression spring is deformed after the shield is installed and has a force to press the locking piece, the locking portion is located on the bearing seat or the shield and at least partially receives the locking piece, a mounting hole is provided in the center of the shield, a limit block is provided on the inner wall of the mounting hole toward the center, the bearing seat includes a mounting portion and a bearing portion, a limit flange is provided at one end of the bearing portion away from the mounting portion, and a notch for inserting the limit block is provided on the limit flange.

[0004] However, during the rotation of the shield of the above technical solution, there is a situation where the limit block is moved to the notch. At this time, the shield is affected by the compression spring and is very likely to pop out from the bearing seat, which seriously affects the normal use of the angle grinder. Utility Model Content

[0005] The utility model aims to provide an angle grinder shield installation structure and an angle grinder, which can limit the separation of the shield and the bearing seat and do not affect the normal disassembly of the shield.

[0006] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides an angle grinder shield mounting structure, including a shield, a bearing seat, a bearing seat, a support seat, an elastic member and a locking member. The shield is provided with a mounting hole, one end of the bearing seat is detachably rotatably connected to the mounting hole, a locking groove is provided on the outer ring of the bearing seat, the support seat is connected to the shield and sleeved on the bearing seat, one end of the elastic member is connected to the inner ring of the support seat, and the locking member is connected to the other end of the elastic member and embedded in the locking groove.

[0007] In one or more embodiments of the present invention, an outer ring of the bearing seat is axially provided with an installation groove for the locking member to pass through and enter the locking slide groove.

[0008] In one or more embodiments of the utility model, one end of the mounting groove extends to the end face of the bearing seat close to the shield, and the other end extends to the positioning slide groove. A limit block protruding toward the center of the circle is provided at the mounting hole. A slideway for inserting the limit block is opened on the outer circumference of the bearing seat. The slideway divides the mounting groove into a first mounting groove and a second mounting groove. The axial ends of the first mounting groove and the second mounting groove are both provided with guide surfaces.

[0009] In one or more embodiments of the present invention, a receiving groove is formed in the inner ring of the support seat, and the elastic member is arranged in the receiving groove.

[0010] In one or more embodiments of the present invention, one end of the receiving groove extends to the end of the support seat close to the shield, and a stopper is provided in the receiving groove, one end of the stopper abuts the shield, and the other end abuts the elastic member along the radial direction of the elastic member.

[0011] In one or more embodiments of the utility model, the receiving groove is provided with a radial opening, the retaining member partially protrudes out of the radial opening, and in the radial direction, the projection of the radial opening at least partially overlaps with the projection of the retaining member. In the radial direction, the radial opening at least partially abuts against the retaining member.

[0012] In one or more embodiments of the utility model, a notch is formed on the outer circumference of the bearing seat, one end of the notch extends to the end face of the bearing seat close to the shield, and the other end extends to the slideway. The angle grinder shield mounting structure has a fixed state and a disassembled state. In the fixed state, the limit block is located in the slideway and staggered with the notch. In the disassembled state, the limit block faces the notch, and the positioning member faces the mounting groove.

[0013] In one or more embodiments of the present invention, the elastic member is a spring, and the locking member is a steel ball.

[0014] In one or more embodiments of the present invention, a plurality of elastic members and locking members are provided, and each elastic member and each locking member is arranged at intervals.

[0015] Another specific embodiment of the utility model further provides an angle grinder, which includes the above-mentioned angle grinder shield installation structure.

[0016] Compared with the prior art, the angle grinder guard installation structure and the angle grinder of the utility model can limit the axial separation of the guard and the bearing seat during the rotation of the guard through the combination of the locking piece and the locking groove, and the elastic piece can provide radial movement space for the locking piece, so that when the operator applies axial force to pull the guard, the locking piece can be disengaged from the locking groove without affecting the normal disassembly of the guard. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only some implementations recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is an exploded structural diagram of an angle grinder in one embodiment of the utility model;

[0019] Figure 2 It is a cross-sectional structural diagram of an angle grinder in one embodiment of the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged view of part A;

[0021] Figure 4 It is an exploded structural diagram of the angle grinder guard installation structure in one embodiment of the utility model;

[0022] Figure 5 It is a three-dimensional structural diagram of a bearing seat in one embodiment of the utility model.

[0023] Explanation of main figure marks: 1. Guard, 101. Mounting hole, 102. Limit block, 2. Support seat, 201. Receiving groove, 202. Sliding groove, 3. Bearing seat, 301. Positioning slide groove, 302. Mounting groove, 3021. First mounting groove, 3022. Second mounting groove, 303. Slide way, 304. Guide surface, 305. Notch, 4. Elastic member, 5. Positioning member, 6. Stop block, 7. Compression spring, 8. Ratchet teeth, 9. Ratchet seat. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation of the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementations. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as “inner ring”, “outer ring”, “axial”, “radial”, “circumferential”, “top” and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] like Figure 1 and Figure 5 As shown, the angle grinder shield mounting structure in one embodiment of the utility model comprises a shield 1, a bearing seat 3, a support seat 2, an elastic member 4 and a retaining member 5. The shield 1 is provided with a mounting hole 101, one end of the bearing seat 3 is detachably and rotatably connected to the mounting hole 101, a retaining slot 301 is provided on the circumference of the outer ring of the bearing seat 3, the support seat 2 is connected to the shield 1 and sleeved on the bearing seat 3, one end of the elastic member 4 is connected to the inner ring of the support seat 2, and the retaining member 5 is connected to the other end of the elastic member 4 and embedded in the retaining slot 301.

[0027] In the above embodiment, the angle grinder shield mounting structure is also equipped with a ratchet seat 9, ratchet teeth 8 and a compression spring 7 when applied to the angle grinder. The ratchet seat 9 is sleeved on the bearing seat 3 and is located at the bottom of the support seat 2. The support seat 2 is provided with an axially arranged sliding groove 202. The ratchet teeth 8 are installed in the sliding groove 202. The bottom of the ratchet teeth 8 abuts against the ratchet seat 9. One end of the compression spring 7 is connected to the top of the ratchet teeth 8, and the other end abuts against the shield 1. The compression spring 7 has a tendency to drive the ratchet teeth 8 to move toward the ratchet seat 9.

[0028] In order to facilitate the assembly and disassembly of the shield 1 and the bearing seat 3, a limit block 102 protruding toward the center of the circle is provided at the mounting hole 101, a slideway 303 for inserting the limit block 102 is opened on the outer circumference of the bearing seat 3, and a notch 305 is opened on the outer circumference of the bearing seat 3, one end of the notch 305 extends to the end face of the bearing seat 3 close to the shield 1, and the other end extends to the slideway 303.

[0029] Therefore, during the relative rotation between the shield 1 and the bearing seat 3, when the limit block 102 moves to the notch 305, the shield 1 is easily ejected from the bearing seat 3 due to the presence of the compression spring 7, which requires the user to reinstall the shield 1, which is extremely inconvenient.

[0030] Based on the above problems, the angle grinder shield installation structure in one embodiment of the utility model can form a stable fixed structure through the combination of the locking member 5 and the locking slot 301, which can limit the axial separation of the shield 1 and the bearing seat 3 during the rotation of the shield 1. The elastic member 4 can provide radial movement space for the locking member 5, so that when the operator axially exerts force to pull the shield 1, the locking member 5 can be separated from the locking slot 301, without affecting the normal disassembly of the shield 1.

[0031] In one embodiment, if Figure 4 As shown, in order to reduce the difficulty of the retaining member 5 to escape from the retaining slot 301, an installation slot 302 is provided in the axial direction of the outer ring of the bearing seat 3 for the retaining member 5 to pass through and enter the retaining slot 301. The depth of the installation slot 302 is less than the depth of the retaining slot 301 and the width is greater than the width of the retaining member 5. After the installation slot 302 is provided, when the shield 1 needs to be removed, the retaining member 5 is moved to the end of the installation slot 302. When the shield 1 is pulled by axial force, the retaining member 5 can be moved out of the retaining slot 301 along the installation slot 302, thereby reducing the difficulty of removing the shield 1.

[0032] Furthermore, one end of the mounting groove 302 extends to the end surface of the bearing seat 3 close to the shield 1, and the other end extends to the positioning slide groove 301. In order to facilitate the connection between the shield 1 and the bearing seat 3, a stopper 102 protruding toward the center of the circle is provided at the mounting hole 101 of the shield 1, and a slideway 303 for inserting the stopper 102 is provided on the outer circumference of the bearing seat 3. The slideway 303 divides the mounting groove 302 into two parts, including a first mounting groove 3021 and a second mounting groove 3022. The first mounting groove 3021 is close to the shield 1, and the second mounting groove 3022 is located between the positioning slide groove 301 and the slideway 303, thereby causing the positioning member 5 to enter the slideway 303 after moving out of the second mounting groove 3022, and the positioning member 5 needs to enter the first mounting groove 3021 again to separate the shield 1 from the bearing seat 3.

[0033] Therefore, in order to further reduce the difficulty of separating the shield 1 from the bearing seat 3, guide surfaces 304 are provided at the axial ends of the first mounting groove 3021 and the second mounting groove 3022. The guide surface 304 is an inclined surface formed by the circumferential end surfaces of the first mounting groove 3021 and the second mounting groove 3022 facing the center depression of the bearing seat 3.

[0034] When assembling the support seat 2 and the bearing seat 3, the two are generally kept close together without leaving any gap. Figure 4 As shown, a receiving groove 201 is provided on the inner ring of the support seat 2, and the elastic member 4 is provided in the receiving groove 201, so that the support seat 2 and the bearing seat 3 can be kept in close contact as much as possible.

[0035] Furthermore, in order to facilitate the installation of the elastic member 4 into the receiving groove 201, one end of the receiving groove 201 extends to the end of the support seat 2 close to the protective cover 1. When installing the elastic member 4, the elastic member 4 can be directly installed into the receiving groove 201 from the top of the receiving groove 201, thereby improving the installation efficiency of the elastic member 4 and making it easy to remove the elastic member 4 when replacing it later.

[0036] In practical applications, considering the size and joint position of the support seat 2 and the bearing seat 3, the depth of the receiving groove 201 is generally greater than the length of the elastic member 4 in the axial direction of the support seat 2. Therefore, in order to limit the axial movement of the elastic member 4 in the receiving groove 201 along the support seat 2, a stopper 6 is provided in the receiving groove 201, and one end of the stopper 6 abuts against the shield 1, and the other end abuts against the elastic member 4 along the radial direction of the elastic member 4. That is, the remaining space of the receiving groove 201 is filled with the stopper 6 to limit the axial movement of the elastic member 4 along the support seat 2.

[0037] In one embodiment, in order to prevent the stopper 6 from moving in the receiving groove 201 along the radial direction of the support seat 2, the receiving groove 201 is provided with a radial opening, and the retaining member 5 partially protrudes out of the radial opening, and in the radial direction, the projection of the radial opening at least partially overlaps with the projection of the retaining member 5. Alternatively, in the radial direction, the radial opening at least partially abuts against the retaining member 5. Specifically, the horizontal cross-section of the stopper 6 can be set to be fan-shaped, and the horizontal cross-section of the contact portion of the receiving groove 201 and the stopper 6 is also set to be fan-shaped, and the dimension of the fan-shaped cross-section close to the center of the support seat 2 is smaller than the dimension away from the center of the support seat 2.

[0038] In one embodiment, since a notch 305 is provided on the outer circumference of the bearing seat 3, and one end of the notch 305 extends to the end surface of the bearing seat 3 close to the shield 1, and the other end extends to the slideway 303, the angle grinder shield installation structure has a fixed state and a disassembled state. In the fixed state, the limit block 102 is located in the slideway 303 and is offset from the notch 305. In this state, the shield 1 and the bearing seat 3 cannot be separated. In the disassembled state, the shield 1 or the bearing seat 3 is rotated so that the limit block 102 faces the notch 305 and the retaining member 5 faces the installation groove 302. In this state, the shield 1 or the bearing seat 3 is pulled by axial force, so that the shield 1 and the bearing seat 3 can be separated.

[0039] like Figure 3 As shown, the elastic member 4 may be a spring or other elastic member. The positioning member 5 may be a steel ball or a member with a smooth curved surface at the end.

[0040] like Figure 4 As shown, there are multiple elastic members 4 and clamping members 5, and each elastic member 4 and each clamping member 5 is arranged at intervals. In particular, three elastic members 4 and three clamping members 5 can be arranged respectively, and each elastic member 4 and clamping member 5 is distributed at equal intervals.

[0041] Another embodiment of the present invention further provides an angle grinder, which includes the above-mentioned angle grinder shield installation structure, a compression spring 7, ratchet teeth 8, a ratchet seat 9 and other essential parts of the angle grinder.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0043] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An angle grinder guard installation structure, characterized in that: include: A protective cover (1) having a mounting hole (101); A bearing seat (3), one end of which is detachably rotatably connected to the mounting hole (101), and a positioning slot (301) is provided on the outer circumference of the bearing seat (3); A support seat (2) connected to the shield (1) and sleeved on the bearing seat (3); An elastic member (4), one end of which is connected to the inner ring of the support seat (2); as well as The locking member (5) is connected to the other end of the elastic member (4) and is embedded in the locking slot (301).

2. The angle grinder guard installation structure according to claim 1, characterized in that: An installation groove (302) is axially provided on the outer ring of the bearing seat (3) for the retaining member (5) to pass through and enter the retaining slide groove (301).

3. The angle grinder guard installation structure according to claim 2, characterized in that: One end of the mounting groove (302) extends to the end surface of the bearing seat (3) close to the shield (1), and the other end extends to the positioning slide groove (301); a limit block (102) protruding toward the center of the circle is provided at the mounting hole (101); a slideway (303) for inserting the limit block (102) is opened on the outer circumference of the bearing seat (3); the slideway (303) divides the mounting groove (302) into a first mounting groove (3021) and a second mounting groove (3022); and guide surfaces (304) are provided at the axial ends of the first mounting groove (3021) and the second mounting groove (3022).

4. The angle grinder guard installation structure according to claim 1, characterized in that: The inner ring of the support seat (2) is provided with a receiving groove (201), and the elastic member (4) is arranged in the receiving groove (201).

5. The angle grinder guard installation structure according to claim 4, characterized in that: One end of the receiving groove (201) extends to the end of the support seat (2) close to the shield (1), and a stopper (6) is provided in the receiving groove (201), one end of the stopper (6) abuts against the shield (1), and the other end abuts against the elastic member (4) along the radial direction of the elastic member (4).

6. The angle grinder guard installation structure according to claim 5, characterized in that: The receiving groove (201) is provided with a radial opening, the retaining member (5) partially protrudes out of the radial opening, and in the radial direction, the projection of the radial opening and the projection of the retaining member (5) at least partially overlap; and / or, In the radial direction, the radial opening at least partially abuts against the locking member (5).

7. The angle grinder guard installation structure according to claim 3, characterized in that: A notch (305) is formed on the outer circumference of the bearing seat (3), one end of the notch (305) extends to the end surface of the bearing seat (3) close to the shield (1), and the other end extends to the slideway (303); The angle grinder guard installation structure has a fixed state and a disassembled state; In the fixed state, the limit block (102) is located in the slideway (303) and is offset from the notch (305); In the disassembled state, the limiting block (102) faces the notch (305), and the locking member (5) faces the installation slot (302).

8. The angle grinder guard installation structure according to claim 1, characterized in that: The elastic member (4) is a spring, and the locking member (5) is a steel ball.

9. The angle grinder guard installation structure according to claim 1, characterized in that: A plurality of the elastic members (4) and the retaining members (5) are provided, and each of the elastic members (4) and each of the retaining members (5) are arranged at intervals.

10. An angle grinder, characterized in that: It comprises the angle grinder guard mounting structure as claimed in any one of claims 1 to 9.

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