Angle grinder self-locking structure

Abstract

The utility model discloses a kind of angle grinder self-locking structures, including the self-locking pin for being installed on angle grinder head shell and being used to carry out self-locking to big gear, the recess is equipped at the upper surface of angle grinder head shell opposite self-locking pin, positioning groove is equipped on the inner wall surface of recess, one end of self-locking pin extends into positioning groove, and positioning seat is installed, one end of positioning seat extends into recess through positioning groove and is set, positioning channel is equipped on positioning seat, and positioning rod for limiting positioning seat is equipped in positioning channel. The utility model is simple in structure, when positioning rod is in first section, avoid the self-locking pin from appearing up and down swing in the process of working due to the reason of reset spring, and positioning rod can be moved towards third section by holding rod, by extrusion between positioning rod and second section, positioning seat and self-locking pin can be lowered, to complete self-locking operation, so that worker can disassemble and assemble abrasive disc with both hands, increase convenience and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of angle grinder technology, and specifically to a self-locking structure for an angle grinder. Background Technology

[0002] An angle grinder is a handheld electric (or pneumatic) grinding / cutting tool, mainly used for cutting, grinding, polishing, and rust removal of materials such as metal, stone, and wood.

[0003] Currently, patent CN 208304787 U discloses a self-locking structure for an angle grinder, including an aluminum head shell, a self-locking hole provided on the aluminum head shell, a self-locking pin installed at the self-locking hole, a large gear that cooperates with the self-locking pin, an output shaft that installs the large gear, and a grinding wheel installed at the end of the output shaft.

[0004] However, the aforementioned patent requires the self-locking cap to be continuously pressed during self-locking, which means that one hand can only hold the angle grinder, and the grinding wheel can only be replaced with the other hand, thus affecting the disassembly and assembly efficiency. Furthermore, since the self-locking pin returns to its original position through the return spring, the elasticity of the return spring during operation can cause the self-locking pin to move up and down, which may cause the self-locking pin to collide with the large gear, affecting the safety of use. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a self-locking structure for an angle grinder, which can press down and position the positioning seat after the positioning rod is pushed, without the need for continuous pressing, so as to solve the problem mentioned in the background art.

[0006] This utility model is achieved through the following technical solution: a self-locking structure for an angle grinder, including a self-locking pin installed on the angle grinder head shell for self-locking a large gear. The upper surface of the angle grinder head shell has a groove opposite to the self-locking pin. A positioning groove is provided on the inner wall of the groove. One end of the self-locking pin extends into the positioning groove and is fitted with a positioning seat. One end of the positioning seat extends through the positioning groove into the groove. The positioning seat has a positioning channel, and a positioning rod that limits the positioning seat is provided in the positioning channel. One end of the positioning rod is slidably connected to the angle grinder head shell, and the other end is fitted with a locking mechanism for positioning the positioning rod.

[0007] As a preferred technical solution, a groove is provided on the side of the groove away from the opening, and a slider is installed at one end of the positioning rod. The slider is slidably disposed in the groove, and the cross-sections of both the slider and the groove are trapezoidal.

[0008] The self-locking structure of the angle grinder is characterized in that: the locking mechanism includes a grip rod, a limiting ring, and a compression spring. The limiting ring is installed at one end of the grip rod. A plurality of arc-shaped limiting grooves are provided on one side of the angle grinder head shell. The other end of the limiting ring is inserted into the corresponding limiting groove. A positioning hole is provided in the center of the side of the grip rod facing the limiting ring. The other end of the positioning rod is inserted into the positioning hole and fixedly connected to the compression spring. The other end of the compression spring is installed on the inner wall of the positioning hole.

[0009] As a preferred technical solution, the positioning channel includes a first segment, a second segment, and a third segment. The first segment and the third segment are arranged parallel to each other, one above the other. The second segment is arranged at an angle and connects the first segment and the third segment. The positioning rod is set in the first segment, and the third segment has an arc-shaped slot.

[0010] As a preferred technical solution, a space is formed between the bottom surface of the positioning seat and the positioning groove for the positioning seat to descend and press down the self-locking pin.

[0011] As a preferred technical solution, the diameter of the positioning seat matches the inner diameter of the positioning groove.

[0012] As a preferred technical solution, both the positioning rod and the slider are made of metal.

[0013] The beneficial effects of this utility model are as follows: This utility model has a simple structure. When the positioning rod is in the first section, it can position the positioning seat and the self-locking pin, avoiding the self-locking pin from swinging up and down due to the return spring during the operation. By holding the rod, the positioning rod can be moved towards the third section. Through the compression between the positioning rod and the second section, the positioning seat and the self-locking pin can be lowered to complete the self-locking operation. The positioning rod and the limiting ring can position the self-locking pin after it is pressed down, eliminating the need for continuous pressing. This allows the operator to disassemble and assemble the grinding wheel with both hands, increasing convenience and efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model after the locking mechanism has been removed;

[0017] Figure 3 This is a schematic diagram of the structure of this utility model after removing the positioning seat;

[0018] Figure 4 This is a schematic diagram of the positioning seat of this utility model;

[0019] Figure 5 This is a distribution diagram of the grooves of this utility model.

[0020] The components include: 1. Angle grinder head housing; 2. Groove; 3. Positioning seat; 4. Positioning channel; 5. Limiting groove; 6. Handle; 7. Limiting ring; 8. Positioning rod; 9. Compression spring; 10. Slider; 11. Positioning groove; 12. Self-locking pin; 13. Second section; 14. First section; 15. Third section; 16. Slot; 17. Slide groove. Detailed Implementation

[0021] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0022] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0023] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present invention discloses a self-locking structure for an angle grinder, including a self-locking pin 12 installed on the angle grinder head shell 1 for self-locking the large gear. The upper surface of the angle grinder head shell 1 has a groove 2 opposite to the self-locking pin 12. The inner wall of the groove 2 has a positioning groove 11. One end of the self-locking pin 12 extends into the positioning groove 11 and is fitted with a positioning seat 3. One end of the positioning seat 3 extends through the positioning groove 11 into the groove 2. The positioning seat 3 has a positioning channel 4. The positioning channel 4 has a positioning rod 8 that limits the positioning seat 3. One end of the positioning rod 8 is slidably connected to the angle grinder head shell 1, and the other end is fitted with a locking mechanism for positioning the positioning rod 8.

[0025] In this embodiment, a sliding groove 17 is provided on the side of the groove 2 away from the opening. A slider 10 is installed at one end of the positioning rod 8. The slider 10 is slidably disposed in the sliding groove 17. The cross sections of both the slider 10 and the sliding groove 17 are trapezoidal. The positioning rod can be positioned by the slider and the sliding groove, so that the positioning rod can only move back and forth along the sliding groove.

[0026] In this embodiment, the locking mechanism includes a grip rod 6, a limiting ring 7, and a compression spring 9. The limiting ring 7 is installed at one end of the grip rod 6. A plurality of arc-shaped limiting grooves 5 are provided on one side surface of the angle grinder head housing 1. The other end of the limiting ring 7 is inserted into the corresponding limiting groove 5. A positioning hole is provided in the center of the side surface of the grip rod 6 facing the limiting ring 7. The other end of the positioning rod 8 is inserted into the positioning hole and fixedly connected to the compression spring 9. The other end of the compression spring 9 is installed on the inner wall surface of the positioning hole.

[0027] In this embodiment, the positioning channel 4 includes a first segment 14, a second segment 13, and a third segment 15. The first segment 14 and the third segment 15 are arranged parallel to each other, one above the other. The second segment 13 is arranged at an angle and connects the first segment 14 and the third segment 15. The positioning rod 8 is disposed in the first segment 14. The third segment 15 is provided with an arc-shaped slot 16. After the positioning rod enters the third segment, it can be engaged and positioned by the slot, thus pre-positioning the positioning rod after it enters.

[0028] In this embodiment, a space is formed between the bottom surface of the positioning seat 3 and the positioning groove 11 for the positioning seat 3 to descend and press down the self-locking pin 12.

[0029] In this embodiment, the diameter of the positioning seat 3 matches the inner diameter of the positioning groove 11, so that the positioning seat can descend stably along the positioning groove and avoid swaying.

[0030] In this embodiment, both the positioning rod 8 and the slider 10 are made of metal, which increases their robustness and service life.

[0031] When the grinding wheel is not changed, the positioning rod is set in the first section. The positioning rod can position the fixed seat up and down. The positioning of the fixed seat restricts the self-locking pin. When the angle grinder is working, the vibration generated cannot cause the self-locking pin to swing up and down, and also avoids collision with the large gear, thus increasing safety. The positioning rod is positioned by the insertion between the limit ring and the positioning groove.

[0032] When changing the grinding wheel, pull the lever outward. After the limiting ring disengages from the limiting groove on one side, the lever can be pushed laterally. The movement of the lever drives the positioning rod, causing it to move stably along the slide groove. The moving positioning rod can press the second section, causing the positioning seat to descend until the positioning rod enters the third section. The movement of the positioning seat drives the self-locking pin until it inserts into the self-locking groove of the large gear. The entered positioning rod can engage with the slot. After releasing the lever, the return energy of the compression spring pushes the lever, which in turn drives the limiting ring, causing it to insert into another limiting groove, thus repositioning the positioning rod itself. This allows the operator to disassemble and assemble the grinding wheel with both hands, increasing convenience and efficiency.

[0033] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A self-locking structure for an angle grinder, characterized in that: Includes a self-locking pin (12) installed on the angle grinder head housing (1) for self-locking the large gear. The upper surface of the angle grinder head housing (1) is provided with a groove (2) opposite to the self-locking pin (12). The inner wall of the groove (2) is provided with a positioning groove (11). One end of the self-locking pin (12) extends into the positioning groove (11) and is provided with a positioning seat (3). One end of the positioning seat (3) extends through the positioning groove (11) into the groove (2). The positioning seat (3) is provided with a positioning channel (4). The positioning channel (4) is provided with a positioning rod (8) that limits the positioning seat (3). One end of the positioning rod (8) is slidably connected to the angle grinder head housing (1), and the other end is provided with a locking mechanism that positions the positioning rod (8).

2. The angle grinder self-locking structure according to claim 1, characterized in that: The groove (2) has a sliding groove (17) on the side away from the opening. A slider (10) is installed at one end of the positioning rod (8). The slider (10) is slidably disposed in the sliding groove (17). The cross sections of the slider (10) and the sliding groove (17) are both trapezoidal.

3. The angle grinder self-locking structure according to claim 1, characterized in that: The locking mechanism includes a grip (6), a limiting ring (7), and a compression spring (9). The limiting ring (7) is installed at one end of the grip (6). A plurality of arc-shaped limiting grooves (5) are provided on one side of the angle grinder head housing (1). The other end of the limiting ring (7) is inserted into the corresponding limiting groove (5). A positioning hole is provided in the center of the side of the grip (6) facing the limiting ring (7). The other end of the positioning rod (8) is inserted into the positioning hole and fixedly connected to the compression spring (9). The other end of the compression spring (9) is installed on the inner wall of the positioning hole.

4. The angle grinder self-locking structure according to claim 1, characterized in that: The positioning channel (4) includes a first section (14), a second section (13) and a third section (15). The first section (14) and the third section (15) are arranged in parallel, one above the other. The second section (13) is arranged at an angle and connects the first section (14) and the third section (15). The positioning rod (8) is set in the first section (14). The third section (15) is provided with an arc-shaped slot (16).

5. The angle grinder self-locking structure according to claim 1, characterized in that: The bottom surface of the positioning seat (3) and the positioning groove (11) form a space for the positioning seat (3) to descend and press down the self-locking pin (12).

6. The angle grinder self-locking structure according to claim 1, characterized in that: The diameter of the positioning seat (3) matches the inner diameter of the positioning groove (11).

7. The angle grinder self-locking structure according to claim 2, characterized in that: Both the positioning rod (8) and the slider (10) are made of metal.

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