Grinding wheel guard mechanism and angle grinder

Abstract

The utility model provides a grinding wheel cover mechanism which comprises a basic component and a grinding wheel cover. One of the grinding wheel cover and the basic component is provided with a first locking matching surface, and the other one of the grinding wheel cover and the basic component is provided with a second locking matching surface; the first locking matching surface is provided with at least two gear locking grooves; the second locking matching surface is provided with an elastic locking structure, the elastic locking structure is provided with a locking clamping part, and when the locking clamping part is separated from the gear locking groove, the elastic locking structure has the trend that the locking clamping part moves towards the first locking matching surface so as to be clamped into the gear locking groove; and an unlocking guide surface for guiding the locking clamping part to be separated from the gear locking groove is arranged on the gear locking groove and / or the elastic locking structure. According to the grinding wheel cover mechanism, a user can conveniently adjust the angle of the grinding wheel cover, and the working efficiency and experience of the user are improved. The utility model further provides the angle grinder.

Description

Technical Field

[0001] The utility model relates to the field of grinding wheel covers, in particular to a grinding wheel cover mechanism and an angle grinder. Background Art

[0002] An angle grinder utilizes a high-speed, thin-blade grinding wheel to grind and cut metal components and other materials, presenting certain safety hazards during use. Therefore, installing a protective grinding wheel guard on the angle grinder can effectively prevent sparks from cutting, as well as the risk of the grinding wheel breaking and flying due to improper use, which could harm the user. Currently, angle grinder wheel guards are primarily secured with a locking wrench. When the user needs to change the cutting angle while using the angle grinder, they must adjust the wheel guard angle in three steps: 1. Loosen the locking wrench; 2. Rotate the guard; 3. Tighten the locking wrench. To ensure the stability of the wheel guard lock, the locking wrench is a tight fit, requiring considerable force to loosen and tighten. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the present invention provides a grinding wheel cover mechanism that, through the cooperation of a gear locking groove and an elastic locking structure, allows the user to more conveniently adjust the angle of the grinding wheel cover, greatly improving the user's work efficiency and user experience. The present invention also provides an angle grinder.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A grinding wheel cover mechanism comprises a base component and a grinding wheel cover having a protective cavity and capable of covering a grinding wheel; the grinding wheel cover is rotatably arranged on the base component;

[0006] One of the grinding wheel cover and the base component is provided with a first locking mating surface, and the other of the grinding wheel cover and the base component is provided with a second locking mating surface, and the first locking mating surface and the second locking mating surface are arranged opposite to each other;

[0007] The first locking mating surface is provided with at least two gear locking grooves, and the plurality of gear locking grooves are arranged at intervals around the rotation axis of the grinding wheel cover;

[0008] The second locking mating surface is provided with an elastic locking structure, and a locking engaging portion capable of engaging with the shift locking groove is provided on a side of the elastic locking structure facing the first locking mating surface, and the elastic locking structure has a tendency to cause the locking engaging portion to move toward the first locking mating surface side to engage with the shift locking groove when the locking engaging portion is separated from the shift locking groove;

[0009] The gear locking groove and / or the elastic locking structure are provided with an unlocking guide surface for guiding the locking engaging portion to move toward the second locking mating surface side to separate from the gear locking groove when the grinding wheel cover rotates relative to the base component.

[0010] With the above structure, when the locking engaging portion of the elastic locking structure is engaged with the gear locking groove, the grinding wheel cover is restricted from rotating relative to the base component, thereby locking the two components, thereby ensuring that the angle of the grinding wheel cover is maintained during use by the user;

[0011] When the user needs to adjust the angle of the grinding wheel cover, the user can also quickly rotate the grinding wheel cover to adjust the angle of the grinding wheel cover. Specifically, when the user needs to adjust the grinding wheel cover, he only needs to apply a certain operating force to the grinding wheel cover to rotate the grinding wheel cover. During the rotation of the grinding wheel cover, the locking engaging portion of the elastic locking structure will move toward the second locking matching surface under the guidance of the unlocking guide surface to achieve separation and unlocking from the current gear locking groove. The user continues to rotate the grinding wheel cover, and the locking engaging portion of the elastic locking structure will be opposite to the next gear locking groove. At this time, due to the characteristics of the elastic locking structure, the locking engaging portion moves toward the first locking matching surface to be engaged with the gear locking groove. The grinding wheel cover is again restricted from rotating relative to the base component to achieve locking of the two. When the locking engaging portion is engaged with the gear locking groove, a sound is emitted to alert the user. If the current angle of the grinding wheel cover is still not the user's target angle, the user only needs to continue to rotate the grinding wheel cover to adjust it to the desired angle gear. Of course, the same applies to the rotation adjustment in the opposite direction.

[0012] Specifically, when the grinding wheel cover is arranged on the grinding wheel, the rotation axis of the grinding wheel cover is collinear with the rotation axis of the grinding wheel to ensure that the mechanism is used normally;

[0013] The above structure is reasonably designed and easy to operate, which greatly improves the user's work efficiency and usage experience; the mechanism is suitable for all types of products that use grinding wheels for grinding and cutting, including but not limited to angle grinders.

[0014] Furthermore, the basic component includes a grinding wheel cover mounting shaft for mounting the grinding wheel cover, and correspondingly, the grinding wheel cover includes a grinding wheel cover mounting shaft sleeve that matches the grinding wheel cover mounting shaft and can be sleeved on the grinding wheel cover mounting shaft;

[0015] The outer side wall of the grinding wheel cover mounting shaft toward the grinding wheel cover mounting sleeve is formed as the second locking fitting surface; correspondingly, the inner side wall of the grinding wheel cover mounting sleeve toward the grinding wheel cover mounting shaft is formed as the first locking fitting surface.

[0016] The above structure makes the structure of the basic component and the grinding wheel cover more reasonable, and the grinding wheel cover mounting sleeve is sleeved on the grinding wheel cover mounting shaft to realize the rotational installation of the grinding wheel cover; and the above structure makes the setting of the first locking mating surface and the second locking mating surface more reasonable, which is convenient for the setting of the gear locking groove and the elastic locking structure during production.

[0017] Furthermore, in a state where the locking engaging portion is engaged with the shift locking groove, as the grinding wheel cover rotates, the locking engaging portion is configured as the unlocking guide surface at least where it contacts the shift locking groove in the rotation direction of the grinding wheel cover, and / or the shift locking groove is configured as the unlocking guide surface at least where it contacts the locking engaging portion in the rotation direction of the grinding wheel cover;

[0018] Specifically, the unlocking guide surface is configured as an inclined surface or an arcuate surface; preferably, the locking engaging portion is provided with the unlocking guide surface, and the unlocking guide surface on the locking engaging portion is configured as an arcuate surface.

[0019] With the above structure, when the locking engagement part is engaged in the gear locking groove, when the user rotates the grinding wheel cover, the locking engagement part will contact the gear locking groove. Since one of the two is configured as the unlocking guide surface at the contact point, and the unlocking guide surface is configured as a slope or an arc surface, when the user continues to rotate the grinding wheel cover, the locking engagement part can be guided to move toward the second locking mating surface side to separate from the current gear locking groove; the above structure is reasonably set up.

[0020] Furthermore, the elastic locking structure includes a gear locking piece and a gear locking elastic piece, and the gear locking piece is configured to be able to engage with the gear locking groove to form the locking engaging portion; the gear locking elastic piece acts on the gear locking piece so that it has a tendency to move the locking engaging portion toward the first locking mating surface side to engage with the gear locking groove when it is separated from the gear locking groove.

[0021] The above structure makes the elastic locking structure more reasonable to realize its function; specifically, when the gear locking member moves in the direction of separation from the gear locking groove, it will act on the gear locking elastic member to cause it to deform, and the gear locking elastic member will act in the opposite direction on the gear locking member due to the deformation, so that the gear locking elastic member has a tendency to make the locking engaging portion move toward the first locking mating surface side to be engaged in the gear locking groove.

[0022] Furthermore, the shift locking elastic member is located between the shift locking member and the second locking mating surface, and two ends of the shift locking elastic member act on the shift locking member and the second locking mating surface respectively;

[0023] Specifically, the gear locking elastic member is a spring.

[0024] The above structure makes the setting of the gear locking elastic member more reasonable, so that it can be deformed when the gear locking member moves in the direction of separation from the gear locking groove, and acts on the gear locking member to have a tendency to make the locking engaging part move toward the side of the first locking mating surface to be engaged in the gear locking groove.

[0025] Furthermore, the elastic locking structure includes a gear locking housing, the gear locking housing is provided with a gear accommodating groove that matches the gear locking piece and provides a movable space for the gear locking piece, and the accommodating groove opening of the gear locking piece accommodating groove is arranged toward the first locking mating surface, the gear locking elastic piece is arranged between the accommodating groove bottom of the gear locking piece accommodating groove and the gear locking piece, and two ends of the locking elastic piece are respectively in contact with the accommodating groove bottom and the gear locking piece so that the gear locking piece, in a natural state, extends out of the accommodating groove opening on a side away from the accommodating groove bottom;

[0026] One end of the locking elastic member abuts against the gear locking member to act on the gear locking member, and the gear locking shell is arranged on the second locking mating surface. The other end of the locking elastic member abuts against the bottom of the accommodating groove to act on the gear locking shell and indirectly act on the second locking mating surface.

[0027] The above structure makes the elastic locking structure more reasonable; the setting of the shift member accommodating groove can not only guide the movement of the shift locking member, but also prevent the shift locking elastic from being twisted during the deformation process. The above structure makes the elastic locking structure more stable and reliable during use;

[0028] Furthermore, due to the arrangement of the gear locking housing, an environment is provided for the installation of the gear locking member and the gear locking elastic member, and the elastic locking structure is formed into a whole, which facilitates the installation of the elastic locking structure onto the second locking mating surface.

[0029] Furthermore, the gear locking member is in a spherical structure to form the unlocking guide surface.

[0030] The above structure makes the gear locking piece more reasonable. The spherical gear locking piece can not only move in the gear locking housing, but also its surface is naturally formed into the unlocking guide surface, which simplifies its structure while meeting the function of the gear locking piece.

[0031] Furthermore, a locking member limiting structure for limiting the shift locking member from being separated from the shift member accommodating groove is provided on the shift member accommodating groove.

[0032] The above structure makes the structure of the gear locking housing more reasonable, and the locking member limiting structure can limit the gear locking member in the gear member accommodating groove, so as to facilitate the installation of the elastic locking structure as a whole.

[0033] Furthermore, the opening diameter of the accommodating groove is smaller than the diameter of the gear locking member to form a locking member limiting structure;

[0034] Specifically, along the direction from the bottom of the accommodating groove to the opening of the accommodating groove, the inner diameter of the shifting member accommodating groove close to the opening of the accommodating groove gradually decreases.

[0035] The above structure makes the formation of the locking member limiting structure more reasonable, and the overall structure of the gear locking housing is not complicated, which is convenient for production and installation.

[0036] The inner diameter of the shift member receiving groove gradually decreases near the receiving groove opening so that this portion can be adapted to the shift locking member with a spherical structure, so that the end of the shift locking member can extend out of the receiving groove opening.

[0037] Furthermore, a locking structure installation groove for installing the elastic locking structure is provided on the second locking mating surface.

[0038] With the above structure, the arrangement of the locking structure mounting groove facilitates the installation and fixation of the elastic locking structure; specifically, the locking structure mounting groove is adapted to the gear locking housing.

[0039] Furthermore, the elastic locking structure is provided in plurality, and the plurality of elastic locking structures are arranged at intervals around the rotation axis of the grinding wheel cover;

[0040] The first locking mating surface is provided with at least two groups of gear locking groove groups, each group of the gear locking groove groups includes gear locking grooves whose number matches the number of the elastic locking structures, and when one of the elastic locking structures is engaged with one of the gear locking grooves in the group of the gear locking groove groups, the remaining elastic locking structures are engaged one-to-one with the remaining gear locking grooves in the group of the gear locking groove groups.

[0041] With the above structure, a plurality of elastic locking structures are provided, and each elastic locking structure has a gear locking groove that cooperates with it in a group of gear locking grooves, so that when the elastic locking structure and the gear locking groove are engaged with each other, the restriction on the relative rotation of the grinding wheel cover and the base component is more reliable.

[0042] Furthermore, a plurality of the elastic locking structures are arranged at equal intervals around the rotation axis of the grinding wheel cover; and a plurality of the gear locking grooves are arranged at equal intervals around the rotation axis of the grinding wheel cover.

[0043] The above structure makes the arrangement of the elastic locking structure and the gear locking groove more reasonable.

[0044] Furthermore, a mounting mating protrusion is provided on the inner side wall of the grinding wheel cover mounting sleeve facing the grinding wheel cover mounting shaft on a radial protrusion; correspondingly, a mounting mating groove matching the mounting mating protrusion is provided at a corresponding position on the outer side wall of the grinding wheel cover mounting sleeve facing the grinding wheel cover mounting shaft, and the mounting mating groove extends along the rotation direction of the grinding wheel cover.

[0045] With the above structure, when the grinding wheel cover is installed on the base component, the grinding wheel cover mounting sleeve is sleeved on the grinding wheel cover mounting shaft. At this time, the mounting mating protrusion will be stuck in the mounting mating groove. Since the mounting mating groove extends along the rotation direction of the grinding wheel cover, the two sides of the mounting mating groove will limit the movement of the mounting mating protrusion in the axis direction of the grinding wheel cover mounting sleeve, that is, limit the axial movement of the grinding wheel cover mounting sleeve relative to the grinding wheel cover mounting shaft, thereby avoiding the grinding wheel cover from accidentally detaching from the base component; and the mounting mating groove can guide the sliding of the mounting mating protrusion in the rotation direction of the grinding wheel cover, thereby making the rotation of the grinding wheel cover relative to the base component more stable.

[0046] Furthermore, during the process of installing the grinding wheel cover to the base component, the installation fitting groove provided on the outer side wall of the grinding wheel cover mounting shaft will take precedence over the elastic locking structure and be opposite to the inner side wall of the grinding wheel cover mounting sleeve; the gear locking groove provided on the inner side wall of the grinding wheel cover mounting sleeve will take precedence over the installation fitting protrusion and be opposite to the outer side wall of the grinding wheel cover mounting shaft.

[0047] The above structure makes the arrangement of the mounting fitting groove and the mounting fitting protrusion more reasonable, thereby avoiding the influence on the arrangement of the elastic locking structure and the gear locking groove.

[0048] Furthermore, a mounting avoidance opening matching the mounting matching protrusion is provided on a side wall of the mounting matching groove away from the elastic locking structure, and the mounting avoidance opening is extended along the disassembly and assembly direction of the grinding wheel cover toward the side away from the elastic locking structure.

[0049] With the above structure, the setting of the installation avoidance opening facilitates the installation matching protrusion to enter and exit the installation matching groove, thereby facilitating the disassembly and assembly between the grinding wheel cover and the basic component; specifically, during installation, the installation matching protrusion is aligned with the installation avoidance opening, and at this time, the grinding wheel mounting sleeve can be easily sleeved on the grinding wheel mounting shaft along its installation direction; during disassembly, the grinding wheel cover is rotated so that the installation matching protrusion is aligned with the installation avoidance opening, and at this time, the grinding wheel mounting sleeve can be easily removed from the grinding wheel mounting shaft along its disassembly direction.

[0050] Furthermore, when the grinding wheel cover is rotated and arranged on the base component, when the grinding wheel cover is rotated until the mounting mating protrusion is opposite to the corresponding mounting mating groove, the locking engaging portion of the elastic locking structure is engaged in the gear locking groove.

[0051] By adopting the above structure, when the grinding wheel cover is rotated so that the installation mating protrusion is aligned with the installation avoidance opening, the locking clamping part of the elastic locking structure is clamped into the gear locking groove, and the elastic locking structure and the gear locking groove cooperate with each other to limit the axial movement of the grinding wheel cover relative to the base component, thereby preventing the grinding wheel cover from being removed from the base component when the grinding wheel cover is adjusted; if the user needs to remove the grinding wheel cover, it is only necessary to disengage the locking clamping part from the gear locking groove.

[0052] Furthermore, there are multiple mounting mating protrusions, and multiple mounting mating protrusions are arranged around the axis of the grinding wheel cover mounting shaft; correspondingly, the number of mounting mating grooves is matched with the mounting mating protrusions, and multiple mounting mating grooves are arranged around the axis of the grinding wheel cover mounting sleeve, and the setting positions of the multiple mounting mating grooves correspond one-to-one to the setting positions of the multiple mounting mating protrusions.

[0053] With the above structure, a plurality of the mounting and fitting protrusions are provided, so that the fitting between the mounting and fitting protrusions and the mounting and fitting grooves is more stable and reliable.

[0054] Furthermore, during the process of installing the grinding wheel cover to the base component, a mounting guide surface is provided at a location where the locking engaging portion first contacts the grinding wheel cover mounting sleeve and / or at a location where the grinding wheel cover mounting sleeve first contacts the locking engaging portion, and the mounting guide surface is used to guide the locking engaging portion to move toward the second locking mating surface when the grinding wheel cover is installed to the base component;

[0055] During the process of disassembling the grinding wheel cover from the base component, a disassembly guide surface is provided at the point where the locking engaging portion first contacts the gear locking groove and / or at the point where the gear locking groove first contacts the locking engaging portion, and the disassembly guide surface is used to guide the locking engaging portion to move toward the second locking mating surface when the grinding wheel cover is disassembled from the base component;

[0056] Specifically, the installation guide surface is configured as an inclined surface or an arc surface; the disassembly guide surface is configured as an inclined surface or an arc surface; preferably, the locking engaging portion first contacts the grinding wheel mounting sleeve and is configured as the installation guide surface, and the locking engaging portion first contacts the gear locking groove and is configured as the disassembly guide surface, and the locking engaging portion has a spherical structure to form the installation guide surface and the disassembly guide surface.

[0057] With the above structure, the installation guide surface and the disassembly guide surface are provided to facilitate the installation and disassembly of the grinding wheel cover;

[0058] During installation, due to the arrangement of the installation guide surface, after the grinding wheel mounting cover sleeve contacts the locking engaging portion, it will act on the locking engaging portion to move toward the second locking mating surface side, so as to facilitate further sleeve engagement of the grinding wheel mounting cover sleeve, until the gear locking groove on the grinding wheel mounting cover sleeve is opposite to the locking engaging portion, and the locking engaging portion moves toward the side where it is engaged with the gear locking groove to engage with the gear locking groove to complete the installation;

[0059] During disassembly, the user rotates the grinding wheel cover until the mounting mating protrusion is opposite to the mounting mating groove, and disassembles along the disassembly direction of the grinding wheel cover. Due to the provision of the disassembly guide surface, the locking engaging portion contacts the gear locking groove and guides the locking engaging portion to move toward the second locking mating surface side to separate from the gear locking groove, thereby facilitating the disassembly of the grinding wheel cover.

[0060] The above structure is reasonably arranged and convenient for users to use and operate.

[0061] Furthermore, a drive shaft avoidance hole for avoiding the grinding wheel drive shaft is provided at the axial position of the grinding wheel cover mounting shaft.

[0062] The above structure makes the mechanism components more reasonable. Specifically, the basic component is the upper end cover structure of the electric tool.

[0063] An angle grinder comprises the above-mentioned grinding wheel cover mechanism.

[0064] The above structure enables the user to adjust the angle of the grinding wheel cover more conveniently, thereby greatly improving the user's work efficiency and usage experience.

[0065] Compared with the prior art, the present invention has the following beneficial effects:

[0066] (1) The grinding wheel cover mechanism and angle grinder of the present invention enable users to adjust the angle of the grinding wheel cover more conveniently through the cooperation of the gear locking groove and the elastic locking structure, thereby greatly improving the user's work efficiency and usage experience.

[0067] (2) The grinding wheel cover and angle grinder of the present invention are reasonably designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0069] Figure 1 This is a schematic diagram of the three-dimensional structure of the grinding wheel cover mechanism of the utility model;

[0070] Figure 2 This is a schematic diagram of the explosion structure of the grinding wheel cover mechanism of the utility model;

[0071] Figure 3 This is a schematic diagram of the matching structure of the elastic locking structure and the gear locking groove in the grinding wheel cover mechanism of the present utility model;

[0072] Figure 4 This is a schematic cross-sectional view of the elastic locking structure in the grinding wheel cover mechanism of the present invention;

[0073] Figure 5 This is a schematic diagram of the three-dimensional structure of the angle grinder of the utility model;

[0074] The names of the components corresponding to the various figure marks in the figure are: 1. Basic component; 101. Grinding wheel cover mounting shaft; 102. Drive shaft avoidance hole; 2. Grinding wheel cover 201. Protective cavity; 202. Grinding wheel cover mounting sleeve; 3. First locking mating surface; 4. Second locking mating surface; 401. Locking structure mounting groove; 5. Gear locking groove; 6. Elastic locking structure; 601. Locking engagement portion; 602. Gear locking member; 603. Gear locking elastic member; 604. Gear locking shell; 6041. Gear member accommodating groove; 6041a. Accommodating groove opening; 6041b. Accommodating groove bottom; 6041c. Locking member limiting structure; 7. Unlocking guide surface; 8. Gear locking groove group; 9. Installation mating protrusion; 10. Installation mating groove; 1001. Installation avoidance opening; 11. Installation guide surface; 12. Disassembly guide surface; 100. Grinding wheel. DETAILED DESCRIPTION

[0075] The present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0076] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0077] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0078] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0079] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0080] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0081] The following describes the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0082] See Figures 1 to 5 The present invention provides a grinding wheel cover mechanism, comprising a base component 1 and a grinding wheel cover 100 having a protective cavity capable of covering the grinding wheel 100; the grinding wheel cover 100 is rotatably arranged on the base component 1;

[0083] One of the grinding wheel cover 100 and the base component 1 is provided with a first locking mating surface 3, and the other of the grinding wheel cover 100 and the base component 1 is provided with a second locking mating surface 4, and the first locking mating surface 3 and the second locking mating surface 4 are arranged opposite to each other;

[0084] The first locking mating surface 3 is provided with at least two gear locking grooves 5, and the plurality of gear locking grooves 5 are spaced around the rotation axis of the grinding wheel cover 100;

[0085] The second locking mating surface 4 is provided with an elastic locking structure 6. A locking engaging portion 601 capable of engaging with the shift locking groove 5 is provided on the side of the elastic locking structure 6 facing the first locking mating surface 3. When the locking engaging portion 601 is separated from the shift locking groove 5, the elastic locking structure 6 has a tendency to move the locking engaging portion 601 toward the first locking mating surface 3 to engage with the shift locking groove 5.

[0086] The gear locking groove 5 and / or the elastic locking structure 6 are provided with an unlocking guide surface 7 that guides the locking engaging portion 601 to move toward the second locking mating surface 4 to separate from the gear locking groove 5 when the grinding wheel 100 cover rotates relative to the base component 1.

[0087] With the above structure, when the locking engaging portion 601 of the elastic locking structure 6 is engaged with the gear locking groove 5, the grinding wheel cover 100 is restricted from rotating relative to the base component 1, thereby locking the two together, thereby ensuring that the angle of the grinding wheel cover 100 is maintained during use by the user;

[0088] When the user needs to adjust the angle of the grinding wheel cover 100, the user can also quickly rotate the grinding wheel cover 100 to adjust the angle of the grinding wheel cover 100; specifically, when the user needs to adjust the grinding wheel cover 100, it only needs to apply a certain operating force to the grinding wheel cover 100 to rotate the grinding wheel cover 100. In the process of rotating the grinding wheel cover 100, the locking engaging portion 601 of the elastic locking structure 6 will move toward the side of the second locking matching surface 4 under the guidance of the unlocking guide surface 7 to achieve separation and unlocking from the current gear locking groove 5; the user continues to rotate the grinding wheel cover 100, and the elastic locking structure 6 is The locking engaging portion 601 will be opposite to the next gear locking groove 5. At this time, due to the characteristics of the elastic locking structure 6, the locking engaging portion 601 moves toward the first locking mating surface 3 to be locked in the gear locking groove 5. The grinding wheel cover 100 is again restricted from rotating relative to the base component 1 to achieve locking of the two. When the locking engaging portion 601 is locked in the gear locking groove 5, a sound is emitted to remind the user. If the current angle of the grinding wheel cover 100 is still not the user's target angle, the user only needs to continue to rotate the grinding wheel cover 100 to adjust it to the required angle gear. Of course, the same principle applies to the rotation adjustment in the opposite direction.

[0089] Specifically, when the grinding wheel 100 cover is mounted on the grinding wheel 100 , the rotation axis of the grinding wheel 100 cover is collinear with the rotation axis of the grinding wheel 100 to ensure that the mechanism is used normally;

[0090] The above structure is rationally designed and easy to operate, which greatly improves the user's work efficiency and usage experience; the mechanism is suitable for various products that use the grinding wheel 100 for grinding and cutting, including but not limited to angle grinders.

[0091] Furthermore, the base component 1 includes a grinding wheel cover mounting shaft 101 for mounting the grinding wheel cover 100. Correspondingly, the grinding wheel cover 100 includes a grinding wheel cover mounting sleeve 202 that matches the grinding wheel cover mounting shaft 101 and can be sleeved on the grinding wheel cover mounting shaft 101.

[0092] The outer side wall of the grinding wheel cover mounting shaft 101 facing the grinding wheel cover mounting shaft 101 sleeve is formed as the second locking fitting surface 4; correspondingly, the inner side wall of the grinding wheel cover mounting shaft 101 sleeve facing the grinding wheel cover mounting shaft 101 is formed as the first locking fitting surface 3.

[0093] The above structure makes the structure of the basic component 1 and the grinding wheel cover 100 more reasonable, and the grinding wheel cover mounting sleeve 202 is sleeved on the grinding wheel cover mounting shaft 101 to realize the rotational installation of the grinding wheel cover 100; and the above structure makes the setting of the first locking mating surface 3 and the second locking mating surface 4 more reasonable, which is convenient for the setting of the gear locking groove 5 and the elastic locking structure 6 during production.

[0094] Furthermore, when the locking engaging portion 601 is engaged with the gear locking groove 5, as the grinding wheel cover 100 rotates, at least the portion where the locking engaging portion 601 contacts the gear locking groove 5 in the rotation direction of the grinding wheel cover 100 is configured as the unlocking guide surface 7, and / or at least the portion where the gear locking groove 5 contacts the locking engaging portion 601 in the rotation direction of the grinding wheel cover 100 is configured as the unlocking guide surface 7;

[0095] Specifically, the unlocking guide surface 7 is configured as an inclined surface or an arcuate surface; preferably, the locking engaging portion 601 is provided with the unlocking guide surface 7, and the unlocking guide surface 7 on the locking engaging portion 601 is configured as an arcuate surface.

[0096] With the above structure, when the locking engaging portion 601 is engaged in the gear locking groove 5, when the user rotates the grinding wheel cover 100, the locking engaging portion 601 will contact the gear locking groove 5. Since one of the two is configured as the unlocking guide surface 7 at the contact point, and the unlocking guide surface 7 is configured as an inclined surface or an arc-shaped surface, when the user continues to rotate the grinding wheel cover 100, the locking engaging portion 601 can be guided to move toward the second locking mating surface 4 to separate from the current gear locking groove 5. The above structure is reasonably arranged.

[0097] Furthermore, the elastic locking structure 6 includes a gear locking piece 602 and a gear locking elastic piece 603, and the gear locking piece 602 is configured to be able to engage with the gear locking groove 5 to form the locking engaging portion 601; the gear locking elastic piece 603 acts on the gear locking piece 602 so that when it is separated from the gear locking groove 5, it has a tendency to cause the locking engaging portion 601 to move toward the side of the first locking mating surface 3 to engage with the gear locking groove 5.

[0098] The above structure makes the elastic locking structure 6 more reasonable to realize its function; specifically, when the gear locking member 602 moves in the direction of separation from the gear locking groove 5, it will act on the gear locking elastic member 603 to cause it to deform, and the gear locking elastic member 603 will act in the opposite direction on the gear locking member 602 due to the deformation, so that the gear locking elastic member 603 has a tendency to make the locking engaging portion 601 move toward the side of the first locking mating surface 3 to be engaged in the gear locking groove 5.

[0099] Furthermore, the shift locking elastic member 603 is located between the shift locking member 602 and the second locking mating surface 4, and two ends of the shift locking elastic member 603 act on the shift locking member 602 and the second locking mating surface 4 respectively;

[0100] Specifically, the gear locking elastic member 603 is a spring.

[0101] The above structure makes the setting of the gear locking elastic member 603 more reasonable, so that it can be deformed when the gear locking member 602 moves in the direction of separation from the gear locking groove 5, and acts on the gear locking member 602 to have a tendency to make the locking engaging portion 601 move toward the side of the first locking mating surface 3 to be engaged in the gear locking groove 5.

[0102] Furthermore, the elastic locking structure 6 includes a gear locking housing 604, on which a gear receiving groove 6041 is provided, which matches the gear locking member 602 and provides a movable space for the gear locking member 602, and the receiving groove opening 6041a of the gear receiving groove 6041 is arranged toward the first locking mating surface 3, and the gear locking elastic member 603 is arranged between the receiving groove bottom 6041b of the gear receiving groove 6041 and the gear locking member 602, and the two ends of the locking elastic member are respectively in contact with the receiving groove bottom 6041b and the gear locking member 602 so that the gear locking member 602 in a natural state extends out of the receiving groove opening 6041a on the side away from the receiving groove bottom 6041b;

[0103] One end of the locking elastic member abuts against the gear locking member 602 to act on the gear locking member 602, and the gear locking shell 604 is arranged on the second locking mating surface 4. The other end of the locking elastic member abuts against the bottom of the accommodating groove 6041b to act on the gear locking shell 604 and indirectly act on the second locking mating surface 4.

[0104] The above structure makes the elastic locking structure 6 more reasonable; the setting of the shift member accommodating groove 6041 can not only guide the movement of the shift locking member 602, but also prevent the shift locking elastic from being twisted during the deformation process. The above structure makes the elastic locking structure 6 more stable and reliable during use;

[0105] And due to the setting of the gear locking shell 604, an environment is provided for the installation of the gear locking member 602 and the gear locking elastic member 603, forming the elastic locking structure 6 into a whole, which facilitates the installation of the elastic locking structure 6 onto the second locking mating surface 4.

[0106] Furthermore, the shift locking member 602 is a spherical structure to form the unlocking guide surface 7 .

[0107] The above structure makes the gear locking member 602 more reasonable. The spherical gear locking member 602 can not only move in the gear locking shell 604, but its surface is naturally formed into the unlocking guide surface 7, which simplifies its structure while meeting the function of the gear locking member 602.

[0108] Furthermore, a locking member limiting structure 6041 c is provided on the shift member accommodating groove 6041 for limiting the shift locking member 602 from being separated from the shift member accommodating groove 6041 .

[0109] The above structure makes the structure of the gear locking housing 604 more reasonable, and the locking member limiting structure 6041c can limit the gear locking member 602 in the gear member accommodating groove 6041 to facilitate the overall installation of the elastic locking structure 6.

[0110] Furthermore, the opening diameter of the accommodating groove opening 6041a is smaller than the diameter of the shift locking member 602 to form the locking member limiting structure 6041c;

[0111] Specifically, along the direction from the bottom 6041b of the accommodating groove to the opening 6041a of the accommodating groove, the inner diameter of the shifting member accommodating groove 6041 gradually decreases near the opening 6041a of the accommodating groove.

[0112] The above structure makes the formation of the locking member limiting structure 6041c more reasonable, and the overall structure of the gear locking housing 604 is not complicated, which is convenient for production and installation.

[0113] The inner diameter of the shift member receiving groove 6041 gradually decreases near the receiving groove opening 6041a so that this portion can be adapted to the spherical shift locking member 602, so that the end of the shift locking member 602 can extend out of the receiving groove opening 6041a.

[0114] Furthermore, a locking structure installation groove 401 for installing the elastic locking structure 6 is provided on the second locking mating surface 4 .

[0115] With the above structure, the arrangement of the locking structure mounting groove 401 facilitates the installation and fixation of the elastic locking structure 6 ; specifically, the locking structure mounting groove 401 is adapted to the gear locking housing 604 .

[0116] Furthermore, the elastic locking structure 6 is provided in plurality, and the plurality of elastic locking structures 6 are arranged at intervals around the rotation axis of the grinding wheel cover 100;

[0117] The first locking mating surface 3 is provided with at least two groups of gear locking groove groups 8, each group of the gear locking groove groups 8 includes gear locking grooves 5 whose number matches the number of the elastic locking structures 6, and when one of the elastic locking structures 6 is engaged with one of the gear locking grooves 5 in the group of the gear locking groove groups 8, the remaining elastic locking structures 6 are all engaged one by one with the remaining gear locking grooves 5 in the group of the gear locking groove groups 8.

[0118] With the above structure, a plurality of elastic locking structures 6 are provided, and each elastic locking structure 6 has a gear locking groove 5 that cooperates with it in a group of the gear locking groove group 8, so that when the elastic locking structure 6 and the gear locking groove 5 are engaged with each other, the restriction on the relative rotation of the grinding wheel cover 100 and the base component 1 is more reliable.

[0119] Furthermore, the plurality of elastic locking structures 6 are arranged at equal intervals around the rotation axis of the grinding wheel cover 100 ; and the plurality of gear locking grooves 5 are arranged at equal intervals around the rotation axis of the grinding wheel cover 100 .

[0120] The above structure makes the arrangement of the elastic locking structure 6 and the gear locking groove 5 more reasonable.

[0121] Furthermore, a mounting mating protrusion 9 is provided on the inner side wall of the grinding wheel cover mounting shaft 101 sleeve which is radially protruding toward the grinding wheel cover mounting shaft 101; correspondingly, a mounting mating groove 10 that matches the mounting mating protrusion 9 is provided at a corresponding position on the outer side wall of the grinding wheel cover mounting shaft 101 sleeve which is facing the grinding wheel cover mounting shaft 101, and the mounting mating groove 10 is extended along the rotation direction of the grinding wheel 100 cover.

[0122] When the grinding wheel cover 100 is mounted on the base component 1, the grinding wheel cover mounting shaft 101 is sleeved on the grinding wheel cover mounting shaft 101. At this time, the mounting mating protrusion 9 will be stuck in the mounting mating groove 10. Since the mounting mating groove 10 is extended along the rotation direction of the grinding wheel cover 100, the two sides of the mounting mating groove 10 will limit the movement of the mounting mating protrusion 9 in the axis direction of the grinding wheel cover mounting shaft 101, that is, limit the axial movement of the grinding wheel cover mounting shaft 101 relative to the grinding wheel cover mounting shaft 101, thereby preventing the grinding wheel 100 cover from accidentally detaching from the base component 1; and the mounting mating groove 10 can guide the sliding of the mounting mating protrusion 9 in the rotation direction of the grinding wheel cover 100, thereby making the rotation of the grinding wheel cover 100 relative to the base component 1 more stable.

[0123] Furthermore, during the installation of the grinding wheel cover 100 to the base component 1, the installation fitting groove 10 provided on the outer wall of the grinding wheel cover mounting shaft 101 will take precedence over the elastic locking structure 6 and be opposite to the inner wall of the grinding wheel cover mounting shaft 101 sleeve; the gear locking groove 5 provided on the inner wall of the grinding wheel cover mounting shaft 101 sleeve will take precedence over the installation fitting protrusion 9 and be opposite to the outer wall of the grinding wheel cover mounting shaft 101.

[0124] The above structure makes the arrangement of the mounting and fitting groove 10 and the mounting and fitting protrusion 9 more reasonable, thereby avoiding affecting the arrangement of the elastic locking structure 6 and the gear locking groove 5 .

[0125] Furthermore, a mounting avoidance opening 1001 matching the mounting matching protrusion 9 is provided on the side wall of the mounting matching groove 10 away from the elastic locking structure 6, and the mounting avoidance opening 1001 extends along the disassembly and assembly direction of the grinding wheel cover 100 away from the elastic locking structure 6.

[0126] With the above structure, the setting of the installation avoidance opening 1001 facilitates the installation matching protrusion 9 to enter and exit the installation matching groove 10, thereby facilitating the disassembly and assembly between the grinding wheel cover 100 and the basic component 1; specifically, during installation, the installation matching protrusion 9 is aligned with the installation avoidance opening 1001, and at this time, the grinding wheel 100 installation sleeve can be easily sleeved on the grinding wheel 100 installation shaft along its installation direction; during disassembly, the grinding wheel cover 100 is rotated so that the installation matching protrusion 9 is aligned with the installation avoidance opening 1001, and at this time, the grinding wheel 100 installation sleeve can be easily disassembled from the grinding wheel 100 installation shaft along its disassembly direction.

[0127] Furthermore, when the grinding wheel 100 cover is rotated and arranged on the base component 1, when the grinding wheel 100 cover is rotated until the mounting mating protrusion 9 is opposite to the corresponding mounting mating groove 10, the locking engaging portion 601 of the elastic locking structure 6 is engaged in the gear locking groove 5.

[0128] With the above structure, when the grinding wheel 100 cover is rotated so that the installation mating protrusion 9 is aligned with the installation avoidance opening 1001, since the locking clamping portion 601 of the elastic locking structure 6 is clamped into the gear locking groove 5, the elastic locking structure 6 and the gear locking groove 5 cooperate with each other to limit the axial movement of the grinding wheel 100 cover relative to the base component 1, and can prevent the grinding wheel 100 cover from being removed from the base component 1 when the grinding wheel 100 cover is adjusted; if the user needs to remove the grinding wheel 100 cover, it only needs to disengage the locking clamping portion 601 from the gear locking groove 5.

[0129] Furthermore, there are multiple mounting mating protrusions 9, and multiple mounting mating protrusions 9 are arranged around the axis of the grinding wheel cover mounting shaft 101; correspondingly, the number of mounting mating grooves 10 is matched with the mounting mating protrusions 9, and multiple mounting mating grooves 10 are arranged around the axis of the grinding wheel cover mounting shaft 101 sleeve, and the setting positions of the multiple mounting mating grooves 10 correspond one-to-one to the setting positions of the multiple mounting mating protrusions 9.

[0130] With the above structure, a plurality of the mounting and fitting protrusions 9 are provided, so that the fitting between the mounting and fitting protrusions 9 and the mounting and fitting grooves 10 is more stable and reliable.

[0131] Furthermore, during the process of mounting the grinding wheel cover 100 on the base component 1, a mounting guide surface 11 is provided at the point where the locking engaging portion 601 first contacts the grinding wheel cover mounting sleeve 202 and / or at the point where the grinding wheel cover mounting sleeve 202 first contacts the locking engaging portion 601. The mounting guide surface 11 is used to guide the locking engaging portion 601 to move toward the second locking mating surface 4 when the grinding wheel cover 100 is mounted on the base component 1.

[0132] During the removal of the grinding wheel cover 100 from the base component 1, a disassembly guide surface 12 is provided at the location where the locking engaging portion 601 first contacts the gear locking groove 5 and / or at the location where the gear locking groove 5 first contacts the locking engaging portion 601. The disassembly guide surface 12 is used to guide the locking engaging portion 601 to move toward the second locking mating surface 4 when the grinding wheel cover 100 is removed from the base component 1.

[0133] Specifically, the installation guide surface 11 is configured as an inclined surface or an arc surface; the disassembly guide surface 12 is configured as an inclined surface or an arc surface; preferably, the locking engaging portion 601 is first configured as the installation guide surface 11 at the point where it contacts the grinding wheel mounting sleeve 202, and the locking engaging portion 601 is first configured as the disassembly guide surface 12 at the point where it contacts the gear locking groove 5, and the locking engaging portion 601 is a spherical structure to form the installation guide surface 11 and the disassembly guide surface 12.

[0134] With the above structure, the installation guide surface 11 and the disassembly guide surface 12 are provided to facilitate the installation and disassembly of the grinding wheel cover 100;

[0135] During installation, due to the arrangement of the installation guide surface 11, after the grinding wheel mounting cover sleeve 202 contacts the locking engaging portion 601, it will act on the locking engaging portion 601 to move it toward the second locking mating surface 4, so as to facilitate further engagement of the grinding wheel mounting cover sleeve 202, until the gear locking groove 5 on the grinding wheel mounting cover sleeve 202 is opposite to the locking engaging portion 601, and the locking engaging portion 601 moves toward the side where it is engaged with the gear locking groove 5 to engage with the gear locking groove 5 to complete the installation;

[0136] During disassembly, the user rotates the grinding wheel cover 100 until the mounting mating protrusion 9 is opposite to the mounting mating groove 10, and disassembles along the disassembly direction of the grinding wheel cover 100. Due to the arrangement of the disassembly guide surface 12, the locking engaging portion 601 contacts the gear locking groove 5 and guides the locking engaging portion 601 to move toward the second locking mating surface 4 to separate from the gear locking groove 5, thereby facilitating the disassembly of the grinding wheel cover 100.

[0137] The above structure is reasonably arranged and convenient for users to use and operate.

[0138] Furthermore, a drive shaft avoidance hole 102 for avoiding the drive shaft of the grinding wheel 100 is provided at the axial position of the grinding wheel cover mounting shaft 101.

[0139] The above structure makes the mechanism components more reasonable. Specifically, the basic component 1 is the upper end cover structure of the electric tool.

[0140] See Figures 1 to 5 , an angle grinder, comprising the above-mentioned grinding wheel cover mechanism.

[0141] The above structure allows users to more conveniently adjust the angle of the grinding wheel 100 cover, greatly improving the user's work efficiency and user experience.

[0142] The same or similar parts between the various embodiments in this specification can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0143] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A grinding wheel cover mechanism, characterized in that: It comprises a base component (1) and a grinding wheel (100) cover having a protective cavity capable of covering the grinding wheel (100); the grinding wheel (100) cover is rotatably arranged on the base component (1); One of the grinding wheel (100) cover and the base component (1) is provided with a first locking mating surface (3), and the other of the grinding wheel (100) cover and the base component (1) is provided with a second locking mating surface (4), and the first locking mating surface (3) and the second locking mating surface (4) are arranged opposite to each other; The first locking mating surface (3) is provided with at least two gear locking grooves (5), and the plurality of gear locking grooves (5) are arranged at intervals around the rotation axis of the grinding wheel (100) cover; The second locking mating surface (4) is provided with an elastic locking structure (6), and a locking engaging portion (601) capable of engaging with the gear locking groove (5) is provided on a side of the elastic locking structure (6) facing the first locking mating surface (3), and the elastic locking structure (6) has a tendency to move the locking engaging portion (601) toward the side of the first locking mating surface (3) to engage with the gear locking groove (5) when the locking engaging portion (601) is separated from the gear locking groove (5); The gear locking groove (5) and / or the elastic locking structure (6) are provided with an unlocking guide surface (7) for guiding the locking engaging portion (601) to move toward the second locking mating surface (4) to separate from the gear locking groove (5) when the grinding wheel (100) cover rotates relative to the base component (1).

2. The grinding wheel cover mechanism according to claim 1, characterized in that: The basic component (1) includes a grinding wheel cover mounting shaft (101) for mounting the grinding wheel (100) cover. Correspondingly, the grinding wheel (100) cover includes a grinding wheel cover mounting shaft sleeve (202) that matches the grinding wheel cover mounting shaft (101) and can be sleeved on the grinding wheel cover mounting shaft (101). The outer side wall of the grinding wheel cover mounting shaft (101) facing the grinding wheel cover mounting shaft (101) sleeve forms the second locking mating surface (4); correspondingly, the inner side wall of the grinding wheel cover mounting shaft (101) sleeve facing the grinding wheel cover mounting shaft (101) forms the first locking mating surface (3).

3. The grinding wheel cover mechanism according to claim 1, characterized in that: When the locking engaging portion (601) is engaged with the gear locking groove (5), as the grinding wheel (100) cover rotates, the locking engaging portion (601) is configured as the unlocking guide surface (7) at least at a location where the grinding wheel (100) cover contacts the gear locking groove (5) in the rotation direction of the grinding wheel (100) cover, and / or the gear locking groove (5) is configured as the unlocking guide surface (7) at least at a location where the grinding wheel (100) cover contacts the locking engaging portion (601) in the rotation direction of the grinding wheel (100) cover; The unlocking guide surface (7) is configured as an inclined surface or an arc surface.

4. The grinding wheel cover mechanism according to claim 1, characterized in that: The elastic locking structure (6) comprises a gear locking member (602) and a gear locking elastic member (603), wherein the gear locking member (602) is configured to be capable of engaging with the gear locking groove (5) to form the locking engaging portion (601); the gear locking elastic member (603) acts on the gear locking member (602) so that the gear locking member (602) has a tendency to move toward the first locking mating surface (3) to engage with the gear locking groove (5) when the gear locking member (602) is separated from the gear locking groove (5); The shift locking elastic member (603) is located between the shift locking member (602) and the second locking mating surface (4), and two ends of the shift locking elastic member (603) act on the shift locking member (602) and the second locking mating surface (4) respectively.

5. The grinding wheel cover mechanism according to claim 4, characterized in that: The elastic locking structure (6) includes a shift locking shell (604), the shift locking shell (604) is provided with a shift member receiving groove (6041) that matches the shift locking member (602) and provides a movable space for the shift locking member (602), and the receiving groove opening (6041a) of the shift member receiving groove (6041) is arranged toward the first locking mating surface (3), the shift locking elastic member (603) is arranged between the receiving groove bottom (6041b) of the shift member receiving groove (6041) and the shift locking member (602), and the two ends of the locking elastic member are respectively in contact with the receiving groove bottom (6041b) and the shift locking member (602) so that the shift locking member (602) in a natural state extends out of the receiving groove opening (6041a) on a side away from the receiving groove bottom (6041b); The gear locking member (602) is in a spherical structure to form the unlocking guide surface (7); The shift member accommodating groove (6041) is provided with a locking member limiting structure (6041c) for limiting the shift locking member (602) from being separated from the shift member accommodating groove (6041); The opening diameter of the accommodating groove opening (6041a) is smaller than the diameter of the gear locking member (602) to form the locking member limiting structure (6041c); Along the direction from the bottom (6041b) of the accommodating groove to the opening (6041a) of the accommodating groove, the inner diameter of the shifting member accommodating groove (6041) near the accommodating groove opening (6041a) gradually decreases; The second locking mating surface (4) is provided with a locking structure mounting groove (401) for mounting the elastic locking structure (6).

6. The grinding wheel cover mechanism according to claim 1, characterized in that: A plurality of the elastic locking structures (6) are provided, and the plurality of the elastic locking structures (6) are arranged at intervals around the rotation axis of the grinding wheel (100) cover; The first locking mating surface (3) is provided with at least two groups of gear locking groove groups (8), each group of the gear locking groove groups (8) includes gear locking grooves (5) whose number matches the number of the elastic locking structures (6), and when one of the elastic locking structures (6) is engaged with one of the gear locking grooves (5) in the group of the gear locking groove groups (8), the remaining elastic locking structures (6) are engaged with the remaining gear locking grooves (5) in the group of the gear locking groove groups (8) in a one-to-one correspondence; The plurality of elastic locking structures (6) are arranged at equal intervals around the rotation axis of the grinding wheel (100) cover; and the plurality of gear locking grooves (5) are arranged at equal intervals around the rotation axis of the grinding wheel (100) cover.

7. The grinding wheel cover mechanism according to claim 2, characterized in that: A mounting mating protrusion (9) is provided on the inner side wall of the grinding wheel cover mounting shaft (101) sleeve facing the grinding wheel cover mounting shaft (101) in a radially protruding manner; correspondingly, a mounting mating groove (10) matching the mounting mating protrusion (9) is provided at a corresponding position on the outer side wall of the grinding wheel cover mounting shaft (101) sleeve facing the grinding wheel cover mounting shaft (101), and the mounting mating groove (10) is extended along the rotation direction of the grinding wheel (100) cover; During the installation of the grinding wheel cover (100) to the base component (1), the mounting fitting groove (10) provided on the outer side wall of the grinding wheel cover mounting shaft (101) will be opposite to the inner side wall of the grinding wheel cover mounting shaft (101) sleeve in priority to the elastic locking structure (6); the gear locking groove (5) provided on the inner side wall of the grinding wheel cover mounting shaft (101) sleeve will be opposite to the outer side wall of the grinding wheel cover mounting shaft (101) in priority to the mounting fitting protrusion (9).

8. The grinding wheel cover mechanism according to claim 7, characterized in that: A mounting avoidance opening (1001) matching the mounting matching protrusion (9) is provided on a side wall of the mounting matching groove (10) away from the elastic locking structure (6), and the mounting avoidance opening (1001) is extended along the disassembly direction of the grinding wheel (100) cover toward a side away from the elastic locking structure (6); When the grinding wheel (100) cover is rotated and arranged on the base component (1), when the grinding wheel (100) cover is rotated until the mounting mating protrusion (9) faces the mounting mating groove (10) corresponding thereto, the locking engaging portion (601) of the elastic locking structure (6) is engaged in the gear locking groove (5); There are a plurality of mounting mating protrusions (9), and the plurality of mounting mating protrusions (9) are arranged around the axis of the grinding wheel cover mounting shaft (101); correspondingly, the number of mounting mating grooves (10) is matched with the number of mounting mating protrusions (9), and the plurality of mounting mating grooves (10) are arranged around the axis of the grinding wheel cover mounting shaft (101) sleeve, and the setting positions of the plurality of mounting mating grooves (10) correspond one-to-one to the setting positions of the plurality of mounting mating protrusions (9).

9. The grinding wheel cover mechanism according to claim 7, characterized in that: During the process of installing the grinding wheel (100) cover to the base component (1), a mounting guide surface (11) is provided at the point where the locking engaging portion (601) first contacts the grinding wheel cover mounting sleeve (202) and / or at the point where the grinding wheel cover mounting sleeve (202) first contacts the locking engaging portion (601), and the mounting guide surface (11) is used to guide the locking engaging portion (601) to move toward the second locking mating surface (4) when the grinding wheel (100) cover is installed to the base component (1); During the process of disassembling the grinding wheel (100) cover from the base component (1), a disassembly guide surface (12) is provided at the point where the locking engaging portion (601) first contacts the gear locking groove (5) and / or at the point where the gear locking groove (5) first contacts the locking engaging portion (601), and the disassembly guide surface (12) is used to guide the locking engaging portion (601) to move toward the second locking mating surface (4) when the grinding wheel (100) cover is disassembled from the base component (1); The installation guide surface (11) is configured as an inclined surface or an arcuate surface; the disassembly guide surface (12) is configured as an inclined surface or an arcuate surface; A drive shaft avoidance hole (102) for avoiding the drive shaft of the grinding wheel (100) is provided at the axis position of the grinding wheel cover mounting shaft (101).

10. An angle grinder, characterized in that: The invention comprises the grinding wheel cover mechanism according to any one of claims 1 to 9.

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